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source: soft/giet_vm/giet_kernel/sys_handler.c @ 520

Last change on this file since 520 was 519, checked in by alain, 10 years ago
Introducing support for hardware coprocessors using the vci_mwmr_dma components.
Property svn:executable set to ``*
File size: 59.1 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 <mwr_driver.h>
15	#include <cma_driver.h>
16	#include <ctx_handler.h>
17	#include <fat32.h>
18	#include <utils.h>
19	#include <kernel_malloc.h>
20	#include <tty0.h>
21	#include <vmem.h>
22	#include <hard_config.h>
23	#include <giet_config.h>
24	#include <mapping_info.h>
25	#include <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	////////////////////////////////////////////////////////////////////////////
65	// Coprocessors loks and synchronisation variables
66	////////////////////////////////////////////////////////////////////////////
67
68	__attribute__((section(".kdata")))
69	simple_lock_t _coproc_lock[X_SIZE*Y_SIZE];
70
71	__attribute__((section(".kdata")))
72	unsigned int _coproc_done[X_SIZE*Y_SIZE];
73
74	////////////////////////////////////////////////////////////////////////////
75	// Channel allocators for peripherals
76	// (TTY[0] is reserved for kernel)
77	////////////////////////////////////////////////////////////////////////////
78
79	__attribute__((section(".kdata")))
80	unsigned int _tty_channel_allocator = 1;
81
82	__attribute__((section(".kdata")))
83	unsigned int _tim_channel_allocator = 0;
84
85	__attribute__((section(".kdata")))
86	unsigned int _cma_channel_allocator = 0;
87
88	__attribute__((section(".kdata")))
89	unsigned int _nic_rx_channel_allocator = 0;
90
91	__attribute__((section(".kdata")))
92	unsigned int _nic_tx_channel_allocator = 0;
93
94	////////////////////////////////////////////////////////////////////////////
95	// These global variables are allocated in tty0.c and tty_driver.c files.
96	////////////////////////////////////////////////////////////////////////////
97
98	extern sqt_lock_t _tty0_sqt_lock;
99
100	extern unsigned int _tty_rx_full[NB_TTY_CHANNELS];
101
102	extern unsigned int _tty_rx_buf[NB_TTY_CHANNELS];
103
104	////////////////////////////////////////////////////////////////////////////
105	// NIC_RX and NIC_TX chbuf arrays
106	////////////////////////////////////////////////////////////////////////////
107
108	__attribute__((section(".kdata")))
109	nic_chbuf_t _nic_rx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(64)));
110
111	__attribute__((section(".kdata")))
112	nic_chbuf_t _nic_tx_chbuf[NB_NIC_CHANNELS] __attribute__((aligned(64)));
113
114	////////////////////////////////////////////////////////////////////////////
115	// FBF related chbuf descriptors array, indexed by the CMA channel index.
116	// Physical addresses of these chbuf descriptors required for L2 cache sync.
117	////////////////////////////////////////////////////////////////////////////
118
119	__attribute__((section(".kdata")))
120	fbf_chbuf_t _fbf_chbuf[NB_CMA_CHANNELS] __attribute__((aligned(64)));
121
122	__attribute__((section(".kdata")))
123	unsigned long long _fbf_chbuf_paddr[NB_CMA_CHANNELS];
124
125	////////////////////////////////////////////////////////////////////////////
126	// Initialize the syscall vector with syscall handlers
127	// Note: This array must be synchronised with the define in file stdio.h
128	////////////////////////////////////////////////////////////////////////////
129
130	__attribute__((section(".kdata")))
131	const void * _syscall_vector[64] =
132	{
133	&_sys_proc_xyp, /* 0x00 */
134	&_get_proctime, /* 0x01 */
135	&_sys_tty_write, /* 0x02 */
136	&_sys_tty_read, /* 0x03 */
137	&_sys_tty_alloc, /* 0x04 */
138	&_sys_tty_get_lock, /* 0x05 */
139	&_sys_tty_release_lock, /* 0x06 */
140	&_sys_heap_info, /* 0x07 */
141	&_sys_local_task_id, /* 0x08 */
142	&_sys_global_task_id, /* 0x09 */
143	&_sys_fbf_cma_alloc, /* 0x0A */
144	&_sys_fbf_cma_start, /* 0x0B */
145	&_sys_fbf_cma_display, /* 0x0C */
146	&_sys_fbf_cma_stop, /* 0x0D */
147	&_sys_task_exit, /* 0x0E */
148	&_sys_procs_number, /* 0x0F */
149
150	&_sys_fbf_sync_write, /* 0x10 */
151	&_sys_fbf_sync_read, /* 0x11 */
152	&_sys_thread_id, /* 0x12 */
153	&_sys_ukn, /* 0x13 */
154	&_sys_tim_alloc, /* 0x14 */
155	&_sys_tim_start, /* 0x15 */
156	&_sys_tim_stop, /* 0x16 */
157	&_sys_ukn, /* 0x17 */
158	&_sys_ukn, /* 0x18 */
159	&_context_switch, /* 0x19 */
160	&_sys_vseg_get_vbase, /* 0x1A */
161	&_sys_vseg_get_length, /* 0x1B */
162	&_sys_xy_from_ptr, /* 0x1C */
163	&_sys_ukn, /* 0x1D */
164	&_sys_ukn, /* 0x1E */
165	&_sys_ukn, /* 0x1F */
166
167	&_fat_user_open, /* 0x20 */
168	&_fat_user_read, /* 0x21 */
169	&_fat_user_write, /* 0x22 */
170	&_fat_user_lseek, /* 0x23 */
171	&_fat_fstat, /* 0x24 */
172	&_fat_close, /* 0x25 */
173	&_sys_ukn, /* 0x26 */
174	&_sys_ukn, /* 0x27 */
175	&_sys_ukn, /* 0x28 */
176	&_sys_ukn, /* 0x29 */
177	&_sys_ukn, /* 0x2A */
178	&_sys_ukn, /* 0x2B */
179	&_sys_ukn, /* 0x2C */
180	&_sys_ukn, /* 0x2D */
181	&_sys_ukn, /* 0x2E */
182	&_sys_ukn, /* 0x2F */
183
184	&_sys_nic_alloc, /* 0x30 */
185	&_sys_nic_start, /* 0x31 */
186	&_sys_nic_move, /* 0x32 */
187	&_sys_nic_stop, /* 0x33 */
188	&_sys_nic_stats, /* 0x34 */
189	&_sys_nic_clear, /* 0x35 */
190	&_sys_ukn, /* 0x36 */
191	&_sys_ukn, /* 0x37 */
192	&_sys_coproc_register_get, /* 0x38 */
193	&_sys_coproc_register_set, /* 0x39 */
194	&_sys_coproc_release, /* 0x3A */
195	&_sys_coproc_completed, /* 0x3B */
196	&_sys_coproc_alloc, /* 0x3C */
197	&_sys_coproc_channel_init, /* 0x3D */
198	&_sys_coproc_channel_start, /* 0x3E */
199	&_sys_coproc_channel_stop, /* 0x3F */
200	};
201
202
203	//////////////////////////////////////////////////////////////////////////////
204	// Coprocessors related syscall handlers
205	//////////////////////////////////////////////////////////////////////////////
206
207	///////////////////////////////////////////////////////
208	int _sys_coproc_register_set( unsigned int cluster_xy,
209	unsigned int reg_index,
210	unsigned int value )
211	{
212	// TODO checking coprocessor ownership...
213
214	_mwr_set_coproc_register( cluster_xy , reg_index , value );
215	return 0;
216	}
217
218	///////////////////////////////////////////////////////
219	int _sys_coproc_register_get( unsigned int cluster_xy,
220	unsigned int reg_index,
221	unsigned int* buffer )
222	{
223	// TODO checking coprocessor ownership...
