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source: soft/giet_vm/giet_kernel/sys_handler.c @ 696

Last change on this file since 696 was 696, checked in by guerin, 9 years ago
kernel: defer task exec to _ctx_switch()
Property svn:executable set to ``*
File size: 75.2 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 <utils.h>
18	#include <kernel_malloc.h>
19	#include <tty0.h>
20	#include <vmem.h>
21	#include <hard_config.h>
22	#include <giet_config.h>
23	#include <mapping_info.h>
24	#include <irq_handler.h>
25	#include <io.h>
26
27	#if !defined(SEG_BOOT_MAPPING_BASE)
28	# error: You must define SEG_BOOT_MAPPING_BASE in the hard_config.h file
29	#endif
30
31	#if !defined(NB_TTY_CHANNELS)
32	# error: You must define NB_TTY_CHANNELS in the hard_config.h file
33	#endif
34
35	#if (NB_TTY_CHANNELS < 1)
36	# error: NB_TTY_CHANNELS cannot be smaller than 1!
37	#endif
38
39	#if !defined(NB_TIM_CHANNELS)
40	# error: You must define NB_TIM_CHANNELS in the hard_config.h file
41	#endif
42
43	#if !defined(NB_NIC_CHANNELS)
44	# error: You must define NB_NIC_CHANNELS in the hard_config.h file
45	#endif
46
47	#if !defined(NB_CMA_CHANNELS)
48	# error: You must define NB_CMA_CHANNELS in the hard_config.h file
49	#endif
50
51	#if !defined(GIET_NO_HARD_CC)
52	# error: You must define GIET_NO_HARD_CC in the giet_config.h file
53	#endif
54
55	#if !defined ( GIET_NIC_MAC4 )
56	# error: You must define GIET_NIC_MAC4 in the giet_config.h file
57	#endif
58
59	#if !defined ( GIET_NIC_MAC2 )
60	# error: You must define GIET_NIC_MAC2 in the giet_config.h file
61	#endif
62
63	////////////////////////////////////////////////////////////////////////////
64	// Extern variables
65	////////////////////////////////////////////////////////////////////////////
66
67	// allocated in tty0.c file.
68	extern sqt_lock_t _tty0_sqt_lock;
69
70	// allocated in mwr_driver.c file.
71	extern simple_lock_t _coproc_lock[X_SIZE*Y_SIZE];
72	extern unsigned int _coproc_type[X_SIZE*Y_SIZE];
73	extern unsigned int _coproc_info[X_SIZE*Y_SIZE];
74	extern unsigned int _coproc_mode[X_SIZE*Y_SIZE];
75	extern unsigned int _coproc_error[X_SIZE*Y_SIZE];
76	extern unsigned int _coproc_gtid[X_SIZE*Y_SIZE];
77
78
79	// allocated in tty_driver.c file.
80	extern unsigned int _tty_rx_full[NB_TTY_CHANNELS];
81	extern unsigned int _tty_rx_buf[NB_TTY_CHANNELS];
82
83	// allocated in kernel_init.c file
84	extern static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX];
85
86	////////////////////////////////////////////////////////////////////////////
87	// Channel allocators for peripherals
88	// (TTY[0] is reserved for kernel)
89	////////////////////////////////////////////////////////////////////////////
90
91	__attribute__((section(".kdata")))
92	unsigned int _tty_channel_allocator = 1;
93
94	__attribute__((section(".kdata")))
95	unsigned int _tim_channel_allocator = 0;
96
97	__attribute__((section(".kdata")))
98	unsigned int _cma_channel_allocator = 0;
99
100	__attribute__((section(".kdata")))
101	unsigned int _nic_rx_channel_allocator = 0;
102
103	__attribute__((section(".kdata")))
104	unsigned int _nic_tx_channel_allocator = 0;
105
106	////////////////////////////////////////////////////////////////////////////
107	// NIC_RX and NIC_TX kernel chbuf arrays
108	////////////////////////////////////////////////////////////////////////////
109
110	__attribute__((section(".kdata")))
111	ker_chbuf_t _nic_ker_rx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(64)));
112
113	__attribute__((section(".kdata")))
114	ker_chbuf_t _nic_ker_tx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(64)));
115
116	////////////////////////////////////////////////////////////////////////////
117	// FBF related chbuf descriptors array, indexed by the CMA channel index.
118	// Physical addresses of these chbuf descriptors required for L2 cache sync.
119	// FBF status
120	////////////////////////////////////////////////////////////////////////////
121
122	__attribute__((section(".kdata")))
123	fbf_chbuf_t _fbf_chbuf[NB_CMA_CHANNELS] __attribute__((aligned(64)));
124
125	__attribute__((section(".kdata")))
126	unsigned long long _fbf_chbuf_paddr[NB_CMA_CHANNELS];
127
128	__attribute__((section(".kdata")))
129	buffer_status_t _fbf_status[NB_CMA_CHANNELS] __attribute__((aligned(64)));
130
131	////////////////////////////////////////////////////////////////////////////
132	// Initialize the syscall vector with syscall handlers
133	// Note: This array must be synchronised with the define in file stdio.h
134	////////////////////////////////////////////////////////////////////////////
135
136	__attribute__((section(".kdata")))
137	const void * _syscall_vector[64] =
138	{
139	&_sys_proc_xyp, /* 0x00 */
140	&_get_proctime, /* 0x01 */
141	&_sys_tty_write, /* 0x02 */
142	&_sys_tty_read, /* 0x03 */
143	&_sys_tty_alloc, /* 0x04 */
144	&_sys_tasks_status, /* 0x05 */
145	&_sys_ukn, /* 0x06 */
146	&_sys_heap_info, /* 0x07 */
147	&_sys_local_task_id, /* 0x08 */
148	&_sys_global_task_id, /* 0x09 */
149	&_sys_fbf_cma_alloc, /* 0x0A */
150	&_sys_fbf_cma_init_buf, /* 0x0B */
151	&_sys_fbf_cma_start, /* 0x0C */
152	&_sys_fbf_cma_display, /* 0x0D */
153	&_sys_fbf_cma_stop, /* 0x0E */
154	&_sys_task_exit, /* 0x0F */
155
156	&_sys_procs_number, /* 0x10 */
157	&_sys_fbf_sync_write, /* 0x11 */
158	&_sys_fbf_sync_read, /* 0x12 */
159	&_sys_thread_id, /* 0x13 */
160	&_sys_tim_alloc, /* 0x14 */
161	&_sys_tim_start, /* 0x15 */
162	&_sys_tim_stop, /* 0x16 */
163	&_sys_kill_application, /* 0x17 */
164	&_sys_exec_application, /* 0x18 */
165	&_sys_context_switch, /* 0x19 */
166	&_sys_vseg_get_vbase, /* 0x1A */
167	&_sys_vseg_get_length, /* 0x1B */
168	&_sys_xy_from_ptr, /* 0x1C */
169	&_sys_ukn, /* 0x1D */
170	&_sys_ukn, /* 0x1E */
171	&_sys_ukn, /* 0x1F */
172
173	&_fat_open, /* 0x20 */
174	&_fat_read, /* 0x21 */
175	&_fat_write, /* 0x22 */
176	&_fat_lseek, /* 0x23 */
177	&_fat_file_info, /* 0x24 */
178	&_fat_close, /* 0x25 */
179	&_fat_remove, /* 0x26 */
180	&_fat_rename, /* 0x27 */
181	&_fat_mkdir, /* 0x28 */
182	&_fat_opendir, /* 0x29 */
183	&_fat_closedir, /* 0x2A */
184	&_fat_readdir, /* 0x2B */
185	&_sys_ukn, /* 0x2C */
186	&_sys_ukn, /* 0x2D */
187	&_sys_ukn, /* 0x2E */
188	&_sys_ukn, /* 0x2F */
189
190	&_sys_nic_alloc, /* 0x30 */
191	&_sys_nic_start, /* 0x31 */
192	&_sys_nic_move, /* 0x32 */
193	&_sys_nic_stop, /* 0x33 */
194	&_sys_nic_stats, /* 0x34 */
195	&_sys_nic_clear, /* 0x35 */
196	&_sys_ukn, /* 0x36 */
197	&_sys_ukn, /* 0x37 */
198	&_sys_ukn, /* 0x38 */
199	&_sys_ukn, /* 0x39 */
200	&_sys_ukn, /* 0x3A */
201	&_sys_coproc_completed, /* 0x3B */
202	&_sys_coproc_alloc, /* 0x3C */
203	&_sys_coproc_channel_init, /* 0x3D */
204	&_sys_coproc_run, /* 0x3E */
205	&_sys_coproc_release, /* 0x3F */
206	};
207
208
209	//////////////////////////////////////////////////////////////////////////////
210	// Applications related syscall handlers
211	//////////////////////////////////////////////////////////////////////////////
212
213	///////////////////////////////////////
214	int _sys_kill_application( char* name )
215	{
216	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
217	mapping_vspace_t * vspace = _get_vspace_base(header);
218	mapping_task_t * task = _get_task_base(header);
219
220	unsigned int vspace_id;
221	unsigned int task_id;
222	unsigned int y_size = header->y_size;
223
224	#if GIET_DEBUG_EXEC
225	if ( _get_proctime() > GIET_DEBUG_EXEC )
226	_printf("\n[DEBUG EXEC] enters _sys_kill_application() for %s\n", name );
227	#endif
228
229	// scan vspaces
230	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
231	{
232	if ( _strcmp( vspace[vspace_id].name, name ) == 0 )
233	{
234	// check if application can be killed
235	if ( vspace[vspace_id].active ) return -2;
236
237	// scan tasks in vspace
238	for (task_id = vspace[vspace_id].task_offset;
239	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
240	task_id++)
241	{
242	unsigned int cid = task[task_id].clusterid;
243	unsigned int x = cid / y_size;
244	unsigned int y = cid % y_size;
245	unsigned int p = task[task_id].proclocid;
246	unsigned int ltid = task[task_id].ltid;
247
248	// get scheduler pointer for processor running the task
249	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
250
251	// set KILL signal bit
252	_atomic_or( &psched->context[ltid][CTX_SIG_ID] , SIG_MASK_KILL );
253	}
254
255	#if GIET_DEBUG_EXEC
256	if ( _get_proctime() > GIET_DEBUG_EXEC )
257	_printf("\n[DEBUG EXEC] exit _sys_kill_application() : %s will be killed\n", name );
258	#endif
259
260	return 0;
261	}
262	}
263
264	#if GIET_DEBUG_EXEC
265	if ( _get_proctime() > GIET_DEBUG_EXEC )
266	_printf("\n[DEBUG EXEC] exit _sys_kill_application() : %s not found\n", name );
267	#endif
268
269	return -1; // not found
270
271	} // end _sys_kill_application()
272
273	///////////////////////////////////////
274	int _sys_exec_application( char* name )
275	{
276	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
277	mapping_vspace_t * vspace = _get_vspace_base(header);
278	mapping_task_t * task = _get_task_base(header);
279
280	unsigned int vspace_id;
