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source: soft/giet_vm/giet_kernel/sys_handler.c @ 750

Last change on this file since 750 was 733, checked in by alain, 9 years ago
Modify the system functions associated to hardware coprocessors: Introduce two explicit arguments "cluster_xy" and "cluster_type" to allows any task to control a coprocessor located in any cluster.
Property svn:executable set to ``*
File size: 120.6 KB

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1	///////////////////////////////////////////////////////////////////////////////////
2	// File : sys_handler.c
3	// Date : 01/04/2012
4	// Author : alain greiner and joel porquet
5	// Copyright (c) UPMC-LIP6
6	///////////////////////////////////////////////////////////////////////////////////
7
8	#include <sys_handler.h>
9	#include <tty_driver.h>
10	#include <tim_driver.h>
11	#include <nic_driver.h>
12	#include <mmc_driver.h>
13	#include <mwr_driver.h>
14	#include <cma_driver.h>
15	#include <ctx_handler.h>
16	#include <fat32.h>
17	#include <elf-types.h>
18	#include <utils.h>
19	#include <kernel_malloc.h>
20	#include <tty0.h>
21	#include <vmem.h>
22	#include <hard_config.h>
23	#include <giet_config.h>
24	#include <mapping_info.h>
25	#include <irq_handler.h>
26	#include <io.h>
27
28	#if !defined(X_SIZE)
29	# error: You must define X_SIZE in the hard_config.h file
30	#endif
31
32	#if !defined(Y_SIZE)
33	# error: You must define Y_SIZE in the hard_config.h file
34	#endif
35
36	#if !defined(NB_PROCS_MAX)
37	# error: You must define NB_PROCS_MAX in the hard_config.h file
38	#endif
39
40	#if !defined(SEG_BOOT_MAPPING_BASE)
41	# error: You must define SEG_BOOT_MAPPING_BASE in the hard_config.h file
42	#endif
43
44	#if !defined(NB_TTY_CHANNELS)
45	# error: You must define NB_TTY_CHANNELS in the hard_config.h file
46	#endif
47
48	#if (NB_TTY_CHANNELS < 1)
49	# error: NB_TTY_CHANNELS cannot be smaller than 1!
50	#endif
51
52	#if !defined(NB_TIM_CHANNELS)
53	# error: You must define NB_TIM_CHANNELS in the hard_config.h file
54	#endif
55
56	#if !defined(NB_NIC_CHANNELS)
57	# error: You must define NB_NIC_CHANNELS in the hard_config.h file
58	#endif
59
60	#if !defined(NB_CMA_CHANNELS)
61	# error: You must define NB_CMA_CHANNELS in the hard_config.h file
62	#endif
63
64	#if !defined(GIET_NO_HARD_CC)
65	# error: You must define GIET_NO_HARD_CC in the giet_config.h file
66	#endif
67
68	#if !defined ( GIET_NIC_MAC4 )
69	# error: You must define GIET_NIC_MAC4 in the giet_config.h file
70	#endif
71
72	#if !defined ( GIET_NIC_MAC2 )
73	# error: You must define GIET_NIC_MAC2 in the giet_config.h file
74	#endif
75
76	////////////////////////////////////////////////////////////////////////////
77	// Extern variables
78	////////////////////////////////////////////////////////////////////////////
79
80	// allocated in tty0.c file.
81	extern sqt_lock_t _tty0_sqt_lock;
82
83	// allocated in mwr_driver.c file.
84	extern simple_lock_t _coproc_lock[X_SIZE*Y_SIZE];
85	extern unsigned int _coproc_type[X_SIZE*Y_SIZE];
86	extern unsigned int _coproc_info[X_SIZE*Y_SIZE];
87	extern unsigned int _coproc_mode[X_SIZE*Y_SIZE];
88	extern unsigned int _coproc_error[X_SIZE*Y_SIZE];
89	extern unsigned int _coproc_trdid[X_SIZE*Y_SIZE];
90
91	// allocated in tty_driver.c file.
92	extern tty_fifo_t _tty_rx_fifo[NB_TTY_CHANNELS];
93
94	// allocated in kernel_init.c file
95	extern static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX];
96
97	// allocated in bdv_driver.c file
98	spin_lock_t _bdv_lock;
99
100	////////////////////////////////////////////////////////////////////////////////
101	// Allocator protecting exclusive access to FBF by a single application.
102	// - The number of users in a given application should be set by a single
103	// thread using an _atomic_test_and_set().
104	// - The allocator is atomically decremented by each user thread when
105	// the thread exit.
106	////////////////////////////////////////////////////////////////////////////////
107
108	__attribute__((section(".kdata")))
109	unsigned int _fbf_alloc = 0;
110
111	////////////////////////////////////////////////////////////////////////////////
112	// Channel allocators for multi-channels peripherals
113	// - The array _***_channel_allocator[channel] defines the number of user
114	// threads for a dynamically allocated channel of peripheral ***.
115	// - The array _***_channel_wti[channel] defines the WTI index and the
116	// processor coordinates for the processor receiving the channel WTI.
117	////////////////////////////////////////////////////////////////////////////////
118
119	#if NB_TTY_CHANNELS
120	__attribute__((section(".kdata")))
121	unsigned int _tty_channel_alloc[NB_TTY_CHANNELS] = {0};
122
123	__attribute__((section(".kdata")))
124	unsigned int _tty_channel_wti[NB_TTY_CHANNELS];
125	#endif
126
127	#if NB_TIM_CHANNELS
128	__attribute__((section(".kdata")))
129	unsigned int _tim_channel_alloc[NB_TIM_CHANNELS] = {0};
130
131	__attribute__((section(".kdata")))
132	unsigned int _tim_channel_wti[NB_TIM_CHANNELS];
133	#endif
134
135	#if NB_CMA_CHANNELS
136	__attribute__((section(".kdata")))
137	unsigned int _cma_channel_alloc[NB_CMA_CHANNELS] = {0};
138
139	__attribute__((section(".kdata")))
140	unsigned int _cma_channel_wti[NB_CMA_CHANNELS];
141	#endif
142
143	#if NB_NIC_CHANNELS
144	__attribute__((section(".kdata")))
145	unsigned int _nic_rx_channel_alloc[NB_NIC_CHANNELS] = {0};
146
147	__attribute__((section(".kdata")))
148	unsigned int _nic_rx_channel_wti[NB_NIC_CHANNELS];
149
150	__attribute__((section(".kdata")))
151	unsigned int _nic_tx_channel_alloc[NB_NIC_CHANNELS] = {0};
152
153	__attribute__((section(".kdata")))
154	unsigned int _nic_tx_channel_wti[NB_NIC_CHANNELS];
155	#endif
156
157	////////////////////////////////////////////////////////////////////////////
158	// NIC_RX and NIC_TX kernel chbuf arrays
159	////////////////////////////////////////////////////////////////////////////
160
161	__attribute__((section(".kdata")))
162	nic_chbuf_t _nic_ker_rx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(64)));
163
164	__attribute__((section(".kdata")))
165	nic_chbuf_t _nic_ker_tx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(64)));
166
167	////////////////////////////////////////////////////////////////////////////
168	// FBF related chbuf
169	// The physical address of this chbuf is required for L2 cache sync.
170	////////////////////////////////////////////////////////////////////////////
171
172	__attribute__((section(".kdata")))
173	fbf_chbuf_t _fbf_ker_chbuf __attribute__((aligned(64)));
174
175	__attribute__((section(".kdata")))
176	unsigned long long _fbf_chbuf_paddr;
177
178	////////////////////////////////////////////////////////////////////////////
179	// Initialize the syscall vector with syscall handlers
180	// Note: This array must be synchronised with the define in file stdio.h
181	////////////////////////////////////////////////////////////////////////////
182
183	__attribute__((section(".kdata")))
184	const void * _syscall_vector[64] =
185	{
186	&_sys_proc_xyp, /* 0x00 */
187	&_get_proctime, /* 0x01 */
188	&_sys_procs_number, /* 0x02 */
189	&_sys_xy_from_ptr, /* 0x03 */
190	&_sys_ukn, /* 0x04 */
191	&_sys_vseg_get_vbase, /* 0x05 */
192	&_sys_vseg_get_length, /* 0x06 */
193	&_sys_heap_info, /* 0x07 */
194	&_sys_fbf_size, /* 0x08 */
195	&_sys_fbf_alloc, /* 0x09 */
196	&_sys_fbf_cma_alloc, /* 0x0A */
197	&_sys_fbf_cma_init_buf, /* 0x0B */
198	&_sys_fbf_cma_start, /* 0x0C */
199	&_sys_fbf_cma_display, /* 0x0D */
200	&_sys_fbf_cma_stop, /* 0x0E */
201	&_sys_fbf_cma_check, /* 0x0F */
202
203	&_sys_applications_status, /* 0x10 */
204	&_sys_fbf_sync_write, /* 0x11 */
205	&_sys_fbf_sync_read, /* 0x12 */
206	&_sys_ukn, /* 0x13 */
207	&_sys_tim_alloc, /* 0x14 */
208	&_sys_tim_start, /* 0x15 */
209	&_sys_tim_stop, /* 0x16 */
210	&_sys_kill_application, /* 0x17 */
211	&_sys_exec_application, /* 0x18 */
212	&_sys_ukn, /* 0x19 */
213	&_sys_pthread_control, /* 0x1A */
214	&_sys_pthread_yield, /* 0x1B */
215	&_sys_pthread_kill, /* 0x1C */
216	&_sys_pthread_create, /* 0x1D */
217	&_sys_pthread_join, /* 0x1E */
218	&_sys_pthread_exit, /* 0x1F */
219
220	&_fat_open, /* 0x20 */
221	&_fat_read, /* 0x21 */
222	&_fat_write, /* 0x22 */
223	&_fat_lseek, /* 0x23 */
224	&_fat_file_info, /* 0x24 */
225	&_fat_close, /* 0x25 */
226	&_fat_remove, /* 0x26 */
227	&_fat_rename, /* 0x27 */
228	&_fat_mkdir, /* 0x28 */
229	&_fat_opendir, /* 0x29 */
230	&_fat_closedir, /* 0x2A */
231	&_fat_readdir, /* 0x2B */
232	&_sys_ukn, /* 0x2C */
233	&_sys_ukn, /* 0x2D */
234	&_sys_ukn, /* 0x2E */
235	&_sys_ukn, /* 0x2F */
236
237	&_sys_nic_alloc, /* 0x30 */
238	&_sys_nic_start, /* 0x31 */
239	&_sys_nic_move, /* 0x32 */
240	&_sys_nic_stop, /* 0x33 */
241	&_sys_nic_stats, /* 0x34 */
242	&_sys_nic_clear, /* 0x35 */
243	&_sys_tty_write, /* 0x36 */
244	&_sys_tty_read, /* 0x37 */
245	&_sys_tty_alloc, /* 0x38 */
246	&_sys_ukn, /* 0x39 */
247	&_sys_ukn, /* 0x3A */
248	&_sys_coproc_completed, /* 0x3B */
249	&_sys_coproc_alloc, /* 0x3C */
250	&_sys_coproc_channel_init, /* 0x3D */
251	&_sys_coproc_run, /* 0x3E */
252	&_sys_coproc_release, /* 0x3F */
253	};
254
255
256	//////////////////////////////////////////////////////////////////////////////
257	// Applications related syscall handlers
258	//////////////////////////////////////////////////////////////////////////////
259
260	////////////////////////////////////////////////////////////////////////
261	// This function is called by the _sys_exec_application function
262	// to reload all data segments contained in an application.elf file.
263	// File checking is minimal, because these segments have already
264	// been loaded by the boot code.
265	////////////////////////////////////////////////////////////////////////
266	static unsigned int _load_writable_segments( mapping_vspace_t* vspace )
267	{
268
269	#if GIET_DEBUG_EXEC
270	unsigned int gpid = _get_procid();
271	unsigned int cluster_xy = gpid >> P_WIDTH;
272	unsigned int p = gpid & ((1<<P_WIDTH)-1);
273	unsigned int x = cluster_xy >> Y_WIDTH;
274	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
275	if ( _get_proctime() > GIET_DEBUG_EXEC )
276	_printf("\n[DEBUG EXEC] _load_writable_segments() at cycle %d\n"
277	"P[%d,%d,%d] enters for %s\n",
278	_get_proctime() , x , y , p , vspace->name );
279	#endif
280
281	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
282	mapping_vseg_t* vseg = _get_vseg_base(header);
283
284	unsigned int vseg_id; // vseg index in mapping
285	char buf[4096]; // buffer to store one cluster
286	unsigned int fd = 0; // file descriptor
287	unsigned int found = 0;
288
289	// first scan on vsegs in vspace to find the .elf pathname
290	for (vseg_id = vspace->vseg_offset;
291	vseg_id < (vspace->vseg_offset + vspace->vsegs);
292	vseg_id++)
293	{
294	if( vseg[vseg_id].type == VSEG_TYPE_ELF )
295	{
296	// open the .elf file associated to vspace
297	fd = _fat_open( vseg[vseg_id].binpath , O_RDONLY );
298	if ( fd < 0 ) return 1;
299
300	#if GIET_DEBUG_EXEC
301	if ( _get_proctime() > GIET_DEBUG_EXEC )
302	_printf("\n[DEBUG EXEC] _load_writable_segments() at cycle %d\n"
303	"P[%d,%d,%d] open %s / fd = %d\n",
304	_get_proctime() , x , y , p , vseg[vseg_id].binpath , fd );
305	#endif
306	found = 1;
307	break;
308
309	}
310	}
311
312	// check .elf file found
313	if ( found == 0 )
314	{
315	_printf("\n[GIET ERROR] _load_writable_segments() : .elf not found\n");
316	return 1;
317	}
318
319	// load Elf-Header into buffer from .elf file
320	if ( _fat_lseek( fd, 0, SEEK_SET ) < 0 )
321	{
322	_printf("\n[GIET ERROR] _load_writable_segments() : cannot seek\n");
323	_fat_close( fd );
324	return 1;
325	}
326	if ( _fat_read( fd, (unsigned int)buf, 4096, 0 ) < 0 )
327	{
328	_printf("\n[GIET ERROR] _load_writable_segments() : cannot read\n");
329	_fat_close( fd );
330	return 1;
331	}
332
333	#if GIET_DEBUG_EXEC
334	if ( _get_proctime() > GIET_DEBUG_EXEC )
335	_printf("\n[DEBUG EXEC] _load_writable_segments() at cycle %d\n"
336	"P[%d,%d,%d] loaded Elf-Header\n",
337	_get_proctime() , x , y , p );
338	#endif
339
340	// get nsegments and Program-Header-Table offset from Elf-Header
341	Elf32_Ehdr* elf_header_ptr = (Elf32_Ehdr*)buf;
342	unsigned int offset = elf_header_ptr->e_phoff;
343	unsigned int nsegments = elf_header_ptr->e_phnum;
344
345	// load Program-Header-Table from .elf file
346	if ( _fat_lseek( fd, offset, SEEK_SET ) < 0 )
347	{
348	_fat_close( fd );
349	return 1;
350	}
351	if ( _fat_read( fd, (unsigned int)buf, 4096, 0 ) < 0 )
352	{
353	_fat_close( fd );
354	return 1;
355	}
356
357	#if GIET_DEBUG_EXEC
358	if ( _get_proctime() > GIET_DEBUG_EXEC )
359	_printf("\n[DEBUG EXEC] _load_writable_segments() at cycle %d\n"
360	"P[%d,%d,%d] loaded Program-Header-Table\n",
361	_get_proctime() , x , y , p );
362	#endif
363
364	// set Program-Header-Table pointer
365	Elf32_Phdr* elf_pht_ptr = (Elf32_Phdr*)buf;
366
367	// second scan on vsegs in vspace to load the seg_data segments :
368	// - type == VSEG_TYPE_ELF
369	// - non eXecutable
370	for (vseg_id = vspace->vseg_offset;
371	vseg_id < (vspace->vseg_offset + vspace->vsegs);
372	vseg_id++)
373	{
374	if( (vseg[vseg_id].type == VSEG_TYPE_ELF) && // type ELF
375	((vseg[vseg_id].mode & 0x4) == 0) ) // non executable
376	{
377	// get vbase and pbase
378	paddr_t pbase = vseg[vseg_id].pbase;
379	unsigned int vbase = vseg[vseg_id].vbase;
380
381	// scan segments in Progam-Header-Table to find match
382	// No match checking as the segment was previously found
383	unsigned int seg;
384	for (seg = 0 ; seg < nsegments ; seg++)
385	{
386	if ( (elf_pht_ptr[seg].p_type == PT_LOAD) && // loadable
387	(elf_pht_ptr[seg].p_flags & PF_W) && // writable
388	(elf_pht_ptr[seg].p_vaddr == vbase) ) // matching
389	{
390	// Get segment offset and size in .elf file
391	unsigned int seg_offset = elf_pht_ptr[seg].p_offset;
392	unsigned int seg_size = elf_pht_ptr[seg].p_filesz;
393
394	// compute destination address and extension for _fat_read()
395	unsigned int dest = (unsigned int)pbase;
396	unsigned int extend = (unsigned int)(pbase>>32) \| 0xFFFF0000;
397
398	// load the segment
399	if ( _fat_lseek( fd, seg_offset, SEEK_SET ) < 0 )
400	{
401	_fat_close( fd );
402	return 1;
403	}
404	if ( _fat_read( fd, dest, seg_size, extend ) < 0 )
405	{
406	_fat_close( fd );
407	return 1;
408	}
409	}
410	}
411
412	#if GIET_DEBUG_EXEC
413	if ( _get_proctime() > GIET_DEBUG_EXEC )
414	_printf("\n[DEBUG EXEC] _load_writable_segments() at cycle %d\n"
415	"P[%d,%d,%d] loaded segment %x\n",
416	_get_proctime() , x , y , p , vbase );
417	#endif
418	}
419	} // end loop on writable & loadable segments
420
421	// close .elf file
422	_fat_close( fd );
423
424	return 0;
425	} // end load_writable_segments()
426
427
428
429	///////////////////////////////////////
430	int _sys_exec_application( char* name )
431	{
432	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
433	mapping_vspace_t * vspace = _get_vspace_base(header);
434	mapping_thread_t * thread = _get_thread_base(header);
435	mapping_vseg_t * vseg = _get_vseg_base(header);
436
437	unsigned int vspace_id;
438	unsigned int thread_id;
439
440	#if GIET_DEBUG_EXEC
441	unsigned int gpid = _get_procid();
442	unsigned int cluster_xy = gpid >> P_WIDTH;
443	unsigned int p = gpid & ((1<<P_WIDTH)-1);
444	unsigned int x = cluster_xy >> Y_WIDTH;
445	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
446	if ( _get_proctime() > GIET_DEBUG_EXEC )
447	_printf("\n[DEBUG EXEC] _sys_exec_application() at cycle %d\n"
448	"P[%d,%d,%d] enters for vspace %s\n",
449	_get_proctime() , x, y, p, name );
450	#endif
451
452	unsigned int y_size = header->y_size;
453
454	// scan vspaces to find matching vspace name
455	for (vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++)
456	{
457	if ( _strcmp( vspace[vspace_id].name, name ) == 0 ) // vspace found
458	{
459
460	#if GIET_DEBUG_EXEC
461	if ( _get_proctime() > GIET_DEBUG_EXEC )
462	_printf("\n[DEBUG EXEC] _sys_exec_application() at cycle %d\n"
463	"P[%d,%d,%d] found vspace %s\n",
464	_get_proctime() , x, y, p, name );
465	#endif
466	// reload writable segments
467	if ( _load_writable_segments( &vspace[vspace_id] ) )
468	{
469	_printf("[GIET ERROR] _sys_exec_application() : "
470	"can't load data segment for vspace %s\n", name );
471	return SYSCALL_CANNOT_LOAD_DATA_SEGMENT;
472	}
473
474	#if GIET_DEBUG_EXEC
475	if ( _get_proctime() > GIET_DEBUG_EXEC )
476	_printf("\n[DEBUG EXEC] _sys_exec_application() at cycle %d\n"
477	"P[%d,%d,%d] loaded all writable segments for vspace %s\n",
478	_get_proctime() , x, y, p, name );
479	#endif
480	// scan threads in vspace with three goals :
481	// - check all threads desactivated
482	// - re-initialise all threads contexts
483	// - find main thread
484	unsigned int main_found = 0;
485	unsigned int main_ltid = 0;
486	static_scheduler_t* main_psched = NULL;
487	unsigned int min = vspace[vspace_id].thread_offset;
488	unsigned int max = min + vspace[vspace_id].threads;
489	for ( thread_id = min ; thread_id < max ; thread_id++ )
490	{
491	// get thread identifiers : [x,y,p,ltid]
492	unsigned int cid = thread[thread_id].clusterid;
493	unsigned int x = cid / y_size;
494	unsigned int y = cid % y_size;
495	unsigned int p = thread[thread_id].proclocid;
496	unsigned int ltid = thread[thread_id].ltid;
497	unsigned int vsid = thread[thread_id].stack_vseg_id;
498
499	// get scheduler pointer
500	static_scheduler_t* psched = _schedulers[x][y][p];
501
502	// check thread non active
503	if ( psched->context[ltid].slot[CTX_NORUN_ID] == 0 ) // runnable !!!