224
225	*buffer = _mwr_get_coproc_register( cluster_xy , reg_index );
226	return 0;
227	}
228
229	//////////////////////////////////////////////////
230	int _sys_coproc_alloc( unsigned int coproc_type,
231	unsigned int* coproc_info,
232	unsigned int* cluster_xy )
233	{
234	// In this implementation, the allocation policy is constrained:
235	// the coprocessor must be in the same cluster as the calling task,
236	// and ther is at most one coprocessor per cluster
237
238	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
239	mapping_cluster_t * cluster = _get_cluster_base(header);
240	mapping_periph_t * periph = _get_periph_base(header);
241
242	// get cluster coordinates and cluster global index
243	unsigned int procid = _get_procid();
244	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
245	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
246	unsigned int cluster_id = x*Y_SIZE + y;
247
248	// search coprocessor in cluster
249	mapping_periph_t* found = NULL;
250	unsigned int min = cluster[cluster_id].periph_offset;
251	unsigned int max = min + cluster[cluster_id].periphs;
252	unsigned int periph_id;
253	for ( periph_id = min ; periph_id < max ; periph_id++ )
254	{
255	if ( (periph[periph_id].type == PERIPH_TYPE_MWR) &&
256	(periph[periph_id].subtype == coproc_type) )
257	{
258	found = &periph[periph_id];
259	break;
260	}
261	}
262
263	if ( found != NULL )
264	{
265	// get the lock (at most one coproc per cluster)
266	_simple_lock_acquire( &_coproc_lock[cluster_id] );
267
268	// returns coprocessor info
269	*coproc_info = (found->arg0 & 0xFF) \|
270	(found->arg1 & 0xFF)<<8 \|
271	(found->arg2 & 0xFF)<<16 \|
272	(found->arg3 & 0xFF)<<24 ;
273	*cluster_xy = (x<<Y_WIDTH) + y;
274
275	#if GIET_DEBUG_COPROC
276	_printf("\n[GIET DEBUG COPROC] _sys_coproc_alloc() in cluster[%d,%d]\n"
277	" coproc_info = %x / cluster_xy = %x\n",
278	x , y , coproc_info , cluster_xy );
279	#endif
280	return 0;
281	}
282	else
283	{
284	_printf("\n[GIET_ERROR] in _sys_coproc_alloc(): no coprocessor "
285	" with type %d available in cluster[%d,%d]\n",
286	coproc_type , x , y );
287	return -1;
288	}
289	} // end _sys_coproc_alloc()
290
291	//////////////////////////////////////////////////
292	int _sys_coproc_release( unsigned int cluster_xy )
293	{
294	// TODO checking coprocessor ownership...
295
296	// check cluster coordinates
297	unsigned int cx = cluster_xy >> Y_WIDTH;
298	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
299	unsigned int procid = _get_procid();
300	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
301	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
302	if ( (x != cx) \|\| (y != cy) )
303	{
304	_printf("\n[GIET_ERROR] in _sys_coproc_channel_init(): "
305	"wrong cluster coordinates\n");
306	return -1;
307	}
308
309	// compute coprocessor global index
310	unsigned int coproc_id = x * Y_SIZE + y;
311
312	// release coprocessor
313	_simple_lock_release( &_coproc_lock[coproc_id] );
314
315	#if GIET_DEBUG_COPROC
316	_printf("\n[GIET DEBUG COPROC] _sys_coproc_release() in cluster[%d,%d]\n",
317	x, y );
318	#endif
319
320	return 0;
321	} // end _sys_coproc_release()
322
323	/////////////////////////////////////////////////////////////////
324	int _sys_coproc_channel_init( unsigned int cluster_xy,
325	unsigned int channel,
326	giet_coproc_channel_t* desc )
327	{
328	// TODO checking coprocessor ownership...
329
330	// check cluster coordinates
331	unsigned int cx = cluster_xy >> Y_WIDTH;
332	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
333	unsigned int procid = _get_procid();
334	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
335	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
336	if ( (x != cx) \|\| (y != cy) )
337	{
338	_printf("\n[GIET_ERROR] in _sys_coproc_channel_init(): "
339	"wrong cluster coordinates\n");
340	return -1;
341	}
342
343	// check channel mode
344	unsigned mode = desc->channel_mode;
345	if ( (mode != MODE_MWMR) &&
346	(mode != MODE_DMA_IRQ) &&
347	(mode != MODE_DMA_NO_IRQ) )
348	{
349	_printf("\n[GIET_ERROR] in _sys_coproc_channel_init():"
350	" illegal mode\n");
351	return -1;
352	}
353
354	// get memory buffer size
355	unsigned int size = desc->buffer_size;
356
357	// these variables are used for the v2p translations
358	unsigned int ptab = _get_context_slot(CTX_PTAB_ID);
359	unsigned int ppn;
360	unsigned int flags;
361	unsigned long long buffer_paddr;
362	unsigned int buffer_lsb;
363	unsigned int buffer_msb;
364	unsigned long long mwmr_paddr;
365	unsigned int mwmr_lsb;
366	unsigned int mwmr_msb;
367	unsigned long long lock_paddr;
368	unsigned int lock_lsb;
369	unsigned int lock_msb;
370
371	// compute memory buffer physical address
372	_v2p_translate( (page_table_t*)ptab,
373	desc->buffer_vaddr>>12,
374	&ppn,
375	&flags );
376	buffer_paddr = (((unsigned long long)ppn) << 12) \|
377	(desc->buffer_vaddr & 0x00000FFF);
378	buffer_lsb = (unsigned int)buffer_paddr;
379	buffer_msb = (unsigned int)(buffer_paddr>>32);
380
381	// call MWMR_DMA driver
382	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_MODE, mode );
383	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_SIZE, size );
384	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_BUFFER_LSB, buffer_lsb );
385	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_BUFFER_MSB, buffer_msb );
386
387	// compute MWMR descriptor and lock physical addresses (if required)
388	if ( mode == MODE_MWMR )
389	{
390	_v2p_translate( (page_table_t*)ptab,
391	desc->mwmr_vaddr>>12,
392	&ppn,
393	&flags );
394	mwmr_paddr = (((unsigned long long)ppn) << 12) \|
395	(desc->mwmr_vaddr & 0x00000FFF);
396	mwmr_lsb = (unsigned int)mwmr_paddr;
397	mwmr_msb = (unsigned int)(mwmr_paddr>>32);
398
399	_v2p_translate( (page_table_t*)ptab,
400	desc->lock_vaddr>>12,
401	&ppn,
402	&flags );
403	lock_paddr = (((unsigned long long)ppn) << 12) \|
404	(desc->lock_vaddr & 0x00000FFF);
405	lock_lsb = (unsigned int)lock_paddr;
406	lock_msb = (unsigned int)(lock_paddr>>32);
407
408	// call MWMR_DMA driver
409	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_MWMR_LSB, mwmr_lsb );
410	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_MWMR_MSB, mwmr_msb );
411	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_LOCK_LSB, lock_lsb );
412	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_LOCK_MSB, lock_msb );
413	}
414
415	#if GIET_DEBUG_COPROC
416	_printf("\n[GIET DEBUG COPROC] _sys_coproc_channel_init() in cluster[%d,%d]\n"
417	" channel = %d / mode = %d / buffer_size = %d\n"
418	" buffer_paddr = %l / mwmr_paddr = %l / lock_paddr = %l\n",
419	x , y , channel , mode , size ,
420	buffer_paddr, mwmr_paddr, lock_paddr );
421	#endif
422
423	return 0;
424	} // end _sys_coproc_channel_init()
425
426	////////////////////////////////////////////////////////
427	int _sys_coproc_channel_start( unsigned int cluster_xy,
428	unsigned int channel )
429	{
430	// TODO checking coprocessor ownership...
431
432	// check cluster coordinates
433	unsigned int cx = cluster_xy >> Y_WIDTH;
434	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
435	unsigned int procid = _get_procid();
436	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
437	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
438	if ( (x != cx) \|\| (y != cy) )
439	{
440	_printf("\n[GIET_ERROR] in _sys_coproc_channel_start():"
441	" wrong coordinates\n");
442	return -1;
443	}
444
445	// reset synchronisation variable
446	unsigned int coproc_id = (x * Y_SIZE) + y;
447	_coproc_done[coproc_id] = 0;
448
449	// call MWMR_DMA driver
450	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_RUNNING, 1 );
451
452	#if GIET_DEBUG_COPROC
453	_printf("\n[GIET DEBUG COPROC] _sys_coproc_channel_start() in cluster[%d,%d]"
454	" / channel = %d\n", x , y , channel );
455	#endif
456
457	return 0;
458	} // end _sys_coproc_channel_start()
459
460	///////////////////////////////////////////////////////
461	int _sys_coproc_channel_stop( unsigned int cluster_xy,
462	unsigned int channel )
463	{
464	// TODO checking coprocessor ownership...