281	unsigned int task_id;
282	unsigned int y_size = header->y_size;
283
284	#if GIET_DEBUG_EXEC
285	if ( _get_proctime() > GIET_DEBUG_EXEC )
286	_printf("\n[DEBUG EXEC] enters _sys_exec_application() at cycle %d for %s\n",
287	_get_proctime() , name );
288	#endif
289
290	// scan vspaces
291	for (vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++)
292	{
293	if ( _strcmp( vspace[vspace_id].name, name ) == 0 )
294	{
295	// scan tasks in vspace
296	for (task_id = vspace[vspace_id].task_offset;
297	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
298	task_id++)
299	{
300	unsigned int cid = task[task_id].clusterid;
301	unsigned int x = cid / y_size;
302	unsigned int y = cid % y_size;
303	unsigned int p = task[task_id].proclocid;
304	unsigned int ltid = task[task_id].ltid;
305
306	// get scheduler pointer for processor running the task
307	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
308
309	// set EXEC signal bit
310	_atomic_or( &psched->context[ltid][CTX_SIG_ID] , SIG_MASK_EXEC );
311	}
312
313	#if GIET_DEBUG_EXEC
314	if ( _get_proctime() > GIET_DEBUG_EXEC )
315	_printf("\n[DEBUG EXEC] exit _sys_exec_application() at cycle %d : %s will be executed\n",
316	_get_proctime() , name );
317	#endif
318
319	return 0; // application found and activated
320	}
321	}
322
323	#if GIET_DEBUG_EXEC
324	if ( _get_proctime() > GIET_DEBUG_EXEC )
325	_printf("\n[DEBUG EXEC] exit _sys_exec_application() at cycle %d : %s not found\n",
326	_get_proctime() , name );
327	#endif
328
329	return -1; // not found
330
331	} // end _sys_exec_application()
332
333
334	//////////////////////////////////////////////////////////////////////////////
335	// Coprocessors related syscall handlers
336	//////////////////////////////////////////////////////////////////////////////
337
338	//////////////////////////////////////////////////
339	int _sys_coproc_alloc( unsigned int coproc_type,
340	unsigned int* coproc_info )
341	{
342	// In this implementation, the allocation policy is constrained:
343	// the coprocessor must be in the same cluster as the calling task,
344	// and there is at most one coprocessor per cluster
345
346	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
347	mapping_cluster_t * cluster = _get_cluster_base(header);
348	mapping_periph_t * periph = _get_periph_base(header);
349
350	// get cluster coordinates and cluster global index
351	unsigned int procid = _get_procid();
352	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
353	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
354	unsigned int cluster_id = x * Y_SIZE + y;
355
356	// search coprocessor in cluster
357	mapping_periph_t* found = NULL;
358	unsigned int min = cluster[cluster_id].periph_offset;
359	unsigned int max = min + cluster[cluster_id].periphs;
360	unsigned int periph_id;
361	for ( periph_id = min ; periph_id < max ; periph_id++ )
362	{
363	if ( (periph[periph_id].type == PERIPH_TYPE_MWR) &&
364	(periph[periph_id].subtype == coproc_type) )
365	{
366	found = &periph[periph_id];
367	break;
368	}
369	}
370
371	if ( found != NULL )
372	{
373	// get the lock (at most one coproc per cluster)
374	_simple_lock_acquire( &_coproc_lock[cluster_id] );
375
376	// register coproc characteristics in kernel arrays
377	_coproc_type[cluster_id] = coproc_type;
378	_coproc_info[cluster_id] = (found->arg0 & 0xFF) \|
379	(found->arg1 & 0xFF)<<8 \|
380	(found->arg2 & 0xFF)<<16 \|
381	(found->arg3 & 0xFF)<<24 ;
382
383	// returns coprocessor info
384	*coproc_info = _coproc_info[cluster_id];
385
386	// register coprocessor coordinates in task context
387	unsigned int cluster_xy = (x<<Y_WIDTH) + y;
388	_set_context_slot( CTX_COPROC_ID , cluster_xy );
389
390	#if GIET_DEBUG_COPROC
391	_printf("\n[GIET DEBUG COPROC] _sys_coproc_alloc() in cluster[%d,%d]\n"
392	" coproc_info = %x / cluster_xy = %x\n",
393	x , y , *coproc_info , cluster_xy );
394	#endif
395	return 0;
396	}
397	else
398	{
399	_printf("\n[GIET_ERROR] in _sys_coproc_alloc(): no coprocessor "
400	" with type %d available in cluster[%d,%d]\n",
401	coproc_type , x , y );
402	return -1;
403	}
404	} // end _sys_coproc_alloc()
405
406	////////////////////////////////////////////////////////
407	int _sys_coproc_release( unsigned int coproc_reg_index )
408	{
409	// processor coordinates
410	unsigned int procid = _get_procid();
411	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
412	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
413	unsigned int p = procid & ((1<<P_WIDTH)-1);
414
415	// get coprocessor coordinates
416	unsigned int cluster_xy = _get_context_slot( CTX_COPROC_ID );
417	if ( cluster_xy > 0xFF )
418	{
419	_printf("\n[GIET_ERROR] in _sys_coproc_release(): "
420	"no coprocessor allocated to task running on P[%d,%d,%d]\n",
421	x , y , p );
422	return -1;
423	}
424
425	unsigned int cx = cluster_xy >> Y_WIDTH;
426	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
427	unsigned int cluster_id = cx * Y_SIZE + cy;
428	unsigned int info = _coproc_info[cluster_id];
429	unsigned int nb_to = info & 0xFF;
430	unsigned int nb_from = (info>>8) & 0xFF;
431	unsigned int channel;
432
433	// stops coprocessor and communication channels
434	_mwr_set_coproc_register( cluster_xy , coproc_reg_index , 0 );
435	for ( channel = 0 ; channel < (nb_from + nb_to) ; channel++ )
436	{
437	_mwr_set_channel_register( cluster_xy , channel , MWR_CHANNEL_RUNNING , 0 );
438	}
439
440	// deallocates coprocessor coordinates in task context
441	_set_context_slot( CTX_COPROC_ID , 0xFFFFFFFF );
442
443	// release coprocessor lock
444	_simple_lock_release( &_coproc_lock[cluster_id] );
445
446	#if GIET_DEBUG_COPROC
447	_printf("\n[GIET DEBUG COPROC] _sys_coproc_release() in cluster[%d,%d]\n",
448	cx, cy );
449	#endif
450
451	return 0;
452	} // end _sys_coproc_release()
453
454	//////////////////////////////////////////////////////////////
455	int _sys_coproc_channel_init( unsigned int channel,
456	giet_coproc_channel_t* desc )
457	{
458	// processor coordinates
459	unsigned int procid = _get_procid();
460	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
461	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
462	unsigned int p = procid & ((1<<P_WIDTH)-1);
463
464	// get coprocessor coordinates
465	unsigned int cluster_xy = _get_context_slot( CTX_COPROC_ID );
466	if ( cluster_xy > 0xFF )
467	{
468	_printf("\n[GIET_ERROR] in _sys_coproc_channel_init(): "
469	"no coprocessor allocated to task running on P[%d,%d,%d]\n",
470	x , y , p );
471	return -1;
472	}
473
474	// check channel mode
475	unsigned mode = desc->channel_mode;
476	if ( (mode != MODE_MWMR) &&
477	(mode != MODE_DMA_IRQ) &&
478	(mode != MODE_DMA_NO_IRQ) )
479	{
480	_printf("\n[GIET_ERROR] in _sys_coproc_channel_init(): "
481	" illegal mode\n");
482	return -1;
483	}
484
485	// get memory buffer size
486	unsigned int size = desc->buffer_size;
487
488	// physical addresses
489	unsigned long long buffer_paddr;
490	unsigned int buffer_lsb;
491	unsigned int buffer_msb;
492	unsigned long long mwmr_paddr = 0;
493	unsigned int mwmr_lsb;
494	unsigned int mwmr_msb;
495	unsigned long long lock_paddr = 0;
496	unsigned int lock_lsb;
497	unsigned int lock_msb;
498
499	unsigned int flags; // unused
500
501	// compute memory buffer physical address
502	buffer_paddr = _v2p_translate( desc->buffer_vaddr , &flags );
503	buffer_lsb = (unsigned int)buffer_paddr;
504	buffer_msb = (unsigned int)(buffer_paddr>>32);
505
506	// call MWMR_DMA driver
507	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_MODE, mode );
508	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_SIZE, size );
509	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_BUFFER_LSB, buffer_lsb );
510	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_BUFFER_MSB, buffer_msb );
511
512	if ( mode == MODE_MWMR )
513	{
514	// compute MWMR descriptor physical address
515	mwmr_paddr = _v2p_translate( desc->mwmr_vaddr , &flags );
516	mwmr_lsb = (unsigned int)mwmr_paddr;
517	mwmr_msb = (unsigned int)(mwmr_paddr>>32);
518
519	// call MWMR_DMA driver
520	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_MWMR_LSB, mwmr_lsb );
521	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_MWMR_MSB, mwmr_msb );
522
523	// compute lock physical address
524	lock_paddr = _v2p_translate( desc->lock_vaddr , &flags );
525	lock_lsb = (unsigned int)lock_paddr;
526	lock_msb = (unsigned int)(lock_paddr>>32);
527
528	// call MWMR_DMA driver
529	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_LOCK_LSB, lock_lsb );
530	_mwr_set_channel_register( cluster_xy, channel, MWR_CHANNEL_LOCK_MSB, lock_msb );
531	}
532
533	#if GIET_DEBUG_COPROC
534	_printf("\n[GIET DEBUG COPROC] _sys_coproc_channel_init() for coproc[%d,%d]\n"
535	" channel = %d / mode = %d / buffer_size = %d\n"
536	" buffer_paddr = %l / mwmr_paddr = %l / lock_paddr = %l\n",
537	x , y , channel , mode , size ,
538	buffer_paddr, mwmr_paddr, lock_paddr );
539	#endif
540
541	return 0;
542	} // end _sys_coproc_channel_init()
543
544	////////////////////////////////////////////////////
545	int _sys_coproc_run( unsigned int coproc_reg_index )
546	{
547	// processor coordinates
