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source: soft/giet_vm/giet_kernel/sys_handler.c @ 455

Last change on this file since 455 was 449, checked in by alain, 10 years ago
Introducing the CMA_RX, CMA_TX, NIC_RX, NIC_TX slots in the task context. This allows an user task to have a private NIC channel and a private CMA channel.
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File size: 34.5 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 <ioc_driver.h>
12	#include <nic_driver.h>
13	#include <mmc_driver.h>
14	#include <cma_driver.h>
15	#include <ctx_handler.h>
16	#include <fat32.h>
17	#include <utils.h>
18	#include <kernel_utils.h>
19	#include <vmem.h>
20	#include <hard_config.h>
21	#include <giet_config.h>
22	#include <mapping_info.h>
23
24	#if !defined(SEG_BOOT_MAPPING_BASE)
25	# error: You must define SEG_BOOT_MAPPING_BASE in the hard_config.h file
26	#endif
27
28	#if !defined(NB_TTY_CHANNELS)
29	# error: You must define NB_TTY_CHANNELS in the hard_config.h file
30	#endif
31
32	#if !defined(NB_TIM_CHANNELS)
33	# error: You must define NB_TIM_CHANNELS in the hard_config.h file
34	#endif
35
36	#if !defined(NB_NIC_CHANNELS)
37	# error: You must define NB_NIC_CHANNELS in the hard_config.h file
38	#endif
39
40	#if !defined(NB_CMA_CHANNELS)
41	# error: You must define NB_CMA_CHANNELS in the hard_config.h file
42	#endif
43
44	#if !defined(GIET_NIC_CHBUF_NBUFS)
45	# error: You must define GIET_NIC_CHBUF_NBUFS in the giet_config.h file
46	#endif
47
48	#if !defined(GIET_NIC_CHBUF_SIZE)
49	# error: You must define GIET_NIC_CHBUF_SIZE in the giet_config.h file
50	#endif
51
52	#if !defined(GIET_NIC_CHBUF_TIMEOUT)
53	# error: You must define GIET_NIC_CHBUF_TIMEOUT in the giet_config.h file
54	#endif
55
56
57	////////////////////////////////////////////////////////////////////////////
58	// Channel allocators for peripherals
59	// (TTY[0] is reserved for kernel)
60	////////////////////////////////////////////////////////////////////////////
61
62	unsigned int _tty_channel_allocator = 1;
63	unsigned int _tim_channel_allocator = 0;
64	unsigned int _cma_channel_allocator = 0;
65	unsigned int _nic_rx_channel_allocator = 0;
66	unsigned int _nic_tx_channel_allocator = 0;
67
68
69	////////////////////////////////////////////////////////////////////////////
70	// NIC_RX and NIC_TX chbuf arrays
71	////////////////////////////////////////////////////////////////////////////
72
73	nic_chbuf_t _nic_rx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(8)));
74	nic_chbuf_t _nic_tx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(8)));
75
76
77	////////////////////////////////////////////////////////////////////////////
78	// Initialize the syscall vector with syscall handlers
79	// Note: This array must be synchronised with the define in file stdio.h
80	////////////////////////////////////////////////////////////////////////////
81	const void * _syscall_vector[64] =
82	{
83	&_sys_proc_xyp, /* 0x00 */
84	&_get_proctime, /* 0x01 */
85	&_sys_tty_write, /* 0x02 */
86	&_sys_tty_read, /* 0x03 */
87	&_sys_tty_alloc, /* 0x04 */
88	&_sys_tty_get_lock, /* 0x05 */
89	&_sys_tty_release_lock, /* 0x06 */
90	&_sys_heap_info, /* 0x07 */
91	&_sys_local_task_id, /* 0x08 */
92	&_sys_global_task_id, /* 0x09 */
93	&_sys_fbf_cma_alloc, /* 0x0A */
94	&_sys_fbf_cma_start, /* 0x0B */
95	&_sys_fbf_cma_display, /* 0x0C */
96	&_sys_fbf_cma_stop, /* 0x0D */
97	&_sys_task_exit, /* 0x0E */
98	&_sys_procs_number, /* 0x0F */
99
100	&_sys_fbf_sync_write, /* 0x10 */
101	&_sys_fbf_sync_read, /* 0x11 */
102	&_sys_thread_id, /* 0x12 */
103	&_sys_ukn, /* 0x13 */
104	&_sys_tim_alloc, /* 0x14 */
105	&_sys_tim_start, /* 0x15 */
106	&_sys_tim_stop, /* 0x16 */
107	&_sys_ukn, /* 0x17 */
108	&_sys_ukn, /* 0x18 */
109	&_context_switch, /* 0x19 */
110	&_sys_vobj_get_vbase, /* 0x1A */
111	&_sys_vobj_get_length, /* 0x1B */
112	&_sys_xy_from_ptr, /* 0x1C */
113	&_sys_ukn, /* 0x1D */
114	&_sys_ukn, /* 0x1E */
115	&_sys_ukn, /* 0x1F */
116
117	&_fat_user_open, /* 0x20 */
118	&_fat_user_read, /* 0x21 */
119	&_fat_user_write, /* 0x22 */
120	&_fat_user_lseek, /* 0x23 */
121	&_fat_fstat, /* 0x24 */
122	&_fat_close, /* 0x25 */
123	&_sys_ukn, /* 0x26 */
