source: mainline/arch/ia32/src/smp/apic.c@ 7910cff

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 7910cff was fcfac420, checked in by Ondrej Palkovsky <ondrap@…>, 20 years ago

Changed ia32 & amd64 to use exc_register instead of trap_register.

Fixed dependency list building. I hope you all have 'makedepend' installed,
if you don't it's time to install it, as CC -M builds the dependency
list without directory names..and it just does not work.
  • Property mode set to 100644
File size: 12.7 KB
Line 
1/*
2 * Copyright (C) 2001-2004 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <arch/types.h>
30#include <arch/smp/apic.h>
31#include <arch/smp/ap.h>
32#include <arch/smp/mps.h>
33#include <mm/page.h>
34#include <time/delay.h>
35#include <interrupt.h>
36#include <arch/interrupt.h>
37#include <print.h>
38#include <arch/asm.h>
39#include <arch.h>
40
41#ifdef CONFIG_SMP
42
43/*
44 * Advanced Programmable Interrupt Controller for SMP systems.
45 * Tested on:
46 * Bochs 2.0.2 - Bochs 2.2 with 2-8 CPUs
47 * Simics 2.0.28 - Simics 2.2.19 2-15 CPUs
48 * VMware Workstation 5.5 with 2 CPUs
49 * ASUS P/I-P65UP5 + ASUS C-P55T2D REV. 1.41 with 2x 200Mhz Pentium CPUs
50 * ASUS PCH-DL with 2x 3000Mhz Pentium 4 Xeon (HT) CPUs
51 * MSI K7D Master-L with 2x 2100MHz Athlon MP CPUs
52 */
53
54/*
55 * These variables either stay configured as initilalized, or are changed by
56 * the MP configuration code.
57 *
58 * Pay special attention to the volatile keyword. Without it, gcc -O2 would
59 * optimize the code too much and accesses to l_apic and io_apic, that must
60 * always be 32-bit, would use byte oriented instructions.
61 */
62volatile __u32 *l_apic = (__u32 *) 0xfee00000;
63volatile __u32 *io_apic = (__u32 *) 0xfec00000;
64
65__u32 apic_id_mask = 0;
66
67static int apic_poll_errors(void);
68
69#ifdef LAPIC_VERBOSE
70static char *delmod_str[] = {
71 "Fixed",
72 "Lowest Priority",
73 "SMI",
74 "Reserved",
75 "NMI",
76 "INIT",
77 "STARTUP",
78 "ExtInt"
79};
80
81static char *destmod_str[] = {
82 "Physical",
83 "Logical"
84};
85
86static char *trigmod_str[] = {
87 "Edge",
88 "Level"
89};
90
91static char *mask_str[] = {
92 "Unmasked",
93 "Masked"
94};
95
96static char *delivs_str[] = {
97 "Idle",
98 "Send Pending"
99};
100
101static char *tm_mode_str[] = {
102 "One-shot",
103 "Periodic"
104};
105
106static char *intpol_str[] = {
107 "Polarity High",
108 "Polarity Low"
109};
110#endif /* LAPIC_VERBOSE */
111
112
113static void apic_spurious(int n, void *stack);
114static void l_apic_timer_interrupt(int n, void *stack);
115
116/** Initialize APIC on BSP. */
117void apic_init(void)
118{
119 io_apic_id_t idreg;
120 int i;
121
122 exc_register(VECTOR_APIC_SPUR, "apic_spurious", apic_spurious);
123
124 enable_irqs_function = io_apic_enable_irqs;
125 disable_irqs_function = io_apic_disable_irqs;
126 eoi_function = l_apic_eoi;
127
128 /*
129 * Configure interrupt routing.
130 * IRQ 0 remains masked as the time signal is generated by l_apic's themselves.
131 * Other interrupts will be forwarded to the lowest priority CPU.
132 */
133 io_apic_disable_irqs(0xffff);
134 exc_register(VECTOR_CLK, "l_apic_timer", l_apic_timer_interrupt);
135 for (i = 0; i < IRQ_COUNT; i++) {
136 int pin;
137
138 if ((pin = smp_irq_to_pin(i)) != -1) {
139 io_apic_change_ioredtbl(pin, DEST_ALL, IVT_IRQBASE+i, LOPRI);
140 }
141 }
142
143 /*
144 * Ensure that io_apic has unique ID.
145 */
146 idreg.value = io_apic_read(IOAPICID);
147 if ((1<<idreg.apic_id) & apic_id_mask) { /* see if IO APIC ID is used already */
148 for (i = 0; i < APIC_ID_COUNT; i++) {
149 if (!((1<<i) & apic_id_mask)) {
150 idreg.apic_id = i;
151 io_apic_write(IOAPICID, idreg.value);
152 break;
153 }
154 }
155 }
156
157 /*
158 * Configure the BSP's lapic.
159 */
160 l_apic_init();
161
162 l_apic_debug();
163}
164
165/** APIC spurious interrupt handler.
166 *
167 * @param n Interrupt vector.
168 * @param stack Interrupted stack.