548	unsigned int procid = _get_procid();
549	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
550	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
551	unsigned int p = procid & ((1<<P_WIDTH)-1);
552
553	// get coprocessor coordinates
554	unsigned int cluster_xy = _get_context_slot( CTX_COPROC_ID );
555	if ( cluster_xy > 0xFF )
556	{
557	_printf("\n[GIET_ERROR] in _sys_coproc_run(): "
558	"no coprocessor allocated to task running on P[%d,%d,%d]\n",
559	x , y , p );
560	return -1;
561	}
562
563	unsigned int cx = cluster_xy >> Y_WIDTH;
564	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
565	unsigned int cluster_id = cx * Y_SIZE + cy;
566	unsigned int info = _coproc_info[cluster_id];
567	unsigned int nb_to = info & 0xFF;
568	unsigned int nb_from = (info>>8) & 0xFF;
569	unsigned int mode = 0xFFFFFFFF;
570	unsigned int channel;
571
572	// register coprocessor running mode
573	for ( channel = 0 ; channel < (nb_from + nb_to) ; channel++ )
574	{
575	unsigned int temp;
576	temp = _mwr_get_channel_register( cluster_xy , channel , MWR_CHANNEL_MODE );
577
578	if ( mode == 0xFFFFFFFF )
579	{
580	mode = temp;
581	}
582	else if ( temp != mode )
583	{
584	_printf("\n[GIET_ERROR] P[%d,%d,%d] in _sys_coproc_run() for coprocessor[%d,%d]\n"
585	" all channels don't have the same mode\n", x , y , p , cx , cy );
586	return -1;
587	}
588	}
589	_coproc_mode[cluster_id] = mode;
590
591	// start all communication channels
592	for ( channel = 0 ; channel < (nb_from + nb_to) ; channel++ )
593	{
594	_mwr_set_channel_register( cluster_xy , channel , MWR_CHANNEL_RUNNING , 1 );
595	}
596
597	//////////////////////////////////////////////////////////////////////////
598	if ( (mode == MODE_MWMR) \|\| (mode == MODE_DMA_NO_IRQ) ) // no descheduling
599	{
600	// start coprocessor
601	_mwr_set_coproc_register( cluster_xy , coproc_reg_index , 1 );
602
603	#if GIET_DEBUG_COPROC
604	if ( mode == MODE_MWMR )
605	_printf("\n[GIET DEBUG COPROC] _sys_coproc_run() P[%d,%d,%d] starts coprocessor[%d,%d]\n"
606	" MODE_MWMR at cycle %d\n", x , y , p , cx , cy , _get_proctime() );
607	else
608	_printf("\n[GIET DEBUG COPROC] _sys_coproc_run() P[%d,%d,%d] starts coprocessor[%d,%d]\n"
609	" MODE_DMA_NO_IRQ at cycle %d\n", x , y , p , cx , cy , _get_proctime() );
610	#endif
611
612	return 0;
613	}
614	///////////////////////////////////////////////////////////////////////////
615	else // mode == MODE_DMA_IRQ => descheduling
616	{
617	// set _coproc_gtid
618	unsigned int ltid = _get_current_task_id();
619	_coproc_gtid[cluster_id] = (procid<<16) + ltid;
620
621	// enters critical section
622	unsigned int save_sr;
623	_it_disable( &save_sr );
624
625	// set NORUN_MASK_COPROC bit
626	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
627	unsigned int* ptr = &psched->context[ltid][CTX_NORUN_ID];
628	_atomic_or( ptr , NORUN_MASK_COPROC );
629
630	// start coprocessor
631	_mwr_set_coproc_register( cluster_xy , coproc_reg_index , 1 );
632
633	#if GIET_DEBUG_COPROC
634	_printf("\n[GIET DEBUG COPROC] _sys_coproc_run() P[%d,%d,%d] starts coprocessor[%d,%d]\n"
635	" MODE_DMA_IRQ at cycle %d\n", x , y , p , cx , cy , _get_proctime() );
636	#endif
637
638	// deschedule task
639	_ctx_switch();
640
641	#if GIET_DEBUG_COPROC
642	_printf("\n[GIET DEBUG COPROC] _sys_coproc_run() P[%d,%d,%d] resume\n"
643	" coprocessor[%d,%d] completion at cycle %d\n",
644	x , y , p , cx , cy , _get_proctime() );
645	#endif
646
647	// restore SR
648	_it_restore( &save_sr );
649
650	// return error computed by mwr_isr()
651	return _coproc_error[cluster_id];
652	}
653	} // end _sys_coproc_run()
654
655	///////////////////////////
656	int _sys_coproc_completed()
657	{
658	// processor coordinates
659	unsigned int procid = _get_procid();
660	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
661	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
662	unsigned int p = procid & ((1<<P_WIDTH)-1);
663
664	// get coprocessor coordinates
665	unsigned int cluster_xy = _get_context_slot( CTX_COPROC_ID );
666	if ( cluster_xy > 0xFF )
667	{
668	_printf("\n[GIET_ERROR] in _sys_coproc_completed(): "
669	"no coprocessor allocated to task running on P[%d,%d,%d]\n",
670	x , y , p );
671	return -1;
672	}
673
674	unsigned int cx = cluster_xy >> Y_WIDTH;
675	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
676	unsigned int cluster_id = cx * Y_SIZE + cy;
677	unsigned int mode = _coproc_mode[cluster_id];
678
679	// analyse possible errors
680	if ( mode == MODE_DMA_NO_IRQ )
681	{
682	unsigned int info = _coproc_info[cluster_id];
683	unsigned int nb_to = info & 0xFF;
684	unsigned int nb_from = (info>>8) & 0xFF;
685	unsigned int error = 0;
686	unsigned int channel;
687	unsigned int status;
688
689	// get status for all channels, and signal all reported errors
690	for ( channel = 0 ; channel < (nb_to +nb_from) ; channel++ )
691	{
692	do
693	{
694	status = _mwr_get_channel_register( cluster_xy , channel , MWR_CHANNEL_STATUS );
695	if ( status == MWR_CHANNEL_ERROR_DATA )
696	{
697	_printf("\n[GIET_ERROR] in _sys_coproc_completed()"
698	" / channel %d / DATA_ERROR\n", channel );
699	error = 1;
700	break;
701	}
702	else if ( status == MWR_CHANNEL_ERROR_LOCK )
703	{
704	_printf("\n[GIET_ERROR] in _sys_coproc_completed()"
705	" / channel %d / LOCK_ERROR\n", channel );
706	error = 1;
707	break;
708	}
709	else if ( status == MWR_CHANNEL_ERROR_DESC )
710	{
711	_printf("\n[GIET_ERROR] in _sys_coproc_completed()"
712	" / channel %d / DESC_ERROR\n", channel );
713	error = 1;
714	break;
715	}
716	} while ( status == MWR_CHANNEL_BUSY );
717
718	// reset channel
719	_mwr_set_channel_register( cluster_xy , channel , MWR_CHANNEL_RUNNING , 0 );
720
721	} // end for channels
722
723	#if GIET_DEBUG_COPROC
724	_printf("\n[GIET DEBUG COPROC] _sys_coproc_completed() for coprocessor[%d,%d] error = %d\n",
725	cx , cy , error );
726	#endif
727
728	return error;
729	}
730	else // mode == MODE_MWMR or MODE_DMA_IRQ
731	{
732	_printf("\n[GIET ERROR] sys_coproc_completed() should not be called for "
733	"coprocessor[%d,%d] running in MODE_MWMR or MODE_DMA_IRQ\n", cx , cy );
734	return 1;
735	}
736	} // end _sys_coproc_completed()
737
738
739	//////////////////////////////////////////////////////////////////////////////
740	// TTY related syscall handlers
741	//////////////////////////////////////////////////////////////////////////////
742
743	/////////////////////////////////////////
744	int _sys_tty_alloc( unsigned int shared )
745	{
746	// get a new TTY terminal index
747	unsigned int channel = _atomic_increment( &_tty_channel_allocator, 1 );
748
749	if ( channel >= NB_TTY_CHANNELS )
750	{
751	_atomic_increment( &_tty_channel_allocator , 0xFFFFFFFF );
752	_printf("\n[GIET_ERROR] in _sys_tty_alloc() : not enough TTY channels\n");
753	return -1;
754	}
755
756	// reset kernel buffer for allocated TTY channel
757	_tty_rx_full[channel] = 0;
758
759	// allocate a WTI mailbox to the calling proc if external IRQ
760	unsigned int unused;
761	if ( USE_PIC ) _ext_irq_alloc( ISR_TTY_RX , channel , &unused );
762
763	// update CTX_TTY_ID
764	if ( shared ) // for all tasks in the same vspace
765	{
766	unsigned int vspace_id = _get_context_slot( CTX_VSID_ID );
767	mapping_header_t header = (mapping_header_t )SEG_BOOT_MAPPING_BASE;
768	mapping_vspace_t *vspace = _get_vspace_base(header);
769	mapping_task_t *task = _get_task_base(header);
770
771	// scan tasks in vspace
772	unsigned int task_id;
773	for (task_id = vspace[vspace_id].task_offset;
774	task_id < (vspace[vspace_id].task_offset + vspace[vspace_id].tasks);
775	task_id++)
776	{
777	unsigned int y_size = header->y_size;
778	unsigned int cid = task[task_id].clusterid;
779	unsigned int x = cid / y_size;
780	unsigned int y = cid % y_size;
781	unsigned int p = task[task_id].proclocid;
782	unsigned int ltid = task[task_id].ltid;
783	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
784	psched->context[ltid][CTX_TTY_ID] = channel;
785	}
786	}
787	else // for calling task only
788	{
789	_set_context_slot( CTX_TTY_ID, channel );
790	}
791
792	return 0;
793	}
794
795	/////////////////////////////////////////
796	// NOTE: not a syscall
797	int _sys_tty_release()
798	{
799	// release one TTY terminal
800	_atomic_increment( &_tty_channel_allocator , 0xFFFFFFFF );
801
802	return 0;
803	}
804
805	/////////////////////////////////////////////////
806	int _sys_tty_write( const char* buffer,
807	unsigned int length, // number of characters
808	unsigned int channel) // channel index
809	{
810	unsigned int nwritten;
811
812	// compute and check tty channel
813	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
814	if( channel >= NB_TTY_CHANNELS ) return -1;
815
816	// write string to TTY channel
817	for (nwritten = 0; nwritten < length; nwritten++)
818	{
819	// check tty's status
820	if ( _tty_get_register( channel, TTY_STATUS ) & 0x2 ) break;
821
822	// write one byte
823	if (buffer[nwritten] == '\n')
824	{
825	_tty_set_register( channel, TTY_WRITE, (unsigned int)'\r' );
826	}
827	_tty_set_register( channel, TTY_WRITE, (unsigned int)buffer[nwritten] );
828	}
829
830	return nwritten;
831	}