504	{
505	_printf("\n[GIET ERROR] in _sys_exec_application() : "
506	"thread %s already active in vspace %s\n",
507	thread[thread_id].name, name );
508	return SYSCALL_THREAD_ALREADY_ACTIVE;
509	}
510
511	// initialise thread context
512	unsigned int ctx_epc = psched->context[ltid].slot[CTX_ENTRY_ID];
513	unsigned int ctx_sp = vseg[vsid].vbase + vseg[vsid].length;
514	unsigned int ctx_ra = (unsigned int)&_ctx_eret;
515	unsigned int ctx_sr = GIET_SR_INIT_VALUE;
516
517	psched->context[ltid].slot[CTX_EPC_ID] = ctx_epc;
518	psched->context[ltid].slot[CTX_RA_ID] = ctx_ra;
519	psched->context[ltid].slot[CTX_SR_ID] = ctx_sr;
520	psched->context[ltid].slot[CTX_SP_ID] = ctx_sp;
521
522	// register information required to activate main thread
523	// actual activation done when threads initialisation is completed
524	if ( thread[thread_id].is_main )
525	{
526	main_psched = psched;
527	main_ltid = ltid;
528	main_found = 1;
529	}
530
531	#if GIET_DEBUG_EXEC
532	if ( _get_proctime() > GIET_DEBUG_EXEC )
533	_printf("\n[DEBUG EXEC] _sys_exec_application() at cycle %d\n"
534	"P[%d,%d,%d] initialise thread %s in vspace %s\n",
535	_get_proctime() , x, y, p, thread[thread_id].name , name );
536	#endif
537	} // end loop on threads
538
539	// activate main thread
540	if ( main_found )
541	{
542	main_psched->context[main_ltid].slot[CTX_NORUN_ID] = 0;
543	}
544	else
545	{
546	_printf("\n[GIET ERROR] in _sys_exec_application() : "
547	"main not found in vspace %s\n", name );
548	return SYSCALL_MAIN_NOT_FOUND;
549	}
550
551	_printf("\n[GIET WARNING] application %s launched : %d threads\n",
552	name , max-min );
553
554	return SYSCALL_OK;
555	}
556	} // end of loop on vspaces
557
558	// vspace not found
559	_printf("\n[GIET ERROR] in _sys_exec_application() : "
560	"vspace %s not found\n", name );
561	return SYSCALL_VSPACE_NOT_FOUND;
562
563	} // end _sys_exec_application()
564
565
566	///////////////////////////////////////
567	int _sys_kill_application( char* name )
568	{
569	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
570	mapping_vspace_t * vspace = _get_vspace_base(header);
571	mapping_thread_t * thread = _get_thread_base(header);
572
573	unsigned int vspace_id;
574	unsigned int thread_id;
575
576	#if GIET_DEBUG_EXEC
577	unsigned int gpid = _get_procid();
578	unsigned int cluster_xy = gpid >> P_WIDTH;
579	unsigned int p = gpid & ((1<<P_WIDTH)-1);
580	unsigned int x = cluster_xy >> Y_WIDTH;
581	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
582	if ( _get_proctime() > GIET_DEBUG_EXEC )
583	_printf("\n[DEBUG EXEC] _sys_kill_application() at cycle %d\n"
584	"P[%d,%d,%d] enters for vspace %s\n",
585	_get_proctime() , x , y , p , name );
586	#endif
587
588	// shell cannot be killed
589	if ( _strcmp( name , "shell" ) == 0 )
590	{
591	_printf("\n[GIET ERROR] in _sys_kill_application() : "
592	"%s application cannot be killed\n", name );
593	return SYSCALL_APPLI_CANNOT_BE_KILLED;
594	}
595
596	// scan vspaces to find matching vspace name
597	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
598	{
599	if ( _strcmp( vspace[vspace_id].name, name ) == 0 )
600	{
601	// scan threads to send KILL signal to all threads in vspace
602	unsigned int y_size = header->y_size;
603	unsigned int min = vspace[vspace_id].thread_offset;
604	unsigned int max = min + vspace[vspace_id].threads;
605	for ( thread_id = min ; thread_id < max ; thread_id++ )
606	{
607	unsigned int cid = thread[thread_id].clusterid;
608	unsigned int x = cid / y_size;
609	unsigned int y = cid % y_size;
610	unsigned int p = thread[thread_id].proclocid;
611	unsigned int ltid = thread[thread_id].ltid;
612
613	// get scheduler pointer for processor running the thread
614	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
615
616	// set KILL signal bit
617	_atomic_or( &psched->context[ltid].slot[CTX_SIGS_ID] , SIGS_MASK_KILL );
618	}
619
620	_printf("\n[GIET WARNING] application %s killed / %d threads\n",
621	name , max-min );
622
623	return SYSCALL_OK;
624	}
625	} // en loop on vspaces
626
627	_printf("\n[GIET ERROR] in _sys_kill_application() : "
628	"application %s not found\n", name );
629	return SYSCALL_VSPACE_NOT_FOUND;
630
631	} // end _sys_kill_application()
632
633
634
635	//////////////////////////////////////////
636	int _sys_applications_status( char* name )
637	{
638	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
639	mapping_thread_t * thread = _get_thread_base(header);
640	mapping_vspace_t * vspace = _get_vspace_base(header);
641	mapping_cluster_t * cluster = _get_cluster_base(header);
642
643	unsigned int thread_id; // thread index in mapping
644	unsigned int vspace_id; // vspace index in mapping
645
646	// scan vspaces
647	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
648	{
649	if ( (name == NULL) \|\| (_strcmp(vspace[vspace_id].name , name ) == 0) )
650	{
651	_user_printf("\n*** vspace %s\n", vspace[vspace_id].name );
652
653	// scan all threads in vspace
654	unsigned int min = vspace[vspace_id].thread_offset ;
655	unsigned int max = min + vspace[vspace_id].threads ;
656	for ( thread_id = min ; thread_id < max ; thread_id++ )
657	{
658	unsigned int clusterid = thread[thread_id].clusterid;
659	unsigned int p = thread[thread_id].proclocid;
660	unsigned int x = cluster[clusterid].x;
661	unsigned int y = cluster[clusterid].y;
662	unsigned int ltid = thread[thread_id].ltid;
663	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
664	unsigned int norun = psched->context[ltid].slot[CTX_NORUN_ID];
665	unsigned int tty = psched->context[ltid].slot[CTX_TTY_ID];
666	unsigned int current = psched->current;
667
668	if ( current == ltid )
669	_user_printf(" - thread %s / P[%d,%d,%d] / ltid = %d / "
670	"TTY = %d / norun = %x : running\n",
671	thread[thread_id].name, x, y, p, ltid, tty, norun );
672	else if ( norun == 0 )
673	_user_printf(" - thread %s / P[%d,%d,%d] / ltid = %d / "
674	"TTY = %d / norun = %x : runable\n",
675	thread[thread_id].name, x, y, p, ltid, tty, norun);
676	else
677	_user_printf(" - thread %s / P[%d,%d,%d] / ltid = %d / "
678	"TTY = %d / norun = %x : blocked\n",
679	thread[thread_id].name, x, y, p, ltid, tty, norun);
680	}
681	}
682	}
683	_user_printf("\n");
684
685	return SYSCALL_OK;
686	} // end _sys_applications_status()
687
688
689
690	/////////////////////////////////////////////////////////////////////////////
691	// Threads related syscall handlers
692	/////////////////////////////////////////////////////////////////////////////
693
694	////////////////////////////////////////////////
695	int _sys_pthread_create( unsigned int* buffer,
696	void* attr,
697	void* function,
698	void* arg )
699	{
700	// attr argument not supported
701	if ( attr != NULL )
702	{
703	_printf("\n[GIET ERROR] in _sys_pthread_create() : "
704	"attr argument not supported\n" );
705
706	return SYSCALL_PTHREAD_ARGUMENT_NOT_SUPPORTED;
707	}
708
709	// get pointers in mapping
710	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
711	mapping_thread_t* thread = _get_thread_base(header);
712	mapping_vspace_t* vspace = _get_vspace_base(header);
713	mapping_cluster_t* cluster = _get_cluster_base(header);
714
715	// get scheduler for processor running the calling thread
716	static_scheduler_t* psched = (static_scheduler_t*)_get_sched();
717
718	// get calling thread local index in scheduler
719	unsigned int current = psched->current;
720
721	// get vspace index
722	unsigned int vspace_id = psched->context[current].slot[CTX_VSID_ID];
723
724	#if GIET_DEBUG_EXEC
725	unsigned int gpid = _get_procid();
726	unsigned int cluster_xy = gpid >> P_WIDTH;
727	unsigned int p = gpid & ((1<<P_WIDTH)-1);
728	unsigned int x = cluster_xy >> Y_WIDTH;
729	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
730	if ( _get_proctime() > GIET_DEBUG_EXEC )
731	_printf("\n[DEBUG EXEC] _sys_pthread_create() at cycle %d\n"
732	"P[%d,%d,%d] enters for vspace %s / entry = %x\n",
733	_get_proctime() , x , y , p , vspace[vspace_id].name , (unsigned int)function );
734	#endif
735
736	unsigned int thread_id; // searched thread : local index in mapping
737	unsigned int clusterid; // searched thread : cluster index
738	unsigned int lpid; // searched thread : processor local index
739	unsigned int ltid; // searched thread : scheduler thread index
740	unsigned int cx; // searched thread : X coordinate for searched thread
741	unsigned int cy; // searched thread : Y coordinate for searched thread
742	unsigned int entry; // searched thread : entry point
743	unsigned int norun; // searched thread : norun vector
744	unsigned int trdid; // searched thread : thread identifier
745
746	// scan threads in vspace to find an inactive thread matching function
747	unsigned int min = vspace[vspace_id].thread_offset;
748	unsigned int max = min + vspace[vspace_id].threads;
749	unsigned int found = 0;
750	for ( thread_id = min ; (thread_id < max) && (found == 0) ; thread_id++ )
751	{
752	// get thread coordinates [cx,cy,lpid] and ltid from mapping
753	ltid = thread[thread_id].ltid;
754	clusterid = thread[thread_id].clusterid;
755	lpid = thread[thread_id].proclocid;
756	cx = cluster[clusterid].x;
757	cy = cluster[clusterid].y;
758
759	// get thread scheduler pointer
760	psched = _schedulers[cx][cy][lpid];
761
762	// get thread entry-point, norun-vector, and trdid from context
763	entry = psched->context[ltid].slot[CTX_ENTRY_ID];
764	norun = psched->context[ltid].slot[CTX_NORUN_ID];
765	trdid = psched->context[ltid].slot[CTX_TRDID_ID];
766
767	// check matching
768	if ( ((unsigned int)function == entry ) &&
769	(norun & NORUN_MASK_THREAD) ) found = 1;
770
771	} // end loop on threads
772
773	if ( found ) // one matching inactive thread has been found
774	{
775	// set argument value in thread context
776	if ( arg != NULL ) psched->context[ltid].slot[CTX_A0_ID] = (unsigned int)arg;
777
778	// activate thread
779	psched->context[ltid].slot[CTX_NORUN_ID] = 0;
780
781	// return launched thead global identifier
782	*buffer = trdid;
783
784	#if GIET_DEBUG_EXEC
785	if ( _get_proctime() > GIET_DEBUG_EXEC )
786	_printf("\n[DEBUG EXEC] _sys_pthread_create() at cycle %d\n"
787	"P[%d,%d,%d] exit : thread %x launched in vspace %s\n",
788	_get_proctime() , x , y , p , trdid , vspace[vspace_id].name );
789	#endif
790	return SYSCALL_OK;
791	}
792	else // no matching thread found
793	{
794	_printf("\n[GIET ERROR] in _sys_pthread_create() : "
795	"no matching thread for entry = %x in vspace %s\n",
796	(unsigned int)function , vspace[vspace_id].name );
797
798	return SYSCALL_THREAD_NOT_FOUND;
799	}
800
801	} // end _sys_pthread_create()
802
803
804	///////////////////////////////////////////
805	int _sys_pthread_join( unsigned int trdid,
806	void* ptr )
807	{
808	// ptr argument not supported
809	if ( ptr != NULL )
810	{
811	_printf("\n[GIET ERROR] in _sys_pthread_join() : "
812	"ptr argument not supported, must be NULL\n" );
813
814	return SYSCALL_PTHREAD_ARGUMENT_NOT_SUPPORTED;
815	}
816
817	// get calling thread vspace
818	unsigned int caller_vspace = _get_context_slot( CTX_VSID_ID );
819
820	#if GIET_DEBUG_EXEC
821	unsigned int gpid = _get_procid();
822	unsigned int cluster_xy = gpid >> P_WIDTH;
823	unsigned int p = gpid & ((1<<P_WIDTH)-1);
824	unsigned int x = cluster_xy >> Y_WIDTH;
825	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
826	if ( _get_proctime() > GIET_DEBUG_EXEC )
827	_printf("\n[DEBUG EXEC] _sys_pthread_join() at cycle %d\n"
828	"P[%d,%d,%d] enters for thread %x in vspace %d\n",
829	_get_proctime() , x , y , p , trdid , caller_vspace );
830	#endif
831
832	// get target thread indexes from trdid
833	unsigned int cx = (trdid>>24) & 0xFF;
834	unsigned int cy = (trdid>>16) & 0xFF;
835	unsigned int lpid = (trdid>>8 ) & 0xFF;
836	unsigned int ltid = (trdid ) & 0xFF;
837
838	// get target thread scheduler, vspace and registered trdid
839	static_scheduler_t* psched = _schedulers[cx][cy][lpid];
840	unsigned int target_vspace = psched->context[ltid].slot[CTX_VSID_ID];
841	unsigned int registered_trdid = psched->context[ltid].slot[CTX_TRDID_ID];
842
843	// check trdid
844	if ( trdid != registered_trdid )
845	{
846	_printf("\nerror in _sys_pthread_join() : "
847	"trdid = %x / registered_trdid = %x\n",
848	trdid , registered_trdid );
849
850	return SYSCALL_UNCOHERENT_THREAD_CONTEXT;
851	}
852
853	// check calling thread and target thread in same vspace
854	if ( caller_vspace != target_vspace )
855	{
856	_printf("\n[GIET ERROR] in _sys_pthread_join() : "
857	" calling thread and target thread not in same vspace\n");
858
859	return SYSCALL_NOT_IN_SAME_VSPACE;
860	}
861
862	// get target thread state
863	unsigned int* pnorun = &psched->context[ltid].slot[CTX_NORUN_ID];
864
865	asm volatile ( "2000: \n"
866	"move $11, %0 \n" /* $11 <= pnorun */
867	"lw $11, 0($11) \n" /* $11 <= norun */
868	"andi $11, $11, 1 \n" /* $11 <= norun & 0x1 */
869	"beqz $11, 2000b \n"
870	:
871	: "r" (pnorun)
872	: "$11" );
873
874	#if GIET_DEBUG_EXEC
875	if ( _get_proctime() > GIET_DEBUG_EXEC )
876	_printf("\n[DEBUG EXEC] _sys_pthread_join() at cycle %d\n"
877	"P[%d,%d,%d] exit for thread %x in vspace %d\n",
878	_get_proctime() , x , y , p , trdid , caller_vspace );
879	#endif
880
881	return SYSCALL_OK;
882
883	} // end _sys_pthread_join()
884
885
886	////////////////////////////////////////
887	int _sys_pthread_kill( pthread_t trdid,
888	int signal )
889	{
890	// get calling thread vspace
891	unsigned int caller_vspace = _get_context_slot( CTX_VSID_ID );
892
893	#if GIET_DEBUG_EXEC
894	unsigned int gpid = _get_procid();
895	unsigned int cluster_xy = gpid >> P_WIDTH;
896	unsigned int p = gpid & ((1<<P_WIDTH)-1);
897	unsigned int x = cluster_xy >> Y_WIDTH;
898	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
899	if ( _get_proctime() > GIET_DEBUG_EXEC )
900	_printf("\n[DEBUG EXEC] _sys_pthread_kill() at cycle %d\n"
901	"P[%d,%d,%d] enters for thread %x in vspace %d\n",
902	_get_proctime() , x , y , p , trdid , caller_vspace );
903	#endif
904
905
906	// get and check target thread indexes from trdid
907	unsigned int cx = (trdid>>24) & 0xFF;
908	unsigned int cy = (trdid>>16) & 0xFF;
909	unsigned int lpid = (trdid>>8 ) & 0xFF;
910	unsigned int ltid = (trdid ) & 0xFF;
911