169 */
170void apic_spurious(int n, void *stack)
171{
172 printf("cpu%d: APIC spurious interrupt\n", CPU->id);
173}
174
175/** Poll for APIC errors.
176 *
177 * Examine Error Status Register and report all errors found.
178 *
179 * @return 0 on error, 1 on success.
180 */
181int apic_poll_errors(void)
182{
183 esr_t esr;
184
185 esr.value = l_apic[ESR];
186
187 if (esr.send_checksum_error)
188 printf("Send Checksum Error\n");
189 if (esr.receive_checksum_error)
190 printf("Receive Checksum Error\n");
191 if (esr.send_accept_error)
192 printf("Send Accept Error\n");
193 if (esr.receive_accept_error)
194 printf("Receive Accept Error\n");
195 if (esr.send_illegal_vector)
196 printf("Send Illegal Vector\n");
197 if (esr.received_illegal_vector)
198 printf("Received Illegal Vector\n");
199 if (esr.illegal_register_address)
200 printf("Illegal Register Address\n");
201
202 return !esr.err_bitmap;
203}
204
205/** Send all CPUs excluding CPU IPI vector.
206 *
207 * @param vector Interrupt vector to be sent.
208 *
209 * @return 0 on failure, 1 on success.
210 */
211int l_apic_broadcast_custom_ipi(__u8 vector)
212{
213 icr_t icr;
214
215 icr.lo = l_apic[ICRlo];
216 icr.delmod = DELMOD_FIXED;
217 icr.destmod = DESTMOD_LOGIC;
218 icr.level = LEVEL_ASSERT;
219 icr.shorthand = SHORTHAND_ALL_EXCL;
220 icr.trigger_mode = TRIGMOD_LEVEL;
221 icr.vector = vector;
222
223 l_apic[ICRlo] = icr.lo;
224
225 icr.lo = l_apic[ICRlo];
226 if (icr.delivs == DELIVS_PENDING)
227 printf("IPI is pending.\n");
228
229 return apic_poll_errors();
230}
231
232/** Universal Start-up Algorithm for bringing up the AP processors.
233 *
234 * @param apicid APIC ID of the processor to be brought up.
235 *
236 * @return 0 on failure, 1 on success.
237 */
238int l_apic_send_init_ipi(__u8 apicid)
239{
240 icr_t icr;
241 int i;
242
243 /*
244 * Read the ICR register in and zero all non-reserved fields.
245 */
246 icr.lo = l_apic[ICRlo];
247 icr.hi = l_apic[ICRhi];
248
249 icr.delmod = DELMOD_INIT;
250 icr.destmod = DESTMOD_PHYS;
251 icr.level = LEVEL_ASSERT;
252 icr.trigger_mode = TRIGMOD_LEVEL;
253 icr.shorthand = SHORTHAND_NONE;
254 icr.vector = 0;
255 icr.dest = apicid;
256
257 l_apic[ICRhi] = icr.hi;
258 l_apic[ICRlo] = icr.lo;
259
260 /*
261 * According to MP Specification, 20us should be enough to
262 * deliver the IPI.
263 */
264 delay(20);
265
266 if (!apic_poll_errors()) return 0;
267
268 icr.lo = l_apic[ICRlo];
269 if (icr.delivs == DELIVS_PENDING)
270 printf("IPI is pending.\n");
271
272 icr.delmod = DELMOD_INIT;
273 icr.destmod = DESTMOD_PHYS;
274 icr.level = LEVEL_DEASSERT;
275 icr.shorthand = SHORTHAND_NONE;
276 icr.trigger_mode = TRIGMOD_LEVEL;
277 icr.vector = 0;
278 l_apic[ICRlo] = icr.lo;
279
280 /*
281 * Wait 10ms as MP Specification specifies.
282 */
283 delay(10000);
284
285 if (!is_82489DX_apic(l_apic[LAVR])) {
286 /*
287 * If this is not 82489DX-based l_apic we must send two STARTUP IPI's.