832
833	////////////////////////////////////////////////
834	int _sys_tty_read( char* buffer,
835	unsigned int length, // unused
836	unsigned int channel) // channel index
837	{
838	// compute and check tty channel
839	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
840	if( channel >= NB_TTY_CHANNELS ) return -1;
841
842	// read one character from TTY channel
843	if (_tty_rx_full[channel] == 0)
844	{
845	return 0;
846	}
847	else
848	{
849	*buffer = _tty_rx_buf[channel];
850	_tty_rx_full[channel] = 0;
851	return 1;
852	}
853	}
854
855	///////////////////////////////////////////
856	int _sys_tty_get_lock( unsigned int channel, // unused
857	unsigned int * save_sr_ptr )
858	{
859	// check tty channel
860	if( channel != 0 ) return 1;
861
862	_it_disable( save_sr_ptr );
863	_sqt_lock_acquire( &_tty0_sqt_lock );
864	return 0;
865	}
866
867	///////////////////////////////////////////////
868	int _sys_tty_release_lock( unsigned int channel,
869	unsigned int * save_sr_ptr )
870	{
871	// check tty channel
872	if( channel != 0 ) return 1;
873
874	_sqt_lock_release( &_tty0_sqt_lock );
875	_it_restore( save_sr_ptr );
876	return 0;
877	}
878
879	//////////////////////////////////////////////////////////////////////////////
880	// TIM related syscall handlers
881	//////////////////////////////////////////////////////////////////////////////
882
883	////////////////////
884	int _sys_tim_alloc()
885	{
886	// get a new timer index
887	unsigned int channel = _atomic_increment( &_tim_channel_allocator, 1 );
888
889	if ( channel >= NB_TIM_CHANNELS )
890	{
891	_printf("\n[GIET_ERROR] in _sys_tim_alloc() : not enough TIM channels\n");
892	return -1;
893	}
894	else
895	{
896	_set_context_slot( CTX_TIM_ID, channel );
897	return 0;
898	}
899	}
900
901	////////////////////
902	// NOTE: not a syscall
903	int _sys_tim_release()
904	{
905	// release one timer
906	_atomic_increment( &_tim_channel_allocator, 0xFFFFFFFF );
907
908	return 0;
909	}
910
911	/////////////////////////////////////////
912	int _sys_tim_start( unsigned int period )
913	{
914	// get timer index
915	unsigned int channel = _get_context_slot( CTX_TIM_ID );
916	if ( channel >= NB_TIM_CHANNELS )
917	{
918	_printf("\n[GIET_ERROR] in _sys_tim_start() : not enough TIM channels\n");
919	return -1;
920	}
921
922	// start timer
923	_timer_start( channel, period );
924
925	return 0;
926	}
927
928	///////////////////
929	int _sys_tim_stop()
930	{
931	// get timer index
932	unsigned int channel = _get_context_slot( CTX_TIM_ID );
933	if ( channel >= NB_TIM_CHANNELS )
934	{
935	_printf("\n[GIET_ERROR] in _sys_tim_stop() : illegal timer index\n");
936	return -1;
937	}
938
939	// stop timer
940	_timer_stop( channel );
941
942	return 0;
943	}
944
945	//////////////////////////////////////////////////////////////////////////////
946	// NIC related syscall handlers
947	//////////////////////////////////////////////////////////////////////////////
948
949	#define NIC_CONTAINER_SIZE 4096
950
951	////////////////////////////////////////
952	int _sys_nic_alloc( unsigned int is_rx,
953	unsigned int xmax,
954	unsigned int ymax )
955	{
956	// check xmax / ymax parameters
957	if ( xmax > X_SIZE )
958	{
959	_printf("\n[GIET_ERROR] in _sys_nic_alloc() xmax argument too large\n");
960	return -1;
961	}
962	if ( ymax > Y_SIZE )
963	{
964	_printf("\n[GIET_ERROR] in _sys_nic_alloc() ymax argument too large\n");
965	return -1;
966	}
967
968	////////////////////////////////////////////////////////
969	// Step 1: get and register CMA and NIC channel index //
970	////////////////////////////////////////////////////////
971
972	// get a NIC_RX or NIC_TX channel index
973	unsigned int nic_channel;
974	unsigned int cma_channel;
975
976	if ( is_rx ) nic_channel = _atomic_increment( &_nic_rx_channel_allocator, 1 );
977	else nic_channel = _atomic_increment( &_nic_tx_channel_allocator, 1 );
978
979	if ( (nic_channel >= NB_NIC_CHANNELS) )
980	{
981	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough NIC channels\n");
982	return -1;
983	}
984
985	// get a CMA channel index
986	cma_channel = _atomic_increment( &_cma_channel_allocator, 1 );
987
988	if ( cma_channel >= NB_CMA_CHANNELS )
989	{
990	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough CMA channels\n");
991	return -1;
992	}
993
994	#if GIET_DEBUG_NIC
995	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
996	_printf("\n[GIET DEBUG NIC] Task %d enters sys_nic_alloc() at cycle %d\n"
997	" nic_channel = %d / cma_channel = %d\n",
998	thread , _get_proctime() , nic_channel , cma_channel );
999	#endif
1000
1001	// register nic_index and cma_index in task context
1002	if ( is_rx )
1003	{
1004	_set_context_slot( CTX_NIC_RX_ID, nic_channel );
1005	_set_context_slot( CTX_CMA_RX_ID, cma_channel );
1006	}
1007	else
1008	{
1009	_set_context_slot( CTX_NIC_TX_ID, nic_channel );
1010	_set_context_slot( CTX_CMA_TX_ID, cma_channel );
1011	}
1012
1013	/////////////////////////////////////////////////////////////////////////////////
1014	// Step 2: loop on all the clusters //
1015	// Allocate the kernel containers and status, compute the container and the //
1016	// status physical addresses, fill and synchronize the kernel CHBUF descriptor //
1017	/////////////////////////////////////////////////////////////////////////////////
1018
1019	// physical addresses to be registered in the CMA registers
1020	unsigned long long nic_chbuf_pbase; // NIC chbuf physical address
1021	unsigned long long ker_chbuf_pbase; // kernel chbuf physical address
1022
1023	// allocate one kernel container and one status variable per cluster in the
1024	// (xmax / ymax) mesh
1025	unsigned int cx; // cluster X coordinate
1026	unsigned int cy; // cluster Y coordinate
1027	unsigned int index; // container index in chbuf
1028	unsigned int vaddr; // virtual address
1029	unsigned long long cont_paddr; // container physical address
1030	unsigned long long sts_paddr; // container status physical address
1031
1032	unsigned int flags; // for _v2p_translate()
1033
1034	for ( cx = 0 ; cx < xmax ; cx++ )
1035	{
1036	for ( cy = 0 ; cy < ymax ; cy++ )
1037	{
1038	// compute index in chbuf
1039	index = (cx * ymax) + cy;
1040
1041	// allocate the kernel container
1042	vaddr = (unsigned int)_remote_malloc( NIC_CONTAINER_SIZE, cx, cy );
1043
1044	if ( vaddr == 0 ) // not enough kernel heap memory in cluster[cx,cy]
1045	{
1046	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough kenel heap"
1047	" in cluster[%d,%d]\n", cx, cy );
1048	return -1;
1049	}
1050
1051	// compute container physical address
1052	cont_paddr = _v2p_translate( vaddr , &flags );
1053
1054	// checking container address alignment
1055	if ( cont_paddr & 0x3F )
1056	{
1057	_printf("\n[GIET ERROR] in _sys_nic_alloc() : container address of cluster[%d,%d] not aligned\n",
1058	cx, cy);
1059	return -1;
1060	}
1061
1062	#if GIET_DEBUG_NIC
1063	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_alloc()\n"
1064	" allocates in cluster[%d,%d]:\n"
1065	" - container vaddr = %x / paddr = %l\n",
1066	thread , cx , cy , vaddr, cont_paddr );
1067	#endif
1068
1069	// allocate the kernel container status
1070	// it occupies 64 bytes but only last bit is useful (1 for full and 0 for empty)
1071	vaddr = (unsigned int)_remote_malloc( 64, cx, cy );
1072
1073	if ( vaddr == 0 ) // not enough kernel heap memory in cluster[cx,cy]
1074	{
1075	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough kenel heap"
1076	" in cluster[%d,%d]\n", cx, cy );
1077	return -1;
1078	}
1079
1080	// compute status physical address
1081	sts_paddr = _v2p_translate( vaddr , &flags );
1082
1083	// checking status address alignment
1084	if ( sts_paddr & 0x3F )
1085	{
1086	_printf("\n[GIET ERROR] in _sys_nic_alloc() : status address of cluster[%d,%d] not aligned\n",
1087	cx, cy);
1088	return -1;
1089	}
1090
1091	// initialize chbuf entry
1092	// The buffer descriptor has the following structure:
1093	// - the 26 LSB bits contain bits[6:31] of the buffer physical address
1094	// - the 26 following bits contain bits[6:31] of the physical address where the
1095	// buffer status is located
1096	// - the 12 MSB bits contain the common address extension of the buffer and its
1097	// status
1098	if ( is_rx )
1099	_nic_ker_rx_chbuf[nic_channel].buf_desc[index] =
1100	(unsigned long long)
1101	((sts_paddr & 0xFFFFFFFFULL) >> 6) +
1102	(((cont_paddr & 0xFFFFFFFFFFFULL) >> 6) << 26);
1103	else
1104	_nic_ker_tx_chbuf[nic_channel].buf_desc[index] =
1105	(unsigned long long)
1106	((sts_paddr & 0xFFFFFFC0ULL) >> 6) +
1107	(((cont_paddr & 0xFFFFFFFFFC0ULL) >> 6) << 26);
1108
1109	#if GIET_DEBUG_NIC
1110	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_alloc()\n"
1111	" - status vaddr = %x / paddr = %l\n"
1112	" Buffer descriptor = %l\n",
1113	thread, vaddr, sts_paddr,
1114	(unsigned long long)((sts_paddr & 0xFFFFFFFFULL) >> 6) +
1115	(((cont_paddr & 0xFFFFFFFFFFFULL) >> 6) << 26) );
1116	#endif
1117	}
1118	}
1119
1120	// complete kernel chbuf initialisation
1121	if ( is_rx )
1122	{
1123	_nic_ker_rx_chbuf[nic_channel].xmax = xmax;
1124	_nic_ker_rx_chbuf[nic_channel].ymax = ymax;