124	&_sys_ukn, /* 0x27 */
125	&_sys_ukn, /* 0x28 */
126	&_sys_ukn, /* 0x29 */
127	&_sys_ukn, /* 0x2A */
128	&_sys_ukn, /* 0x2B */
129	&_sys_ukn, /* 0x2C */
130	&_sys_ukn, /* 0x2D */
131	&_sys_ukn, /* 0x2E */
132	&_sys_ukn, /* 0x2F */
133
134	&_sys_nic_alloc, /* 0x30 */
135	&_sys_nic_alloc, /* 0x31 */
136	&_sys_nic_start, /* 0x32 */
137	&_sys_nic_start, /* 0x33 */
138	&_sys_nic_move, /* 0x34 */
139	&_sys_nic_move, /* 0x35 */
140	&_sys_nic_stop, /* 0x36 */
141	&_sys_nic_stop, /* 0x37 */
142	&_sys_ukn, /* 0x38 */
143	&_sys_ukn, /* 0x39 */
144	&_sys_ukn, /* 0x3A */
145	&_sys_ukn, /* 0x3B */
146	&_sys_ukn, /* 0x3C */
147	&_sys_ukn, /* 0x3D */
148	&_sys_ukn, /* 0x3E */
149	&_sys_ukn, /* 0x3F */
150	};
151
152	//////////////////////////////////////////////////////////////////////////////
153	// TTY related syscall handlers
154	//////////////////////////////////////////////////////////////////////////////
155
156	////////////////////
157	int _sys_tty_alloc()
158	{
159	// get a new TTY terminal index
160	unsigned int channel = _atomic_increment( &_tty_channel_allocator );
161	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
162	unsigned int vspace = _get_context_slot( CTX_VSID_ID );
163
164	if ( channel >= NB_TTY_CHANNELS )
165	{
166	_printf("\n[GIET_ERROR] in _sys_tty_alloc() : not enough TTY channels\n");
167	return -1;
168	}
169	else
170	{
171	_printf("\n[GIET WARNING] TTY channel %d allocated "
172	" to thread %d in vspace %d\n", channel, thread, vspace );
173	_set_context_slot( CTX_TTY_ID, channel );
174	return 0;
175	}
176	}
177
178	/////////////////////////////////////////////////
179	int _sys_tty_write( const char* buffer,
180	unsigned int length, // number of characters
181	unsigned int channel) // channel index
182	{
183	unsigned int nwritten;
184
185	// compute and check tty channel
186	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
187	if( channel >= NB_TTY_CHANNELS ) return -1;
188
189	// write string to TTY channel
190	for (nwritten = 0; nwritten < length; nwritten++)
191	{
192	// check tty's status
193	if ( _tty_get_register( channel, TTY_STATUS ) & 0x2 ) break;
194
195	// write one byte
196	if (buffer[nwritten] == '\n')
197	{
198	_tty_set_register( channel, TTY_WRITE, (unsigned int)'\r' );
199	}
200	_tty_set_register( channel, TTY_WRITE, (unsigned int)buffer[nwritten] );
201	}
202
203	return nwritten;
204	}
205
206	////////////////////////////////////////////////
207	int _sys_tty_read( char* buffer,
208	unsigned int length, // unused
209	unsigned int channel) // channel index
210	{
211	// compute and check tty channel
212	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
213	if( channel >= NB_TTY_CHANNELS ) return -1;
214
215	// read one character from TTY channel
216	if (_tty_rx_full[channel] == 0)
217	{
218	return 0;
219	}
220	else
221	{
222	*buffer = _tty_rx_buf[channel];
223	_tty_rx_full[channel] = 0;
224	return 1;
225	}
226	}
227
228	///////////////////////////////////////////
229	int _sys_tty_get_lock( unsigned int channel,
230	unsigned int * save_sr_ptr )
231	{
232	// compute and check tty channel
233	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
234	if( channel >= NB_TTY_CHANNELS ) return -1;
235
236	_it_disable( save_sr_ptr );
237	_get_lock( &_tty_lock[channel] );
238	return 0;
239	}
240
241	///////////////////////////////////////////////
242	int _sys_tty_release_lock( unsigned int channel,
243	unsigned int * save_sr_ptr )
244	{
245	// compute and check tty channel
246	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
247	if( channel >= NB_TTY_CHANNELS ) return -1;
248
249	_release_lock( &_tty_lock[channel] );
250	_it_restore( save_sr_ptr );
251	return 0;
252	}
253
254	//////////////////////////////////////////////////////////////////////////////
255	// TIM related syscall handlers
256	//////////////////////////////////////////////////////////////////////////////
257
258	////////////////////
259	int _sys_tim_alloc()
260	{
261	// get a new timer index
262	unsigned int channel = _atomic_increment(&_tim_channel_allocator);
263	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
264	unsigned int vspace = _get_context_slot( CTX_VSID_ID );