465
466	// check cluster coordinates
467	unsigned int cx = cluster_xy >> Y_WIDTH;
468	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
469	unsigned int procid = _get_procid();
470	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
471	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
472	if ( (x != cx) \|\| (y != cy) )
473	{
474	_printf("\n[GIET_ERROR] in _sys_coproc_channel_stop(): wrong coordinates\n");
475	return -1;
476	}
477
478	// call MWMR_DMA driver
479	_mwr_set_channel_register( cluster_xy, channel, CHANNEL_RUNNING, 0 );
480
481	#if GIET_DEBUG_COPROC
482	_printf("\n[GIET DEBUG COPROC] _sys_coproc_channel_stop() in cluster[%d,%d]"
483	" / channel = %d\n", x , y , channel );
484	#endif
485
486	return 0;
487	} // end _sys_coproc_channel_stop()
488
489	/////////////////////////////////////////////////////
490	int _sys_coproc_completed( unsigned int cluster_xy )
491	{
492	// TODO checking coprocessor ownership...
493
494	// check cluster coordinates
495	unsigned int cx = cluster_xy >> Y_WIDTH;
496	unsigned int cy = cluster_xy & ((1<<Y_WIDTH)-1);
497	unsigned int procid = _get_procid();
498	unsigned int x = procid >> (Y_WIDTH + P_WIDTH);
499	unsigned int y = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
500	if ( (x != cx) \|\| (y != cy) )
501	{
502	_printf("\n[GIET_ERROR] in _sys_coproc_completed(): "
503	"wrong cluster coordinates\n");
504	return -1;
505	}
506
507	// polling the synchronisation variable
508	unsigned int coproc_id = (x * Y_SIZE) + y;
509	while ( ioread32( &_coproc_done[coproc_id]) == 0 ) asm volatile("nop");
510
511	_coproc_done[coproc_id] = 0;
512
513	#if GIET_DEBUG_COPROC
514	_printf("\n[GIET DEBUG COPROC] _sys_coproc_completed() in cluster[%d,%d]\n",
515	x, y );
516	#endif
517
518	return 0;
519	} // end _sys_coproc_completed()
520
521
522	//////////////////////////////////////////////////////////////////////////////
523	// TTY related syscall handlers
524	//////////////////////////////////////////////////////////////////////////////
525
526	////////////////////
527	int _sys_tty_alloc()
528	{
529	// get a new TTY terminal index
530	unsigned int channel = _atomic_increment( &_tty_channel_allocator, 1 );
531
532	if ( channel >= NB_TTY_CHANNELS )
533	{
534	_printf("\n[GIET_ERROR] in _sys_tty_alloc() : not enough TTY channels\n");
535	return -1;
536	}
537	else
538	{
539	_set_context_slot( CTX_TTY_ID, channel );
540	return 0;
541	}
542	}
543
544	/////////////////////////////////////////////////
545	int _sys_tty_write( const char* buffer,
546	unsigned int length, // number of characters
547	unsigned int channel) // channel index
548	{
549	unsigned int nwritten;
550
551	// compute and check tty channel
552	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
553	if( channel >= NB_TTY_CHANNELS ) return -1;
554
555	// write string to TTY channel
556	for (nwritten = 0; nwritten < length; nwritten++)
557	{
558	// check tty's status
559	if ( _tty_get_register( channel, TTY_STATUS ) & 0x2 ) break;
560
561	// write one byte
562	if (buffer[nwritten] == '\n')
563	{
564	_tty_set_register( channel, TTY_WRITE, (unsigned int)'\r' );
565	}
566	_tty_set_register( channel, TTY_WRITE, (unsigned int)buffer[nwritten] );
567	}
568
569	return nwritten;
570	}
571
572	////////////////////////////////////////////////
573	int _sys_tty_read( char* buffer,
574	unsigned int length, // unused
575	unsigned int channel) // channel index
576	{
577	// compute and check tty channel
578	if( channel == 0xFFFFFFFF ) channel = _get_context_slot(CTX_TTY_ID);
579	if( channel >= NB_TTY_CHANNELS ) return -1;
580
581	// read one character from TTY channel
582	if (_tty_rx_full[channel] == 0)
583	{
584	return 0;
585	}
586	else
587	{
588	*buffer = _tty_rx_buf[channel];
589	_tty_rx_full[channel] = 0;
590	return 1;
591	}
592	}
593
594	///////////////////////////////////////////
595	int _sys_tty_get_lock( unsigned int channel, // unused
596	unsigned int * save_sr_ptr )
597	{
598	// check tty channel
599	if( channel != 0 ) return 1;
600
601	_it_disable( save_sr_ptr );
602	_sqt_lock_acquire( &_tty0_sqt_lock );
603	return 0;
604	}
605
606	///////////////////////////////////////////////
607	int _sys_tty_release_lock( unsigned int channel,
608	unsigned int * save_sr_ptr )
609	{
610	// check tty channel
611	if( channel != 0 ) return 1;
612
613	_sqt_lock_release( &_tty0_sqt_lock );
614	_it_restore( save_sr_ptr );
615	return 0;
616	}
617
618	//////////////////////////////////////////////////////////////////////////////
619	// TIM related syscall handlers
620	//////////////////////////////////////////////////////////////////////////////
621
622	////////////////////
623	int _sys_tim_alloc()
624	{
625	// get a new timer index
626	unsigned int channel = _atomic_increment( &_tim_channel_allocator, 1 );
627
628	if ( channel >= NB_TIM_CHANNELS )
629	{
630	_printf("\n[GIET_ERROR] in _sys_tim_alloc() : not enough TIM channels\n");
631	return -1;
632	}
633	else
634	{
635	_set_context_slot( CTX_TIM_ID, channel );
636	return 0;
637	}
638	}
639
640	/////////////////////////////////////////
641	int _sys_tim_start( unsigned int period )
642	{
643	// get timer index
644	unsigned int channel = _get_context_slot( CTX_TIM_ID );
645	if ( channel >= NB_TIM_CHANNELS )
646	{
647	_printf("\n[GIET_ERROR] in _sys_tim_start() : not enough TIM channels\n");
648	return -1;
649	}
650
651	// start timer
652	_timer_start( channel, period );
653
654	return 0;
655	}
656
657	///////////////////
658	int _sys_tim_stop()
659	{
660	// get timer index
661	unsigned int channel = _get_context_slot( CTX_TIM_ID );
662	if ( channel >= NB_TIM_CHANNELS )
663	{
664	_printf("\n[GIET_ERROR] in _sys_tim_stop() : illegal timer index\n");
665	return -1;
666	}
667
668	// stop timer
669	_timer_stop( channel );
670
671	return 0;
672	}
673
674	//////////////////////////////////////////////////////////////////////////////
675	// NIC related syscall handlers
676	//////////////////////////////////////////////////////////////////////////////
677
678	#define NIC_CONTAINER_SIZE 4096
679
680	////////////////////////////////////////
681	int _sys_nic_alloc( unsigned int is_rx,
682	unsigned int xmax,
683	unsigned int ymax )
684	{
685	// check xmax / ymax parameters
686	if ( xmax > X_SIZE )
687	{
688	_printf("\n[GIET_ERROR] in _sys_nic_alloc() xmax argument too large\n");
689	return -1;
690	}
691	if ( ymax > Y_SIZE )
692	{
693	_printf("\n[GIET_ERROR] in _sys_nic_alloc() ymax argument too large\n");
694	return -1;
695	}
696
697	// get a NIC_RX or NIC_TX channel index
698	unsigned int nic_channel;
699	unsigned int cma_channel;
700
701	if ( is_rx ) nic_channel = _atomic_increment( &_nic_rx_channel_allocator, 1 );
702	else nic_channel = _atomic_increment( &_nic_tx_channel_allocator, 1 );
703
704	if ( (nic_channel >= NB_NIC_CHANNELS) )
705	{
706	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough NIC channels\n");
707	return -1;
708	}
709
710	// get a CMA channel index
711	cma_channel = _atomic_increment( &_cma_channel_allocator, 1 );
712
713	if ( cma_channel >= NB_CMA_CHANNELS )
714	{