1125	}
1126	else
1127	{
1128	_nic_ker_tx_chbuf[nic_channel].xmax = xmax;
1129	_nic_ker_tx_chbuf[nic_channel].ymax = ymax;
1130	}
1131
1132	// compute the kernel chbuf descriptor physical address
1133	if ( is_rx ) vaddr = (unsigned int)( &_nic_ker_rx_chbuf[nic_channel] );
1134	else vaddr = (unsigned int)( &_nic_ker_tx_chbuf[nic_channel] );
1135
1136	ker_chbuf_pbase = _v2p_translate( vaddr , &flags );
1137
1138	#if GIET_DEBUG_NIC
1139	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_alloc() get kernel chbuf\n"
1140	" vaddr = %x / paddr = %l\n",
1141	thread , vaddr , ker_chbuf_pbase );
1142	#endif
1143
1144	// sync the kernel chbuf in L2 after write in L2
1145	_mmc_sync( ker_chbuf_pbase, sizeof( ker_chbuf_t ) );
1146
1147	///////////////////////////////////////////////////////////////
1148	// Step 3: compute the NIC chbuf descriptor physical address //
1149	///////////////////////////////////////////////////////////////
1150
1151	unsigned int offset;
1152	if ( is_rx ) offset = 0x4100;
1153	else offset = 0x4110;
1154	nic_chbuf_pbase = (((unsigned long long)((X_IO << Y_WIDTH) + Y_IO))<<32) \|
1155	(SEG_NIC_BASE + (nic_channel<<15) + offset);
1156
1157	#if GIET_DEBUG_NIC
1158	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_alloc() get NIC chbuf : paddr = %l\n",
1159	thread , nic_chbuf_pbase );
1160	#endif
1161
1162	////////////////////////////////////////////////////////////////////////////////
1163	// Step 4: initialize CMA registers defining the source & destination chbufs //
1164	////////////////////////////////////////////////////////////////////////////////
1165
1166	if ( is_rx ) // NIC to kernel
1167	{
1168	_cma_set_register( cma_channel, CHBUF_SRC_DESC , (unsigned int)(nic_chbuf_pbase) );
1169	_cma_set_register( cma_channel, CHBUF_SRC_EXT , (unsigned int)(nic_chbuf_pbase>>32) );
1170	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, 2 );
1171	_cma_set_register( cma_channel, CHBUF_DST_DESC , (unsigned int)(ker_chbuf_pbase) );
1172	_cma_set_register( cma_channel, CHBUF_DST_EXT , (unsigned int)(ker_chbuf_pbase>>32) );
1173	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, xmax * ymax );
1174	}
1175	else // kernel to NIC
1176	{
1177	_cma_set_register( cma_channel, CHBUF_SRC_DESC , (unsigned int)(ker_chbuf_pbase) );
1178	_cma_set_register( cma_channel, CHBUF_SRC_EXT , (unsigned int)(ker_chbuf_pbase>>32) );
1179	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, xmax * ymax );
1180	_cma_set_register( cma_channel, CHBUF_DST_DESC , (unsigned int)(nic_chbuf_pbase) );
1181	_cma_set_register( cma_channel, CHBUF_DST_EXT , (unsigned int)(nic_chbuf_pbase>>32) );
1182	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, 2 );
1183	}
1184
1185	#if GIET_DEBUG_NIC
1186	_printf("\n[GIET DEBUG NIC] Task %d exit _sys_nic_alloc() at cycle %d\n",
1187	thread, _get_proctime() );
1188	#endif
1189
1190	return nic_channel;
1191	} // end _sys_nic_alloc()
1192
1193
1194	////////////////////////////////////////
1195	// NOTE: not a syscall
1196	int _sys_nic_release( unsigned int is_rx )
1197	{
1198	if ( is_rx )
1199	_atomic_increment( &_nic_rx_channel_allocator , 0xFFFFFFFF );
1200	else
1201	_atomic_increment( &_nic_tx_channel_allocator , 0xFFFFFFFF );
1202
1203	return 0;
1204	}
1205
1206
1207	////////////////////////////////////////
1208	int _sys_nic_start( unsigned int is_rx,
1209	unsigned int channel )
1210	{
1211	unsigned int nic_channel;
1212	unsigned int cma_channel;
1213
1214	// get NIC channel index and CMA channel index from task context
1215	if ( is_rx )
1216	{
1217	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1218	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
1219	}
1220	else
1221	{
1222	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1223	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
1224	}
1225
1226	#if GIET_DEBUG_NIC
1227	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
1228	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_start() at cycle %d\n"
1229	" get NIC channel = %d / CMA channel = %d\n",
1230	thread, _get_proctime(), nic_channel, cma_channel );
1231	#endif
1232
1233	// check NIC and CMA channels index
1234	if ( nic_channel != channel )
1235	{
1236	_printf("\n[GIET_ERROR] in _sys_nic_start(): illegal NIC channel\n");
1237	return -1;
1238	}
1239	if ( cma_channel >= NB_CMA_CHANNELS )
1240	{
1241	_printf("\n[GIET_ERROR] in _sys_nic_start(): illegal CMA channel\n");
1242	return -1;
1243	}
1244
1245	// start CMA transfer
1246	_cma_set_register( cma_channel, CHBUF_BUF_SIZE , NIC_CONTAINER_SIZE );
1247	_cma_set_register( cma_channel, CHBUF_PERIOD , 0 ); // OUT_OF_ORDER
1248	_cma_set_register( cma_channel, CHBUF_RUN , 1 );
1249
1250	// activates NIC channel
1251	_nic_channel_start( nic_channel, is_rx, GIET_NIC_MAC4, GIET_NIC_MAC2 );
1252
1253	#if GIET_DEBUG_NIC
1254	_printf("\n[GIET DEBUG NIC] Task %d exit _sys_nic_start() at cycle %d\n",
1255	thread , _get_proctime() );
1256	#endif
1257
1258	return 0;
1259	} // end _sys_nic_start()
1260
1261
1262	//////////////////////////////////////
1263	int _sys_nic_move( unsigned int is_rx,
1264	unsigned int channel,
1265	void* buffer )
1266	{
1267
1268	#if GIET_DEBUG_NIC
1269	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
1270	_printf("\n[GIET DEBUG NIC] Task %d enters _sys_nic_move() at cycle %d\n",
1271	thread , _get_proctime() );
1272	#endif
1273
1274	// check NIC channel index
1275	if ( channel >= NB_NIC_CHANNELS )
1276	{
1277	_printf("\n[GIET_ERROR] in _sys_nic_move() : illegal NIC channel index\n");
1278	return -1;
1279	}
1280
1281	// get kernel chbuf virtual address
1282	ker_chbuf_t* ker_chbuf;
1283	if ( is_rx ) ker_chbuf = &_nic_ker_rx_chbuf[channel];
1284	else ker_chbuf = &_nic_ker_tx_chbuf[channel];
1285
1286	// get xmax / ymax parameters
1287	unsigned int xmax = ker_chbuf->xmax;
1288	unsigned int ymax = ker_chbuf->ymax;
1289
1290	// get cluster coordinates for the processor running the calling task
1291	unsigned int procid = _get_procid();
1292	unsigned int cx = procid >> (Y_WIDTH + P_WIDTH);
1293	unsigned int cy = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
1294
1295	// check processor coordinates / (xmax,ymax)
1296	if ( cx >= xmax )
1297	{
1298	_printf("\n[GIET_ERROR] in _sys_nic_move() : processor X coordinate = %d"
1299	" / xmax = %d\n", cx , xmax );
1300	return -1;
1301	}
1302	if ( cy >= ymax )
1303	{
1304	_printf("\n[GIET_ERROR] in _sys_nic_move() : processor Y coordinate = %d"
1305	" / ymax = %d\n", cy , ymax );
1306	return -1;
1307	}
1308
1309	unsigned long long usr_buf_paddr; // user buffer physical address
1310	unsigned long long ker_buf_paddr; // kernel buffer physical address
1311	unsigned long long ker_sts_paddr; // kernel buffer status physical address
1312	unsigned long long ker_buf_desc; // kernel buffer descriptor
1313	unsigned int ker_sts; // kernel buffer status (full or empty)
1314	unsigned int index; // kernel buffer index in chbuf
1315	unsigned int flags; // for _v2P_translate
1316
1317	// Compute user buffer physical address and check access rights
1318	usr_buf_paddr = _v2p_translate( (unsigned int)buffer , &flags );
1319
1320	if ( (flags & PTE_U) == 0 )
1321	{
1322	_printf("\n[GIET ERROR] in _sys_nic_tx_move() : illegal user buffer address\n");
1323	return -1;
1324	}
1325
1326	#if GIET_DEBUG_NIC
1327	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() get user buffer : paddr = %l\n",
1328	thread, usr_buf_paddr );
1329	#endif
1330
1331	// compute buffer index, buffer descriptor paddr and buffer status paddr
1332	index = (ymax * cx) + cy;
1333	ker_buf_desc = ker_chbuf->buf_desc[index];
1334	ker_sts_paddr = ((ker_buf_desc & 0xFFF0000000000000ULL) >> 20) +
1335	((ker_buf_desc & 0x3FFFFFFULL) << 6);
1336
1337	#if GIET_DEBUG_NIC
1338	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() read ker_buf_desc %d at cycle %d\n"
1339	" kernel buffer descriptor = %l\n",
1340	thread, index, _get_proctime(), ker_buf_desc );
1341	#endif
1342
1343	// poll local kernel container status until success
1344	while ( 1 )
1345	{
1346	// inval buffer descriptor in L2 before read in L2
1347	_mmc_inval( ker_sts_paddr, 4 );
1348	ker_sts = _physical_read( ker_sts_paddr );
1349
1350	#if GIET_DEBUG_NIC
1351	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() read ker_buf_sts %d at cycle %d\n"
1352	" paddr = %l / kernel buffer status = %x\n",
1353	thread, index, _get_proctime(), ker_sts_paddr, ker_sts );
1354	#endif
1355
1356	// test buffer status and break if found
1357	if ( ( is_rx != 0 ) && ( ker_sts == 0x1 ) ) break;
1358	if ( ( is_rx == 0 ) && ( ker_sts == 0 ) ) break;
1359	}
1360
1361	// compute kernel buffer physical address
1362	ker_buf_paddr = (ker_buf_desc & 0xFFFFFFFFFC000000ULL) >> 20;
1363
1364	// move one container
1365	if ( is_rx ) // RX transfer
1366	{
1367	// inval kernel buffer in L2 before read in L2
1368	_mmc_inval( ker_buf_paddr, NIC_CONTAINER_SIZE );
1369
1370	// transfer data from kernel buffer to user buffer
1371	_physical_memcpy( usr_buf_paddr,
1372	ker_buf_paddr,
1373	NIC_CONTAINER_SIZE );
1374	#if GIET_DEBUG_NIC