265
266	if ( channel >= NB_TIM_CHANNELS )
267	{
268	_printf("\n[GIET_ERROR] in _sys_tim_alloc() : not enough TIM channels\n");
269	return -1;
270	}
271	else
272	{
273	_printf("\n[GIET WARNING] TIM channel %d allocated "
274	" to thread %d in vspace %d\n", channel, thread, vspace );
275	_set_context_slot( CTX_TIM_ID, channel );
276	return 0;
277	}
278	}
279
280	/////////////////////////////////////////
281	int _sys_tim_start( unsigned int period )
282	{
283	// get timer index
284	unsigned int channel = _get_context_slot( CTX_TIM_ID );
285	if ( channel >= NB_TIM_CHANNELS )
286	{
287	_printf("\n[GIET_ERROR] in _sys_tim_start() : not enough TIM channels\n");
288	return -1;
289	}
290
291	// start timer
292	_timer_start( channel, period );
293
294	return 0;
295	}
296
297	///////////////////
298	int _sys_tim_stop()
299	{
300	// get timer index
301	unsigned int channel = _get_context_slot( CTX_TIM_ID );
302	if ( channel >= NB_TIM_CHANNELS )
303	{
304	_printf("\n[GIET_ERROR] in _sys_tim_stop() : illegal timer index\n");
305	return -1;
306	}
307
308	// stop timer
309	_timer_stop( channel );
310
311	return 0;
312	}
313
314	//////////////////////////////////////////////////////////////////////////////
315	// NIC related syscall handlers
316	//////////////////////////////////////////////////////////////////////////////
317
318	///////////////////////////////////////////
319	int _sys_nic_alloc( unsigned int is_rx )
320	{
321	unsigned int nic_channel;
322	unsigned int cma_channel;
323
324	// get a NIC_RX or NIC_TX channel index
325	if ( is_rx ) nic_channel = _atomic_increment(&_nic_rx_channel_allocator);
326	else nic_channel = _atomic_increment(&_nic_tx_channel_allocator);
327
328	if ( (nic_channel >= NB_NIC_CHANNELS) )
329	{
330	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough NIC channels\n");
331	return -1;
332	}
333
334	// get a CMA channel index
335	cma_channel = _atomic_increment(&_cma_channel_allocator);
336
337	if ( cma_channel >= NB_CMA_CHANNELS )
338	{
339	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough CMA channels\n");
340	return -1;
341	}
342
343	// register nic_index and cma_index in task context
344	if ( is_rx )
345	{
346	_set_context_slot( CTX_NIC_RX_ID, nic_channel );
347	_set_context_slot( CTX_CMA_RX_ID, cma_channel );
348	}
349	else
350	{
351	_set_context_slot( CTX_NIC_TX_ID, nic_channel );
352	_set_context_slot( CTX_CMA_TX_ID, cma_channel );
353	}
354
355	#if GIET_DEBUG_NIC
356	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
357	unsigned int vspace = _get_context_slot( CTX_VSID_ID );
358	_printf("\n[GIET DEBUG_NIC] NIC channel %d and CMA channel %d"
359	" allocated to task %d in vspace %d\n",
360	nic_channel, cma_channel, thread, vspace );
361	#endif
362
363	return 0;
364	}
365
366	////////////////////////////////////////
367	int _sys_nic_start( unsigned int is_rx,
368	unsigned int mac4,
369	unsigned int mac2 )
370	{
371	unsigned int nic_channel;
372	unsigned int cma_channel;
373
374	// get NIC channel index and CMA channel index
375	if ( is_rx )
376	{
377	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
378	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
379	}
380	else
381	{
382	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
383	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
384	}
385
386	if ( nic_channel >= NB_NIC_CHANNELS )
387	{
388	_printf("\n[GIET_ERROR] in _sys_nic_start(): NIC channel not allocated\n");
389	return -1;
390	}
391	if ( cma_channel >= NB_CMA_CHANNELS )
392	{
393	_printf("\n[GIET_ERROR] in _sys_nic_start(): CMA channel not allocated\n");
394	return -1;
395	}
396
397	unsigned int nic_chbuf_lsb; // 32 LSB bits of the NIC chbuf physical address
398	unsigned int nic_chbuf_msb; // 16 MSB bits of the NIC chbuf physical address
399	unsigned int ker_chbuf_lsb; // 32 LSB bits of the kernel chbuf physical address
400	unsigned int ker_chbuf_msb; // 16 MSB bits of the kernel chbuf physical address
401
402	// get the NIC chbuf descriptor physical address
403	unsigned int offset;
404	if ( is_rx ) offset = 0x1000;
405	else offset = 0x1010;
406	nic_chbuf_lsb = SEG_NIC_BASE + (nic_channel * NIC_CHANNEL_SPAN) + offset;