912	// get target thread scheduler, vspace and registered trdid
913	static_scheduler_t* psched = _schedulers[cx][cy][lpid];
914	unsigned int target_vspace = psched->context[ltid].slot[CTX_VSID_ID];
915	unsigned int registered_trdid = psched->context[ltid].slot[CTX_TRDID_ID];
916
917	// check trdid
918	if ( trdid != registered_trdid )
919	{
920	_printf("\n[GIET ERROR] in _sys_pthread_kill() : trdid = %x"
921	" / registered_trdid = %x\n", trdid , registered_trdid );
922	return SYSCALL_UNCOHERENT_THREAD_CONTEXT;
923	}
924
925	// check calling thread and target thread in same vspace
926	if ( caller_vspace != target_vspace )
927	{
928	_printf("\n[GIET ERROR] in _sys_pthread_kill() : not in same vspace\n");
929	return SYSCALL_NOT_IN_SAME_VSPACE;
930	}
931
932	// register KILL signal in target thread context if required
933	if ( signal )
934	{
935	_atomic_or( &psched->context[ltid].slot[CTX_SIGS_ID] , SIGS_MASK_KILL );
936	}
937
938	#if GIET_DEBUG_EXEC
939	if ( _get_proctime() > GIET_DEBUG_EXEC )
940	_printf("\n[DEBUG EXEC] _sys_pthread_kill() at cycle %d\n"
941	"P[%d,%d,%d] exit for thread %x in vspace %d\n",
942	_get_proctime() , x , y , p , trdid , caller_vspace );
943	#endif
944
945	return SYSCALL_OK;
946
947	} // end _sys_pthread_kill()
948
949
950	/////////////////////////////////////
951	int _sys_pthread_exit( void* string )
952	{
953	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
954	mapping_vspace_t * vspace = _get_vspace_base(header);
955
956	unsigned int ltid = _get_context_slot(CTX_LTID_ID);
957	unsigned int trdid = _get_context_slot(CTX_TRDID_ID);
958	unsigned int vsid = _get_context_slot(CTX_VSID_ID);
959
960	// print exit message
961	if ( string == NULL )
962	{
963	_printf("\n[GIET WARNING] Exit thread %x in application %s\n",
964	trdid , vspace[vsid].name );
965	}
966	else
967	{
968	_printf("\n[GIET WARNING] Exit thread %x in vspace %s\n"
969	" Cause : %s\n\n",
970	trdid , vspace[vsid].name , (char*) string );
971	}
972
973	// get scheduler pointer for calling thread
974	static_scheduler_t* psched = (static_scheduler_t*)_get_sched();
975
976	// register KILL signal in calling thread context (suicid request)
977	_atomic_or( &psched->context[ltid].slot[CTX_SIGS_ID] , SIGS_MASK_KILL );
978
979	// deschedule calling thread
980	unsigned int save_sr;
981	_it_disable( &save_sr );
982
983	_ctx_switch();
984
985	return SYSCALL_OK;
986
987	} // end _sys_pthread_exit()
988
989	////////////////////////
990	int _sys_pthread_yield()
991	{
992	unsigned int save_sr;
993
994	_it_disable( &save_sr );
995	_ctx_switch();
996	_it_restore( &save_sr );
997
998	return SYSCALL_OK;
999	}
1000
1001	//////////////////////////////////////////////////
1002	int _sys_pthread_control( unsigned int command,
1003	char* vspace_name,
1004	char* thread_name )
1005	{
1006
1007	#if GIET_DEBUG_EXEC
1008	unsigned int gpid = _get_procid();
1009	unsigned int cluster_xy = gpid >> P_WIDTH;
1010	unsigned int p = gpid & ((1<<P_WIDTH)-1);
1011	unsigned int x = cluster_xy >> Y_WIDTH;
1012	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1013	if ( _get_proctime() > GIET_DEBUG_EXEC )
1014	_printf("\n[DEBUG EXEC] _sys_pthread_control() at cycle %d\n"
1015	"P[%d,%d,%d] enter for vspace %s / thread %s / command = %d\n",
1016	_get_proctime() , x , y , p , vspace_name, thread_name, command );
1017	#endif
1018
1019	// get pointers in mapping
1020	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1021	mapping_thread_t* thread = _get_thread_base(header);
1022	mapping_vspace_t* vspace = _get_vspace_base(header);
1023	mapping_cluster_t* cluster = _get_cluster_base(header);
1024
1025	unsigned int found;
1026
1027	// search vspace name to get vspace index: vsid
1028	found = 0;
1029	unsigned int vsid;
1030	for( vsid = 0 ; vsid < header->vspaces ; vsid++ )
1031	{
1032	if ( _strcmp( vspace[vsid].name, vspace_name ) == 0 )
1033	{
1034	found = 1;
1035	break;
1036	}
1037	}
1038
1039	if ( found == 0 ) return SYSCALL_VSPACE_NOT_FOUND;
1040
1041	// search thread name in vspace to get thread index: tid
1042	found = 0;
1043	unsigned int tid;
1044	unsigned int min = vspace[vsid].thread_offset;
1045	unsigned int max = min + vspace[vsid].threads;
1046	for( tid = min ; tid < max ; tid++ )
1047	{
1048	if ( _strcmp( thread[tid].name, thread_name ) == 0 )
1049	{
1050	found = 1;
1051	break;
1052	}
1053	}
1054
1055	if ( found == 0 ) return SYSCALL_THREAD_NOT_FOUND;
1056
1057	// get target thread coordinates
1058	unsigned int cid = thread[tid].clusterid;
1059	unsigned int cx = cluster[cid].x;
1060	unsigned int cy = cluster[cid].y;
1061	unsigned int cp = thread[tid].proclocid;
1062	unsigned int ltid = thread[tid].ltid;
1063
1064	// get target thread scheduler
1065	static_scheduler_t* psched = _schedulers[cx][cy][cp];
1066
1067	// check trdid and vsid
1068	unsigned int trdid = cx<<24 \| cy<<16 \| cp<<8 \| ltid;
1069	if ( (psched->context[ltid].slot[CTX_TRDID_ID] != trdid) \|\|
1070	(psched->context[ltid].slot[CTX_VSID_ID] != vsid) )
1071	{
1072	return SYSCALL_UNCOHERENT_THREAD_CONTEXT;
1073	}
1074
1075	// execute command
1076	if ( command == THREAD_CMD_PAUSE )
1077	{
1078	_atomic_or ( &psched->context[ltid].slot[CTX_NORUN_ID], NORUN_MASK_THREAD );
1079	return SYSCALL_OK;
1080	}
1081	else if ( command == THREAD_CMD_RESUME )
1082	{
1083	_atomic_and( &psched->context[ltid].slot[CTX_NORUN_ID], ~NORUN_MASK_THREAD );
1084	return SYSCALL_OK;
1085	}
1086	else if ( command == THREAD_CMD_CONTEXT )
1087	{
1088	_user_printf( " - CTX_TRDID = %x\n"
1089	" - CTX_VSID = %x\n"
1090	" - CTX_EPC = %x\n"
1091	" - CTX_PTAB = %x\n"
1092	" - CTX_PTPR = %x\n"
1093	" - CTX_SR = %x\n"
1094	" - CTX_RA = %x\n"
1095	" - CTX_SP = %x\n"
1096	" - CTX_ENTRY = %x\n"
1097	" - CTX_NORUN = %x\n"
1098	" - CTX_SIGS = %x\n"
1099	" - CTX_LOCKS = %x\n"
1100	" - CTX_TTY = %x\n"
1101	" - CTX_NIC_RX = %x\n"
1102	" - CTX_NIC_TX = %x\n"
1103	" - CTX_CMA_RX = %x\n"
1104	" - CTX_CMA_TX = %x\n"
1105	" - CTX_CMA_FB = %x\n",
1106	psched->context[ltid].slot[CTX_TRDID_ID],
1107	psched->context[ltid].slot[CTX_VSID_ID],
1108	psched->context[ltid].slot[CTX_EPC_ID],
1109	psched->context[ltid].slot[CTX_PTAB_ID],
1110	psched->context[ltid].slot[CTX_PTPR_ID],
1111	psched->context[ltid].slot[CTX_SR_ID],
1112	psched->context[ltid].slot[CTX_RA_ID],
1113	psched->context[ltid].slot[CTX_SP_ID],
1114	psched->context[ltid].slot[CTX_ENTRY_ID],
1115	psched->context[ltid].slot[CTX_NORUN_ID],
1116	psched->context[ltid].slot[CTX_SIGS_ID],
1117	psched->context[ltid].slot[CTX_LOCKS_ID],
1118	psched->context[ltid].slot[CTX_TTY_ID],
1119	psched->context[ltid].slot[CTX_NIC_RX_ID],
1120	psched->context[ltid].slot[CTX_NIC_TX_ID],
1121	psched->context[ltid].slot[CTX_CMA_RX_ID],
1122	psched->context[ltid].slot[CTX_CMA_TX_ID],
1123	psched->context[ltid].slot[CTX_CMA_FB_ID] );
1124	return SYSCALL_OK;
1125	}
1126	else
1127	{
1128	return SYSCALL_ILLEGAL_THREAD_COMMAND_TYPE;
1129	}
1130
1131	} // end _sys_pthread_control()
1132
1133
1134
1135
1136	//////////////////////////////////////////////////////////////////////////////
1137	// Coprocessors related syscall handlers
1138	//////////////////////////////////////////////////////////////////////////////
1139
1140	//////////////////////////////////////////////////
1141	int _sys_coproc_alloc( unsigned int cluster_xy,
1142	unsigned int coproc_type,
1143	unsigned int* return_info )
1144	{
1145	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1146	mapping_cluster_t * cluster = _get_cluster_base(header);
1147	mapping_periph_t * periph = _get_periph_base(header);
1148
1149	// compute cluster coordinates and cluster index in mapping
1150	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1151	unsigned int x = (cluster_xy>>Y_WIDTH) & ((1<<X_WIDTH)-1);
1152	unsigned int cluster_id = x * Y_SIZE + y;
1153
1154	// search coprocessor in cluster
1155	mapping_periph_t* found = NULL;
1156	unsigned int min = cluster[cluster_id].periph_offset;
1157	unsigned int max = min + cluster[cluster_id].periphs;
1158	unsigned int periph_id;
1159	for ( periph_id = min ; periph_id < max ; periph_id++ )
1160	{
1161	if ( (periph[periph_id].type == PERIPH_TYPE_MWR) &&
1162	(periph[periph_id].subtype == coproc_type) )
1163	{
1164	found = &periph[periph_id];
1165	break;
1166	}
1167	}
1168
1169	if ( found != NULL )
1170	{
1171	// get the lock
1172	_simple_lock_acquire( &_coproc_lock[cluster_id] );
1173
1174	// register coproc characteristics in kernel arrays
1175	_coproc_type[cluster_id] = coproc_type;
1176	_coproc_info[cluster_id] = (found->arg0 & 0xFF) \|
1177	(found->arg1 & 0xFF)<<8 \|
1178	(found->arg2 & 0xFF)<<16 \|
1179	(found->arg3 & 0xFF)<<24 ;
1180
1181	// returns coprocessor info
1182	*return_info = _coproc_info[cluster_id];
1183
1184	#if GIET_DEBUG_COPROC
1185	_printf("\n[DEBUG COPROC] _sys_coproc_alloc() at cycle %d\n"
1186	"type = %d in cluster[%d,%d] / coproc_info = %x\n",
1187	_get_proctime() , coproc_type, x , y , *return_info );
1188	#endif
1189	return SYSCALL_OK;
1190	}
1191	else
1192	{
1193	_printf("\n[GIET_ERROR] in _sys_coproc_alloc(): "
1194	"no coprocessor with type %d in cluster[%d,%d]\n",
1195	coproc_type , x , y );
1196
1197	return SYSCALL_COPROCESSOR_NOT_FOUND;
1198	}
1199	} // end _sys_coproc_alloc()
1200
1201	////////////////////////////////////////////////////////
1202	int _sys_coproc_release( unsigned int cluster_xy,
1203	unsigned int coproc_type )
1204	{
1205	// compute cluster coordinates and cluster index
1206	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1207	unsigned int x = (cluster_xy>>Y_WIDTH) & ((1<<X_WIDTH)-1);
1208	unsigned int cluster_id = x * Y_SIZE + y;
1209
1210	// check coprocessor type
1211	if ( _coproc_type[cluster_id] != coproc_type )
1212	{
1213	_printf("\n[GIET_ERROR] in _sys_coproc_release(): "
1214	"no coprocessor of type %d allocated in cluster[%d,%d]\n",
1215	coproc_type, x , y );
1216
1217	return SYSCALL_COPROCESSOR_NON_ALLOCATED;
1218	}
1219
1220	unsigned int info = _coproc_info[cluster_id];
1221	unsigned int nb_to = info & 0xFF;
1222	unsigned int nb_from = (info>>8) & 0xFF;
1223	unsigned int channel;
1224
1225	// stops coprocessor and communication channels
1226	_mwr_set_coproc_register( cluster_xy , 0 , 0 );
1227	for ( channel = 0 ; channel < (nb_from + nb_to) ; channel++ )
1228	{
1229	_mwr_set_channel_register( cluster_xy , channel , MWR_CHANNEL_RUNNING , 0 );
1230	}
1231
1232	// release coprocessor lock
1233	_simple_lock_release( &_coproc_lock[cluster_id] );
1234
1235	#if GIET_DEBUG_COPROC
1236	_printf("\n[DEBUG COPROC] _sys_coproc_release() at cycle %d\n"
1237	"type = %d in cluster[%d,%d]\n",
1238	_get_proctime() , coproc_type , x , y );
1239	#endif
1240
1241	return SYSCALL_OK;
1242	} // end _sys_coproc_release()
1243
1244	////////////////////////////////////////////////////////////////
1245	int _sys_coproc_channel_init( unsigned int cluster_xy,
1246	unsigned int coproc_type,
1247	unsigned int channel,
1248	giet_coproc_channel_t* desc )
1249	{
1250	// compute cluster coordinates and cluster index
1251	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1252	unsigned int x = (cluster_xy>>Y_WIDTH) & ((1<<X_WIDTH)-1);
1253	unsigned int cluster_id = x * Y_SIZE + y;
1254
1255	// check coprocessor type
1256	if ( _coproc_type[cluster_id] != coproc_type )
1257	{
1258	_printf("\n[GIET_ERROR] in _sys_coproc_release(): "
1259	"no coprocessor of type %d allocated in cluster[%d,%d]\n",
1260	coproc_type, x , y );
1261
1262	return SYSCALL_COPROCESSOR_NON_ALLOCATED;
1263	}
1264
1265	// check channel mode
1266	unsigned mode = desc->channel_mode;
1267	if ( (mode != MODE_MWMR) &&
1268	(mode != MODE_DMA_IRQ) &&
1269	(mode != MODE_DMA_NO_IRQ) )
1270	{
1271	_printf("\n[GIET_ERROR] in _sys_coproc_channel_init(): "
1272	"illegal mode\n");
1273
1274	return SYSCALL_COPROCESSOR_ILLEGAL_MODE;
1275	}
1276
1277	// get memory buffer size
1278	unsigned int size = desc->buffer_size;
1279
1280	// physical addresses
1281	unsigned long long buffer_paddr;
1282	unsigned int buffer_lsb;
1283	unsigned int buffer_msb;
1284	unsigned long long status_paddr = 0;
1285	unsigned int status_lsb;
1286	unsigned int status_msb;
1287	unsigned long long lock_paddr = 0;
1288	unsigned int lock_lsb;
1289	unsigned int lock_msb;
1290
1291	unsigned int flags; // unused
1292
1293	// compute memory buffer physical address
1294	buffer_paddr = _v2p_translate( desc->buffer_vaddr , &flags );
1295	buffer_lsb = (unsigned int)buffer_paddr;
1296	buffer_msb = (unsigned int)(buffer_paddr>>32);
1297
1298	// call MWMR_DMA driver
1299	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_MODE, mode );
1300	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_SIZE, size );
1301	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_BUFFER_LSB, buffer_lsb );
1302	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_BUFFER_MSB, buffer_msb );
1303
1304	if ( mode == MODE_MWMR )
1305	{
1306	// compute MWMR descriptor physical address
1307	status_paddr = _v2p_translate( desc->status_vaddr , &flags );
1308	status_lsb = (unsigned int)status_paddr;
1309	status_msb = (unsigned int)(status_paddr>>32);
1310
1311	// call MWMR_DMA driver
1312	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_MWMR_LSB, status_lsb );
1313	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_MWMR_MSB, status_msb );
1314
1315	// compute lock physical address
1316	lock_paddr = _v2p_translate( desc->lock_vaddr , &flags );
1317	lock_lsb = (unsigned int)lock_paddr;
1318	lock_msb = (unsigned int)(lock_paddr>>32);
1319
1320	// call MWMR_DMA driver
1321	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_LOCK_LSB, lock_lsb );
1322	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_LOCK_MSB, lock_msb );
1323	}
1324
1325	#if GIET_DEBUG_COPROC
1326	_printf("\n[DEBUG COPROC] _sys_coproc_channel_init() at cycle %d\n"
1327	"cluster[%d,%d] / channel = %d / mode = %d / buffer_size = %d\n"
1328	"buffer_vaddr = %x / status_vaddr = %x / lock_vaddr = %x\n"
1329	"buffer_paddr = %l / status_paddr = %l / lock_paddr = %l\n",
1330	_get_proctime() , x , y , channel , mode , size ,
1331	desc->buffer_vaddr, desc->status_vaddr, desc->lock_vaddr,
1332	buffer_paddr, status_paddr, lock_paddr );
1333	#endif
1334
1335	return SYSCALL_OK;