1375	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() transfer kernel buffer %l\n"
1376	" to user buffer %l at cycle %d\n",
1377	thread , ker_buf_paddr , usr_buf_paddr , _get_proctime() );
1378	#endif
1379
1380	}
1381	else // TX transfer
1382	{
1383	// transfer data from user buffer to kernel buffer
1384	_physical_memcpy( ker_buf_paddr,
1385	usr_buf_paddr,
1386	NIC_CONTAINER_SIZE );
1387
1388	// sync kernel buffer in L2 after write in L2
1389	_mmc_sync( ker_buf_paddr, NIC_CONTAINER_SIZE );
1390
1391	#if GIET_DEBUG_NIC
1392	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() transfer "
1393	"user buffer %l to kernel buffer %l at cycle %d\n",
1394	thread , usr_buf_paddr , ker_buf_paddr , _get_proctime() );
1395	#endif
1396
1397	}
1398
1399	// update kernel chbuf status
1400	if ( is_rx ) _physical_write ( ker_sts_paddr, 0 );
1401	else _physical_write ( ker_sts_paddr, 0x1 );
1402
1403	// sync kernel chbuf in L2 after write in L2
1404	_mmc_sync( ker_sts_paddr, 4 );
1405
1406	#if GIET_DEBUG_NIC
1407	_printf("\n[GIET DEBUG NIC] Task %d get buffer %d and exit _sys_nic_move() at cycle %d\n",
1408	thread , index , _get_proctime() );
1409	#endif
1410
1411	return 0;
1412	} // end _sys_nic_move()
1413
1414
1415	////////////////////////////////////////
1416	int _sys_nic_stop( unsigned int is_rx,
1417	unsigned int channel )
1418	{
1419	unsigned int nic_channel;
1420	unsigned int cma_channel;
1421
1422	// get NIC channel index and CMA channel index
1423	if ( is_rx )
1424	{
1425	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1426	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
1427	}
1428	else
1429	{
1430	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1431	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
1432	}
1433
1434	// check NIC and CMA channels index
1435	if ( nic_channel != channel )
1436	{
1437	_printf("\n[GIET_ERROR] in _sys_nic_stop(): illegal NIC channel\n");
1438	return -1;
1439	}
1440	if ( cma_channel >= NB_CMA_CHANNELS )
1441	{
1442	_printf("\n[GIET_ERROR] in _sys_nic_stop(): illegal CMA channel\n");
1443	return -1;
1444	}
1445
1446	// desactivates the NIC channel
1447	_nic_channel_stop( nic_channel, is_rx );
1448
1449	// desactivates the CMA channel
1450	_cma_set_register( cma_channel, CHBUF_RUN , 0 );
1451
1452	return 0;
1453	} // end _sys_nic_stop()
1454
1455	////////////////////////////////////////
1456	int _sys_nic_clear( unsigned int is_rx,
1457	unsigned int channel )
1458	{
1459	unsigned int nic_channel;
1460
1461	// get NIC channel
1462	if ( is_rx ) nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1463	else nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1464
1465	if ( nic_channel != channel )
1466	{
1467	_printf("\n[GIET_ERROR] in _sys_nic_clear(): illegal NIC channel\n");
1468	return -1;
1469	}
1470
1471	if ( is_rx )
1472	{
1473	_nic_set_global_register( NIC_G_NPKT_RX_G2S_RECEIVED , 0 );
1474	_nic_set_global_register( NIC_G_NPKT_RX_DES_TOO_SMALL , 0 );
1475	_nic_set_global_register( NIC_G_NPKT_RX_DES_TOO_BIG , 0 );
1476	_nic_set_global_register( NIC_G_NPKT_RX_DES_MFIFO_FULL , 0 );
1477	_nic_set_global_register( NIC_G_NPKT_RX_DES_CRC_FAIL , 0 );
1478	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_RECEIVED , 0 );
1479	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_BROADCAST , 0 );
1480	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_DST_FAIL , 0 );
1481	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_CH_FULL , 0 );
1482	}
1483	else
1484	{
1485	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_RECEIVED , 0 );
1486	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TRANSMIT , 0 );
1487	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_BIG , 0 );
1488	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_SMALL , 0 );
1489	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_SRC_FAIL , 0 );
1490	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_BYPASS , 0 );
1491	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_BROADCAST , 0 );
1492	}
1493	return 0;
1494	} // en _sys_nic_clear()
1495
1496	////////////////////////////////////////
1497	int _sys_nic_stats( unsigned int is_rx,
1498	unsigned int channel )
1499	{
1500	unsigned int nic_channel;
1501
1502	// get NIC channel
1503	if ( is_rx ) nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1504	else nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1505
1506	if ( nic_channel != channel )
1507	{
1508	_printf("\n[GIET_ERROR] in _sys_nic_stats(): illegal NIC channel\n");
1509	return -1;
1510	}
1511
1512	if ( is_rx )
1513	{
1514	unsigned int received = _nic_get_global_register( NIC_G_NPKT_RX_G2S_RECEIVED );
1515	unsigned int too_small = _nic_get_global_register( NIC_G_NPKT_RX_DES_TOO_SMALL );
1516	unsigned int too_big = _nic_get_global_register( NIC_G_NPKT_RX_DES_TOO_BIG );
1517	unsigned int fifo_full = _nic_get_global_register( NIC_G_NPKT_RX_DES_MFIFO_FULL );
1518	unsigned int crc_fail = _nic_get_global_register( NIC_G_NPKT_RX_DES_CRC_FAIL );
1519	unsigned int broadcast = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_BROADCAST );
1520	unsigned int dst_fail = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_DST_FAIL );
1521	unsigned int ch_full = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_CH_FULL );
1522
1523	_printf("\n### Network Controller RX Statistics ###\n"
1524	"- packets received : %d\n"
1525	"- too small : %d\n"
1526	"- too big : %d\n"
1527	"- fifo full : %d\n"
1528	"- crc fail : %d\n"
1529	"- dst mac fail : %d\n"
1530	"- channel full : %d\n"
1531	"- broadcast : %d\n",
1532	received,
1533	too_small,
1534	too_big,
1535	fifo_full,
1536	crc_fail,
1537	dst_fail,
1538	ch_full,
1539	broadcast );
1540	}
1541	else
1542	{
1543	unsigned int received = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_RECEIVED );
1544	unsigned int too_big = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_BIG );
1545	unsigned int too_small = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_SMALL );
1546	unsigned int src_fail = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_SRC_FAIL );
1547	unsigned int bypass = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_BYPASS );
1548	unsigned int broadcast = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_BROADCAST );
1549
1550	_printf("\n### Network Controller TX Statistics ###\n"
1551	"- packets received : %d\n"
1552	"- too small : %d\n"
1553	"- too big : %d\n"
1554	"- src mac fail : %d\n"
1555	"- bypass : %d\n"
1556	"- broadcast : %d\n",
1557	received,
1558	too_big,
1559	too_small,
1560	src_fail,
1561	bypass,
1562	broadcast );
1563	}
1564	return 0;
1565	} // end _sys_nic_stats()
1566
1567	/////////////////////////////////////////////////////////////////////////////////////////
1568	// FBF related syscall handlers
1569	/////////////////////////////////////////////////////////////////////////////////////////
1570
1571	/////////////////////////////////////////////
1572	int _sys_fbf_sync_write( unsigned int offset,
1573	void* buffer,
1574	unsigned int length )
1575	{
1576	char* fbf_address = (char *)SEG_FBF_BASE + offset;
1577	memcpy( fbf_address, buffer, length);
1578
1579	return 0;
1580	}
1581
1582	/////////////////////////////////////////////
1583	int _sys_fbf_sync_read( unsigned int offset,
1584	void* buffer,
1585	unsigned int length )
1586	{
1587	char* fbf_address = (char *)SEG_FBF_BASE + offset;
1588	memcpy( buffer, fbf_address, length);
1589
1590	return 0;
1591	}
1592
1593	////////////////////////
1594	int _sys_fbf_cma_alloc()
1595	{
1596	// get a new CMA channel index
1597	unsigned int channel = _atomic_increment( &_cma_channel_allocator, 1 );
1598
1599	if ( channel >= NB_CMA_CHANNELS )
1600	{
1601	_printf("\n[GIET ERROR] in _sys_fbf_cma_alloc() : not enough CMA channels\n");
1602	return -1;
1603	}
1604	else
1605	{
1606	_set_context_slot( CTX_CMA_FB_ID, channel );
1607	return 0;
1608	}
1609	} // end sys_fbf_cma_alloc()
1610
1611
1612	///////////////////////////////////////////////////
1613	int _sys_fbf_cma_init_buf( void* buf0_vbase,
1614	void* buf1_vbase,
1615	void* sts0_vaddr,
1616	void* sts1_vaddr )
1617	{
1618	#if NB_CMA_CHANNELS > 0
1619
1620	unsigned int vaddr; // virtual address
1621	unsigned int flags; // for _v2p_translate()
1622	unsigned long long fbf_paddr; // fbf physical address
1623	unsigned long long fbf_sts_paddr; // fbf status physical address
1624	unsigned long long buf0_pbase; // buffer 0 base physical address
1625	unsigned long long sts0_paddr; // buffer 0 status physical address
1626	unsigned long long buf1_pbase; // buffer 1 base physical address
1627	unsigned long long sts1_paddr; // buffer 1 status physical address
1628
1629	// get channel index
1630	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1631
1632	if ( channel >= NB_CMA_CHANNELS )
1633	{
1634	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : CMA channel index too large\n");
1635	return -1;
1636	}
1637
1638	#if GIET_DEBUG_FBF_CMA
1639	_printf("\n[FBF_CMA DEBUG] enters _sys_fbf_cma_init_buf()\n"
1640	" - channel = %d\n"
1641	" - buf0 vbase = %x\n"
1642	" - buf1 vbase = %x\n"
1643	" - sts0 vaddr = %x\n"
1644	" - sts1 vaddr = %x\n",