407	nic_chbuf_msb = (X_IO << Y_WIDTH) + Y_IO;
408
409	// get the kernel chbuf descriptor physical address
410	unsigned int ker_chbuf_vaddr;
411	if ( is_rx ) ker_chbuf_vaddr = (unsigned int)( &_nic_rx_chbuf[nic_channel] );
412	else ker_chbuf_vaddr = (unsigned int)( &_nic_tx_chbuf[nic_channel] );
413
414	// compute the kernel chbuf descriptor physical address
415	unsigned int ppn;
416	unsigned int flags;
417	unsigned int ptab = _get_context_slot(CTX_PTAB_ID);
418	unsigned int ko = _v2p_translate( (page_table_t*)ptab,
419	ker_chbuf_vaddr,
420	&ppn,
421	&flags );
422	if ( ko )
423	{
424	_puts("\n[GIET ERROR] in _nic_cma_start_receive() : kernel buffer unmapped\n");
425	return -1;
426	}
427
428	ker_chbuf_lsb = (ppn << 12) \| (ker_chbuf_vaddr & 0x00000FFF);
429	ker_chbuf_msb = ppn >> 20;
430
431	// initializes CMA registers defining the source chbuf (NIc)
432	_cma_set_register( cma_channel, CHBUF_SRC_DESC , nic_chbuf_lsb );
433	_cma_set_register( cma_channel, CHBUF_DST_EXT , nic_chbuf_msb );
434	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, 2 );
435
436	// initializes CMA registers defining the destination chbuf (kernel)
437	_cma_set_register( cma_channel, CHBUF_DST_DESC , ker_chbuf_lsb );
438	_cma_set_register( cma_channel, CHBUF_DST_EXT , ker_chbuf_msb );
439	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, GIET_NIC_CHBUF_NBUFS );
440
441	// start CMA transfer
442	_cma_set_register( cma_channel, CHBUF_BUF_SIZE , 4096 );
443	_cma_set_register( cma_channel, CHBUF_PERIOD , 300 );
444	_cma_set_register( cma_channel, CHBUF_RUN , 1 );
445
446	// activates NIC channel
447	_nic_channel_start( nic_channel, is_rx, mac4, mac2 );
448	return 0;
449	}
450
451	//////////////////////////////////////
452	int _sys_nic_move( unsigned int is_rx,
453	void* buffer )
454	{
455	unsigned long long user_paddr; // user buffer physical address
456	unsigned long long kernel_paddr; // kernel buffer physical address
457
458	// Compute user buffer physical address and check access rights
459	unsigned int ppn;
460	unsigned int flags;
461	unsigned int vaddr = (unsigned int)buffer;
462	unsigned int user_ptab = _get_context_slot( CTX_PTAB_ID );
463	unsigned int ko = _v2p_translate( (page_table_t*)user_ptab,
464	vaddr,
465	&ppn,
466	&flags );
467	if ( ko )
468	{
469	_printf("\n[GIET ERROR] in _sys_nic_tx_move() : user buffer unmapped\n");
470	return -1;
471	}
472	if ( (flags & PTE_U) == 0 )
473	{
474	_printf("\n[GIET ERROR] in _sys_nic_tx_move() : illegal buffer address\n");
475	return -1;
476	}
477	user_paddr = ((unsigned long long)ppn << 12) \| (vaddr & 0x00000FFF);
478
479	// get NIC channel index, to get pointer on NIC_TX chbuf pointer
480	unsigned int channel;
481	if ( is_rx ) channel = _get_context_slot( CTX_NIC_RX_ID );
482	else channel = _get_context_slot( CTX_NIC_TX_ID );
483
484	if ( channel >= NB_NIC_CHANNELS )
485	{
486	_printf("\n[GIET_ERROR] in _sys_nic_move() : illegal NIC channel index\n");
487	return -1;
488	}
489
490	nic_chbuf_t* chbuf;
491	if ( is_rx ) chbuf = &_nic_rx_chbuf[channel];
492	else chbuf = &_nic_tx_chbuf[channel];
493
494	// polling on the chbuf status
495	volatile unsigned long long desc;
496	unsigned int full;
497	unsigned int ok = 0;
498	unsigned int index = chbuf->index;
499	unsigned int timeout = GIET_NIC_CHBUF_TIMEOUT;
500	while( ok == 0 )
501	{
502	desc = chbuf->buffer[index];
503	full = desc >> 63;
504	if ( (is_rx && full) \|\| ((is_rx == 0) && (full == 0)) ) // success
505	{
506	ok = 1;
507	}
508	else // retry
509	{
510	timeout--;
511	}
512	if ( timeout == 0 )
513	{
514	_printf("\n[GIET_ERROR] in _sys_ni_move() : timeout\n");
515	return -1;
516	}
517	}
518	kernel_paddr = desc & 0x0000FFFFFFFFFFFFULL;
519
520	// move one container using, a physical_memcpy
521	if ( is_rx ) _physical_memcpy( user_paddr,
522	kernel_paddr,
523	GIET_NIC_CHBUF_SIZE );
524
525	else _physical_memcpy( kernel_paddr,
526	user_paddr,
527	GIET_NIC_CHBUF_SIZE );
528
529	// update chbuf status and index
530	if ( is_rx ) chbuf->buffer[index] = desc & 0x0000FFFFFFFFFFFFULL;
531	else chbuf->buffer[index] = desc \| 0x8000000000000000ULL;
532	if ( index == (GIET_NIC_CHBUF_NBUFS - 1) ) chbuf->index = 0;