1336	} // end _sys_coproc_channel_init()
1337
1338	//////////////////////////////////////////////
1339	int _sys_coproc_run( unsigned int cluster_xy,
1340	unsigned int coproc_type )
1341	{
1342	// compute cluster coordinates and cluster index
1343	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1344	unsigned int x = (cluster_xy>>Y_WIDTH) & ((1<<X_WIDTH)-1);
1345	unsigned int cluster_id = x * Y_SIZE + y;
1346
1347	// check coprocessor type
1348	if ( _coproc_type[cluster_id] != coproc_type )
1349	{
1350	_printf("\n[GIET_ERROR] in _sys_coproc_release(): "
1351	"no coprocessor of type %d allocated in cluster[%d,%d]\n",
1352	coproc_type, x , y );
1353
1354	return SYSCALL_COPROCESSOR_NON_ALLOCATED;
1355	}
1356
1357	unsigned int info = _coproc_info[cluster_id];
1358	unsigned int nb_to = info & 0xFF;
1359	unsigned int nb_from = (info>>8) & 0xFF;
1360	unsigned int mode = 0xFFFFFFFF;
1361	unsigned int channel;
1362
1363	// check channels modes, and register coprocessor running mode
1364	for ( channel = 0 ; channel < (nb_from + nb_to) ; channel++ )
1365	{
1366	unsigned int temp;
1367	temp = _mwr_get_channel_register( cluster_xy , channel , MWR_CHANNEL_MODE );
1368
1369	if ( mode == 0xFFFFFFFF )
1370	{
1371	mode = temp;
1372	}
1373	else if ( temp != mode )
1374	{
1375	_printf("\n[GIET_ERROR] in _sys_coproc_run(): "
1376	"channels don't have same mode in coprocessor[%d,%d]\n", x , y );
1377
1378	return SYSCALL_COPROCESSOR_ILLEGAL_MODE;
1379	}
1380	}
1381	_coproc_mode[cluster_id] = mode;
1382
1383	// start all communication channels
1384	for ( channel = 0 ; channel < (nb_from + nb_to) ; channel++ )
1385	{
1386	_mwr_set_channel_register( cluster_xy , channel , MWR_CHANNEL_RUNNING , 1 );
1387	}
1388
1389	//////////////////////////////////////////////////////////////////////////
1390	if ( (mode == MODE_MWMR) \|\| (mode == MODE_DMA_NO_IRQ) ) // no descheduling
1391	{
1392	// start coprocessor
1393	_mwr_set_coproc_register( cluster_xy , 0 , 1 );
1394
1395	#if GIET_DEBUG_COPROC
1396	if ( mode == MODE_MWMR )
1397	_printf("\n[DEBUG COPROC] _sys_coproc_run() at cycle %d\n"
1398	"type = %d / cluster[%d,%d] / MODE_MWMR\n",
1399	_get_proctime() , coproc_type , x , y );
1400	else
1401	_printf("\n[DEBUG COPROC] _sys_coproc_run() at cycle %d\n"
1402	"type = %d / cluster[%d,%d] / MODE_DMA_NO_IRQ\n",
1403	_get_proctime() , coproc_type , x , y );
1404	#endif
1405
1406	return SYSCALL_OK;
1407	}
1408	///////////////////////////////////////////////////////////////////////////
1409	else // mode == MODE_DMA_IRQ => descheduling
1410	{
1411	// register calling thread trdid
1412	unsigned int trdid = _get_thread_trdid();
1413	_coproc_trdid[cluster_id] = trdid;
1414
1415	// enters critical section
1416	unsigned int save_sr;
1417	_it_disable( &save_sr );
1418
1419	// set NORUN_MASK_COPROC bit
1420	static_scheduler_t* psched = _get_sched();
1421	unsigned int ltid = _get_thread_ltid();
1422	unsigned int* ptr = &psched->context[ltid].slot[CTX_NORUN_ID];
1423	_atomic_or( ptr , NORUN_MASK_COPROC );
1424
1425	// start coprocessor
1426	_mwr_set_coproc_register( cluster_xy , 0 , 1 );
1427
1428	#if GIET_DEBUG_COPROC
1429	_printf("\n[DEBUG COPROC] _sys_coproc_run() at cycle %d\n"
1430	"thread %x starts coprocessor / type = %d / cluster[%d,%d] / MODE_DMA_IRQ\n",
1431	_get_proctime() , trdid , coproc_type , x , y );
1432	#endif
1433
1434	// deschedule thread
1435	_ctx_switch();
1436
1437	#if GIET_DEBUG_COPROC
1438	_printf("\n[DEBUG COPROC] _sys_coproc_run() at cycle %d\n"
1439	"thread %x resume after coprocessor[%d,%d] completion\n",
1440	_get_proctime() , trdid , x , y );
1441	#endif
1442
1443	// restore SR
1444	_it_restore( &save_sr );
1445
1446	// return error computed by mwr_isr()
1447	return _coproc_error[cluster_id];
1448	}
1449	} // end _sys_coproc_run()
1450
1451	////////////////////////////////////////////////////
1452	int _sys_coproc_completed( unsigned int cluster_xy,
1453	unsigned int coproc_type )
1454	{
1455	// compute cluster coordinates and cluster index
1456	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1457	unsigned int x = (cluster_xy>>Y_WIDTH) & ((1<<X_WIDTH)-1);
1458	unsigned int cluster_id = x * Y_SIZE + y;
1459
1460	// check coprocessor type
1461	if ( _coproc_type[cluster_id] != coproc_type )
1462	{
1463	_printf("\n[GIET_ERROR] in _sys_coproc_release(): "
1464	"no coprocessor of type %d allocated in cluster[%d,%d]\n",
1465	coproc_type, x , y );
1466
1467	return SYSCALL_COPROCESSOR_NON_ALLOCATED;
1468	}
1469
1470	unsigned int mode = _coproc_mode[cluster_id];
1471
1472	// analyse possible errors
1473	if ( mode == MODE_DMA_NO_IRQ )
1474	{
1475	unsigned int info = _coproc_info[cluster_id];
1476	unsigned int nb_to = info & 0xFF;
1477	unsigned int nb_from = (info>>8) & 0xFF;
1478	unsigned int error = 0;
1479	unsigned int channel;
1480	unsigned int status;
1481
1482	// get status for all channels, and signal reported errors
1483	for ( channel = 0 ; channel < (nb_to +nb_from) ; channel++ )
1484	{
1485	do
1486	{
1487	status = _mwr_get_channel_register( cluster_xy, channel,
1488	MWR_CHANNEL_STATUS );
1489	if ( status == MWR_CHANNEL_ERROR_DATA )
1490	{
1491	_printf("\n[GIET_ERROR] in _sys_coproc_completed(): "
1492	"channel %d / DATA_ERROR\n", channel );
1493	error = 1;
1494	}
1495	else if ( status == MWR_CHANNEL_ERROR_LOCK )
1496	{
1497	_printf("\n[GIET_ERROR] in _sys_coproc_completed()"
1498	" / channel %d / LOCK_ERROR\n", channel );
1499	error = 1;
1500	}
1501	else if ( status == MWR_CHANNEL_ERROR_DESC )
1502	{
1503	_printf("\n[GIET_ERROR] in _sys_coproc_completed()"
1504	" / channel %d / DESC_ERROR\n", channel );
1505	error = 1;
1506	}
1507	}
1508	while ( status == MWR_CHANNEL_BUSY );
1509
1510	// reset channel
1511	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_RUNNING , 0 );
1512
1513	} // end for channels
1514
1515	if ( error )
1516	{
1517	return SYSCALL_COPROCESSOR_ILLEGAL_MODE;
1518	}
1519	else
1520	{
1521
1522	#if GIET_DEBUG_COPROC
1523	_printf("\n[DEBUG COPROC] _sys_coproc_completed() at cycle %d\n"
1524	"coprocessor type = %d / cluster[%d,%d] completes operation for thread %d\n",
1525	_get_proctime() , coproc_type , x , y , _get_thread_trdid() );
1526	#endif
1527	return SYSCALL_OK;
1528	}
1529	}
1530	else // mode == MODE_MWMR or MODE_DMA_IRQ
1531	{
1532	_printf("\n[GIET ERROR] in sys_coproc_completed(): "
1533	"coprocessor[%d,%d] is not running in MODE_DMA_NO_IRQ\n", x , y );
1534
1535	return SYSCALL_COPROCESSOR_ILLEGAL_MODE;
1536	}
1537	} // end _sys_coproc_completed()
1538
1539
1540	//////////////////////////////////////////////////////////////////////////////
1541	// TTY related syscall handlers
1542	//////////////////////////////////////////////////////////////////////////////
1543
1544	/////////////////////////////////////////
1545	int _sys_tty_alloc( unsigned int shared )
1546	{
1547	unsigned int channel; // allocated TTY channel
1548
1549	// get trdid and vsid for the calling thread
1550	unsigned int vsid = _get_context_slot( CTX_VSID_ID );
1551	unsigned int trdid = _get_thread_trdid();
1552
1553	mapping_header_t header = (mapping_header_t )SEG_BOOT_MAPPING_BASE;
1554	mapping_vspace_t *vspace = _get_vspace_base(header);
1555	mapping_thread_t *thread = _get_thread_base(header);
1556
1557	// compute number of users
1558	unsigned int users;
1559	if ( shared ) users = vspace[vsid].threads;
1560	else users = 1;
1561
1562	// get a TTY channel
1563	for ( channel = 0 ; channel < NB_TTY_CHANNELS ; channel++ )
1564	{
1565	unsigned int* palloc = &_tty_channel_alloc[channel];
1566
1567	if ( _atomic_test_and_set( palloc , users ) == 0 ) break;
1568	}
1569	if ( channel >= NB_TTY_CHANNELS )
1570	{
1571	_printf("\n[GIET_ERROR] in _sys_tty_alloc() : "
1572	"no TTY channel available for thread %x\n", trdid );
1573	return SYSCALL_NO_CHANNEL_AVAILABLE;
1574	}
1575
1576	// initialise allocated TTY channel
1577	_tty_init( channel );
1578
1579	// allocate a WTI mailbox to the calling proc if external IRQ
1580	unsigned int wti_id;
1581	if ( USE_PIC ) _ext_irq_alloc( ISR_TTY_RX , channel , &wti_id );
1582
1583	// register wti_id and coordinates for processor receiving WTI
1584	unsigned int procid = _get_procid();
1585	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
1586	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
1587	unsigned int p = procid & ((1<<P_WIDTH)-1);
1588	_tty_channel_wti[channel] = x<<24 \| y<<16 \| p<<8 \| wti_id;
1589
1590	// update CTX_TTY_ID
1591	if ( shared ) // for all threads in vspace
1592	{
1593	// scan threads in vspace
1594	unsigned int tid;
1595	for (tid = vspace[vsid].thread_offset;
1596	tid < (vspace[vsid].thread_offset + vspace[vsid].threads);
1597	tid++)
1598	{
1599	unsigned int y_size = header->y_size;
1600	unsigned int cid = thread[tid].clusterid;
1601	unsigned int x = cid / y_size;
1602	unsigned int y = cid % y_size;
1603	unsigned int p = thread[tid].proclocid;
1604	unsigned int ltid = thread[tid].ltid;
1605	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
1606
1607	psched->context[ltid].slot[CTX_TTY_ID] = channel;
1608	}
1609	}
1610	else // for calling thread only
1611	{
1612	_set_context_slot( CTX_TTY_ID, channel );
1613	}
1614
1615	return SYSCALL_OK;
1616	} // end _sys_tty_alloc()
1617
1618	//////////////////////
1619	int _sys_tty_release() // NOTE: not a syscall: used by _ctx_kill_thread()
1620	{
1621	unsigned int channel = _get_context_slot( CTX_TTY_ID );
1622
1623	if ( channel == -1 )
1624	{
1625	unsigned int trdid = _get_thread_trdid();
1626	_printf("\n[GIET_ERROR] in _sys_tty_release() : "
1627	"TTY channel already released for thread %x\n", trdid );
1628
1629	return SYSCALL_CHANNEL_ALREADY_ALLOCATED;
1630	}
1631
1632	// reset CTX_TTY_ID for the calling thread
1633	_set_context_slot( CTX_TTY_ID , 0xFFFFFFFF );
1634
1635	// atomically decrement the _tty_channel_allocator[] array
1636	_atomic_increment( &_tty_channel_alloc[channel] , -1 );
1637
1638	// release WTI mailbox if TTY channel no more used
1639	if ( USE_PIC && (_tty_channel_alloc[channel] == 0) )
1640	{
1641	_ext_irq_release( ISR_TTY_RX , channel );
1642	}
1643
1644	return SYSCALL_OK;
1645	} // end sys_tty_release()
1646
1647	////////////////////////////////////////
1648	int _sys_tty_write( const char* buffer,
1649	unsigned int length, // number of characters
1650	unsigned int channel) // channel index
1651	{
1652	unsigned int nwritten;
1653
1654	// compute and check tty channel
1655	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
1656
1657	if( channel >= NB_TTY_CHANNELS )
1658	{
1659	_printf("\n[GIET_ERROR] in _sys_tty_write() : "
1660	"no TTY channel allocated for thread %x\n", _get_thread_trdid() );
1661
1662	return SYSCALL_CHANNEL_NON_ALLOCATED;
1663	}
1664
1665	// write string to TTY channel
1666	for (nwritten = 0; nwritten < length; nwritten++)
1667	{
1668	// check tty's status
1669	if ( _tty_get_register( channel, TTY_STATUS ) & 0x2 ) break;
1670
1671	// write one byte
1672	if (buffer[nwritten] == '\n')
1673	{
1674	_tty_set_register( channel, TTY_WRITE, (unsigned int)'\r' );
1675	}
1676	_tty_set_register( channel, TTY_WRITE, (unsigned int)buffer[nwritten] );
1677	}
1678
1679	return nwritten;
1680	}
1681
1682	///////////////////////////////////////
1683	int _sys_tty_read( char* buffer,
1684	unsigned int length, // unused
1685	unsigned int channel) // channel index
1686	{
1687	// compute and check tty channel
1688	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
1689
1690	if( channel >= NB_TTY_CHANNELS )
1691	{
1692	_printf("\n[GIET_ERROR] in _sys_tty_read() : "
1693	"no TTY channel allocated for thread %x\n", _get_thread_trdid() );
1694
1695	return SYSCALL_CHANNEL_NON_ALLOCATED;
1696	}
1697
1698	unsigned int save_sr;
1699	unsigned int found = 0;
1700
1701	// get pointer on TTY_RX FIFO
1702	tty_fifo_t* fifo = &_tty_rx_fifo[channel];
1703
1704	// try to read one character from FIFO
1705	// blocked in while loop until success
1706	while ( found == 0 )
1707	{
1708	if ( fifo->sts == 0) // FIFO empty => deschedule
1709	{
1710	// enters critical section
1711	_it_disable( &save_sr );
1712
1713	// set NORUN_MASK_TTY bit for calling thread
1714	static_scheduler_t* psched = (static_scheduler_t*)_get_sched();
1715	unsigned int ltid = psched->current;
1716	_atomic_or( &psched->context[ltid].slot[CTX_NORUN_ID] , NORUN_MASK_TTY );
1717
1718	// register descheduling thread trdid
1719	fifo->trdid = _get_thread_trdid();
1720
1721	// deschedule calling thread
1722	_ctx_switch();
1723
1724	// exit critical section
1725	_it_restore( &save_sr );
1726	}
1727	else // FIFO not empty => get one character
1728	{
1729	*buffer = fifo->data[fifo->ptr];
1730	fifo->sts = fifo->sts - 1;
1731	fifo->ptr = (fifo->ptr + 1) % TTY_FIFO_DEPTH;
1732	found = 1;
1733	}
1734	}
1735
1736	return 1;
1737	}
1738
1739
1740
1741	//////////////////////////////////////////////////////////////////////////////
1742	// TIMER related syscall handlers
1743	//////////////////////////////////////////////////////////////////////////////
1744
1745	////////////////////
1746	int _sys_tim_alloc()
1747	{
1748
1749	#if NB_TIM_CHANNELS
1750
1751	unsigned int channel; // allocated TIMER channel
1752
1753	unsigned int trdid = _get_thread_trdid();
1754
1755	// check no TIMER already allocated to calling thread
1756	if ( _get_context_slot( CTX_TIM_ID ) < NB_TIM_CHANNELS )
1757	{
1758	_printf("\n[GIET_ERROR] in _sys_tim_alloc() : "
1759	"TIMER channel already allocated to thread %x\n", trdid );
1760
1761	return SYSCALL_CHANNEL_ALREADY_ALLOCATED;
1762	}
1763
1764	// get a TIMER channel
1765	for ( channel = 0 ; channel < NB_TIM_CHANNELS ; channel++ )
1766	{
1767	unsigned int* palloc = &_tim_channel_alloc[channel];
1768
1769	if ( _atomic_test_and_set( palloc , 1 ) == 0 ) break;
1770	}
1771	if ( channel >= NB_TIM_CHANNELS )
1772	{
1773	_printf("\n[GIET_ERROR] in _sys_tim_alloc() : "
1774	"no TIMER channel available for thread %x\n", trdid );
1775
1776	return SYSCALL_NO_CHANNEL_AVAILABLE;
1777	}
1778
1779	// allocate a WTI mailbox to the calling proc if external IRQ
1780	unsigned int wti_id;
1781	if ( USE_PIC ) _ext_irq_alloc( ISR_TIMER , channel , &wti_id );
1782
1783	// register wti_id and coordinates for processor receiving WTI
