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source: soft/giet_vm/giet_kernel/irq_handler.c @ 529

Last change on this file since 529 was 528, checked in by alain, 10 years ago
1) Introducing support for external IRQs dynamic routing. 2) Simplifying the _v2p_translate() function. 3) Removing the generic IOC driver (integrated in the FAT library).
Property svn:executable set to ``*
File size: 14.6 KB

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1	///////////////////////////////////////////////////////////////////////////
2	// File : irq_handler.c
3	// Date : 01/04/2012
4	// Author : alain greiner
5	// Copyright (c) UPMC-LIP6
6	///////////////////////////////////////////////////////////////////////////
7
8	#include <giet_config.h>
9	#include <irq_handler.h>
10	#include <sys_handler.h>
11	#include <ctx_handler.h>
12	#include <tim_driver.h>
13	#include <xcu_driver.h>
14	#include <pic_driver.h>
15	#include <tty_driver.h>
16	#include <nic_driver.h>
17	#include <cma_driver.h>
18	#include <mmc_driver.h>
19	#include <bdv_driver.h>
20	#include <dma_driver.h>
21	#include <spi_driver.h>
22	#include <mwr_driver.h>
23	#include <mapping_info.h>
24	#include <utils.h>
25	#include <tty0.h>
26
27	/////////////////////////////////////////////////////////////////////////
28	// Global variables
29	/////////////////////////////////////////////////////////////////////////
30
31	// array of external IRQ indexes for each (isr/channel) couple
32	__attribute__((section(".kdata")))
33	unsigned char _ext_irq_index[GIET_ISR_TYPE_MAX][GIET_ISR_CHANNEL_MAX];
34
35	// WTI mailbox allocators for external IRQ routing (3 allocators per proc)
36	__attribute__((section(".kdata")))
37	unsigned char _wti_alloc_one[X_SIZE][Y_SIZE][NB_PROCS_MAX];
38	__attribute__((section(".kdata")))
39	unsigned char _wti_alloc_two[X_SIZE][Y_SIZE][NB_PROCS_MAX];
40	__attribute__((section(".kdata")))
41	unsigned char _wti_alloc_ter[X_SIZE][Y_SIZE][NB_PROCS_MAX];
42
43	/////////////////////////////////////////////////////////////////////////
44	// this array is allocated in the boot.c or kernel_init.c
45	/////////////////////////////////////////////////////////////////////////
46
47	extern static_scheduler_t* _schedulers[X_SIZE][Y_SIZE][NB_PROCS_MAX];
48
49	/////////////////////////////////////////////////////////////////////////
50	// These ISR_TYPE names for display must be consistent with values in
51	// irq_handler.h / mapping.py / xml_driver.c
52	/////////////////////////////////////////////////////////////////////////
53	__attribute__((section(".kdata")))
54	char* _isr_type_name[] = { "DEFAULT",
55	"TICK" ,
56	"TTY_RX" ,
57	"TTY_TX" ,
58	"BDV" ,
59	"TIMER" ,
60	"WAKUP" ,
61	"NIC_RX" ,
62	"NIC_TX" ,
63	"CMA" ,
64	"MMC" ,
65	"DMA" ,
66	"SPI" ,
67	"MWR" ,
68	"HBA" };
69
70	////////////////////
71	void _ext_irq_init()
72	{
73	mapping_header_t* header = (mapping_header_t *)SEG_BOOT_MAPPING_BASE;
74	mapping_cluster_t* cluster = _get_cluster_base(header);
75	mapping_periph_t* periph = _get_periph_base(header);
76	mapping_irq_t* irq = _get_irq_base(header);
77	unsigned int periph_id; // peripheral index in mapping_info
78	unsigned int irq_id; // irq index in mapping_info
79
80	// get cluster_io index in mapping
81	unsigned int x_io = header->x_io;
82	unsigned int y_io = header->y_io;
83	unsigned int cluster_io = (x_io * Y_SIZE) + y_io;
84	mapping_periph_t* pic = NULL;
85
86	// scan external peripherals to find XCU
87	unsigned int min = cluster[cluster_io].periph_offset ;
88	unsigned int max = min + cluster[cluster_io].periphs ;
89