533	else chbuf->index = index + 1;
534
535	return 0;
536	} // end _sys_nic_move()
537
538	////////////////////////////////////////
539	int _sys_nic_stop( unsigned int is_rx )
540	{
541	unsigned int nic_channel;
542	unsigned int cma_channel;
543
544	// get NIC channel index and CMA channel index
545	if ( is_rx )
546	{
547	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
548	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
549	}
550	else
551	{
552	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
553	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
554	}
555
556	if ( nic_channel >= NB_NIC_CHANNELS )
557	{
558	_printf("\n[GIET_ERROR] in _sys_nic_start(): NIC channel not allocated\n");
559	return -1;
560	}
561	if ( cma_channel >= NB_CMA_CHANNELS )
562	{
563	_printf("\n[GIET_ERROR] in _sys_nic_start(): CMA channel not allocated\n");
564	return -1;
565	}
566
567	// desactivates the NIC channel
568	_nic_channel_stop( nic_channel, is_rx );
569
570	// desactivates the CMA channel
571	_cma_channel_stop( cma_channel );
572
573	return 0;
574	}
575
576	/////////////////////////////////////////////////////////////////////////////////////////
577	// FBF related syscall handlers
578	/////////////////////////////////////////////////////////////////////////////////////////
579
580	// Array of fbf_chbuf descriptors, indexed by the CMA channel index.
581	__attribute__((section (".unckdata")))
582	volatile fbf_chbuf_t _fbf_chbuf[NB_CMA_CHANNELS] __attribute__((aligned(32)));
583
584	// Physical addresses of these fbf_chbuf descriptors (required for L2 cache sync)
585	__attribute__((section (".unckdata")))
586	unsigned long long _fbf_chbuf_paddr[NB_CMA_CHANNELS];
587
588	/////////////////////////////////////////////
589	int _sys_fbf_sync_write( unsigned int offset,
590	void* buffer,
591	unsigned int length )
592	{
593	char* fbf_address = (char *)SEG_FBF_BASE + offset;
594	memcpy( fbf_address, buffer, length);
595
596	return 0;
597	}
598
599	/////////////////////////////////////////////
600	int _sys_fbf_sync_read( unsigned int offset,
601	void* buffer,
602	unsigned int length )
603	{
604	char* fbf_address = (char *)SEG_FBF_BASE + offset;
605	memcpy( buffer, fbf_address, length);
606
607	return 0;
608	}
609
610	////////////////////////
611	int _sys_fbf_cma_alloc()
612	{
613	// get a new CMA channel index
614	unsigned int channel = _atomic_increment( &_cma_channel_allocator );
615	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
616	unsigned int vspace = _get_context_slot( CTX_VSID_ID );
617
618	if ( channel >= NB_CMA_CHANNELS )
619	{
620	_printf("\n[GIET ERROR] in _sys_fbf_cma_alloc() : not enough CMA channels\n");
621	return -1;
622	}
623	else
624	{
625	_printf("\n[GIET WARNING] FBF_CMA channel %d allocated "
626	" to thread %d in vspace %d\n", channel, thread, vspace );
627	_set_context_slot( CTX_CMA_FB_ID, channel );
628	return 0;
629	}
630	} // end sys_fbf_cma_alloc()
631
632	////////////////////////////////////////////
633	int _sys_fbf_cma_start( void* vbase0,
634	void* vbase1,
635	unsigned int length )
636	{
637	#if NB_CMA_CHANNELS > 0
638
639	unsigned int ptab; // page table virtual address
640	unsigned int ko; // unsuccessfull V2P translation
641	unsigned int vaddr; // virtual address
642	unsigned int flags; // protection flags
643	unsigned int ppn; // physical page number
644	unsigned long long chbuf_paddr; // physical address of source chbuf descriptor
645
646	// get channel index
647	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
648
649	if ( channel >= NB_CMA_CHANNELS )
650	{
651	_printf("\n[GIET ERROR] in _fbf_cma_start() : CMA channel index too large\n");
652	return -1;
653	}
654
655	#if GIET_DEBUG_FBF_CMA
656	_printf("\n[FBF_CMA DEBUG] enters _sys_fbf_cma_start()\n"
657	" - channel = %d\n"
658	" - buf0 vbase = %x\n"
659	" - buf1 vbase = %x\n"
660	" - buffer size = %x\n",
661	channel,
662	(unsigned int)vbase0,
663	(unsigned int)vbase1,
664	length );
665	#endif
666
667	// checking user buffers virtual addresses and length alignment
668	if ( ((unsigned int)vbase0 & 0x3) \|\| ((unsigned int)vbase1 & 0x3) \|\| (length & 0x3) )
669	{
670	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer not word aligned\n");