1784	unsigned int procid = _get_procid();
1785	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
1786	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
1787	unsigned int p = procid & ((1<<P_WIDTH)-1);
1788	_tim_channel_wti[channel] = x<<24 \| y<<16 \| p<<8 \| wti_id;
1789
1790	// update CTX_TIM_ID in thread context
1791	_set_context_slot( CTX_TIM_ID, channel );
1792
1793	return SYSCALL_OK;
1794
1795	#else
1796
1797	_printf("\n[GIET ERROR] in _sys_tim_alloc(): NB_TIM_CHANNELS == 0\n");
1798
1799	return SYSCALL_NO_CHANNEL_AVAILABLE;
1800
1801	#endif
1802	} // end _sys_tim_alloc()
1803
1804
1805	//////////////////////
1806	int _sys_tim_release() // NOTE: not a syscall: used by _ctx_kill_thread()
1807	{
1808
1809	#if NB_TIM_CHANNELS
1810
1811	unsigned int channel = _get_context_slot( CTX_TIM_ID );
1812
1813	if ( channel == -1 )
1814	{
1815	unsigned int trdid = _get_thread_trdid();
1816	_printf("\n[GIET_ERROR] in _sys_tim_release(): "
1817	"TIMER channel already released for thread %x\n", trdid );
1818
1819	return SYSCALL_CHANNEL_ALREADY_ALLOCATED;
1820	}
1821
1822	// reset CTX_TIM_ID for the calling thread
1823	_set_context_slot( CTX_TIM_ID , 0xFFFFFFFF );
1824
1825	// reset the _tim_channel_alloc[] array
1826	_tim_channel_alloc[channel] = 0;
1827
1828	// release WTI mailbox if TTY channel no more used
1829	if ( USE_PIC )
1830	{
1831	_ext_irq_release( PERIPH_TYPE_TIM , channel );
1832	}
1833
1834	return SYSCALL_OK;
1835
1836	#else
1837
1838	_printf("\n[GIET ERROR] in _sys_tim_release(): NB_TIM_CHANNELS = 0\n");
1839
1840	return SYSCALL_NO_CHANNEL_AVAILABLE;
1841
1842	#endif
1843	} // end _sys_tim_release()
1844
1845	/////////////////////////////////////////
1846	int _sys_tim_start( unsigned int period )
1847	{
1848
1849	#if NB_TIM_CHANNELS
1850
1851	// get timer index
1852	unsigned int channel = _get_context_slot( CTX_TIM_ID );
1853
1854	if ( channel >= NB_TIM_CHANNELS )
1855	{
1856	_printf("\n[GIET_ERROR] in _sys_tim_start(): not enough TIM channels\n");
1857
1858	return SYSCALL_NO_CHANNEL_AVAILABLE;
1859	}
1860
1861	// start timer
1862	_timer_start( channel, period );
1863
1864	return SYSCALL_OK;
1865
1866	#else
1867
1868	_printf("\n[GIET ERROR] in _sys_tim_start() : NB_TIM_CHANNELS = 0\n");
1869
1870	return SYSCALL_NO_CHANNEL_AVAILABLE;
1871
1872	#endif
1873	}
1874
1875	///////////////////
1876	int _sys_tim_stop()
1877	{
1878
1879	#if NB_TIM_CHANNELS
1880
1881	// get timer index
1882	unsigned int channel = _get_context_slot( CTX_TIM_ID );
1883
1884	if ( channel >= NB_TIM_CHANNELS )
1885	{
1886	_printf("\n[GIET_ERROR] in _sys_tim_stop() : illegal timer index\n");
1887
1888	return SYSCALL_CHANNEL_NON_ALLOCATED;
1889	}
1890
1891	// stop timer
1892	_timer_stop( channel );
1893
1894	return SYSCALL_OK;
1895
1896	#else
1897
1898	_printf("\n[GIET ERROR] in _sys_tim_stop() : NB_TIM_CHANNELS = 0\n");
1899
1900	return SYSCALL_NO_CHANNEL_AVAILABLE;
1901
1902	#endif
1903	}
1904
1905
1906	//////////////////////////////////////////////////////////////////////////////
1907	// NIC related syscall handlers
1908	//////////////////////////////////////////////////////////////////////////////
1909
1910	#define NIC_CONTAINER_SIZE 4096
1911
1912	#if NB_NIC_CHANNELS
1913
1914	////////////////////////////////////////
1915	int _sys_nic_alloc( unsigned int is_rx,
1916	unsigned int xmax,
1917	unsigned int ymax )
1918	{
1919	mapping_header_t header = (mapping_header_t )SEG_BOOT_MAPPING_BASE;
1920	mapping_vspace_t *vspace = _get_vspace_base(header);
1921	mapping_thread_t *thread = _get_thread_base(header);
1922
1923	// get calling thread trdid, vspace index, and number of threads
1924	unsigned int trdid = _get_thread_trdid();
1925	unsigned int vsid = _get_context_slot( CTX_VSID_ID );
1926	unsigned int users = vspace[vsid].threads;
1927
1928	// check xmax / ymax parameters
1929	if ( (xmax > X_SIZE) \|\| (ymax > Y_SIZE) )
1930	{
1931	_printf("\n[GIET_ERROR] in _sys_nic_alloc() "
1932	"xmax or ymax argument too large for thread %x\n", trdid );
1933
1934	return SYSCALL_ILLEGAL_ARGUMENT;
1935	}
1936
1937	////////////////////////////////////////////////////////
1938	// Step 1: get and register CMA and NIC channel index //
1939	////////////////////////////////////////////////////////
1940
1941	unsigned int nic_channel;
1942	unsigned int cma_channel;
1943	unsigned int* palloc;
1944
1945	// get a NIC_RX or NIC_TX channel
1946	for ( nic_channel = 0 ; nic_channel < NB_NIC_CHANNELS ; nic_channel++ )
1947	{
1948	if ( is_rx ) palloc = &_nic_rx_channel_alloc[nic_channel];
1949	else palloc = &_nic_tx_channel_alloc[nic_channel];
1950
1951	if ( _atomic_test_and_set( palloc , users ) == 0 ) break;
1952	}
1953	if ( (nic_channel >= NB_NIC_CHANNELS) )
1954	{
1955	_printf("\n[GIET_ERROR] in _sys_nic_alloc() : "
1956	"no NIC channel available for thread %x\n", trdid );
1957
1958	return SYSCALL_NO_CHANNEL_AVAILABLE;
1959	}
1960
1961	// get a CMA channel
1962	for ( cma_channel = 0 ; cma_channel < NB_CMA_CHANNELS ; cma_channel++ )
1963	{
1964	palloc = &_cma_channel_alloc[cma_channel];
1965
1966	if ( _atomic_test_and_set( palloc , users ) == 0 ) break;
1967	}
1968	if ( cma_channel >= NB_CMA_CHANNELS )
1969	{
1970	_printf("\n[GIET_ERROR] in _sys_nic_alloc() : "
1971	"no CMA channel available for thread %x\n", trdid );
1972	if ( is_rx ) _nic_rx_channel_alloc[nic_channel] = 0;
1973	else _nic_tx_channel_alloc[nic_channel] = 0;
1974
1975	return SYSCALL_NO_CHANNEL_AVAILABLE;
1976	}
1977
1978	#if GIET_DEBUG_NIC
1979	_printf("\n[DEBUG NIC] sys_nic_alloc() at cycle %d\n"
1980	"thread %d get nic_channel = %d / cma_channel = %d\n",
1981	_get_proctime() , trdid , nic_channel , cma_channel );
1982	#endif
1983
1984	// register nic_index and cma_index in all threads
1985	// contexts that are in the same vspace
1986	unsigned int tid;
1987	for (tid = vspace[vsid].thread_offset;
1988	tid < (vspace[vsid].thread_offset + vspace[vsid].threads);
1989	tid++)
1990	{
1991	unsigned int y_size = header->y_size;
1992	unsigned int cid = thread[tid].clusterid;
1993	unsigned int x = cid / y_size;
1994	unsigned int y = cid % y_size;
1995	unsigned int p = thread[tid].proclocid;
1996	unsigned int ltid = thread[tid].ltid;
1997	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
1998
1999	if ( is_rx )
2000	{
2001	if ( (psched->context[ltid].slot[CTX_NIC_RX_ID] < NB_NIC_CHANNELS) \|\|
2002	(psched->context[ltid].slot[CTX_CMA_RX_ID] < NB_CMA_CHANNELS) )
2003	{
2004	_printf("\n[GIET_ERROR] in _sys_nic_alloc() : "
2005	"NIC_RX or CMA_RX channel already allocated for thread %x\n", trdid );
2006	_nic_rx_channel_alloc[nic_channel] = 0;
2007	_cma_channel_alloc[cma_channel] = 0;
2008
2009	return SYSCALL_CHANNEL_ALREADY_ALLOCATED;
2010	}
2011	else
2012	{
2013	psched->context[ltid].slot[CTX_NIC_RX_ID] = nic_channel;
2014	psched->context[ltid].slot[CTX_CMA_RX_ID] = cma_channel;
2015	}
2016	}
2017	else // is_tx
2018	{
2019	if ( (psched->context[ltid].slot[CTX_NIC_TX_ID] < NB_NIC_CHANNELS) \|\|
2020	(psched->context[ltid].slot[CTX_CMA_TX_ID] < NB_CMA_CHANNELS) )
2021	{
2022	_printf("\n[GIET_ERROR] in _sys_nic_alloc() : "
2023	"NIC_TX or CMA_TX channel already allocated for thread %x\n", trdid );
2024	_nic_tx_channel_alloc[nic_channel] = 0;
2025	_cma_channel_alloc[cma_channel] = 0;
2026
2027	return SYSCALL_CHANNEL_ALREADY_ALLOCATED;
2028	}
2029	else
2030	{
2031	psched->context[ltid].slot[CTX_NIC_TX_ID] = nic_channel;
2032	psched->context[ltid].slot[CTX_CMA_TX_ID] = cma_channel;
2033	}
2034	}
2035	} // end loop on threads
2036
2037	/////////////////////////////////////////////////////////////////////////////////
2038	// Step 2: loop on all the clusters //
2039	// Allocate the kernel containers and status, compute the container and the //
2040	// status physical addresses, fill and synchronize the kernel CHBUF descriptor //
2041	/////////////////////////////////////////////////////////////////////////////////
2042
2043	// physical addresses to be registered in the CMA registers
2044	unsigned long long nic_chbuf_pbase; // NIC chbuf physical address
2045	unsigned long long ker_chbuf_pbase; // kernel chbuf physical address
2046
2047	// allocate one kernel container and one status variable per cluster in the
2048	// (xmax / ymax) mesh
2049	unsigned int cx; // cluster X coordinate
2050	unsigned int cy; // cluster Y coordinate
2051	unsigned int index; // container index in chbuf
2052	unsigned int vaddr; // virtual address
2053	unsigned long long cont_paddr; // container physical address
2054	unsigned long long sts_paddr; // container status physical address
2055
2056	unsigned int flags; // for _v2p_translate()
2057
2058	for ( cx = 0 ; cx < xmax ; cx++ )
2059	{
2060	for ( cy = 0 ; cy < ymax ; cy++ )
2061	{
2062	// compute index in chbuf
2063	index = (cx * ymax) + cy;
2064
2065	// allocate the kernel container
2066	vaddr = (unsigned int)_remote_malloc( NIC_CONTAINER_SIZE, cx, cy );
2067
2068	if ( vaddr == 0 ) // not enough kernel heap memory in cluster[cx,cy]
2069	{
2070	_printf("\n[GIET_ERROR] in _sys_nic_alloc() : "
2071	"not enough kernel heap in cluster[%d,%d]\n", cx, cy );
2072
2073	return SYSCALL_OUT_OF_KERNEL_HEAP_MEMORY;
2074	}
2075
2076	// compute container physical address
2077	cont_paddr = _v2p_translate( vaddr , &flags );
2078
2079	// checking container address alignment
2080	if ( cont_paddr & 0x3F )
2081	{
2082	_printf("\n[GIET ERROR] in _sys_nic_alloc() : "
2083	"container address in cluster[%d,%d] not aligned\n", cx, cy);
2084
2085	return SYSCALL_ADDRESS_NON_ALIGNED;
2086	}
2087
2088	#if GIET_DEBUG_NIC
2089	_printf("\n[DEBUG NIC] _sys_nic_alloc() at cycle %d\n"
2090	"thread %x allocates a container in cluster[%d,%d] / vaddr = %x / paddr = %l\n",
2091	-get_proctime() , trdid , cx , cy , vaddr, cont_paddr );
2092	#endif
2093
2094	// allocate the kernel container status
2095	// it occupies 64 bytes but only last bit is useful (1 for full and 0 for empty)
2096	vaddr = (unsigned int)_remote_malloc( 64, cx, cy );
2097
2098	if ( vaddr == 0 ) // not enough kernel heap memory in cluster[cx,cy]
2099	{
2100	_printf("\n[GIET_ERROR] in _sys_nic_alloc() : "
2101	"not enough kernel heap in cluster[%d,%d]\n", cx, cy );
2102
2103	return SYSCALL_OUT_OF_KERNEL_HEAP_MEMORY;
2104	}
2105
2106	// compute status physical address
2107	sts_paddr = _v2p_translate( vaddr , &flags );
2108
2109	// checking status address alignment
2110	if ( sts_paddr & 0x3F )
2111	{
2112	_printf("\n[GIET ERROR] in _sys_nic_alloc() : "
2113	"status address in cluster[%d,%d] not aligned\n", cx, cy);
2114
2115	return SYSCALL_ADDRESS_NON_ALIGNED;
2116	}
2117
2118	// initialize chbuf entry
2119	// The buffer descriptor has the following structure:
2120	// - the 26 LSB bits contain bits[6:31] of the buffer physical address
2121	// - the 26 following bits contain bits[6:31] of the physical address where the
2122	// buffer status is located
2123	// - the 12 MSB bits contain the common address extension of the buffer and its
2124	// status
2125	if ( is_rx )
2126	_nic_ker_rx_chbuf[nic_channel].buf_desc[index] =
2127	(unsigned long long)
2128	((sts_paddr & 0xFFFFFFFFULL) >> 6) +
2129	(((cont_paddr & 0xFFFFFFFFFFFULL) >> 6) << 26);
2130	else
2131	_nic_ker_tx_chbuf[nic_channel].buf_desc[index] =
2132	(unsigned long long)
2133	((sts_paddr & 0xFFFFFFC0ULL) >> 6) +
2134	(((cont_paddr & 0xFFFFFFFFFC0ULL) >> 6) << 26);
2135
2136	#if GIET_DEBUG_NIC
2137	_printf("\n[DEBUG NIC] _sys_nic_alloc() at cycle %d\n"
2138	"thread %x allocates a status in cluster[%d,%d] / vaddr = %x / paddr = %l\n"
2139	" descriptor = %l\n",
2140	_get_proctime() , trdid , cx , cy , vaddr, sts_paddr,
2141	(unsigned long long)((sts_paddr & 0xFFFFFFFFULL) >> 6) +
2142	(((cont_paddr & 0xFFFFFFFFFFFULL) >> 6) << 26) );
2143	#endif
2144	}
2145	}
2146
2147	// complete kernel chbuf initialisation
2148	if ( is_rx )
2149	{
2150	_nic_ker_rx_chbuf[nic_channel].xmax = xmax;
2151	_nic_ker_rx_chbuf[nic_channel].ymax = ymax;
2152	}
2153	else
2154	{
2155	_nic_ker_tx_chbuf[nic_channel].xmax = xmax;
2156	_nic_ker_tx_chbuf[nic_channel].ymax = ymax;
2157	}
2158
2159	// compute the kernel chbuf descriptor physical address
2160	if ( is_rx ) vaddr = (unsigned int)( &_nic_ker_rx_chbuf[nic_channel] );
2161	else vaddr = (unsigned int)( &_nic_ker_tx_chbuf[nic_channel] );
2162
2163	ker_chbuf_pbase = _v2p_translate( vaddr , &flags );
2164
2165	#if GIET_DEBUG_NIC
2166	_printf("\n[DEBUG NIC] _sys_nic_alloc() at cycle %d\n"
2167	"thread %x initialise kernel chbuf / vaddr = %x / paddr = %l\n",
2168	_get_proctime() , trdid , vaddr , ker_chbuf_pbase );
2169	#endif
2170
2171	// sync the kernel chbuf in L2 after write in L2
2172	_mmc_sync( ker_chbuf_pbase, sizeof( nic_chbuf_t ) );
2173
2174	///////////////////////////////////////////////////////////////
2175	// Step 3: compute the NIC chbuf descriptor physical address //
2176	///////////////////////////////////////////////////////////////
2177
2178	unsigned int offset;
2179	if ( is_rx ) offset = 0x4100;
2180	else offset = 0x4110;
2181	nic_chbuf_pbase = (((unsigned long long)((X_IO << Y_WIDTH) + Y_IO))<<32) \|
2182	(SEG_NIC_BASE + (nic_channel<<15) + offset);
2183
2184	#if GIET_DEBUG_NIC
2185	_printf("\n[DEBUG NIC] _sys_nic_alloc() at cycle %d\n"
2186	"thread %x get NIC chbuf paddr = %l\n",
2187	_get_proctime() , trdid , nic_chbuf_pbase );
2188	#endif
2189
2190	////////////////////////////////////////////////////////////////////////////////
2191	// Step 4: initialize CMA registers defining the source & destination chbufs //
2192	////////////////////////////////////////////////////////////////////////////////
2193
2194	if ( is_rx ) // NIC to kernel
2195	{
2196	_cma_set_register( cma_channel, CHBUF_SRC_DESC , (unsigned int)(nic_chbuf_pbase) );
2197	_cma_set_register( cma_channel, CHBUF_SRC_EXT , (unsigned int)(nic_chbuf_pbase>>32) );
2198	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, 2 );
2199	_cma_set_register( cma_channel, CHBUF_DST_DESC , (unsigned int)(ker_chbuf_pbase) );
2200	_cma_set_register( cma_channel, CHBUF_DST_EXT , (unsigned int)(ker_chbuf_pbase>>32) );
2201	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, xmax * ymax );
2202	}
2203	else // kernel to NIC
2204	{
2205	_cma_set_register( cma_channel, CHBUF_SRC_DESC , (unsigned int)(ker_chbuf_pbase) );