715	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough CMA channels\n");
716	return -1;
717	}
718
719	#if GIET_DEBUG_NIC
720	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
721	_printf("\n[GIET DEBUG NIC] Task %d enters sys_nic_alloc() at cycle %d\n"
722	" nic_channel = %d / cma_channel = %d\n"
723	thread , _get_proctime() , nic_channel , cma_channel );
724	#endif
725
726	// register nic_index and cma_index in task context
727	if ( is_rx )
728	{
729	_set_context_slot( CTX_NIC_RX_ID, nic_channel );
730	_set_context_slot( CTX_CMA_RX_ID, cma_channel );
731	}
732	else
733	{
734	_set_context_slot( CTX_NIC_TX_ID, nic_channel );
735	_set_context_slot( CTX_CMA_TX_ID, cma_channel );
736	}
737
738	// physical addresses to be registered in the CMA registers
739	unsigned long long nic_chbuf_pbase; // NIC chbuf physical address
740	unsigned long long ker_chbuf_pbase; // kernel chbuf physical address
741
742	// These variables are used for the various V2P translation
743	unsigned int ptab = _get_context_slot(CTX_PTAB_ID);
744	unsigned int ppn;
745	unsigned int flags;
746	unsigned int vaddr;
747
748	// allocate one kernel container per cluster in the (xmax / ymax) mesh
749	unsigned int cx; // cluster X coordinate
750	unsigned int cy; // cluster Y coordinate
751	unsigned int index; // container index in chbuf
752	unsigned long long cont_paddr; // container physical address
753
754	for ( cx = 0 ; cx < xmax ; cx++ )
755	{
756	for ( cy = 0 ; cy < ymax ; cy++ )
757	{
758	// compute index in chbuf
759	index = (cx * ymax) + cy;
760
761	// allocate the kernel container
762	vaddr = (unsigned int)_remote_malloc( NIC_CONTAINER_SIZE, cx, cy );
763
764	if ( vaddr == 0 ) // not enough kernel heap memory in cluster[cx,cy]
765	{
766	_printf("\n[GIET_ERROR] in _sys_nic_alloc() not enough kenel heap"
767	" in cluster[%d,%d]\n", cx, cy );
768	return -1;
769	}
770
771	// compute container physical address
772	_v2p_translate( (page_table_t*)ptab,
773	vaddr>>12,
774	&ppn,
775	&flags );
776	cont_paddr = (((unsigned long long)ppn) << 12) \| (vaddr & 0x00000FFF);
777
778	// initialize chbuf entry
779	if ( is_rx ) _nic_rx_chbuf[nic_channel].buffer[index].desc = cont_paddr;
780	else _nic_tx_chbuf[nic_channel].buffer[index].desc = cont_paddr;
781
782	#if GIET_DEBUG_NIC
783	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_start()"
784	" allocates container in cluster[%d,%d] : vaddr = %x / paddr = %l\n",
785	thread , cx , cy , vaddr , cont_paddr );
786	#endif
787	}
788	}
789
790	// complete kernel chbuf initialisation
791	if ( is_rx )
792	{
793	_nic_rx_chbuf[nic_channel].xmax = xmax;
794	_nic_rx_chbuf[nic_channel].ymax = ymax;
795	}
796	else
797	{
798	_nic_tx_chbuf[nic_channel].xmax = xmax;
799	_nic_tx_chbuf[nic_channel].ymax = ymax;
800	}
801
802	// compute the NIC chbuf descriptor physical address
803	unsigned int offset;
804	if ( is_rx ) offset = 0x4000;
805	else offset = 0x4080;
806	nic_chbuf_pbase = (((unsigned long long)((X_IO << Y_WIDTH) + Y_IO))<<32) \|
807	(SEG_NIC_BASE + (nic_channel<<15) + offset);
808
809	#if GIET_DEBUG_NIC
810	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_start()"
811	" get NIC chbuf : paddr = %l\n",
812	thread , nic_chbuf_pbase );
813	#endif
814
815	// compute the kernel chbuf descriptor physical address
816	if ( is_rx ) vaddr = (unsigned int)( &_nic_rx_chbuf[nic_channel] );
817	else vaddr = (unsigned int)( &_nic_tx_chbuf[nic_channel] );
818	_v2p_translate( (page_table_t*)ptab,
819	vaddr>>12,
820	&ppn,
821	&flags );
822	ker_chbuf_pbase = (((unsigned long long)ppn) << 12) \| (vaddr & 0x00000FFF);
823
824	#if GIET_DEBUG_NIC
825	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_start()"
826	" get kernel chbuf : vaddr = %x / paddr = %l\n",
827	thread , vaddr , ker_chbuf_pbase );
828	#endif
829
830	// sync the kernel chbuf in L2 after write in L2
831	_mmc_sync( ker_chbuf_pbase, sizeof( nic_chbuf_t ) );
832
833	// initializes CMA registers defining the source & destination chbufs
834	if ( is_rx ) // NIC to kernel
835	{
836	_cma_set_register( cma_channel, CHBUF_SRC_DESC , (unsigned int)(nic_chbuf_pbase) );
837	_cma_set_register( cma_channel, CHBUF_SRC_EXT , (unsigned int)(nic_chbuf_pbase>>32) );
838	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, 2 );
839	_cma_set_register( cma_channel, CHBUF_DST_DESC , (unsigned int)(ker_chbuf_pbase) );
840	_cma_set_register( cma_channel, CHBUF_DST_EXT , (unsigned int)(ker_chbuf_pbase>>32) );
841	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, xmax * ymax );
842	}
843	else // kernel to NIC
844	{
845	_cma_set_register( cma_channel, CHBUF_SRC_DESC , (unsigned int)(ker_chbuf_pbase) );
846	_cma_set_register( cma_channel, CHBUF_SRC_EXT , (unsigned int)(ker_chbuf_pbase>>32) );
847	_cma_set_register( cma_channel, CHBUF_SRC_NBUFS, xmax * ymax );
848	_cma_set_register( cma_channel, CHBUF_DST_DESC , (unsigned int)(nic_chbuf_pbase) );
849	_cma_set_register( cma_channel, CHBUF_DST_EXT , (unsigned int)(nic_chbuf_pbase>>32) );
850	_cma_set_register( cma_channel, CHBUF_DST_NBUFS, 2 );
851	}
852
853	#if GIET_DEBUG_NIC
854	_printf("\n[GIET DEBUG NIC] Task %d exit _sys_nic_alloc() at cycle %d\n",
855	thread, _get_proctime() );
856	#endif
857
858	return nic_channel;
859	} // end _sys_nic_alloc()
860
861
862	////////////////////////////////////////
863	int _sys_nic_start( unsigned int is_rx,
864	unsigned int channel )
865	{
866	unsigned int nic_channel;
867	unsigned int cma_channel;
868
869	// get NIC channel index and CMA channel index from task context
870	if ( is_rx )
871	{
872	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
873	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
874	}
875	else
876	{
877	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
878	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
879	}
880
881	#if GIET_DEBUG_NIC
882	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
883	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_start() at cycle %d"
884	" get NIC channel = %d / CMA channel = %d\n",
885	thread, _get_proctime(), nic_channel, cma_channel );
886	#endif
887
888	// check NIC and CMA channels index
889	if ( nic_channel != channel )
890	{
891	_printf("\n[GIET_ERROR] in _sys_nic_start(): illegal NIC channel\n");
892	return -1;
893	}
894	if ( cma_channel >= NB_CMA_CHANNELS )
895	{
896	_printf("\n[GIET_ERROR] in _sys_nic_start(): illegal CMA channel\n");
897	return -1;
898	}
899
900	// start CMA transfer
901	_cma_set_register( cma_channel, CHBUF_BUF_SIZE , NIC_CONTAINER_SIZE );
902	_cma_set_register( cma_channel, CHBUF_PERIOD , 0 ); // OUT_OF_ORDER
903	_cma_set_register( cma_channel, CHBUF_RUN , 1 );
904
905	// activates NIC channel
906	_nic_channel_start( nic_channel, is_rx, GIET_NIC_MAC4, GIET_NIC_MAC2 );
907
908	#if GIET_DEBUG_NIC
909	_printf("\n[GIET DEBUG NIC] Task %d exit _sys_nic_start() at cycle %d\n",
910	thread , _get_proctime() );
911	#endif
912
913	return 0;
914	} // end _sys_nic_start()
915
916
917	//////////////////////////////////////
918	int _sys_nic_move( unsigned int is_rx,
919	unsigned int channel,
920	void* buffer )
921	{
922