90	for ( periph_id = min ; periph_id < max ; periph_id++ )
91	{
92	if ( periph[periph_id].type == PERIPH_TYPE_PIC )
93	{
94	pic = &periph[periph_id];
95	break;
96	}
97	}
98
99	if ( pic == NULL )
100	{
101	_printf("\n[GIET ERROR] in _ext_irq_init() : No PIC component found\n");
102	_exit();
103	}
104
105	// scan PIC IRQS defined in mapping
106	for ( irq_id = pic->irq_offset ;
107	irq_id < pic->irq_offset + pic->irqs ;
108	irq_id++ )
109	{
110	unsigned int type = irq[irq_id].srctype;
111	unsigned int srcid = irq[irq_id].srcid;
112	unsigned int isr = irq[irq_id].isr;
113	unsigned int channel = irq[irq_id].channel;
114
115	if ( (type != IRQ_TYPE_HWI) \|\|
116	(srcid > 31) \|\|
117	(isr >= GIET_ISR_TYPE_MAX) \|\|
118	(channel >= GIET_ISR_CHANNEL_MAX) )
119	{
120	_printf("\n[GIET ERROR] in _ext_irq_init() : Bad PIC IRQ\n"
121	" type = %d / srcid = %d / isr = %d / channel = %d\n",
122	type , srcid , isr , channel );
123	_exit();
124	}
125	_ext_irq_index[isr][channel] = srcid;
126	}
127	} // end _ext_irq_init()
128
129	////////////////////////////////////////////
130	void _ext_irq_alloc( unsigned int isr_type,
131	unsigned int isr_channel,
132	unsigned int* wti_index )
133	{
134	unsigned int wti_id; // allocated WTI mailbox index in XCU
135	unsigned int irq_id; // external IRQ index in PIC (input)
136	unsigned int wti_addr; // WTI mailbox physical address (32 lsb bits)
137
138	// check arguments
139	if ( isr_type >= GIET_ISR_TYPE_MAX )
140	{
141	_printf("\n[GIET ERROR] in _ext_irq_alloc() : illegal ISR type\n");
142	_exit();
143	}
144	if ( isr_channel >= GIET_ISR_CHANNEL_MAX )
145	{
146	_printf("\n[GIET ERROR] in _ext_irq_alloc() : illegal ISR channel\n");
147	_exit();
148	}
149
150	// get processor coordinates [x,y,p]
151	unsigned int gpid = _get_procid();
152	unsigned int cluster_xy = gpid >> P_WIDTH;
153	unsigned int x = cluster_xy >> Y_WIDTH;
154	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
155	unsigned int p = gpid & ((1<<P_WIDTH)-1);
156
157	// allocate a WTI mailbox to proc[x,y,p] (blocking until success)
158	while ( 1 )
159	{
160	if ( _wti_alloc_one[x][y][p] == 0 )
161	{
162	_wti_alloc_one[x][y][p] = 1;
163	wti_id = p + NB_PROCS_MAX;
164	break;
165	}
166	if ( _wti_alloc_two[x][y][p] == 0 )
167	{
168	_wti_alloc_two[x][y][p] = 1;
169	wti_id = p + 2*NB_PROCS_MAX;
170	break;
171	}
172	if ( _wti_alloc_ter[x][y][p] == 0 )
173	{
174	_wti_alloc_ter[x][y][p] = 1;
175	wti_id = p + 3*NB_PROCS_MAX;
176	break;
177	}
178	}
179	*wti_index = wti_id;
180
181	// register the mailbox physical address in IOPIC
182	irq_id = _ext_irq_index[isr_type][isr_channel];
183	_xcu_get_wti_address( wti_id , &wti_addr );
184	_pic_init( irq_id , wti_addr, cluster_xy );
185
186	// initializes the WTI interrupt vector entry for XCU
187	_schedulers[x][y][p]->wti_vector[wti_id] = isr_channel<<16 \| isr_type;
188
189	} // end ext_irq_alloc()
190
191	////////////////////////////////////////////
192	void _ext_irq_release( unsigned int isr_type,
193	unsigned int isr_channel,
194	unsigned int wti_index )
195	{
196	unsigned int irq_id; // external IRQ index in PIC (input)
197
198	// get processor coordinates [x,y,p]
199	unsigned int gpid = _get_procid();
200	unsigned int cluster_xy = gpid >> P_WIDTH;
201	unsigned int x = cluster_xy >> Y_WIDTH;
202	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
203	unsigned int p = gpid & ((1<<P_WIDTH)-1);
204
205	// check arguments
206	if ( isr_type >= GIET_ISR_TYPE_MAX )
207	{
208	_printf("\n[GIET ERROR] in _ext_irq_release() illegal ISR type\n");
209	_exit();
210	}
211	if ( isr_channel >= GIET_ISR_CHANNEL_MAX )
212	{