2206	_cma_set_register( cma_channel, CHBUF_SRC_EXT , (unsigned int)(ker_chbuf_pbase>>32) );
2207	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, xmax * ymax );
2208	_cma_set_register( cma_channel, CHBUF_DST_DESC , (unsigned int)(nic_chbuf_pbase) );
2209	_cma_set_register( cma_channel, CHBUF_DST_EXT , (unsigned int)(nic_chbuf_pbase>>32) );
2210	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, 2 );
2211	}
2212
2213	#if GIET_DEBUG_NIC
2214	_printf("\n[DEBUG NIC] _sys_nic_alloc() at cycle %d\n"
2215	"thread %x exit\n",
2216	_get_proctime() , trdid );
2217	#endif
2218
2219	return SYSCALL_OK;
2220	} // end _sys_nic_alloc()
2221
2222
2223	//////////////////////////////////////////
2224	int _sys_nic_release( unsigned int is_rx ) // NOTE: not a syscall: used by _ctx_kill_thread()
2225	{
2226	unsigned int trdid = _get_thread_trdid();
2227
2228	unsigned int nic_channel;
2229	unsigned int cma_channel;
2230
2231	// update the kernel tables
2232	if ( is_rx )
2233	{
2234	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
2235	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
2236
2237	if ( (nic_channel >= NB_NIC_CHANNELS) )
2238	{
2239	_printf("\n[GIET ERROR] in _sys_nic_release() : "
2240	"NIC_RX channel already released for thread %x\n", trdid );
2241
2242	return SYSCALL_CHANNEL_NON_ALLOCATED;
2243	}
2244	if ( (cma_channel >= NB_CMA_CHANNELS) )
2245	{
2246	_printf("\n[GIET ERROR] in _sys_nic_release() : "
2247	"CMA_RX channel already released for thread %x\n", trdid );
2248
2249	return SYSCALL_CHANNEL_NON_ALLOCATED;
2250	}
2251
2252	// atomically decrement the NIC and CMA channel allocators
2253	_atomic_increment( &_nic_rx_channel_alloc[nic_channel] , -1 );
2254	_atomic_increment( &_cma_channel_alloc[cma_channel] , -1 );
2255
2256	// stop the NIC and CMA peripherals channels if no more users
2257	if ( (_nic_rx_channel_alloc[nic_channel] == 0) &&
2258	(_cma_channel_alloc[cma_channel] == 0) ) _sys_nic_stop( 1 );
2259
2260	// reset the calling thread context slots
2261	_set_context_slot( CTX_NIC_RX_ID , 0xFFFFFFFF );
2262	_set_context_slot( CTX_CMA_RX_ID , 0xFFFFFFFF );
2263	}
2264	else
2265	{
2266	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
2267	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
2268
2269	if ( (nic_channel >= NB_NIC_CHANNELS) )
2270	{
2271	_printf("\n[GIET ERROR] in _sys_nic_release() : "
2272	"NIC_TX channel already released for thread %x\n", trdid );
2273
2274	return SYSCALL_CHANNEL_NON_ALLOCATED;
2275	}
2276	if ( (cma_channel >= NB_CMA_CHANNELS) )
2277	{
2278	_printf("\n[GIET ERROR] in _sys_nic_release() : "
2279	"CMA_TX channel already released for thread %x\n", trdid );
2280
2281	return SYSCALL_CHANNEL_NON_ALLOCATED;
2282	}
2283
2284	// atomically decrement the NIC and CMA channel allocators
2285	_atomic_increment( &_nic_tx_channel_alloc[nic_channel] , -1 );
2286	_atomic_increment( &_cma_channel_alloc[cma_channel] , -1 );
2287
2288	// stop the NIC and CMA peripherals channels if no more users
2289	if ( (_nic_tx_channel_alloc[nic_channel] == 0) &&
2290	(_cma_channel_alloc[cma_channel] == 0) ) _sys_nic_stop( 0 );
2291
2292	// reset the calling thread context slots
2293	_set_context_slot( CTX_NIC_TX_ID , 0xFFFFFFFF );
2294	_set_context_slot( CTX_CMA_TX_ID , 0xFFFFFFFF );
2295	}
2296
2297	return SYSCALL_OK;
2298	} // end sys_nic_release()
2299
2300
2301	////////////////////////////////////////
2302	int _sys_nic_start( unsigned int is_rx )
2303	{
2304	unsigned int trdid = _get_context_slot( CTX_TRDID_ID );
2305
2306	unsigned int nic_channel;
2307	unsigned int cma_channel;
2308
2309	// get NIC channel index and CMA channel index from thread context
2310	if ( is_rx )
2311	{
2312	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
2313	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
2314	}
2315	else
2316	{
2317	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
2318	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
2319	}
2320
2321	#if GIET_DEBUG_NIC
2322	_printf("\n[DEBUG NIC] _sys_nic_start() at cycle %d\n"
2323	"thread %x enter / NIC channel = %d / CMA channel = %d\n",
2324	_get_proctime() , trdid , nic_channel, cma_channel );
2325	#endif
2326
2327	// check NIC and CMA channels index
2328	if ( nic_channel >= NB_NIC_CHANNELS )
2329	{
2330	_printf("\n[GIET_ERROR] in _sys_nic_start() : "
2331	"illegal NIC channel for thread %x\n", trdid );
2332	return -1111;
2333	}
2334	if ( cma_channel >= NB_CMA_CHANNELS )
2335	{
2336	_printf("\n[GIET_ERROR] in _sys_nic_start() : "
2337	"illegal CMA channel for thread %x\n", trdid );
2338	return -1111;
2339	}
2340
2341	// start CMA transfer
2342	_cma_set_register( cma_channel, CHBUF_BUF_SIZE , NIC_CONTAINER_SIZE );
2343	_cma_set_register( cma_channel, CHBUF_PERIOD , 0 ); // OUT_OF_ORDER
2344	_cma_set_register( cma_channel, CHBUF_RUN , MODE_NORMAL );
2345
2346	// activates NIC channel
2347	_nic_channel_start( nic_channel, is_rx, GIET_NIC_MAC4, GIET_NIC_MAC2 );
2348
2349	#if GIET_DEBUG_NIC
2350	_printf("\n[DEBUG NIC] _sys_nic_start() at cycle %d\n"
2351	"thread %d exit\n",
2352	_get_proctime() , trdid );
2353	#endif
2354
2355	return SYSCALL_OK;
2356	} // end _sys_nic_start()
2357
2358
2359	//////////////////////////////////////
2360	int _sys_nic_move( unsigned int is_rx,
2361	void* buffer )
2362	{
2363	unsigned int trdid = _get_context_slot( CTX_TRDID_ID );
2364
2365	unsigned int channel;
2366
2367	#if GIET_DEBUG_NIC
2368	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n",
2369	"thread %x enters\n",
2370	_get_proctime() , trdid );
2371	#endif
2372
2373	// get NIC channel index from thread context
2374	if ( is_rx ) channel = _get_context_slot( CTX_NIC_RX_ID );
2375	else channel = _get_context_slot( CTX_NIC_TX_ID );
2376
2377	// check NIC channel index
2378	if ( channel >= NB_NIC_CHANNELS )
2379	{
2380	_printf("\n[GIET_ERROR] in _sys_nic_move() : "
2381	"NIC channel non allocated for thread %x\n", trdid );
2382
2383	return SYSCALL_CHANNEL_NON_ALLOCATED;
2384	}
2385
2386	// get kernel chbuf virtual address
2387	nic_chbuf_t* ker_chbuf;
2388	if ( is_rx ) ker_chbuf = &_nic_ker_rx_chbuf[channel];
2389	else ker_chbuf = &_nic_ker_tx_chbuf[channel];
2390
2391	// get xmax / ymax parameters
2392	unsigned int xmax = ker_chbuf->xmax;
2393	unsigned int ymax = ker_chbuf->ymax;
2394
2395	// get cluster coordinates for the processor running the calling thread
2396	unsigned int procid = _get_procid();
2397	unsigned int cx = procid >> (Y_WIDTH + P_WIDTH);
2398	unsigned int cy = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
2399
2400	// check processor coordinates / (xmax,ymax)
2401	if ( (cx >= xmax) \|\| (cy >= ymax) )
2402	{
2403	_printf("\n[GIET_ERROR] in _sys_nic_move(): "
2404	"processor coordinates [%d,%d] larger than (xmax,ymax) = [%d,%d]\n",
2405	cx , cy , xmax , ymax );
2406
2407	return SYSCALL_ILLEGAL_ARGUMENT;
2408	}
2409
2410	unsigned long long usr_buf_paddr; // user buffer physical address
2411	unsigned long long ker_buf_paddr; // kernel buffer physical address
2412	unsigned long long ker_sts_paddr; // kernel buffer status physical address
2413	unsigned long long ker_buf_desc; // kernel buffer descriptor
2414	unsigned int ker_sts; // kernel buffer status (full or empty)
2415	unsigned int index; // kernel buffer index in chbuf
2416	unsigned int flags; // for _v2P_translate
2417
2418	// Compute user buffer physical address and check access rights
2419	usr_buf_paddr = _v2p_translate( (unsigned int)buffer , &flags );
2420
2421	if ( (flags & PTE_U) == 0 )
2422	{
2423	_printf("\n[GIET ERROR] in _sys_nic_tx_move() : "
2424	"buffer address non user accessible\n");
2425
2426	return SYSCALL_ADDRESS_NON_USER_ACCESSIBLE;
2427	}
2428
2429	#if GIET_DEBUG_NIC
2430	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n"
2431	"thread %x get user buffer : paddr = %l\n",
2432	_get_proctime() , trdid , usr_buf_paddr );
2433	#endif
2434
2435	// compute buffer index, buffer descriptor paddr and buffer status paddr
2436	index = (ymax * cx) + cy;
2437	ker_buf_desc = ker_chbuf->buf_desc[index];
2438	ker_sts_paddr = ((ker_buf_desc & 0xFFF0000000000000ULL) >> 20) +
2439	((ker_buf_desc & 0x3FFFFFFULL) << 6);
2440
2441	#if GIET_DEBUG_NIC
2442	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n"
2443	"thread %x get ker_buf_desc %d / paddr = %l\n",
2444	_get_proctime(), trdid , index , ker_buf_desc );
2445	#endif
2446
2447	// poll local kernel container status until success
2448	while ( 1 )
2449	{
2450	// inval buffer descriptor in L2 before read in L2
2451	_mmc_inval( ker_sts_paddr, 4 );
2452	ker_sts = _physical_read( ker_sts_paddr );
2453
2454	#if GIET_DEBUG_NIC
2455	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n"
2456	"thread %x get status %d / paddr = %l / status = %x\n",
2457	_get_proctime() , trdid , index , ker_sts_paddr, ker_sts );
2458	#endif
2459
2460	// test buffer status and break if found
2461	if ( ( is_rx != 0 ) && ( ker_sts == 0x1 ) ) break;
2462	if ( ( is_rx == 0 ) && ( ker_sts == 0 ) ) break;
2463	}
2464
2465	// compute kernel buffer physical address
2466	ker_buf_paddr = (ker_buf_desc & 0xFFFFFFFFFC000000ULL) >> 20;
2467
2468	// move one container
2469	if ( is_rx ) // RX transfer
2470	{
2471	// inval kernel buffer in L2 before read in L2
2472	_mmc_inval( ker_buf_paddr, NIC_CONTAINER_SIZE );
2473
2474	// transfer data from kernel buffer to user buffer
2475	_physical_memcpy( usr_buf_paddr,
2476	ker_buf_paddr,
2477	NIC_CONTAINER_SIZE );
2478	#if GIET_DEBUG_NIC
2479	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n"
2480	"thread %x transfer kernel buffer %l to user buffer %l\n",
2481	_get_proctime() , trdid , ker_buf_paddr , usr_buf_paddr );
2482	#endif
2483
2484	}
2485	else // TX transfer
2486	{
2487	// transfer data from user buffer to kernel buffer
2488	_physical_memcpy( ker_buf_paddr,
2489	usr_buf_paddr,
2490	NIC_CONTAINER_SIZE );
2491
2492	// sync kernel buffer in L2 after write in L2
2493	_mmc_sync( ker_buf_paddr, NIC_CONTAINER_SIZE );
2494
2495	#if GIET_DEBUG_NIC
2496	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n"
2497	"thread %x transfer user buffer %l to kernel buffer %l\n",
2498	_get_proctime() , trdid , usr_buf_paddr , ker_buf_paddr );
2499	#endif
2500
2501	}
2502
2503	// update kernel chbuf status
2504	if ( is_rx ) _physical_write ( ker_sts_paddr, 0 );
2505	else _physical_write ( ker_sts_paddr, 0x1 );
2506
2507	// sync kernel chbuf in L2 after write in L2
2508	_mmc_sync( ker_sts_paddr, 4 );
2509
2510	#if GIET_DEBUG_NIC
2511	_printf("\n[DEBUG NIC] _sys_nic_move() at cycle %d\n"
2512	"thread %x exit\n",
2513	_get_proctime() , trdid );
2514	#endif
2515
2516	return SYSCALL_OK;
2517	} // end _sys_nic_move()
2518
2519
2520	///////////////////////////////////////
2521	int _sys_nic_stop( unsigned int is_rx )
2522	{
2523	unsigned int trdid = _get_context_slot( CTX_TRDID_ID );
2524
2525	unsigned int nic_channel;
2526	unsigned int cma_channel;
2527
2528	// get NIC channel index and CMA channel index
2529	if ( is_rx )
2530	{
2531	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
2532	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
2533	}
2534	else
2535	{
2536	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
2537	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
2538	}
2539
2540	// check NIC and CMA channels index
2541	if ( nic_channel >= NB_NIC_CHANNELS )
2542	{
2543	_printf("\n[GIET_ERROR] in _sys_nic_stop() : "
2544	"NIC channel non allocated for thread %x\n", trdid );
2545
2546	return SYSCALL_CHANNEL_NON_ALLOCATED;
2547	}
2548	if ( cma_channel >= NB_CMA_CHANNELS )
2549	{
2550	_printf("\n[GIET_ERROR] in _sys_nic_stop() : "
2551	"CMA channel non allocated for thread %x\n", trdid );
2552
2553	return SYSCALL_CHANNEL_NON_ALLOCATED;
2554	}
2555
2556	// desactivates the CMA channel
2557	_cma_set_register( cma_channel, CHBUF_RUN , MODE_IDLE );
2558
2559	// wait until CMA channel IDLE
2560	unsigned int volatile status;
2561	do
2562	{
2563	status = _cma_get_register( cma_channel, CHBUF_STATUS );
2564	}
2565	while ( status );
2566
2567	// desactivates the NIC channel
2568	_nic_channel_stop( nic_channel, is_rx );
2569
2570	return SYSCALL_OK;
2571	} // end _sys_nic_stop()
2572
2573	////////////////////////////////////////
2574	int _sys_nic_clear( unsigned int is_rx )
2575	{
2576	unsigned int trdid = _get_context_slot( CTX_TRDID_ID );
2577
2578	unsigned int channel;
2579
2580	// get NIC channel
2581	if ( is_rx ) channel = _get_context_slot( CTX_NIC_RX_ID );
2582	else channel = _get_context_slot( CTX_NIC_TX_ID );
2583
2584	if ( channel >= NB_NIC_CHANNELS )
2585	{
2586	_printf("\n[GIET_ERROR] in _sys_nic_clear() : "
2587	"NIC channel non allocated for thread %x\n", trdid );
2588
2589	return SYSCALL_CHANNEL_NON_ALLOCATED;
2590	}
2591
2592	if ( is_rx )
2593	{
2594	_nic_set_global_register( NIC_G_NPKT_RX_G2S_RECEIVED , 0 );
2595	_nic_set_global_register( NIC_G_NPKT_RX_DES_TOO_SMALL , 0 );
2596	_nic_set_global_register( NIC_G_NPKT_RX_DES_TOO_BIG , 0 );
2597	_nic_set_global_register( NIC_G_NPKT_RX_DES_MFIFO_FULL , 0 );
2598	_nic_set_global_register( NIC_G_NPKT_RX_DES_CRC_FAIL , 0 );
2599	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_RECEIVED , 0 );
2600	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_BROADCAST , 0 );
2601	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_DST_FAIL , 0 );
2602	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_CH_FULL , 0 );
2603	}
2604	else
2605	{
2606	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_RECEIVED , 0 );
2607	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TRANSMIT , 0 );
2608	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_BIG , 0 );
2609	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_SMALL , 0 );
2610	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_SRC_FAIL , 0 );
2611	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_BYPASS , 0 );
2612	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_BROADCAST , 0 );
2613	}
2614	return SYSCALL_OK;
2615	} // en _sys_nic_clear()
2616
2617	////////////////////////////////////////
2618	int _sys_nic_stats( unsigned int is_rx )
2619	{
2620	unsigned int trdid = _get_context_slot( CTX_TRDID_ID );