923	#if GIET_DEBUG_NIC
924	unsigned int thread = _get_context_slot( CTX_TRDID_ID );
925	_printf("\n[GIET DEBUG NIC] Task %d enters _sys_nic_move() at cycle %d\n",
926	thread , _get_proctime() );
927	#endif
928
929	// check NIC channel index
930	if ( channel >= NB_NIC_CHANNELS )
931	{
932	_printf("\n[GIET_ERROR] in _sys_nic_move() : illegal NIC channel index\n");
933	return -1;
934	}
935
936	// get kernel chbuf virtual address
937	nic_chbuf_t* chbuf;
938	if ( is_rx ) chbuf = &_nic_rx_chbuf[channel];
939	else chbuf = &_nic_tx_chbuf[channel];
940
941	// get xmax / ymax parameters
942	unsigned int xmax = chbuf->xmax;
943	unsigned int ymax = chbuf->ymax;
944
945	// get cluster coordinates for the processor running the calling task
946	unsigned int procid = _get_procid();
947	unsigned int cx = procid >> (Y_WIDTH + P_WIDTH);
948	unsigned int cy = (procid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
949
950	// check processor coordinates / (xmax,ymax)
951	if ( cx >= xmax )
952	{
953	_printf("\n[GIET_ERROR] in _sys_nic_move() : processor X coordinate = %d"
954	" / xmax = %d\n", cx , xmax );
955	return -1;
956	}
957	if ( cy >= ymax )
958	{
959	_printf("\n[GIET_ERROR] in _sys_nic_move() : processor Y coordinate = %d"
960	" / ymax = %d\n", cy , ymax );
961	return -1;
962	}
963
964	unsigned long long user_buffer_paddr; // user buffer physical address
965	unsigned long long kernel_buffer_paddr; // kernel buffer physical address
966	unsigned long long kernel_chbuf_paddr; // kernel chbuf physical address
967	unsigned long long buffer_desc; // kernel buffer descriptor
968	unsigned long long buffer_desc_paddr; // kernel buffer descriptor physical address
969	unsigned int index; // kernel buffer index in chbuf
970
971	// The following variables are used for V2P translation
972	unsigned int ptab = _get_context_slot( CTX_PTAB_ID );
973	unsigned int ppn;
974	unsigned int flags;
975	unsigned int vaddr;
976
977	// Compute user buffer physical address and check access rights
978	vaddr = (unsigned int)buffer;
979	_v2p_translate( (page_table_t*)ptab,
980	vaddr>>12,
981	&ppn,
982	&flags );
983
984	if ( (flags & PTE_U) == 0 )
985	{
986	_printf("\n[GIET ERROR] in _sys_nic_tx_move() : illegal buffer address\n");
987	return -1;
988	}
989	user_buffer_paddr = ((unsigned long long)ppn << 12) \| (vaddr & 0x00000FFF);
990
991	#if GIET_DEBUG_NIC
992	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() get user buffer : paddr = %l\n",
993	thread, user_buffer_paddr );
994	#endif
995
996	// compute kernel chbuf physical address (required for sync)
997	vaddr = (unsigned int)chbuf;
998	_v2p_translate( (page_table_t*)ptab,
999	vaddr>>12,
1000	&ppn,
1001	&flags );
1002	kernel_chbuf_paddr = ((unsigned long long)ppn << 12) \| (vaddr & 0x00000FFF);
1003
1004	// poll local kernel container status until success
1005	while ( 1 )
1006	{
1007	// compute buffer index and buffer descriptor paddr
1008	index = (ymax * cx) + cy;
1009	buffer_desc_paddr = kernel_chbuf_paddr + (index<<6);
1010
1011	// inval buffer descriptor in L2 before read in L2
1012	_mmc_inval( buffer_desc_paddr , 8 );
1013	buffer_desc = chbuf->buffer[index].desc;
1014
1015	#if GIET_DEBUG_NIC
1016	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() read buffer descriptor %d\n"
1017	" at cycle = %d / paddr = %l / buffer descriptor = %l\n",
1018	thread, index, _get_proctime(), buffer_desc_paddr, buffer_desc );
1019	#endif
1020
1021	// test buffer status and break if found
1022	if ( ( is_rx != 0 ) && (buffer_desc >> 63) == 1 ) break;
1023	if ( ( is_rx == 0 ) && (buffer_desc >> 63) == 0 ) break;
1024	}
1025
1026	// compute kernel buffer physical address
1027	kernel_buffer_paddr = buffer_desc & 0x0000FFFFFFFFFFFFULL;
1028
1029	// move one container
1030	if ( is_rx ) // RX transfer
1031	{
1032	// inval kernel buffer in L2 before read in L2
1033	_mmc_inval( kernel_buffer_paddr, NIC_CONTAINER_SIZE );
1034
1035	// transfer data from kernel buffer to user buffer
1036	_physical_memcpy( user_buffer_paddr,
1037	kernel_buffer_paddr,
1038	NIC_CONTAINER_SIZE );
1039	#if GIET_DEBUG_NIC
1040	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() transfer "
1041	"kernel buffer %l to user buffer %l at cycle %d\n",
1042	thread , kernel_buffer_paddr , user_buffer_paddr , _get_proctime() );
1043	#endif
1044
1045	}
1046	else // TX transfer
1047	{
1048	// transfer data from user buffer to kernel buffer
1049	_physical_memcpy( kernel_buffer_paddr,
1050	user_buffer_paddr,
1051	NIC_CONTAINER_SIZE );
1052
1053	// sync kernel buffer in L2 after write in L2
1054	_mmc_sync( kernel_buffer_paddr, NIC_CONTAINER_SIZE );
1055
1056	#if GIET_DEBUG_NIC
1057	_printf("\n[GIET DEBUG NIC] Task %d in _sys_nic_move() transfer "
1058	"user buffer %l to kernel buffer %l at cycle %d\n",
1059	thread , user_buffer_paddr , kernel_buffer_paddr , _get_proctime() );
1060	#endif
1061
1062	}
1063
1064	// update kernel chbuf status
1065	if ( is_rx ) chbuf->buffer[index].desc = kernel_buffer_paddr & 0x0000FFFFFFFFFFFFULL;
1066	else chbuf->buffer[index].desc = kernel_buffer_paddr \| 0x8000000000000000ULL;
1067
1068	// sync kernel chbuf in L2 after write in L2
1069	_mmc_sync( kernel_chbuf_paddr + (index<<6) , 8 );
1070
1071	#if GIET_DEBUG_NIC
1072	_printf("\n[GIET DEBUG NIC] Task %d get buffer %d and exit _sys_nic_move() at cycle %d\n",
1073	thread , index , _get_proctime() );
1074	#endif
1075
1076	return 0;
1077	} // end _sys_nic_move()
1078
1079
1080	////////////////////////////////////////
1081	int _sys_nic_stop( unsigned int is_rx,
1082	unsigned int channel )
1083	{
1084	unsigned int nic_channel;
1085	unsigned int cma_channel;
1086
1087	// get NIC channel index and CMA channel index
1088	if ( is_rx )
1089	{
1090	nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1091	cma_channel = _get_context_slot( CTX_CMA_RX_ID );
1092	}
1093	else
1094	{
1095	nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1096	cma_channel = _get_context_slot( CTX_CMA_TX_ID );
1097	}
1098
1099	// check NIC and CMA channels index
1100	if ( nic_channel != channel )
1101	{
1102	_printf("\n[GIET_ERROR] in _sys_nic_stop(): illegal NIC channel\n");
1103	return -1;
1104	}
1105	if ( cma_channel >= NB_CMA_CHANNELS )
1106	{
1107	_printf("\n[GIET_ERROR] in _sys_nic_stop(): illegal CMA channel\n");
1108	return -1;
1109	}
1110
1111	// desactivates the NIC channel
1112	_nic_channel_stop( nic_channel, is_rx );
1113
1114	// desactivates the CMA channel
1115	_cma_set_register( cma_channel, CHBUF_RUN , 0 );
1116
1117	return 0;
1118	} // end _sys_nic_stop()
1119
1120	////////////////////////////////////////
1121	int _sys_nic_clear( unsigned int is_rx,
1122	unsigned int channel )
1123	{
1124	unsigned int nic_channel;
1125
1126	// get NIC channel
1127	if ( is_rx ) nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1128	else nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1129
1130	if ( nic_channel != channel )
1131	{
1132	_printf("\n[GIET_ERROR] in _sys_nic_clear(): illegal NIC channel\n");
1133	return -1;
1134	}
1135
1136	if ( is_rx )
1137	{
1138	_nic_set_global_register( NIC_G_NPKT_RX_G2S_RECEIVED , 0 );