671	return -1;
672	}
673
674	// get page table virtual address
675	ptab = _get_context_slot(CTX_PTAB_ID);
676
677	// compute frame buffer physical address and initialize _fbf_chbuf[channel]
678	vaddr = ((unsigned int)SEG_FBF_BASE);
679	ko = _v2p_translate( (page_table_t*) ptab,
680	(vaddr >> 12),
681	&ppn,
682	&flags );
683	if (ko)
684	{
685	_printf("\n[GIET ERROR] in _fb_cma_start() : frame buffer unmapped\n");
686	return -1;
687	}
688
689	_fbf_chbuf[channel].fbf = ((paddr_t)ppn << 12) \| (vaddr & 0x00000FFF);
690
691	// Compute user buffer 0 physical addresses and intialize _fbf_chbuf[channel]
692	vaddr = (unsigned int)vbase0;
693	ko = _v2p_translate( (page_table_t*) ptab,
694	(vaddr >> 12),
695	&ppn,
696	&flags );
697	if (ko)
698	{
699	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer 0 unmapped\n");
700	return -1;
701	}
702	if ((flags & PTE_U) == 0)
703	{
704	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer 0 not in user space\n");
705	return -1;
706	}
707
708	_fbf_chbuf[channel].buf0 = ((paddr_t)ppn << 12) \| (vaddr & 0x00000FFF);
709
710	// Compute user buffer 1 physical addresses and intialize _fbf_chbuf[channel]
711	vaddr = (unsigned int)vbase1;
712	ko = _v2p_translate( (page_table_t*) ptab,
713	(vaddr >> 12),
714	&ppn,
715	&flags );
716	if (ko)
717	{
718	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer 1 unmapped\n");
719	return -1;
720	}
721	if ((flags & PTE_U) == 0)
722	{
723	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer 1 not in user space\n");
724	return -1;
725	}
726
727	_fbf_chbuf[channel].buf1 = ((paddr_t)ppn << 12) \| (vaddr & 0x00000FFF);
728
729	// initializes buffer length
730	_fbf_chbuf[channel].length = length;
731
732	// Compute and register physical adress of the chbuf descriptor
733	vaddr = (unsigned int)(&_fbf_chbuf[channel]);
734	ko = _v2p_translate( (page_table_t*) ptab,
735	(vaddr >> 12),
736	&ppn,
737	&flags );
738	if (ko)
739	{
740	_printf("\n[GIET ERROR] in _fbf_cma_start() : chbuf descriptor unmapped\n");
741	return -1;
742	}
743
744	chbuf_paddr = (((paddr_t)ppn) << 12) \| (vaddr & 0x00000FFF);
745
746	_fbf_chbuf_paddr[channel] = chbuf_paddr;
747
748
749	if ( USE_IOB )
750	{
751	// SYNC request for channel descriptor
752	_mmc_sync( chbuf_paddr, 32 );
753	}
754
755	#if GIET_DEBUG_FBF_CMA
756	_printf(" - fbf pbase = %l\n"
757	" - buf0 pbase = %l\n"
758	" - buf1 pbase = %l\n"
759	" - chbuf pbase = %l\n",
760	_fbf_chbuf[channel].fbf,
761	_fbf_chbuf[channel].buf0,
762	_fbf_chbuf[channel].buf1,
763	chbuf_paddr );
764	#endif
765
766	// call CMA driver to start transfer
767	_cma_channel_start( channel,
768	chbuf_paddr,
769	2,
770	chbuf_paddr + 16,
771	1,
772	length );
773	return 0;
774
775	#else
776
777	_printf("\n[GIET ERROR] in _sys_fbf_cma_start() : NB_CMA_CHANNELS = 0\n");
778	return -1;
779
780	#endif
781	} // end _sys_fbf_cma_start()
782
783	/////////////////////////////////////////////////////
784	int _sys_fbf_cma_display( unsigned int buffer_index )
785	{
786	#if NB_CMA_CHANNELS > 0
787
788	volatile paddr_t buf_paddr;
789	unsigned int full = 1;
790
791	// get channel index
792	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
793
794	if ( channel >= NB_CMA_CHANNELS )
795	{
796	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : CMA channel index too large\n");
797	return -1;
798	}
799
800	#if GIET_DEBUG_FBF_CMA
801	_printf("\n[FBF_CMA DEBUG] enters _sys_fb_cma_display()\n"
802	" - channel = %d\n"
803	" - buffer = %d\n",
804	channel, buffer_index );
805	#endif
806
807	// waiting user buffer empty
808	while ( full )
809	{
810	if ( USE_IOB )
811	{
812	// INVAL L1 cache for the chbuf descriptor,
813	_dcache_buf_invalidate( (unsigned int)&_fbf_chbuf[channel], 32 );
814
815	// INVAL L2 cache for the chbuf descriptor,
816	_mmc_inval( _fbf_chbuf_paddr[channel], 32 );
817	}
818
819	// read user buffer descriptor
820	if ( buffer_index == 0 ) buf_paddr = _fbf_chbuf[channel].buf0;
821	else buf_paddr = _fbf_chbuf[channel].buf1;
822
823	full = ( (unsigned int)(buf_paddr>>63) );
824	}
825
826	if ( USE_IOB )
827	{
828	// SYNC request for the user buffer, because
829	// it will be read from XRAM by the CMA component