2621
2622	unsigned int nic_channel;
2623
2624	// get NIC channel
2625	if ( is_rx ) nic_channel = _get_context_slot( CTX_NIC_RX_ID );
2626	else nic_channel = _get_context_slot( CTX_NIC_TX_ID );
2627
2628	if ( nic_channel >= NB_NIC_CHANNELS )
2629	{
2630	_printf("\n[GIET_ERROR] in _sys_nic_stats() : "
2631	"NIC channel non allocated for thread %x\n", trdid );
2632
2633	return SYSCALL_CHANNEL_NON_ALLOCATED;
2634	}
2635
2636	if ( is_rx )
2637	{
2638	unsigned int received = _nic_get_global_register( NIC_G_NPKT_RX_G2S_RECEIVED );
2639	unsigned int too_small = _nic_get_global_register( NIC_G_NPKT_RX_DES_TOO_SMALL );
2640	unsigned int too_big = _nic_get_global_register( NIC_G_NPKT_RX_DES_TOO_BIG );
2641	unsigned int fifo_full = _nic_get_global_register( NIC_G_NPKT_RX_DES_MFIFO_FULL );
2642	unsigned int crc_fail = _nic_get_global_register( NIC_G_NPKT_RX_DES_CRC_FAIL );
2643	unsigned int broadcast = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_BROADCAST );
2644	unsigned int dst_fail = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_DST_FAIL );
2645	unsigned int ch_full = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_CH_FULL );
2646
2647	_printf("\n### Network Controller RX Statistics ###\n"
2648	"- packets received : %d\n"
2649	"- too small : %d\n"
2650	"- too big : %d\n"
2651	"- fifo full : %d\n"
2652	"- crc fail : %d\n"
2653	"- dst mac fail : %d\n"
2654	"- channel full : %d\n"
2655	"- broadcast : %d\n",
2656	received,
2657	too_small,
2658	too_big,
2659	fifo_full,
2660	crc_fail,
2661	dst_fail,
2662	ch_full,
2663	broadcast );
2664	}
2665	else
2666	{
2667	unsigned int received = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_RECEIVED );
2668	unsigned int too_big = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_BIG );
2669	unsigned int too_small = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_SMALL );
2670	unsigned int src_fail = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_SRC_FAIL );
2671	unsigned int bypass = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_BYPASS );
2672	unsigned int broadcast = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_BROADCAST );
2673
2674	_printf("\n### Network Controller TX Statistics ###\n"
2675	"- packets received : %d\n"
2676	"- too small : %d\n"
2677	"- too big : %d\n"
2678	"- src mac fail : %d\n"
2679	"- bypass : %d\n"
2680	"- broadcast : %d\n",
2681	received,
2682	too_big,
2683	too_small,
2684	src_fail,
2685	bypass,
2686	broadcast );
2687	}
2688	return SYSCALL_OK;
2689	} // end _sys_nic_stats()
2690
2691	#endif
2692
2693	/////////////////////////////////////////////////////////////////////////////////////////
2694	// FBF related syscall handlers
2695	/////////////////////////////////////////////////////////////////////////////////////////
2696
2697	//////////////////////////////////////
2698	int _sys_fbf_size( unsigned int* width,
2699	unsigned int* height )
2700	{
2701	if ( USE_FBF == 0 )
2702	{
2703	*width = 0;
2704	*height = 0;
2705	}
2706	else
2707	{
2708	*width = FBUF_X_SIZE;
2709	*height = FBUF_Y_SIZE;
2710	}
2711
2712	return SYSCALL_OK;
2713	}
2714
2715	////////////////////
2716	int _sys_fbf_alloc()
2717	{
2718	mapping_header_t header = (mapping_header_t )SEG_BOOT_MAPPING_BASE;
2719	mapping_vspace_t *vspace = _get_vspace_base(header);
2720	mapping_thread_t *thread = _get_thread_base(header);
2721
2722	// compute number of users
2723	unsigned int vsid = _get_context_slot(CTX_VSID_ID);
2724	unsigned int users = vspace[vsid].threads;
2725
2726	// access FBF allocator
2727	// register it in all threads contexts
2728	if ( _atomic_test_and_set( &_fbf_alloc , users ) == 0 ) // FBF available
2729	{
2730	unsigned int min = vspace[vsid].thread_offset;
2731	unsigned int max = min + users;
2732	unsigned int tid;
2733	for ( tid = min ; tid < max ; tid++ )
2734	{
2735	unsigned int y_size = header->y_size;
2736	unsigned int cid = thread[tid].clusterid;
2737	unsigned int x = cid / y_size;
2738	unsigned int y = cid % y_size;
2739	unsigned int p = thread[tid].proclocid;
2740	unsigned int ltid = thread[tid].ltid;
2741	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
2742	_atomic_or( &psched->context[ltid].slot[CTX_LOCKS_ID] , LOCKS_MASK_FBF );
2743	}
2744	return SYSCALL_OK;
2745	}
2746	else // FBF already allocated
2747	{
2748	return SYSCALL_SHARED_PERIPHERAL_BUSY;
2749	}
2750	}
2751
2752	//////////////////////
2753	int _sys_fbf_release() // not a syscall: used by _ctx_kill_thread()
2754	{
2755	// get calling thread scheduler, ltid and trdid
2756	static_scheduler_t* psched = _get_sched();
2757	unsigned int ltid = _get_thread_ltid();
2758	unsigned int trdid = _get_thread_trdid();
2759
2760	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
2761	{
2762	_printf("\n[GIET ERROR] in _sys_fbf_release() : "
2763	"FBF not allocated to thread %x\n", trdid );
2764
2765	return SYSCALL_CHANNEL_NON_ALLOCATED;
2766	}
2767
2768	// decrement FBF allocator
2769	// reset the calling thread context
2770	_atomic_increment( &_fbf_alloc , 0xFFFFFFFF );
2771	_atomic_and( &psched->context[ltid].slot[CTX_LOCKS_ID] , ~LOCKS_MASK_FBF );
2772
2773	return SYSCALL_OK;
2774	}
2775
2776	/////////////////////////////////////////////
2777	int _sys_fbf_sync_write( unsigned int offset,
2778	void* buffer,
2779	unsigned int length )
2780	{
2781	// get calling thread scheduler, ltid and trdid
2782	static_scheduler_t* psched = _get_sched();
2783	unsigned int ltid = _get_thread_ltid();
2784	unsigned int trdid = _get_thread_trdid();
2785
2786	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
2787	{
2788	_printf("\n[GIET ERROR] in _sys_fbf_release() : "
2789	"FBF not allocated to thread %x\n", trdid );
2790
2791	return SYSCALL_CHANNEL_NON_ALLOCATED;
2792	}
2793
2794	char* fbf_address = (char *)SEG_FBF_BASE + offset;
2795	memcpy( fbf_address, buffer, length);
2796
2797	return SYSCALL_OK;
2798	}
2799
2800	/////////////////////////////////////////////
2801	int _sys_fbf_sync_read( unsigned int offset,
2802	void* buffer,
2803	unsigned int length )
2804	{
2805	// get calling thread scheduler, ltid and trdid
2806	static_scheduler_t* psched = _get_sched();
2807	unsigned int ltid = _get_thread_ltid();
2808	unsigned int trdid = _get_thread_trdid();
2809
2810	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
2811	{
2812	_printf("\n[GIET ERROR] in _sys_fbf_release() : "
2813	"FBF not allocated to thread %x\n", trdid );
2814
2815	return SYSCALL_CHANNEL_NON_ALLOCATED;
2816	}
2817
2818	char* fbf_address = (char *)SEG_FBF_BASE + offset;
2819	memcpy( buffer, fbf_address, length);
2820
2821	return SYSCALL_OK;
2822	}
2823
2824	////////////////////////////////////////////
2825	int _sys_fbf_cma_alloc( unsigned int nbufs )
2826	{
2827	// compute trdid and vsid for the calling thread
2828	unsigned int vsid = _get_context_slot( CTX_VSID_ID );
2829	unsigned int trdid = _get_thread_trdid();
2830
2831	if ( _get_context_slot( CTX_CMA_FB_ID ) < NB_CMA_CHANNELS )
2832	{
2833	_printf("\n[GIET ERROR] in _sys_fbf_cma_alloc() : "
2834	"CMA channel already allocated for thread %x\n", trdid );
2835	return SYSCALL_CHANNEL_ALREADY_ALLOCATED;
2836	}
2837
2838	// compute number of threads in vspace from mapping
2839	mapping_header_t header = (mapping_header_t )SEG_BOOT_MAPPING_BASE;
2840	mapping_vspace_t *vspace = _get_vspace_base(header);
2841	mapping_thread_t *thread = _get_thread_base(header);
2842	unsigned int first = vspace[vsid].thread_offset;
2843	unsigned int threads = vspace[vsid].threads;
2844
2845	// get a CMA channel
2846	unsigned int channel;
2847	for ( channel = 0 ; channel < NB_CMA_CHANNELS ; channel++ )
2848	{
2849	unsigned int* palloc = &_cma_channel_alloc[channel];
2850	if ( _atomic_test_and_set( palloc , threads ) == 0 ) break;
2851	}
2852
2853	if ( channel >= NB_CMA_CHANNELS )
2854	{
2855	_printf("\n[GIET ERROR] in _sys_fbf_cma_alloc() : no CMA channel available\n");
2856	return SYSCALL_NO_CHANNEL_AVAILABLE;
2857	}
2858
2859	// check nbufs argument
2860	if ( nbufs > 256 )
2861	{
2862	_printf("\n[GIET ERROR] in _sys_fbf_cma_alloc() : nbufs larger than 256\n");
2863	return SYSCALL_ILLEGAL_ARGUMENT;
2864	}
2865
2866	// loop on all threads to register channel in thread contexts
2867	unsigned int tid;
2868	for ( tid = first ; tid < (first + threads) ; tid++ )
2869	{
2870	unsigned int y_size = header->y_size;
2871	unsigned int cid = thread[tid].clusterid;
2872	unsigned int x = cid / y_size;
2873	unsigned int y = cid % y_size;
2874	unsigned int p = thread[tid].proclocid;
2875	unsigned int ltid = thread[tid].ltid;
2876	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
2877	psched->context[ltid].slot[CTX_CMA_FB_ID] = channel;
2878	}
2879
2880	unsigned int vaddr;
2881	unsigned int flags;
2882
2883	// compute frame buffer physical addresses
2884	vaddr = (unsigned int)SEG_FBF_BASE;
2885	unsigned long long fbf_buf_paddr = _v2p_translate( vaddr , &flags );
2886
2887	// initialize the FBF chbuf
2888	// we don't register a status address in the fbf_desc, because
2889	// the CMA does not test the status for the frame buffer (no synchro)
2890	_fbf_ker_chbuf.nbufs = nbufs;
2891	_fbf_ker_chbuf.fbf_desc = (((fbf_buf_paddr & 0xFFFFFFFFFFFULL) >> 6 ) << 26);
2892
2893	// register FBF chbuf physical address
2894	vaddr = (unsigned int)(&_fbf_ker_chbuf);
2895	_fbf_chbuf_paddr = _v2p_translate( vaddr , &flags );
2896
2897	#if GIET_DEBUG_FBF_CMA
2898	_printf("\n[FBF_CMA DEBUG] _sys_fbf_cma_alloc()\n"
2899	" - channel = %d\n"
2900	" - vaddr(_ker_fbf_chbuf) = %x\n"
2901	" - paddr(_ker_fbf_chbuf) = %l\n"
2902	" - nbufs = %d\n"
2903	" - fbf_desc = %l\n",
2904	channel , vaddr , _fbf_chbuf_paddr , nbufs , _fbf_ker_chbuf.fbf_desc );
2905	#endif
2906
2907	return SYSCALL_OK;
2908	} // end sys_fbf_cma_alloc()
2909
2910	//////////////////////////
2911	int _sys_fbf_cma_release() // Not a syscall : used by _ctx_kill_thread()
2912	{
2913	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
2914	unsigned int trdid = _get_thread_trdid();
2915
2916	if ( channel >= NB_CMA_CHANNELS )
2917	{
2918	_printf("\n[GIET_ERROR] in _sys_fbf_cma_release() : "
2919	"CMA_FB channel already released for thread %x\n", trdid );
2920
2921	return SYSCALL_CHANNEL_NON_ALLOCATED;
2922	}
2923
2924	if ( _cma_channel_alloc[channel] == 1 ) // the calling thread is the last user
2925	{
2926	// stop the CMA transfer
2927	_sys_fbf_cma_stop();
2928
2929	// reset the CMA channel allocator
2930	_cma_channel_alloc[channel] = 0;
2931	}
2932	else // not the last user
2933	{
2934	// atomically decrement the CMA channel allocator
2935	_atomic_increment( &_cma_channel_alloc[channel] , -1 );
2936	}
2937
2938	// reset CTX_CMA_FB_ID slot in calling thread context
2939	_set_context_slot( CTX_CMA_FB_ID, 0xFFFFFFFF );
2940
2941	return SYSCALL_OK;
2942	} // end _sys_fbf_cma_release()
2943
2944	///////////////////////////////////////////////////
2945	int _sys_fbf_cma_init_buf( unsigned int index,
2946	void* buf_vaddr,
2947	void* sts_vaddr )
2948	{
2949	unsigned int vaddr; // virtual address
2950	unsigned int flags; // for _v2p_translate()
2951	unsigned long long buf_paddr; // user buffer physical address
2952	unsigned long long sts_paddr; // user status physical address
2953
2954	// get calling thread scheduler, ltid and trdid
2955	static_scheduler_t* psched = _get_sched();
2956	unsigned int ltid = _get_thread_ltid();
2957	unsigned int trdid = _get_thread_trdid();
2958
2959	// check FBF allocated
2960	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
2961	{
2962	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
2963	"FBF not allocated to thread %x\n", trdid );
2964
2965	return SYSCALL_CHANNEL_NON_ALLOCATED;
2966	}
2967
2968	// get channel index
2969	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
2970
2971	if ( channel >= NB_CMA_CHANNELS )
2972	{
2973	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
2974	"CMA channel non allocated to thread %x\n", trdid );
2975
2976	return SYSCALL_CHANNEL_NON_ALLOCATED;
2977	}
2978
2979	#if GIET_DEBUG_FBF_CMA
2980	_printf("\n[FBF_CMA DEBUG] _sys_fbf_cma_init_buf()\n"
2981	" - channel = %d / index = %d\n"
2982	" - buf vaddr = %x\n"
2983	" - sts vaddr = %x\n",
2984	channel, index,
2985	(unsigned int)buf_vaddr,
2986	(unsigned int)sts_vaddr );
2987	#endif
2988
2989	// checking index argument
2990	if ( index >= _fbf_ker_chbuf.nbufs )
2991	{
2992	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
2993	"user buffer index too large %x\n", trdid );
2994
2995	return SYSCALL_CHANNEL_NON_ALLOCATED;
2996	}
2997
2998	// checking user buffer and status addresses alignment
2999	if ( ((unsigned int)buf_vaddr & 0x3F) \|\| ((unsigned int)sts_vaddr & 0x3F) )
3000	{
3001	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
3002	"user buffer or status not aligned for thread %x\n", trdid );
3003
3004	return SYSCALL_ADDRESS_NON_ALIGNED;
3005	}
3006
3007	// Compute user buffer and status physical addresses
3008	vaddr = (unsigned int)buf_vaddr;
3009	buf_paddr = _v2p_translate( vaddr , &flags );
3010	if ((flags & PTE_U) == 0)
3011	{
3012	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
3013	"buffer not in user space for thread %x\n", trdid );
3014
3015	return SYSCALL_ADDRESS_NON_USER_ACCESSIBLE;
3016	}
3017
3018	vaddr = (unsigned int)sts_vaddr;
3019	sts_paddr = _v2p_translate( vaddr , &flags );
3020	if ((flags & PTE_U) == 0)
3021	{
3022	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
3023	"status not in user space for thread %x\n", trdid);
3024
3025	return SYSCALL_ADDRESS_NON_USER_ACCESSIBLE;
3026	}
3027
3028	// check user buffer and user status in same cluster
3029	if ( (buf_paddr & 0xFF00000000ULL) != (sts_paddr & 0xFF00000000ULL) )
3030	{
3031	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : "
3032	"user status and buffer not in same cluster for thread %x\n", trdid);
3033
3034	return SYSCALL_ADDRESS_NON_USER_ACCESSIBLE;
3035	}
3036
3037	// initialize _fbf_ker_chbuf.usr_desc[index]
3038	_fbf_ker_chbuf.usr_desc[index] = ((sts_paddr & 0xFFFFFFFFULL) >> 6) +
3039	(((buf_paddr & 0xFFFFFFFFFFULL) >> 6 ) << 26);
3040
3041	#if GIET_DEBUG_FBF_CMA
3042	_printf(" - buf paddr = %l\n"
3043	" - sts paddr = %l\n"
3044	" - usr_desc[%d] = %l\n",
3045	buf_paddr,
3046	sts_paddr,