1139	_nic_set_global_register( NIC_G_NPKT_RX_DES_TOO_SMALL , 0 );
1140	_nic_set_global_register( NIC_G_NPKT_RX_DES_TOO_BIG , 0 );
1141	_nic_set_global_register( NIC_G_NPKT_RX_DES_MFIFO_FULL , 0 );
1142	_nic_set_global_register( NIC_G_NPKT_RX_DES_CRC_FAIL , 0 );
1143	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_RECEIVED , 0 );
1144	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_BROADCAST , 0 );
1145	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_DST_FAIL , 0 );
1146	_nic_set_global_register( NIC_G_NPKT_RX_DISPATCH_CH_FULL , 0 );
1147	}
1148	else
1149	{
1150	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_RECEIVED , 0 );
1151	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TRANSMIT , 0 );
1152	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_BIG , 0 );
1153	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_SMALL , 0 );
1154	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_SRC_FAIL , 0 );
1155	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_BYPASS , 0 );
1156	_nic_set_global_register( NIC_G_NPKT_TX_DISPATCH_BROADCAST , 0 );
1157	}
1158	return 0;
1159	} // en _sys_nic_clear()
1160
1161	////////////////////////////////////////
1162	int _sys_nic_stats( unsigned int is_rx,
1163	unsigned int channel )
1164	{
1165	unsigned int nic_channel;
1166
1167	// get NIC channel
1168	if ( is_rx ) nic_channel = _get_context_slot( CTX_NIC_RX_ID );
1169	else nic_channel = _get_context_slot( CTX_NIC_TX_ID );
1170
1171	if ( nic_channel != channel )
1172	{
1173	_printf("\n[GIET_ERROR] in _sys_nic_stats(): illegal NIC channel\n");
1174	return -1;
1175	}
1176
1177	if ( is_rx )
1178	{
1179	unsigned int received = _nic_get_global_register( NIC_G_NPKT_RX_G2S_RECEIVED );
1180	unsigned int too_small = _nic_get_global_register( NIC_G_NPKT_RX_DES_TOO_SMALL );
1181	unsigned int too_big = _nic_get_global_register( NIC_G_NPKT_RX_DES_TOO_BIG );
1182	unsigned int fifo_full = _nic_get_global_register( NIC_G_NPKT_RX_DES_MFIFO_FULL );
1183	unsigned int crc_fail = _nic_get_global_register( NIC_G_NPKT_RX_DES_CRC_FAIL );
1184	unsigned int broadcast = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_BROADCAST );
1185	unsigned int dst_fail = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_DST_FAIL );
1186	unsigned int ch_full = _nic_get_global_register( NIC_G_NPKT_RX_DISPATCH_CH_FULL );
1187
1188	_printf("\n### Network Controller RX Statistics ###\n"
1189	"- packets received : %d\n"
1190	"- too small : %d\n"
1191	"- too big : %d\n"
1192	"- fifo full : %d\n"
1193	"- crc fail : %d\n"
1194	"- dst mac fail : %d\n"
1195	"- channel full : %d\n"
1196	"- broadcast : %d\n",
1197	received,
1198	too_small,
1199	too_big,
1200	fifo_full,
1201	crc_fail,
1202	dst_fail,
1203	ch_full,
1204	broadcast );
1205	}
1206	else
1207	{
1208	unsigned int received = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_RECEIVED );
1209	unsigned int too_big = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_BIG );
1210	unsigned int too_small = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_TOO_SMALL );
1211	unsigned int src_fail = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_SRC_FAIL );
1212	unsigned int bypass = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_BYPASS );
1213	unsigned int broadcast = _nic_get_global_register( NIC_G_NPKT_TX_DISPATCH_BROADCAST );
1214
1215	_printf("\n### Network Controller TX Statistics ###\n"
1216	"- packets received : %d\n"
1217	"- too small : %d\n"
1218	"- too big : %d\n"
1219	"- src mac fail : %d\n"
1220	"- bypass : %d\n"
1221	"- broadcast : %d\n",
1222	received,
1223	too_big,
1224	too_small,
1225	src_fail,
1226	bypass,
1227	broadcast );
1228	}
1229	return 0;
1230	} // end _sys_nic_stats()
1231
1232	/////////////////////////////////////////////////////////////////////////////////////////
1233	// FBF related syscall handlers
1234	/////////////////////////////////////////////////////////////////////////////////////////
1235
1236	/////////////////////////////////////////////
1237	int _sys_fbf_sync_write( unsigned int offset,
1238	void* buffer,
1239	unsigned int length )
1240	{
1241	char* fbf_address = (char *)SEG_FBF_BASE + offset;
1242	memcpy( fbf_address, buffer, length);
1243
1244	return 0;
1245	}
1246
1247	/////////////////////////////////////////////
1248	int _sys_fbf_sync_read( unsigned int offset,
1249	void* buffer,
1250	unsigned int length )
1251	{
1252	char* fbf_address = (char *)SEG_FBF_BASE + offset;
1253	memcpy( buffer, fbf_address, length);
1254
1255	return 0;
1256	}
1257
1258	////////////////////////
1259	int _sys_fbf_cma_alloc()
1260	{
1261	// get a new CMA channel index
1262	unsigned int channel = _atomic_increment( &_cma_channel_allocator, 1 );
1263
1264	if ( channel >= NB_CMA_CHANNELS )
1265	{
1266	_printf("\n[GIET ERROR] in _sys_fbf_cma_alloc() : not enough CMA channels\n");
1267	return -1;
1268	}
1269	else
1270	{
1271	_set_context_slot( CTX_CMA_FB_ID, channel );
1272	return 0;
1273	}
1274	} // end sys_fbf_cma_alloc()
1275
1276	////////////////////////////////////////////
1277	int _sys_fbf_cma_start( void* vbase0,
1278	void* vbase1,
1279	unsigned int length )
1280	{
1281	#if NB_CMA_CHANNELS > 0
1282
1283	unsigned int ptab; // page table virtual address
1284	unsigned int vaddr; // virtual address
1285	unsigned int flags; // protection flags
1286	unsigned int ppn; // physical page number
1287
1288	// get channel index
1289	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1290
1291	if ( channel >= NB_CMA_CHANNELS )
1292	{
1293	_printf("\n[GIET ERROR] in _fbf_cma_start() : CMA channel index too large\n");
1294	return -1;
1295	}
1296
1297	#if GIET_DEBUG_FBF_CMA
1298	_printf("\n[FBF_CMA DEBUG] enters _sys_fbf_cma_start()\n"
1299	" - channel = %d\n"
1300	" - buf0 vbase = %x\n"
1301	" - buf1 vbase = %x\n"
1302	" - buffer size = %x\n",
1303	channel,
1304	(unsigned int)vbase0,
1305	(unsigned int)vbase1,
1306	length );
1307	#endif
1308
1309	// checking user buffers virtual addresses and length alignment
1310	if ( ((unsigned int)vbase0 & 0x3) \|\| ((unsigned int)vbase1 & 0x3) \|\| (length & 0x3) )
1311	{
1312	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer not word aligned\n");
1313	return -1;
1314	}
1315
1316	// get page table virtual address
1317	ptab = _get_context_slot(CTX_PTAB_ID);
1318
1319	// compute frame buffer physical address and initialize _fbf_chbuf[channel]
1320	vaddr = ((unsigned int)SEG_FBF_BASE);
1321	_v2p_translate( (page_table_t*) ptab,
1322	(vaddr >> 12),
1323	&ppn,
1324	&flags );
1325
1326	_fbf_chbuf[channel].fbf.desc = ((paddr_t)ppn << 12) \| (vaddr & 0x00000FFF);
1327
1328	// Compute user buffer 0 physical addresses and intialize _fbf_chbuf[channel]
1329	vaddr = (unsigned int)vbase0;
1330	_v2p_translate( (page_table_t*) ptab,
1331	(vaddr >> 12),
1332	&ppn,
1333	&flags );
1334	if ((flags & PTE_U) == 0)
1335	{
1336	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer 0 not in user space\n");
1337	return -1;
1338	}
1339
1340	_fbf_chbuf[channel].buf0.desc = ((paddr_t)ppn << 12) \| (vaddr & 0x00000FFF);
1341