1645	channel,
1646	(unsigned int)buf0_vbase,
1647	(unsigned int)buf1_vbase,
1648	(unsigned int)sts0_vaddr,
1649	(unsigned int)sts1_vaddr );
1650	#endif
1651
1652	// checking user buffers virtual addresses alignment
1653	if ( ((unsigned int)buf0_vbase & 0x3F) \|\|
1654	((unsigned int)buf1_vbase & 0x3F) )
1655	{
1656	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : user buffer not aligned\n");
1657	return -1;
1658	}
1659
1660	// checking user buffers status virtual addresses alignment
1661	if ( ((unsigned int)sts0_vaddr & 0x3F) \|\|
1662	((unsigned int)sts1_vaddr & 0x3F) )
1663	{
1664	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : user status not aligned\n");
1665	return -1;
1666	}
1667
1668	// compute frame buffer physical address and initialize _fbf_chbuf[channel]
1669	vaddr = (unsigned int)SEG_FBF_BASE;
1670	fbf_paddr = _v2p_translate( vaddr , &flags );
1671	vaddr = (unsigned int)&_fbf_status[channel];
1672	fbf_sts_paddr = _v2p_translate( vaddr , &flags );
1673
1674	_fbf_chbuf[channel].fbf_desc =
1675	(unsigned long long) ((fbf_sts_paddr & 0xFFFFFFFFULL) >> 6) +
1676	(((fbf_paddr & 0xFFFFFFFFULL) >> 6 ) << 26);
1677
1678	// Compute user buffer 0 physical addresses and intialize _fbf_chbuf[channel]
1679	vaddr = (unsigned int)buf0_vbase;
1680	buf0_pbase = _v2p_translate( vaddr , &flags );
1681	if ((flags & PTE_U) == 0)
1682	{
1683	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : buf0 not in user space\n");
1684	return -1;
1685	}
1686
1687	vaddr = (unsigned int)sts0_vaddr;
1688	sts0_paddr = _v2p_translate( vaddr , &flags );
1689	if ((flags & PTE_U) == 0)
1690	{
1691	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : sts0 not in user space\n");
1692	return -1;
1693	}
1694
1695	_fbf_chbuf[channel].buf0_desc =
1696	(unsigned long long) ((sts0_paddr & 0xFFFFFFFFULL) >> 6) +
1697	(((buf0_pbase & 0xFFFFFFFFULL) >> 6 ) << 26);
1698
1699	// Compute user buffer 1 physical addresses and intialize _fbf_chbuf[channel]
1700	vaddr = (unsigned int)buf1_vbase;
1701	buf1_pbase = _v2p_translate( vaddr , &flags );
1702	if ((flags & PTE_U) == 0)
1703	{
1704	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : buf1 not in user space\n");
1705	return -1;
1706	}
1707
1708	vaddr = (unsigned int)sts1_vaddr;
1709	sts1_paddr = _v2p_translate( vaddr , &flags );
1710	if ((flags & PTE_U) == 0)
1711	{
1712	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : sts1 not in user space\n");
1713	return -1;
1714	}
1715
1716	_fbf_chbuf[channel].buf1_desc =
1717	(unsigned long long) ((sts1_paddr & 0xFFFFFFFFULL) >> 6) +
1718	(((buf1_pbase & 0xFFFFFFFFULL) >> 6 ) << 26);
1719
1720	// Compute and register physical adress of the fbf_chbuf descriptor
1721	vaddr = (unsigned int)&_fbf_chbuf[channel];
1722	_fbf_chbuf_paddr[channel] = _v2p_translate( vaddr , &flags );
1723
1724	#if GIET_DEBUG_FBF_CMA
1725	_printf(" - fbf pbase = %l\n"
1726	" - fbf status paddr = %l\n"
1727	" - buf0 pbase = %l\n"
1728	" - buf0 status paddr = %l\n"
1729	" - buf1 pbase = %l\n"
1730	" - buf0 status paddr = %l\n"
1731	" - chbuf pbase = %l\n",
1732	fbf_paddr,
1733	fbf_sts_paddr,
1734	buf0_pbase,
1735	sts0_paddr,
1736	buf1_pbase,
1737	sts1_paddr,
1738	_fbf_chbuf_paddr[channel] );
1739	#endif
1740
1741	return 0;
1742
1743	#else
1744
1745	_printf("\n[GIET ERROR] in _sys_fbf_cma_init_buf() : NB_CMA_CHANNELS = 0\n");
1746	return -1;
1747
1748	#endif
1749	} // end sys_fbf_cma_init_buf()
1750
1751	////////////////////////////////////////////
1752	int _sys_fbf_cma_start( unsigned int length )
1753	{
1754	#if NB_CMA_CHANNELS > 0
1755
1756	// get channel index
1757	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1758
1759	if ( channel >= NB_CMA_CHANNELS )
1760	{
1761	_printf("\n[GIET ERROR] in _fbf_cma_start() : CMA channel index too large\n");
1762	return -1;
1763	}
1764
1765	// check buffers initialization
1766	if ( ( _fbf_chbuf[channel].buf0_desc == 0x0ULL ) &&
1767	( _fbf_chbuf[channel].buf1_desc == 0x0ULL) &&
1768	( _fbf_chbuf[channel].fbf_desc == 0x0ULL) )
1769	{
1770	_printf("\n[GIET ERROR] in _sys_fbf_cma_start() :\n"
1771	"Buffer initialization has not been done\n");
1772	return -1;
1773	}
1774
1775	// initializes buffer length
1776	_fbf_chbuf[channel].length = length;
1777
1778	if ( USE_IOB )
1779	{
1780	// SYNC request for fbf_chbuf descriptor
1781	_mmc_sync( _fbf_chbuf_paddr[channel] , sizeof( fbf_chbuf_t ) );
1782	}
1783
1784	// start CMA transfer
1785	unsigned long long paddr = _fbf_chbuf_paddr[channel];
1786	unsigned int src_chbuf_paddr_lsb = (unsigned int)(paddr & 0xFFFFFFFF);
1787	unsigned int src_chbuf_paddr_ext = (unsigned int)(paddr >> 32);
1788	unsigned int dst_chbuf_paddr_lsb = src_chbuf_paddr_lsb + 16;
1789	unsigned int dst_chbuf_paddr_ext = src_chbuf_paddr_ext;
1790
1791	_cma_set_register( channel, CHBUF_SRC_DESC , src_chbuf_paddr_lsb );
1792	_cma_set_register( channel, CHBUF_SRC_EXT , src_chbuf_paddr_ext );
1793	_cma_set_register( channel, CHBUF_SRC_NBUFS, 2 );
1794	_cma_set_register( channel, CHBUF_DST_DESC , dst_chbuf_paddr_lsb );
1795	_cma_set_register( channel, CHBUF_DST_EXT , dst_chbuf_paddr_ext );
1796	_cma_set_register( channel, CHBUF_DST_NBUFS, 1 );
1797	_cma_set_register( channel, CHBUF_BUF_SIZE , length );
1798	_cma_set_register( channel, CHBUF_PERIOD , 300 );
1799	_cma_set_register( channel, CHBUF_RUN , 1 );
1800
1801	return 0;
1802
1803	#else
1804
1805	_printf("\n[GIET ERROR] in _sys_fbf_cma_start() : NB_CMA_CHANNELS = 0\n");
1806	return -1;
1807
1808	#endif
1809	} // end _sys_fbf_cma_start()
1810
1811	/////////////////////////////////////////////////////
1812	int _sys_fbf_cma_display( unsigned int buffer_index )
1813	{
1814	#if NB_CMA_CHANNELS > 0
1815
1816	volatile unsigned int full = 1;
1817
1818	// get channel index
1819	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1820
1821	if ( channel >= NB_CMA_CHANNELS )
1822	{
1823	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : "
1824	"CMA channel index too large\n");
1825	return -1;
1826	}
1827
1828	// get fbf_chbuf descriptor pointer
1829	fbf_chbuf_t* pdesc = &_fbf_chbuf[channel];
1830
1831	#if GIET_DEBUG_FBF_CMA
1832	_printf("\n[FBF_CMA DEBUG] enters _sys_fb_cma_display()\n"
1833	" - cma channel = %d\n"
1834	" - buffer index = %d\n"
1835	" - buf0_desc value = %l\n"
1836	" - buf1_desc value = %l\n"
1837	" - fbf_desc value = %l\n",
1838	channel , buffer_index,
1839	_fbf_chbuf[channel].buf0_desc,
1840	_fbf_chbuf[channel].buf1_desc,
1841	_fbf_chbuf[channel].fbf_desc );
1842	#endif
1843
1844	unsigned long long buf_sts_paddr;
1845	unsigned long long buf_paddr;
1846	unsigned long long fbf_sts_paddr;
1847
1848	if ( buffer_index == 0 ) // user buffer 0
1849	{
1850	buf_sts_paddr =
1851	((pdesc->buf0_desc & 0xFFF0000000000000ULL) >> 20) + // compute address extension
1852	((pdesc->buf0_desc & 0x3FFFFFFULL) << 6); // compute 32 LSB of the address
1853
1854	buf_paddr =
1855	(pdesc->buf0_desc & 0xFFFFFFFFFC000000ULL) >> 20; // compute the entire address
1856	}
1857	else // user buffer 1
1858	{
1859	buf_sts_paddr =
1860	((pdesc->buf1_desc & 0xFFF0000000000000ULL) >> 20) +
1861	((pdesc->buf1_desc & 0x3FFFFFFULL) << 6);
1862
1863	buf_paddr =
1864	(pdesc->buf1_desc & 0xFFFFFFFFFC000000ULL) >> 20;
1865	}
1866
1867	fbf_sts_paddr =
1868	((pdesc->fbf_desc & 0xFFF0000000000000ULL) >> 20) +
1869	((pdesc->fbf_desc & 0x3FFFFFFULL) << 6);
1870
1871	#if GIET_DEBUG_FBF_CMA
1872	_printf(" - fbf status paddr = %l\n"
1873	" - buf pbase = %l\n"
1874	" - buf status paddr = %l\n",
1875	fbf_sts_paddr,
1876	buf_paddr,
1877	buf_sts_paddr );
1878	#endif
1879
1880	// waiting user buffer released by the CMA component)
1881	while ( full )
1882	{
1883	// INVAL L2 cache copy of user buffer status
1884	// because it has been modified in RAM by the CMA component
1885	_mmc_inval( buf_sts_paddr , 4 );
1886
1887	full = _physical_read( buf_sts_paddr );
1888	}
1889
1890	// SYNC request for the user buffer, because
1891	// it will be read from XRAM by the CMA component
1892	_mmc_sync( buf_paddr , pdesc->length );
1893
1894	// set user buffer status
1895	_physical_write( buf_sts_paddr, 0x1 );
1896
1897	// reset fbf buffer status
1898	_physical_write( fbf_sts_paddr, 0x0 );
1899
1900	// SYNC request, because these buffer descriptors
1901	// will be read from XRAM by the CMA component
1902	_mmc_sync( buf_sts_paddr, 4 );
1903	_mmc_sync( fbf_sts_paddr, 4 );
1904
1905	return 0;
1906
1907	#else
1908
1909	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : no CMA channel allocated\n");
1910	return -1;
1911
1912	#endif
1913	} // end _sys_fbf_cma_display()
1914
1915	///////////////////////
1916	int _sys_fbf_cma_stop()
1917	{
1918	#if NB_CMA_CHANNELS > 0
1919
1920	// get channel index
1921	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1922
1923	if ( channel >= NB_CMA_CHANNELS )
1924	{
1925	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : CMA channel index too large\n");
1926	return -1;
1927	}
1928
1929	// Desactivate CMA channel
1930	_cma_set_register( channel, CHBUF_RUN, 0 );
1931
1932	return 0;
1933
1934	#else
1935
1936	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : no CMA channel allocated\n");