213	_printf("\n[GIET ERROR] in _ext_irq_release() : illegal ISR channel\n");
214	_exit();
215	}
216
217	// desactivates dynamically allocated PIC entry
218	irq_id = _ext_irq_index[isr_type][isr_channel];
219	_pic_set_register( irq_id , IOPIC_MASK , 0 );
220
221	// releases dynamically allocated WTI mailbox
222	if ( wti_index == p + NB_PROCS_MAX ) _wti_alloc_one[x][y][p] = 0;
223	else if ( wti_index == p + 2*NB_PROCS_MAX ) _wti_alloc_two[x][y][p] = 0;
224	else if ( wti_index == p + 3*NB_PROCS_MAX ) _wti_alloc_ter[x][y][p] = 0;
225	else
226	{
227	_printf("\n[GIET ERROR] in _ext_irq_release() : illegal WTI index\n");
228	_exit();
229	}
230	} // end ext_irq_release()
231
232	/////////////////
233	void _irq_demux()
234	{
235	unsigned int gpid = _get_procid();
236	unsigned int cluster_xy = gpid >> P_WIDTH;
237	unsigned int x = cluster_xy >> Y_WIDTH;
238	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
239	unsigned int lpid = gpid & ((1<<P_WIDTH)-1);
240	unsigned int irq_id;
241	unsigned int irq_type;
242
243	// get the highest priority active IRQ index
244	unsigned int icu_out_index = lpid * IRQ_PER_PROCESSOR;
245
246	_xcu_get_index( cluster_xy, icu_out_index, &irq_id, &irq_type );
247
248	if (irq_id < 32)
249	{
250	static_scheduler_t* psched = (static_scheduler_t*)_get_sched();
251	unsigned int entry = 0;
252	unsigned int isr_type;
253	unsigned int channel;
254
255	if (irq_type == IRQ_TYPE_HWI) entry = psched->hwi_vector[irq_id];
256	else if (irq_type == IRQ_TYPE_PTI) entry = psched->pti_vector[irq_id];
257	else if (irq_type == IRQ_TYPE_WTI) entry = psched->wti_vector[irq_id];
258	else
259	{
260	_printf("\n[GIET ERROR] illegal irq_type in irq_demux()\n");
261	_exit();
262	}
263
264	isr_type = (entry ) & 0x0000FFFF;
265	channel = (entry>>16) & 0x00007FFF;
266
267	#if GIET_DEBUG_IRQS // we don't take the TTY lock to avoid deadlocks
268	char* irq_type_str[] = { "HWI", "WTI", "PTI" };
269	_puts("\n[IRQS DEBUG] Processor[");
270	_putd(x);
271	_puts(",");
272	_putd(y);
273	_puts(",");
274	_putd(lpid);
275	_puts("] enters _irq_demux() at cycle ");
276	_putd(_get_proctime() );
277	_puts("\n ");
278	_puts(irq_type_str[irq_type] );
279	_puts(" : irq_id = ");
280	_putd(irq_id);
281	_puts(" / isr_type = ");
282	_putd(isr_type);
283	_puts(" / channel = ");
284	_putd(channel);
285	_puts("\n");
286	#endif
287
288	// ISR call
289	if ( isr_type == ISR_TICK ) _isr_tick ( irq_type, irq_id, channel );
290	else if ( isr_type == ISR_WAKUP ) _isr_wakup ( irq_type, irq_id, channel );
291	else if ( isr_type == ISR_BDV ) _bdv_isr ( irq_type, irq_id, channel );
292	else if ( isr_type == ISR_CMA ) _cma_isr ( irq_type, irq_id, channel );
293	else if ( isr_type == ISR_TTY_RX ) _tty_rx_isr ( irq_type, irq_id, channel );
294	else if ( isr_type == ISR_TTY_TX ) _tty_tx_isr ( irq_type, irq_id, channel );
295	else if ( isr_type == ISR_NIC_RX ) _nic_rx_isr ( irq_type, irq_id, channel );
296	else if ( isr_type == ISR_NIC_TX ) _nic_tx_isr ( irq_type, irq_id, channel );
297	else if ( isr_type == ISR_TIMER ) _timer_isr ( irq_type, irq_id, channel );
298	else if ( isr_type == ISR_MMC ) _mmc_isr ( irq_type, irq_id, channel );
299	else if ( isr_type == ISR_DMA ) _dma_isr ( irq_type, irq_id, channel );
300	else if ( isr_type == ISR_SPI ) _spi_isr ( irq_type, irq_id, channel );
301	else if ( isr_type == ISR_MWR ) _mwr_isr ( irq_type, irq_id, channel );
302	else
303	{
304	_printf("\n[GIET ERROR] in _irq_demux() :"
305	" illegal ISR type on processor[%d,%d,%d] at cycle %d\n"
306	" - irq_type = %d\n"
307	" - irq_id = %d\n"
308	" - isr_type = %x\n",