1342	// Compute user buffer 1 physical addresses and intialize _fbf_chbuf[channel]
1343	vaddr = (unsigned int)vbase1;
1344	_v2p_translate( (page_table_t*) ptab,
1345	(vaddr >> 12),
1346	&ppn,
1347	&flags );
1348	if ((flags & PTE_U) == 0)
1349	{
1350	_printf("\n[GIET ERROR] in _fbf_cma_start() : user buffer 1 not in user space\n");
1351	return -1;
1352	}
1353
1354	_fbf_chbuf[channel].buf1.desc = ((paddr_t)ppn << 12) \| (vaddr & 0x00000FFF);
1355
1356	// initializes buffer length
1357	_fbf_chbuf[channel].length = length;
1358
1359	// Compute and register physical adress of the fbf_chbuf descriptor
1360	vaddr = (unsigned int)(&_fbf_chbuf[channel]);
1361	_v2p_translate( (page_table_t*) ptab,
1362	(vaddr >> 12),
1363	&ppn,
1364	&flags );
1365
1366	_fbf_chbuf_paddr[channel] = (((paddr_t)ppn) << 12) \| (vaddr & 0x00000FFF);
1367
1368	if ( USE_IOB )
1369	{
1370	// SYNC request for fbf_chbuf descriptor
1371	_mmc_sync( _fbf_chbuf_paddr[channel] , sizeof( fbf_chbuf_t ) );
1372	}
1373
1374	#if GIET_DEBUG_FBF_CMA
1375	_printf(" - fbf pbase = %l\n"
1376	" - buf0 pbase = %l\n"
1377	" - buf1 pbase = %l\n"
1378	" - chbuf pbase = %l\n",
1379	_fbf_chbuf[channel].fbf.desc,
1380	_fbf_chbuf[channel].buf0.desc,
1381	_fbf_chbuf[channel].buf1.desc,
1382	_fbf_chbuf_paddr[channel] );
1383	#endif
1384
1385	// start CMA transfer
1386	unsigned long long paddr = _fbf_chbuf_paddr[channel];
1387	unsigned int src_chbuf_paddr_lsb = (unsigned int)(paddr & 0xFFFFFFFF);
1388	unsigned int src_chbuf_paddr_ext = (unsigned int)(paddr >> 32);
1389	unsigned int dst_chbuf_paddr_lsb = src_chbuf_paddr_lsb + 128;
1390	unsigned int dst_chbuf_paddr_ext = src_chbuf_paddr_ext;
1391
1392	_cma_set_register( channel, CHBUF_SRC_DESC , src_chbuf_paddr_lsb );
1393	_cma_set_register( channel, CHBUF_SRC_EXT , src_chbuf_paddr_ext );
1394	_cma_set_register( channel, CHBUF_SRC_NBUFS, 2 );
1395	_cma_set_register( channel, CHBUF_DST_DESC , dst_chbuf_paddr_lsb );
1396	_cma_set_register( channel, CHBUF_DST_EXT , dst_chbuf_paddr_ext );
1397	_cma_set_register( channel, CHBUF_DST_NBUFS, 1 );
1398	_cma_set_register( channel, CHBUF_BUF_SIZE , length );
1399	_cma_set_register( channel, CHBUF_PERIOD , 300 );
1400	_cma_set_register( channel, CHBUF_RUN , 1 );
1401
1402	return 0;
1403
1404	#else
1405
1406	_printf("\n[GIET ERROR] in _sys_fbf_cma_start() : NB_CMA_CHANNELS = 0\n");
1407	return -1;
1408
1409	#endif
1410	} // end _sys_fbf_cma_start()
1411
1412	/////////////////////////////////////////////////////
1413	int _sys_fbf_cma_display( unsigned int buffer_index )
1414	{
1415	#if NB_CMA_CHANNELS > 0
1416
1417	volatile unsigned int full = 1;
1418
1419	// get channel index
1420	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1421
1422	if ( channel >= NB_CMA_CHANNELS )
1423	{
1424	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : "
1425	"CMA channel index too large\n");
1426	return -1;
1427	}
1428
1429	// get fbf_chbuf descriptor pointer
1430	fbf_chbuf_t* pdesc = &_fbf_chbuf[channel];
1431
1432	#if GIET_DEBUG_FBF_CMA
1433	_printf("\n[FBF_CMA DEBUG] enters _sys_fb_cma_display()\n"
1434	" - cma channel = %d\n"
1435	" - buffer index = %d\n"
1436	" - buf0_desc value = %l\n"
1437	" - buf1_desc value = %l\n"
1438	" - fbf_desc value = %l\n",
1439	channel , buffer_index,
1440	_fbf_chbuf[channel].buf0.desc,
1441	_fbf_chbuf[channel].buf1.desc,
1442	_fbf_chbuf[channel].fbf.desc );
1443	#endif
1444
1445	if ( buffer_index == 0 ) // user buffer 0
1446	{
1447	// INVAL L1 and L2 cache copies of user buffer descriptor,
1448	// because it has been modified in RAM by the CMA component
1449	_dcache_buf_invalidate( (unsigned int)pdesc , sizeof(buffer_descriptor_t) );
1450	_mmc_inval( _fbf_chbuf_paddr[channel] , sizeof(buffer_descriptor_t) );
1451
1452	// waiting user buffer released by the CMA component)
1453	while ( full )
1454	{
1455	full = (unsigned int)(pdesc->buf0.desc >> 63);
1456	}
1457
1458	// SYNC request for the user buffer, because
1459	// it will be read from XRAM by the CMA component
1460	_mmc_sync( pdesc->buf0.desc , pdesc->length );
1461
1462	// set user buffer status
1463	pdesc->buf0.desc = pdesc->buf0.desc \| 0x8000000000000000ULL;
1464
1465	// reset fbf buffer status
1466	pdesc->fbf.desc = pdesc->fbf.desc & 0x7FFFFFFFFFFFFFFFULL;
1467
1468	// SYNC request, because these buffer descriptors
1469	// will be read from XRAM by the CMA component
1470	_mmc_sync( _fbf_chbuf_paddr[channel] , sizeof(fbf_chbuf_t) );
1471	}
1472	else // user buffer 1
1473	{
1474	// INVAL L1 and L2 cache copies of user buffer descriptor,
1475	// because it has been modified in RAM by the CMA component
1476	_dcache_buf_invalidate( (unsigned int)pdesc + 64, sizeof(buffer_descriptor_t) );
1477	_mmc_inval( _fbf_chbuf_paddr[channel] + 64, sizeof(buffer_descriptor_t) );
1478
1479	// waiting user buffer released by the CMA component)
1480	while ( full )
1481	{
1482	full = (unsigned int)(pdesc->buf1.desc >> 63);
1483	}
1484
1485	// SYNC request for the user buffer, because
1486	// it will be read from XRAM by the CMA component
1487	_mmc_sync( pdesc->buf1.desc , pdesc->length );
1488
1489	// set user buffer status
1490	pdesc->buf1.desc = pdesc->buf1.desc \| 0x8000000000000000ULL;
1491
1492	// reset fbf buffer status
1493	pdesc->fbf.desc = pdesc->fbf.desc & 0x7FFFFFFFFFFFFFFFULL;
1494
1495	// SYNC request, because these buffer descriptors
1496	// will be read from XRAM by the CMA component
1497	_mmc_sync( _fbf_chbuf_paddr[channel] , sizeof(fbf_chbuf_t) );
1498	}
1499
1500	#if GIET_DEBUG_FBF_CMA
1501	_printf("\n[FBF_CMA DEBUG] exit _sys_fb_cma_display()\n"
1502	" - buf0_desc value = %l\n"
1503	" - buf1_desc value = %l\n"
1504	" - fbf_desc value = %l\n",
1505	_fbf_chbuf[channel].buf0.desc,
1506	_fbf_chbuf[channel].buf1.desc,
1507	_fbf_chbuf[channel].fbf.desc );
1508	#endif
1509
1510	return 0;
1511
1512	#else
1513
1514	_printf("\n[GIET ERROR] in _sys_fbf_cma_display() : no CMA channel allocated\n");
1515	return -1;
1516
1517	#endif
1518	} // end _sys_fbf_cma_display()
1519
1520
1521	///////////////////////
1522	int _sys_fbf_cma_stop()
1523	{
1524	#if NB_CMA_CHANNELS > 0
1525
1526	// get channel index
1527	unsigned int channel = _get_context_slot( CTX_CMA_FB_ID );
1528
1529	if ( channel >= NB_CMA_CHANNELS )
1530	{
1531	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : CMA channel index too large\n");
1532	return -1;
1533	}
1534
1535	// Desactivate CMA channel
1536	_cma_set_register( channel, CHBUF_RUN, 0 );
1537
1538	return 0;
1539
1540	#else
1541
1542	_printf("\n[GIET ERROR] in _sys_fbf_cma_stop() : no CMA channel allocated\n");
1543	return -1;
1544
1545	#endif
1546	} // end _sys_fbf_cma_stop()
1547
1548
1549	//////////////////////////////////////////////////////////////////////////////
1550	// Miscelaneous syscall handlers
1551	//////////////////////////////////////////////////////////////////////////////
1552
1553	///////////////
1554	int _sys_ukn()
1555	{
1556	_printf("\n[GIET ERROR] Undefined System Call / EPC = %x\n", _get_epc() );
1557	return -1;
1558	}
1559
1560	////////////////////////////////////
1561	int _sys_proc_xyp( unsigned int* x,