830	_mmc_sync( buf_paddr, _fbf_chbuf[channel].length );
831	}
832
833	// set user buffer status
834	if ( buffer_index == 0 ) _fbf_chbuf[channel].buf0 = buf_paddr \| 0x8000000000000000ULL;
835	else _fbf_chbuf[channel].buf1 = buf_paddr \| 0x8000000000000000ULL;
836
837	// reset fbf buffer status
838	_fbf_chbuf[channel].fbf = _fbf_chbuf[channel].fbf & 0x7FFFFFFFFFFFFFFFULL;
839
840	if ( USE_IOB )
841	{
842	// SYNC request for the channel descriptor, because
843	// it will be read from XRAM by the CMA component
844	_mmc_sync( _fbf_chbuf_paddr[channel], 32 );
845	}
846
847	#if GIET_DEBUG_FBF_CMA
848	_printf(" - fbf pbase = %l\n"
849	" - buf0 pbase = %l\n"
850	" - buf1 pbase = %l\n",
851	_fbf_chbuf[channel].fbf,
852	_fbf_chbuf[channel].buf0,
853	_fbf_chbuf[channel].buf1 );
854	#endif
855
856
857	return 0;
858
859	#else
860
861	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : no CMA channel allocated\n");
862	return -1;
863
864	#endif
865	} // end _sys_fbf_cma_display()
866
867	///////////////////////
868	int _sys_fbf_cma_stop()
869	{
870	#if NB_CMA_CHANNELS > 0
871
872	// get channel index
873	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
874
875	if ( channel >= NB_CMA_CHANNELS )
876	{
877	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : CMA channel index too large\n");
878	return -1;
879	}
880
881	// Desactivate CMA channel
882	_cma_channel_stop( channel );
883
884	return 0;
885
886	#else
887
888	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : no CMA channel allocated\n");
889	return -1;
890
891	#endif
892	} // end _sys_fbf_cma_stop()
893
894
895	//////////////////////////////////////////////////////////////////////////////
896	// Miscelaneous syscall handlers
897	//////////////////////////////////////////////////////////////////////////////
898
899	///////////////
900	int _sys_ukn()
901	{
902	_printf("\n[GIET ERROR] Undefined System Call / EPC = %x\n", _get_epc() );
903	return -1;
904	}
905
906	////////////////////////////////////
907	int _sys_proc_xyp( unsigned int* x,
908	unsigned int* y,
909	unsigned int* p )
910	{
911	unsigned int gpid = _get_procid(); // global processor index from CPO register
912
913	*x = (gpid >> (Y_WIDTH + P_WIDTH)) & ((1<<X_WIDTH)-1);
914	*y = (gpid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
915	*p = gpid & ((1<<P_WIDTH)-1);
916
917	return 0;
918	}
919
920	//////////////////////////////////
921	int _sys_task_exit( char* string )
922	{
923	unsigned int date = _get_proctime();
924
925	unsigned int gpid = _get_procid();
926	unsigned int cluster_xy = gpid >> P_WIDTH;
927	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
928	unsigned int x = cluster_xy >> Y_WIDTH;
929	unsigned int lpid = gpid & ((1<<P_WIDTH)-1);
930
931	unsigned int task_id = _get_context_slot(CTX_LTID_ID);
932
933	// print exit message
934	_printf("\n[GIET] Exit task %d on processor[%d,%d,%d] at cycle %d"
935	"\n Cause : %s\n\n",
936	task_id, x, y, lpid, date, string );
937
938	// goes to sleeping state
939	_set_context_slot(CTX_RUN_ID, 0);
940
941	// deschedule
942	_context_switch();
943
944	return 0;
945	}
946
947	//////////////////////
948	int _context_switch()
949	{
950	unsigned int save_sr;
951
952	_it_disable( &save_sr );
953	_ctx_switch();
954	_it_restore( &save_sr );
955
956	return 0;
957	}
958
959	////////////////////////
960	int _sys_local_task_id()
961	{
962	return _get_context_slot(CTX_LTID_ID);
963	}
964
965	/////////////////////////
966	int _sys_global_task_id()
967	{
968	return _get_context_slot(CTX_GTID_ID);
969	}
970
971	////////////////////
972	int _sys_thread_id()
973	{
974	return _get_context_slot(CTX_TRDID_ID);
975	}
976
977	//////////////////////////////////////
978	int _sys_procs_number( unsigned int x,
979	unsigned int y,
980	unsigned int* number )
981	{
982	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
983	mapping_cluster_t * cluster = _get_cluster_base(header);
984
985	if ( (x < X_SIZE) && (y < Y_SIZE) )
986	{
987	number = cluster[(xY_SIZE)+y].procs;
988	return 0;
989	}
990	else
991	{
992	_printf("\n[GIET ERROR] in _sys_procs_number() : illegal (x,y) coordinates\n" );
993	return -1;
994	}
995	}
996