309	x, y, lpid, _get_proctime(), irq_type, irq_id, isr_type );
310	}
311	}
312	else // no interrupt active
313	{
314	_isr_default();
315	}
316	}
317
318	///////////////////
319	void _isr_default()
320	{
321	unsigned int gpid = _get_procid();
322	unsigned int cluster_xy = gpid >> P_WIDTH;
323	unsigned int x = cluster_xy >> Y_WIDTH;
324	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
325	unsigned int lpid = gpid & ((1<<P_WIDTH)-1);
326
327	_printf("\n[GIET WARNING] IRQ handler called but no active IRQ "
328	"on processor[%d,%d,%d] at cycle %d\n",
329	x, y, lpid, _get_proctime() );
330	}
331
332
333	////////////////////////////////////////////////////////////
334	void _isr_wakup( unsigned int irq_type, // HWI / WTI / PTI
335	unsigned int irq_id, // index returned by ICU
336	unsigned int channel ) // unused
337	{
338	unsigned int gpid = _get_procid();
339	unsigned int cluster_xy = gpid >> P_WIDTH;
340	unsigned int x = cluster_xy >> Y_WIDTH;
341	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
342	unsigned int p = gpid & ((1<<P_WIDTH)-1);
343
344	unsigned int value; // WTI mailbox value
345	unsigned int save_sr; // save SR value in pre-empted task stack
346
347	unsigned int ltid = _get_current_task_id();
348
349	if ( irq_type != IRQ_TYPE_WTI )
350	{
351	_printf("[GIET ERROR] P[%d,%d,%d] enters _isr_wakup() at cycle %d\n"
352	" but not called by a WTI interrupt\n",
353	x , y , p , _get_proctime() );
354	_exit();
355	}
356
357	// get mailbox value and acknowledge WTI
358	_xcu_get_wti_value( cluster_xy, irq_id, &value );
359
360	#if GIET_DEBUG_SWITCH
361	_printf("\n[DEBUG SWITCH] P[%d,%d,%d] enters _isr_wakup() at cycle %d\n"
362	" WTI index = %d / current ltid = %d / mailbox value = %x\n",
363	x , y , p , _get_proctime() , irq_id , ltid , value );
364	#endif
365
366	// enter critical section and swich context (if required)
367	if ( (ltid == IDLE_TASK_INDEX) \|\| (value != 0) )
368	{
369	_it_disable( &save_sr );
370	_ctx_switch();
371	_it_restore( &save_sr );
372	}
373
374	} // end _isr_wakup
375
376	///////////////////////////////////////////////////////////
377	void _isr_tick( unsigned int irq_type, // HWI / WTI / PTI
378	unsigned int irq_id, // index returned by ICU
379	unsigned int channel ) // channel index if HWI
380	{
381	unsigned int gpid = _get_procid();
382	unsigned int cluster_xy = gpid >> P_WIDTH;
383	unsigned int x = cluster_xy >> Y_WIDTH;
384	unsigned int y = cluster_xy & ((1<<Y_WIDTH)-1);
385	unsigned int p = gpid & ((1<<P_WIDTH)-1);
386
387	unsigned int save_sr; // save SR value in pre-empted task stack
388
389	if ( irq_type != IRQ_TYPE_PTI )
390	{
391	_printf("[GIET ERROR] P[%d,%d,%d] enters _isr_tick() at cycle %d\n"
392	" but not called by a PTI interrupt\n",
393	x , y , p , _get_proctime() );
394	_exit();
395	}
396
397	// acknowledge PTI
398	_xcu_timer_reset_irq( cluster_xy, irq_id );
399
400	#if GIET_DEBUG_SWITCH
401	unsigned int ltid = _get_current_task_id();
402	_printf("\n[DEBUG SWITCH] P[%d,%d,%d] enters _isr_tick() at cycle %d\n"
403	" WTI index = %d / current ltid = %d\n",
404	x , y , p , _get_proctime() , irq_id , ltid );
405	#endif
406
407	// enter critical section and switch context
408	_it_disable( &save_sr );
409	_ctx_switch();
410	_it_restore( &save_sr );
411
412	} // end _isr_tick
413
414
415	// Local Variables:
416	// tab-width: 4
417	// c-basic-offset: 4
418	// c-file-offsets:((innamespace . 0)(inline-open . 0))
419	// indent-tabs-mode: nil
420	// End:
421	// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
422

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