1562	unsigned int* y,
1563	unsigned int* p )
1564	{
1565	unsigned int gpid = _get_procid(); // global processor index from CPO register
1566
1567	*x = (gpid >> (Y_WIDTH + P_WIDTH)) & ((1<<X_WIDTH)-1);
1568	*y = (gpid >> P_WIDTH) & ((1<<Y_WIDTH)-1);
1569	*p = gpid & ((1<<P_WIDTH)-1);
1570
1571	return 0;
1572	}
1573
1574	//////////////////////////////////
1575	int _sys_task_exit( char* string )
1576	{
1577	unsigned int date = _get_proctime();
1578
1579	unsigned int gpid = _get_procid();
1580	unsigned int cluster_xy = gpid >> P_WIDTH;
1581	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
1582	unsigned int x = cluster_xy >> Y_WIDTH;
1583	unsigned int lpid = gpid & ((1<<P_WIDTH)-1);
1584
1585	unsigned int task_id = _get_context_slot(CTX_LTID_ID);
1586
1587	// print exit message
1588	_printf("\n[GIET] Exit task %d on processor[%d,%d,%d] at cycle %d"
1589	"\n Cause : %s\n\n",
1590	task_id, x, y, lpid, date, string );
1591
1592	// goes to sleeping state
1593	_set_context_slot(CTX_RUN_ID, 0);
1594
1595	// deschedule
1596	_context_switch();
1597
1598	return 0;
1599	}
1600
1601	//////////////////////
1602	int _context_switch()
1603	{
1604	unsigned int save_sr;
1605
1606	_it_disable( &save_sr );
1607	_ctx_switch();
1608	_it_restore( &save_sr );
1609
1610	return 0;
1611	}
1612
1613	////////////////////////
1614	int _sys_local_task_id()
1615	{
1616	return _get_context_slot(CTX_LTID_ID);
1617	}
1618
1619	/////////////////////////
1620	int _sys_global_task_id()
1621	{
1622	return _get_context_slot(CTX_GTID_ID);
1623	}
1624
1625	////////////////////
1626	int _sys_thread_id()
1627	{
1628	return _get_context_slot(CTX_TRDID_ID);
1629	}
1630
1631	////////////////////////////////////////////
1632	int _sys_procs_number( unsigned int* x_size,
1633	unsigned int* y_size,
1634	unsigned int* nprocs )
1635	{
1636	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1637	mapping_cluster_t * cluster = _get_cluster_base(header);
1638
1639	unsigned int x;
1640	unsigned int y;
1641	unsigned int okmin = 1;
1642	unsigned int okmax = 1;
1643
1644	// compute max values
1645	unsigned int xmax = header->x_size;
1646	unsigned int ymax = header->y_size;
1647	unsigned int procs = cluster[0].procs;
1648
1649	// check the (ymax-1) lower rows
1650	for ( y = 0 ; y < ymax-1 ; y++ )
1651	{
1652	for ( x = 0 ; x < xmax ; x++ )
1653	{
1654	if (cluster[x*ymax+y].procs != procs ) okmin = 0;
1655	}
1656	}
1657
1658	// check the upper row
1659	for ( x = 0 ; x < xmax ; x++ )
1660	{
1661	if (cluster[x*ymax+ymax-1].procs != procs ) okmax = 0;
1662	}
1663
1664	// return values
1665	if ( okmin && okmax )
1666	{
1667	*x_size = xmax;
1668	*y_size = ymax;
1669	*nprocs = procs;
1670	}
1671	else if ( okmin )
1672	{
1673	*x_size = xmax;
1674	*y_size = ymax-1;
1675	*nprocs = procs;
1676	}
1677	else
1678	{
1679	*x_size = 0;
1680	*y_size = 0;
1681	*nprocs = 0;
1682	}
1683	return 0;
1684	}
1685
1686	///////////////////////////////////////////////////////
1687	int _sys_vseg_get_vbase( char* vspace_name,
1688	char* vseg_name,
1689	unsigned int* vbase )
1690	{
1691	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1692	mapping_vspace_t * vspace = _get_vspace_base(header);
1693	mapping_vseg_t * vseg = _get_vseg_base(header);
1694
1695	unsigned int vspace_id;
1696	unsigned int vseg_id;
1697
1698	// scan vspaces
1699	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1700	{
1701	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
1702	{
1703	// scan vsegs
1704	for (vseg_id = vspace[vspace_id].vseg_offset;
1705	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
1706	vseg_id++)
1707	{
1708	if (_strncmp(vseg[vseg_id].name, vseg_name, 31) == 0)
1709	{
1710	*vbase = vseg[vseg_id].vbase;
1711	return 0;
1712	}
1713	}
1714	}
1715	}
1716	return -1; // not found
1717	}
1718
1719	/////////////////////////////////////////////////////////
1720	int _sys_vseg_get_length( char* vspace_name,
1721	char* vseg_name,
1722	unsigned int* length )
1723	{
1724	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1725	mapping_vspace_t * vspace = _get_vspace_base(header);
1726	mapping_vseg_t * vseg = _get_vseg_base(header);
1727
1728	unsigned int vspace_id;
1729	unsigned int vseg_id;
1730
1731	// scan vspaces
1732	for (vspace_id = 0; vspace_id < header->vspaces; vspace_id++)
1733	{
1734	if (_strncmp( vspace[vspace_id].name, vspace_name, 31) == 0)
1735	{
1736	// scan vsegs
1737	for (vseg_id = vspace[vspace_id].vseg_offset;
1738	vseg_id < (vspace[vspace_id].vseg_offset + vspace[vspace_id].vsegs);
1739	vseg_id++)
1740	{
1741	if (_strncmp(vseg[vseg_id].name, vseg_name, 31) == 0)
1742	{
1743	*length = vseg[vseg_id].length;
1744	return 0;
1745	}
1746	}
1747	}
1748	}
1749	return -1; // not found
1750	}
1751
1752	////////////////////////////////////////
1753	int _sys_xy_from_ptr( void* ptr,
1754	unsigned int* x,
1755	unsigned int* y )
1756	{
1757	unsigned int ppn;
1758	unsigned int flags;
1759	unsigned int vpn = (((unsigned int)ptr)>>12);
1760
1761	// get the page table pointer
1762	page_table_t* pt = (page_table_t*)_get_context_slot( CTX_PTAB_ID );
1763
1764	// compute the physical address
1765	_v2p_translate( pt, vpn, &ppn, &flags );
1766
1767	*x = (ppn>>24) & 0xF;
1768	*y = (ppn>>20) & 0xF;
1769	return 0;
1770	}
1771
1772	/////////////////////////////////////////
1773	int _sys_heap_info( unsigned int* vaddr,
1774	unsigned int* length,
1775	unsigned int x,
1776	unsigned int y )
1777	{
1778	mapping_header_t * header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
1779	mapping_task_t * task = _get_task_base(header);
1780	mapping_vseg_t * vseg = _get_vseg_base(header);
1781	mapping_vspace_t * vspace = _get_vspace_base(header);
1782
1783	unsigned int task_id;
1784	unsigned int vspace_id;
1785	unsigned int vseg_id = 0xFFFFFFFF;
1786
1787	// searching the heap vseg
1788	if ( (x < X_SIZE) && (y < Y_SIZE) ) // searching a task in cluster(x,y)
1789	{
1790	// get vspace global index
1791	vspace_id = _get_context_slot(CTX_VSID_ID);
1792
1793	// scan all tasks in vspace
1794	unsigned int min = vspace[vspace_id].task_offset ;
1795	unsigned int max = min + vspace[vspace_id].tasks ;
1796	for ( task_id = min ; task_id < max ; task_id++ )
1797	{
1798	if ( task[task_id].clusterid == (x * Y_SIZE + y) )
1799	{
1800	vseg_id = task[task_id].heap_vseg_id;
1801	if ( vseg_id != 0xFFFFFFFF ) break;
1802	}
1803	}
1804	}
1805	else // searching in the calling task
1806	{
1807	task_id = _get_context_slot(CTX_GTID_ID);
1808	vseg_id = task[task_id].heap_vseg_id;
1809	}
1810
1811	// analysing the vseg_id
1812	if ( vseg_id != 0xFFFFFFFF )
1813	{
1814	*vaddr = vseg[vseg_id].vbase;
1815	*length = vseg[vseg_id].length;
1816	return 0;
1817	}
1818	else
1819	{
1820	*vaddr = 0;
1821	*length = 0;
1822	return -1;
1823	}
1824	} // end _sys_heap_info()
1825
1826
1827	// Local Variables:
1828	// tab-width: 4
1829	// c-basic-offset: 4
1830	// c-file-offsets:((innamespace . 0)(inline-open . 0))
1831	// indent-tabs-mode: nil
1832	// End:
1833	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
1834

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