997	///////////////////////////////////////////////////////
998	int _sys_vobj_get_vbase( char* vspace_name,
999	char* vobj_name,
1000	unsigned int* vbase )
1001	{
1002	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1003	mapping_vspace_t * vspace = _get_vspace_base(header);
1004	mapping_vobj_t * vobj = _get_vobj_base(header);
1005
1006	unsigned int vspace_id;
1007	unsigned int vobj_id;
1008
1009	// scan vspaces
1010	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1011	{
1012	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
1013	{
1014	// scan vobjs
1015	for (vobj_id = vspace[vspace_id].vobj_offset;
1016	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1017	vobj_id++)
1018	{
1019	if (_strncmp(vobj[vobj_id].name, vobj_name, 31) == 0)
1020	{
1021	*vbase = vobj[vobj_id].vbase;
1022	return 0;
1023	}
1024	}
1025	}
1026	}
1027	return -1; // not found
1028	}
1029
1030	/////////////////////////////////////////////////////////
1031	int _sys_vobj_get_length( char* vspace_name,
1032	char* vobj_name,
1033	unsigned int* length )
1034	{
1035	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1036	mapping_vspace_t * vspace = _get_vspace_base(header);
1037	mapping_vobj_t * vobj = _get_vobj_base(header);
1038
1039	unsigned int vspace_id;
1040	unsigned int vobj_id;
1041
1042	// scan vspaces
1043	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1044	{
1045	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
1046	{
1047	// scan vobjs
1048	for (vobj_id = vspace[vspace_id].vobj_offset;
1049	vobj_id < (vspace[vspace_id].vobj_offset + vspace[vspace_id].vobjs);
1050	vobj_id++)
1051	{
1052	if (_strncmp(vobj[vobj_id].name, vobj_name, 31) == 0)
1053	{
1054	*length = vobj[vobj_id].length;
1055	return 0;
1056	}
1057	}
1058	}
1059	}
1060	return -1; // not found
1061	}
1062
1063	////////////////////////////////////////
1064	int _sys_xy_from_ptr( void* ptr,
1065	unsigned int* x,
1066	unsigned int* y )
1067	{
1068	unsigned int ret;
1069	unsigned int ppn;
1070	unsigned int flags;
1071	unsigned int vpn = (((unsigned int)ptr)>>12);
1072
1073	// get the page table pointer
1074	page_table_t* pt = (page_table_t*)_get_context_slot( CTX_PTAB_ID );
1075
1076	// compute the physical address
1077	if ( (ret = _v2p_translate( pt, vpn, &ppn, &flags )) ) return -1;
1078
1079	*x = (ppn>>24) & 0xF;
1080	*y = (ppn>>20) & 0xF;
1081	return 0;
1082	}
1083
1084	/////////////////////////////////////////
1085	int _sys_heap_info( unsigned int* vaddr,
1086	unsigned int* length,
1087	unsigned int x,
1088	unsigned int y )
1089	{
1090	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1091	mapping_task_t * tasks = _get_task_base(header);
1092	mapping_vobj_t * vobjs = _get_vobj_base(header);
1093	mapping_vspace_t * vspaces = _get_vspace_base(header);
1094
1095	unsigned int task_id;
1096	unsigned int vspace_id;
1097	unsigned int vobj_id = 0xFFFFFFFF;
1098
1099	// searching the heap vobj_id
1100	if ( (x < X_SIZE) && (y < Y_SIZE) ) // searching a task in cluster(x,y)
1101	{
1102	// get vspace global index
1103	vspace_id = _get_context_slot(CTX_VSID_ID);
1104
1105	// scan all tasks in vspace
1106	unsigned int min = vspaces[vspace_id].task_offset ;
1107	unsigned int max = min + vspaces[vspace_id].tasks ;
1108	for ( task_id = min ; task_id < max ; task_id++ )
1109	{
1110	if ( tasks[task_id].clusterid == (x * Y_SIZE + y) )
1111	{
1112	vobj_id = tasks[task_id].heap_vobj_id;
1113	if ( vobj_id != 0xFFFFFFFF ) break;
1114	}
1115	}
1116	}
1117	else // searching in the calling task
1118	{
1119	task_id = _get_context_slot(CTX_GTID_ID);
1120	vobj_id = tasks[task_id].heap_vobj_id;
1121	}
1122
1123	// analysing the vobj_id
1124	if ( vobj_id != 0xFFFFFFFF )
1125	{
1126	*vaddr = vobjs[vobj_id].vbase;
1127	*length = vobjs[vobj_id].length;
1128	return 0;
1129	}
1130	else
1131	{
1132	*vaddr = 0;
1133	*length = 0;
1134	return -1;
1135	}
1136	} // end _sys_heap_info()
1137
1138
1139	// Local Variables:
1140	// tab-width: 4
1141	// c-basic-offset: 4
1142	// c-file-offsets:((innamespace . 0)(inline-open . 0))
1143	// indent-tabs-mode: nil
1144	// End:
1145	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
1146

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