1937	return -1;
1938
1939	#endif
1940	} // end _sys_fbf_cma_stop()
1941
1942
1943	//////////////////////////////////////////////////////////////////////////////
1944	// Miscelaneous syscall handlers
1945	//////////////////////////////////////////////////////////////////////////////
1946
1947	///////////////
1948	int _sys_ukn()
1949	{
1950	_printf("\n[GIET ERROR] Undefined System Call / EPC = %x\n", _get_epc() );
1951	return -1;
1952	}
1953
1954	////////////////////////////////////
1955	int _sys_proc_xyp( unsigned int* x,
1956	unsigned int* y,
1957	unsigned int* p )
1958	{
1959	unsigned int gpid = _get_procid(); // global processor index from CPO register
1960
1961	*x = (gpid >> (Y_WIDTH + P_WIDTH)) & ((1<<X_WIDTH)-1);
1962	*y = (gpid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
1963	*p = gpid & ((1<<P_WIDTH)-1);
1964
1965	return 0;
1966	}
1967
1968	//////////////////////////////////
1969	int _sys_task_exit( char* string )
1970	{
1971	unsigned int date = _get_proctime();
1972
1973	unsigned int gpid = _get_procid();
1974	unsigned int cluster_xy = gpid >> P_WIDTH;
1975	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1976	unsigned int x = cluster_xy >> Y_WIDTH;
1977	unsigned int p = gpid & ((1<<P_WIDTH)-1);
1978
1979	unsigned int ltid = _get_context_slot(CTX_LTID_ID);
1980
1981	// print exit message
1982	_printf("\n[GIET] Exit task %d on processor[%d,%d,%d] at cycle %d"
1983	"\n Cause : %s\n\n",
1984	ltid, x, y, p, date, string );
1985
1986	// set NORUN_MASK_TASK bit (non runnable state)
1987	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
1988	unsigned int* ptr = &psched->context[ltid][CTX_NORUN_ID];
1989	_atomic_or( ptr , NORUN_MASK_TASK );
1990
1991	// deschedule
1992	_sys_context_switch();
1993
1994	return 0;
1995	}
1996
1997	/////////////////////////
1998	int _sys_context_switch()
1999	{
2000	unsigned int save_sr;
2001
2002	_it_disable( &save_sr );
2003	_ctx_switch();
2004	_it_restore( &save_sr );
2005
2006	return 0;
2007	}
2008
2009	////////////////////////
2010	int _sys_local_task_id()
2011	{
2012	return _get_context_slot(CTX_LTID_ID);
2013	}
2014
2015	/////////////////////////
2016	int _sys_global_task_id()
2017	{
2018	return _get_context_slot(CTX_GTID_ID);
2019	}
2020
2021	////////////////////
2022	int _sys_thread_id()
2023	{
2024	return _get_context_slot(CTX_TRDID_ID);
2025	}
2026
2027	////////////////////////////////////////////
2028	int _sys_procs_number( unsigned int* x_size,
2029	unsigned int* y_size,
2030	unsigned int* nprocs )
2031	{
2032	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2033	mapping_cluster_t * cluster = _get_cluster_base(header);
2034
2035	unsigned int x;
2036	unsigned int y;
2037	unsigned int okmin = 1;
2038	unsigned int okmax = 1;
2039
2040	// compute max values
2041	unsigned int xmax = header->x_size;
2042	unsigned int ymax = header->y_size;
2043	unsigned int procs = cluster[0].procs;
2044
2045	// check the (ymax-1) lower rows
2046	for ( y = 0 ; y < ymax-1 ; y++ )
2047	{
2048	for ( x = 0 ; x < xmax ; x++ )
2049	{
2050	if (cluster[x*ymax+y].procs != procs ) okmin = 0;
2051	}
2052	}
2053
2054	// check the upper row
2055	for ( x = 0 ; x < xmax ; x++ )
2056	{
2057	if (cluster[x*ymax+ymax-1].procs != procs ) okmax = 0;
2058	}
2059
2060	// return values
2061	if ( okmin && okmax )
2062	{
2063	*x_size = xmax;
2064	*y_size = ymax;
2065	*nprocs = procs;
2066	}
2067	else if ( okmin )
2068	{
2069	*x_size = xmax;
2070	*y_size = ymax-1;
2071	*nprocs = procs;
2072	}
2073	else
2074	{
2075	*x_size = 0;
2076	*y_size = 0;
2077	*nprocs = 0;
2078	}
2079	return 0;
2080	}
2081
2082	///////////////////////////////////////////////////////
2083	int _sys_vseg_get_vbase( char* vspace_name,
2084	char* vseg_name,
2085	unsigned int* vbase )
2086	{
2087	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2088	mapping_vspace_t * vspace = _get_vspace_base(header);
2089	mapping_vseg_t * vseg = _get_vseg_base(header);
2090
2091	unsigned int vspace_id;
2092	unsigned int vseg_id;
2093
2094	// scan vspaces
2095	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
2096	{
2097	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
2098	{
2099	// scan vsegs
2100	for (vseg_id = vspace[vspace_id].vseg_offset;
2101	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
2102	vseg_id++)
2103	{
2104	if (_strncmp(vseg[vseg_id].name, vseg_name, 31) == 0)
2105	{
2106	*vbase = vseg[vseg_id].vbase;
2107	return 0;
2108	}
2109	}
2110	}
2111	}
2112	return -1; // not found
2113	}
2114
2115	/////////////////////////////////////////////////////////
2116	int _sys_vseg_get_length( char* vspace_name,
2117	char* vseg_name,
2118	unsigned int* length )
2119	{
2120	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2121	mapping_vspace_t * vspace = _get_vspace_base(header);
2122	mapping_vseg_t * vseg = _get_vseg_base(header);
2123
2124	unsigned int vspace_id;
2125	unsigned int vseg_id;
2126
2127	// scan vspaces
2128	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
2129	{
2130	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
2131	{
2132	// scan vsegs
2133	for (vseg_id = vspace[vspace_id].vseg_offset;
2134	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
2135	vseg_id++)
2136	{
2137	if (_strncmp(vseg[vseg_id].name, vseg_name, 31) == 0)
2138	{
2139	*length = vseg[vseg_id].length;
2140	return 0;
2141	}
2142	}
2143	}
2144	}
2145	return -1; // not found
2146	}
2147
2148	////////////////////////////////////////
2149	int _sys_xy_from_ptr( void* ptr,
2150	unsigned int* x,
2151	unsigned int* y )
2152	{
2153	unsigned int flags;
2154	unsigned long long paddr = _v2p_translate( (unsigned int)ptr , &flags );
2155
2156	*x = (paddr>>36) & 0xF;
2157	*y = (paddr>>32) & 0xF;
2158
2159	return 0;
2160	}
2161
2162	/////////////////////////////////////////
2163	int _sys_heap_info( unsigned int* vaddr,
2164	unsigned int* length,
2165	unsigned int x,
2166	unsigned int y )
2167	{
2168	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2169	mapping_task_t * task = _get_task_base(header);
2170	mapping_vseg_t * vseg = _get_vseg_base(header);
2171	mapping_vspace_t * vspace = _get_vspace_base(header);
2172
2173	unsigned int task_id;
2174	unsigned int vspace_id;
2175	unsigned int vseg_id = 0xFFFFFFFF;
2176
2177	// searching the heap vseg
2178	if ( (x < X_SIZE) && (y < Y_SIZE) ) // searching a task in cluster(x,y)
2179	{
2180	// get vspace global index
2181	vspace_id = _get_context_slot(CTX_VSID_ID);
2182
2183	// scan all tasks in vspace
2184	unsigned int min = vspace[vspace_id].task_offset ;
2185	unsigned int max = min + vspace[vspace_id].tasks ;
2186	for ( task_id = min ; task_id < max ; task_id++ )
2187	{
2188	if ( task[task_id].clusterid == (x * Y_SIZE + y) )
2189	{
2190	vseg_id = task[task_id].heap_vseg_id;
2191	if ( vseg_id != 0xFFFFFFFF ) break;
2192	}
2193	}
2194	}
2195	else // searching in the calling task
2196	{
2197	task_id = _get_context_slot(CTX_GTID_ID);
2198	vseg_id = task[task_id].heap_vseg_id;
2199	}
2200
2201	// analysing the vseg_id
2202	if ( vseg_id != 0xFFFFFFFF )
2203	{
2204	*vaddr = vseg[vseg_id].vbase;
2205	*length = vseg[vseg_id].length;
2206	return 0;
2207	}
2208	else
2209	{
2210	*vaddr = 0;
2211	*length = 0;
2212	return -1;
2213	}
2214	} // end _sys_heap_info()
2215
2216
2217	///////////////////////
2218	int _sys_tasks_status()
2219	{
2220	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
2221	mapping_task_t * task = _get_task_base(header);
2222	mapping_vspace_t * vspace = _get_vspace_base(header);
2223	mapping_cluster_t * cluster = _get_cluster_base(header);
2224
2225	unsigned int task_id;
2226	unsigned int vspace_id;
2227
2228	// scan all vspaces
2229	for( vspace_id = 0 ; vspace_id < header->vspaces ; vspace_id++ )
2230	{
2231	_printf("\n*** vspace %s\n", vspace[vspace_id].name );
2232
2233	// scan all tasks in vspace
2234	unsigned int min = vspace[vspace_id].task_offset ;
2235	unsigned int max = min + vspace[vspace_id].tasks ;
2236	for ( task_id = min ; task_id < max ; task_id++ )
2237	{
2238	unsigned int clusterid = task[task_id].clusterid;
2239	unsigned int p = task[task_id].proclocid;
2240	unsigned int x = cluster[clusterid].x;
2241	unsigned int y = cluster[clusterid].y;
2242	unsigned int ltid = task[task_id].ltid;
2243	static_scheduler_t* psched = (static_scheduler_t*)_schedulers[x][y][p];
2244	unsigned int norun = psched->context[ltid][CTX_NORUN_ID];
2245	unsigned int current = psched->current;
2246
2247	if ( current == ltid )
2248	_printf(" - task %s on P[%d,%d,%d] : running\n", task[task_id].name, x, y, p );
2249	else if ( norun == 0 )
2250	_printf(" - task %s on P[%d,%d,%d] : runable\n", task[task_id].name, x, y, p );
2251	else
2252	_printf(" - task %s on P[%d,%d,%d] : blocked\n", task[task_id].name, x, y, p );
2253	}
2254	}
2255	return 0;
2256	} // end _sys_tasks_status()
2257
2258
2259
2260	// Local Variables:
2261	// tab-width: 4
2262	// c-basic-offset: 4
2263	// c-file-offsets:((innamespace . 0)(inline-open . 0))
2264	// indent-tabs-mode: nil
2265	// End:
2266	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
2267

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