3047	index , _fbf_ker_chbuf.usr_desc[index] );
3048	#endif
3049
3050	return SYSCALL_OK;
3051
3052	} // end sys_fbf_cma_init_buf()
3053
3054	////////////////////////
3055	int _sys_fbf_cma_start()
3056	{
3057	// get calling thread scheduler, ltid and trdid
3058	static_scheduler_t* psched = _get_sched();
3059	unsigned int ltid = _get_thread_ltid();
3060	unsigned int trdid = _get_thread_trdid();
3061
3062	// check FBF allocated
3063	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
3064	{
3065	_printf("\n[GIET ERROR] in _sys_fbf_release() : "
3066	"FBF not allocated to thread %x\n", trdid );
3067
3068	return SYSCALL_CHANNEL_NON_ALLOCATED;
3069	}
3070
3071	// get CMA channel index
3072	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
3073
3074	if ( channel >= NB_CMA_CHANNELS )
3075	{
3076	_printf("\n[GIET ERROR] in _fbf_cma_start() : "
3077	"CMA channel non allocated\n");
3078
3079	return SYSCALL_CHANNEL_NON_ALLOCATED;
3080	}
3081
3082	// check buffers initialization
3083	if ( _fbf_ker_chbuf.nbufs == 0 )
3084	{
3085	_printf("\n[GIET ERROR] in _sys_fbf_cma_start(): "
3086	"FBF chbuf not initialized for thread %x\n", trdid );
3087
3088	return SYSCALL_MISSING_INITIALISATION;
3089	}
3090
3091	// synchronize FBF chbuf that will be read by CMA peripheral
3092	if ( USE_IOB )
3093	{
3094	// SYNC request for fbf_chbuf descriptor
3095	_mmc_sync( _fbf_chbuf_paddr , sizeof( fbf_chbuf_t ) );
3096	}
3097
3098	// start CMA transfer
3099	unsigned long long paddr = _fbf_chbuf_paddr;
3100	unsigned int dst_chbuf_paddr_lsb = (unsigned int)(paddr & 0xFFFFFFFF);
3101	unsigned int dst_chbuf_paddr_ext = (unsigned int)(paddr >> 32);
3102	unsigned int src_chbuf_paddr_lsb = dst_chbuf_paddr_lsb + 8;
3103	unsigned int src_chbuf_paddr_ext = dst_chbuf_paddr_ext;
3104
3105	#if GIET_DEBUG_FBF_CMA
3106	_printf("\n[FBF_CMA DEBUG] _sys_fbf_cma_start()\n"
3107	" - src_chbuf_paddr_lsb = %x\n"
3108	" - src_chbuf_paddr_ext = %x\n"
3109	" - src_chbuf_nbufs = %d\n"
3110	" - dst_chbuf_paddr_lsb = %x\n"
3111	" - dst_chbuf_paddr_ext = %x\n"
3112	" - dst_chbuf_nbufs = 1 \n"
3113	" - buffer_size = %d\n",
3114	src_chbuf_paddr_lsb,
3115	src_chbuf_paddr_ext,
3116	_fbf_ker_chbuf.nbufs,
3117	dst_chbuf_paddr_lsb,
3118	dst_chbuf_paddr_ext,
3119	FBUF_X_SIZE * FBUF_Y_SIZE );
3120	#endif
3121
3122	_cma_set_register( channel, CHBUF_SRC_DESC , src_chbuf_paddr_lsb );
3123	_cma_set_register( channel, CHBUF_SRC_EXT , src_chbuf_paddr_ext );
3124	_cma_set_register( channel, CHBUF_SRC_NBUFS, _fbf_ker_chbuf.nbufs );
3125	_cma_set_register( channel, CHBUF_DST_DESC , dst_chbuf_paddr_lsb );
3126	_cma_set_register( channel, CHBUF_DST_EXT , dst_chbuf_paddr_ext );
3127	_cma_set_register( channel, CHBUF_DST_NBUFS, 1 );
3128	_cma_set_register( channel, CHBUF_BUF_SIZE , FBUF_X_SIZE*FBUF_Y_SIZE );
3129	_cma_set_register( channel, CHBUF_PERIOD , 1000 );
3130	_cma_set_register( channel, CHBUF_RUN , MODE_NO_DST_SYNC );
3131
3132	return SYSCALL_OK;
3133
3134	} // end _sys_fbf_cma_start()
3135
3136	////////////////////////////////////////////
3137	int _sys_fbf_cma_check( unsigned int index )
3138	{
3139	// get calling thread scheduler, ltid and trdid
3140	static_scheduler_t* psched = _get_sched();
3141	unsigned int ltid = _get_thread_ltid();
3142	unsigned int trdid = _get_thread_trdid();
3143
3144	// check FBF allocated
3145	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
3146	{
3147	_printf("\n[GIET ERROR] in _sys_fbf_cma_check() : "
3148	"FBF not allocated to thread %x\n", trdid );
3149
3150	return SYSCALL_CHANNEL_NON_ALLOCATED;
3151	}
3152
3153	// get channel index
3154	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
3155
3156	if ( channel >= NB_CMA_CHANNELS )
3157	{
3158	_printf("\n[GIET ERROR] in _sys_fbf_cma_check() : "
3159	"CMA channel non allocated to thread %x\n", trdid );
3160
3161	return SYSCALL_CHANNEL_NON_ALLOCATED;
3162	}
3163
3164	// check buffer index
3165	if ( index >= _fbf_ker_chbuf.nbufs )
3166	{
3167	_printf("\n[GIET ERROR] in _sys_fbf_cma_check() : "
3168	"buffer index too large for thread %x\n", trdid );
3169
3170	return SYSCALL_CHANNEL_NON_ALLOCATED;
3171	}
3172
3173	// compute user buffer status physical addresses
3174	unsigned long long usr_sts_paddr;
3175	fbf_chbuf_t* pdesc = &_fbf_ker_chbuf;
3176	usr_sts_paddr = ((pdesc->usr_desc[index] & 0xFFF0000000000000ULL) >> 20) +
3177	((pdesc->usr_desc[index] & 0x3FFFFFFULL) << 6);
3178
3179	#if GIET_DEBUG_FBF_CMA
3180	_printf("\n[FBF_CMA DEBUG] enters _sys_fbf_cma_check()\n"
3181	" - cma channel = %d\n"
3182	" - buffer index = %d\n"
3183	" - usr_desc value = %l\n"
3184	" - fbf_desc value = %l\n"
3185	" - usr status paddr = %l\n",
3186	channel,
3187	index,
3188	_fbf_ker_chbuf.usr_desc[index],
3189	_fbf_ker_chbuf.fbf_desc,
3190	usr_sts_paddr );
3191	#endif
3192
3193	// waiting user buffer released by the CMA component)
3194	unsigned int full;
3195	do
3196	{
3197	// INVAL L2 cache copy of user buffer status
3198	// because it is modified in RAM by the CMA component
3199	_mmc_inval( usr_sts_paddr , 4 );
3200
3201	full = _physical_read( usr_sts_paddr );
3202	}
3203	while ( full );
3204
3205	return SYSCALL_OK;
3206
3207	} // end _sys_fbf_cma_check()
3208
3209	//////////////////////////////////////////////
3210	int _sys_fbf_cma_display( unsigned int index )
3211	{
3212	// get calling thread scheduler, ltid and trdid
3213	static_scheduler_t* psched = _get_sched();
3214	unsigned int ltid = _get_thread_ltid();
3215	unsigned int trdid = _get_thread_trdid();
3216
3217	// check FBF allocated
3218	if ( (psched->context[ltid].slot[CTX_LOCKS_ID] & LOCKS_MASK_FBF) == 0 )
3219	{
3220	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : "
3221	"FBF not allocated to thread %x\n", trdid );
3222
3223	return SYSCALL_CHANNEL_NON_ALLOCATED;
3224	}
3225
3226	// get channel index
3227	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
3228
3229	if ( channel >= NB_CMA_CHANNELS )
3230	{
3231	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : "
3232	"CMA channel non allocated to thread %x\n", trdid );
3233
3234	return SYSCALL_CHANNEL_NON_ALLOCATED;
3235	}
3236
3237	// check buffer index
3238	if ( index >= _fbf_ker_chbuf.nbufs )
3239	{
3240	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : "
3241	"buffer index too large for thread %x\n", trdid );
3242
3243	return SYSCALL_CHANNEL_NON_ALLOCATED;
3244	}
3245
3246	// compute user buffer and status physical addresses
3247	unsigned long long usr_sts_paddr;
3248	unsigned long long usr_buf_paddr;
3249
3250	fbf_chbuf_t* pdesc = &_fbf_ker_chbuf;
3251
3252	usr_sts_paddr = ((pdesc->usr_desc[index] & 0xFFF0000000000000ULL) >> 20) +
3253	((pdesc->usr_desc[index] & 0x3FFFFFFULL) << 6);
3254
3255	usr_buf_paddr = ((pdesc->usr_desc[index] & 0xFFFFFFFFFC000000ULL) >> 20);
3256
3257	#if GIET_DEBUG_FBF_CMA
3258	_printf("\n[FBF_CMA DEBUG] enters _sys_fbf_cma_display()\n"
3259	" - cma channel = %d\n"
3260	" - buffer index = %d\n"
3261	" - usr buffer paddr = %l\n"
3262	" - usr status paddr = %l\n",
3263	channel,
3264	index,
3265	usr_buf_paddr,
3266	usr_sts_paddr );
3267	#endif
3268
3269	// SYNC request, because this buffer will be read from XRAM by the CMA component
3270	_mmc_sync( usr_buf_paddr , FBUF_X_SIZE * FBUF_Y_SIZE );
3271
3272	// set user buffer status
3273	_physical_write( usr_sts_paddr, 0x1 );
3274
3275	// SYNC request, because this status will be read from XRAM by the CMA component
3276	_mmc_sync( usr_sts_paddr, 4 );
3277
3278	return SYSCALL_OK;
3279
3280	} // end _sys_fbf_cma_display()
3281
3282	///////////////////////
3283	int _sys_fbf_cma_stop()
3284	{
3285	// get channel index
3286	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
3287
3288	if ( channel >= NB_CMA_CHANNELS )
3289	{
3290	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : CMA channel non allocated\n");
3291
3292	return SYSCALL_CHANNEL_NON_ALLOCATED;
3293	}
3294
3295	// Desactivate CMA channel
3296	_cma_set_register( channel, CHBUF_RUN, MODE_IDLE );
3297
3298	return SYSCALL_OK;
3299
3300	} // end _sys_fbf_cma_stop()
3301
3302
3303	//////////////////////////////////////////////////////////////////////////////
3304	// Miscelaneous syscall handlers
3305	//////////////////////////////////////////////////////////////////////////////
3306
3307	///////////////
3308	int _sys_ukn()
3309	{
3310	_printf("\n[GIET ERROR] Undefined System Call / EPC = %x\n", _get_epc() );
3311
3312	return SYSCALL_UNDEFINED_SYSTEM_CALL;
3313	}
3314
3315	////////////////////////////////////
3316	int _sys_proc_xyp( unsigned int* x,
3317	unsigned int* y,
3318	unsigned int* p )
3319	{
3320	unsigned int gpid = _get_procid(); // global processor index from CPO register
3321
3322	*x = (gpid >> (Y_WIDTH + P_WIDTH)) & ((1<<X_WIDTH)-1);
3323	*y = (gpid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
3324	*p = gpid & ((1<<P_WIDTH)-1);
3325
3326	return SYSCALL_OK;
3327	}
3328
3329	////////////////////////////////////////////
3330	int _sys_procs_number( unsigned int* x_size,
3331	unsigned int* y_size,
3332	unsigned int* nprocs )
3333	{
3334	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
3335	mapping_cluster_t * cluster = _get_cluster_base(header);
3336
3337	unsigned int x;
3338	unsigned int y;
3339	unsigned int okmin = 1;
3340	unsigned int okmax = 1;
3341
3342	// compute max values
3343	unsigned int xmax = header->x_size;
3344	unsigned int ymax = header->y_size;
3345	unsigned int procs = cluster[0].procs;
3346
3347	// check the (ymax-1) lower rows
3348	for ( y = 0 ; y < ymax-1 ; y++ )
3349	{
3350	for ( x = 0 ; x < xmax ; x++ )
3351	{
3352	if (cluster[x*ymax+y].procs != procs ) okmin = 0;
3353	}
3354	}
3355
3356	// check the upper row
3357	for ( x = 0 ; x < xmax ; x++ )
3358	{
3359	if (cluster[x*ymax+ymax-1].procs != procs ) okmax = 0;
3360	}
3361
3362	// return values
3363	if ( okmin && okmax )
3364	{
3365	*x_size = xmax;
3366	*y_size = ymax;
3367	*nprocs = procs;
3368	}
3369	else if ( okmin )
3370	{
3371	*x_size = xmax;
3372	*y_size = ymax-1;
3373	*nprocs = procs;
3374	}
3375	else
3376	{
3377	*x_size = 0;
3378	*y_size = 0;
3379	*nprocs = 0;
3380	}
3381	return SYSCALL_OK;
3382	}
3383
3384	///////////////////////////////////////////////////////
3385	int _sys_vseg_get_vbase( char* vspace_name,
3386	char* vseg_name,
3387	unsigned int* vbase )
3388	{
3389	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
3390	mapping_vspace_t * vspace = _get_vspace_base(header);
3391	mapping_vseg_t * vseg = _get_vseg_base(header);
3392
3393	unsigned int vspace_id;
3394	unsigned int vseg_id;
3395
3396	// scan vspaces
3397	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
3398	{
3399	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
3400	{
3401	// scan vsegs
3402	for (vseg_id = vspace[vspace_id].vseg_offset;
3403	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
3404	vseg_id++)
3405	{
3406	if (_strncmp(vseg[vseg_id].name, vseg_name, 31) == 0)
3407	{
3408	*vbase = vseg[vseg_id].vbase;
3409	return SYSCALL_OK;
3410	}
3411	}
3412	}
3413	}
3414	return SYSCALL_VSEG_NOT_FOUND;
3415	}
3416
3417	/////////////////////////////////////////////////////////
3418	int _sys_vseg_get_length( char* vspace_name,
3419	char* vseg_name,
3420	unsigned int* length )
3421	{
3422	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
3423	mapping_vspace_t * vspace = _get_vspace_base(header);
3424	mapping_vseg_t * vseg = _get_vseg_base(header);
3425
3426	unsigned int vspace_id;
3427	unsigned int vseg_id;
3428
3429	// scan vspaces
3430	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
3431	{
3432	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
3433	{
3434	// scan vsegs
3435	for (vseg_id = vspace[vspace_id].vseg_offset;
3436	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
3437	vseg_id++)
3438	{
3439	if (_strncmp(vseg[vseg_id].name, vseg_name, 31) == 0)
3440	{
3441	*length = vseg[vseg_id].length;
3442	return SYSCALL_OK;
3443	}
3444	}
3445	}
3446	}
3447	return SYSCALL_VSEG_NOT_FOUND;
3448	}
3449
3450	////////////////////////////////////////
3451	int _sys_xy_from_ptr( void* ptr,
3452	unsigned int* x,
3453	unsigned int* y )
3454	{
3455	unsigned int flags;
3456	unsigned long long paddr = _v2p_translate( (unsigned int)ptr , &flags );
3457
3458	*x = (paddr>>36) & 0xF;
3459	*y = (paddr>>32) & 0xF;
3460
3461	return SYSCALL_OK;
3462	}
3463
3464	/////////////////////////////////////////
3465	int _sys_heap_info( unsigned int* vaddr,
3466	unsigned int* length,
3467	unsigned int x,
3468	unsigned int y )
3469	{
3470	// checking parameters
3471	if ( (x >= X_SIZE) \|\| (y >= Y_SIZE) )
3472	{
3473	*vaddr = 0;
3474	*length = 0;
3475	_printf("\n[GIET ERROR] in _sys_heap_info() : "
3476	"illegal (%d,%d) coordinates\n", x , y );
3477	return SYSCALL_ILLEGAL_CLUSTER_COORDINATES;
3478	}
3479
3480	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
3481	mapping_thread_t * thread = _get_thread_base(header);
3482	mapping_vseg_t * vseg = _get_vseg_base(header);
3483	mapping_vspace_t * vspace = _get_vspace_base(header);
3484
3485	unsigned int thread_id;
3486	unsigned int vspace_id;
3487	unsigned int vseg_id = 0xFFFFFFFF;
3488
3489	// get calling thread vspace index
3490	vspace_id = _get_context_slot(CTX_VSID_ID);
3491
3492	// scan all threads in vspace to find one in clyster[x,y]
3493	unsigned int min = vspace[vspace_id].thread_offset ;
3494	unsigned int max = min + vspace[vspace_id].threads ;
3495	for ( thread_id = min ; thread_id < max ; thread_id++ )
3496	{
3497	if ( thread[thread_id].clusterid == (x * Y_SIZE + y) )
3498	{
3499	vseg_id = thread[thread_id].heap_vseg_id;
3500	break;
3501	}
3502	}
3503
3504	// analysing the vseg_id
3505	if ( vseg_id != 0xFFFFFFFF )
3506	{
3507	*vaddr = vseg[vseg_id].vbase;
3508	*length = vseg[vseg_id].length;
3509	}
3510	else
3511	{
3512	*vaddr = 0;
3513	*length = 0;
3514	_printf("error in _sys_heap_info() : no heap in cluster (%d,%d)\n", x , y );
3515	}
3516	return SYSCALL_OK;
3517	} // end _sys_heap_info()
3518
3519
3520	// Local Variables:
3521	// tab-width: 4
3522	// c-basic-offset: 4
3523	// c-file-offsets:((innamespace . 0)(inline-open . 0))
3524	// indent-tabs-mode: nil
3525	// End:
3526	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
3527

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