288 */
289 for (i = 0; i<2; i++) {
290 icr.lo = l_apic[ICRlo];
291 icr.vector = ((__address) ap_boot) / 4096; /* calculate the reset vector */
292 icr.delmod = DELMOD_STARTUP;
293 icr.destmod = DESTMOD_PHYS;
294 icr.level = LEVEL_ASSERT;
295 icr.shorthand = SHORTHAND_NONE;
296 icr.trigger_mode = TRIGMOD_LEVEL;
297 l_apic[ICRlo] = icr.lo;
298 delay(200);
299 }
300 }
301
302 return apic_poll_errors();
303}
304
305/** Initialize Local APIC. */
306void l_apic_init(void)
307{
308 lvt_error_t error;
309 lvt_lint_t lint;
310 svr_t svr;
311 icr_t icr;
312 tdcr_t tdcr;
313 lvt_tm_t tm;
314 __u32 t1, t2;
315
316 /* Initialize LVT Error register. */
317 error.value = l_apic[LVT_Err];
318 error.masked = true;
319 l_apic[LVT_Err] = error.value;
320
321 /* Initialize LVT LINT0 register. */
322 lint.value = l_apic[LVT_LINT0];
323 lint.masked = true;
324 l_apic[LVT_LINT0] = lint.value;
325
326 /* Initialize LVT LINT1 register. */
327 lint.value = l_apic[LVT_LINT1];
328 lint.masked = true;
329 l_apic[LVT_LINT1] = lint.value;
330
331 /* Spurious-Interrupt Vector Register initialization. */
332 svr.value = l_apic[SVR];
333 svr.vector = VECTOR_APIC_SPUR;
334 svr.lapic_enabled = true;
335 l_apic[SVR] = svr.value;
336
337 l_apic[TPR] &= TPRClear;
338
339 if (CPU->arch.family >= 6)
340 enable_l_apic_in_msr();
341
342 /* Interrupt Command Register initialization. */
343 icr.lo = l_apic[ICRlo];
344 icr.delmod = DELMOD_INIT;
345 icr.destmod = DESTMOD_PHYS;
346 icr.level = LEVEL_DEASSERT;
347 icr.shorthand = SHORTHAND_ALL_INCL;
348 icr.trigger_mode = TRIGMOD_LEVEL;
349 l_apic[ICRlo] = icr.lo;
350
351 /* Timer Divide Configuration Register initialization. */
352 tdcr.value = l_apic[TDCR];
353 tdcr.div_value = DIVIDE_1;
354 l_apic[TDCR] = tdcr.value;
355
356 /* Program local timer. */
357 tm.value = l_apic[LVT_Tm];
358 tm.vector = VECTOR_CLK;
359 tm.mode = TIMER_PERIODIC;
360 tm.masked = false;
361 l_apic[LVT_Tm] = tm.value;
362
363 /* Measure and configure the timer to generate timer interrupt each ms. */
364 t1 = l_apic[CCRT];
365 l_apic[ICRT] = 0xffffffff;
366
367 while (l_apic[CCRT] == t1)
368 ;
369
370 t1 = l_apic[CCRT];
371 delay(1000);
372 t2 = l_apic[CCRT];
373
374 l_apic[ICRT] = t1-t2;
375}
376
377/** Local APIC End of Interrupt. */
378void l_apic_eoi(void)
379{
380 l_apic[EOI] = 0;
381}
382
383/** Dump content of Local APIC registers. */
384void l_apic_debug(void)
385{
386#ifdef LAPIC_VERBOSE
387 lvt_tm_t tm;
388 lvt_lint_t lint;
389 lvt_error_t error;
390
391 printf("LVT on cpu%d, LAPIC ID: %d\n", CPU->id, l_apic_id());
392
393 tm.value = l_apic[LVT_Tm];
394 printf("LVT Tm: vector=%B, %s, %s, %s\n", tm.vector, delivs_str[tm.delivs], mask_str[tm.masked], tm_mode_str[tm.mode]);
395 lint.value = l_apic[LVT_LINT0];
396 printf("LVT LINT0: vector=%B, %s, %s, %s, irr=%d, %s, %s\n", tm.vector, delmod_str[lint.delmod], delivs_str[lint.delivs], intpol_str[lint.intpol], lint.irr, trigmod_str[lint.trigger_mode], mask_str[lint.masked]);
397 lint.value = l_apic[LVT_LINT1];
398 printf("LVT LINT1: vector=%B, %s, %s, %s, irr=%d, %s, %s\n", tm.vector, delmod_str[lint.delmod], delivs_str[lint.delivs], intpol_str[lint.intpol], lint.irr, trigmod_str[lint.trigger_mode], mask_str[lint.masked]);
399 error.value = l_apic[LVT_Err];
400 printf("LVT Err: vector=%B, %s, %s\n", error.vector, delivs_str[error.delivs], mask_str[error.masked]);
401#endif
402}
403
404/** Local APIC Timer Interrupt.
405 *
406 * @param n Interrupt vector number.
407 * @param stack Interrupted stack.
408 */
409void l_apic_timer_interrupt(int n, void *stack)
410{
411 l_apic_eoi();
412 clock();
413}
414
415/** Get Local APIC ID.
416 *
417 * @return Local APIC ID.
418 */
419__u8 l_apic_id(void)
420{
421 l_apic_id_t idreg;
422
423 idreg.value = l_apic[L_APIC_ID];
424 return idreg.apic_id;
425}
426
427/** Read from IO APIC register.
428 *
429 * @param address IO APIC register address.
430 *
431 * @return Content of the addressed IO APIC register.
432 */
433__u32 io_apic_read(__u8 address)
434{
435 io_regsel_t regsel;
436
437 regsel.value = io_apic[IOREGSEL];
438 regsel.reg_addr = address;
439 io_apic[IOREGSEL] = regsel.value;
440 return io_apic[IOWIN];
441}
442
443/** Write to IO APIC register.
444 *
445 * @param address IO APIC register address.
446 * @param Content to be written to the addressed IO APIC register.
447 */
448void io_apic_write(__u8 address, __u32 x)
449{
450 io_regsel_t regsel;
451
452 regsel.value = io_apic[IOREGSEL];
453 regsel.reg_addr = address;
454 io_apic[IOREGSEL] = regsel.value;
455 io_apic[IOWIN] = x;
456}
457
458/** Change some attributes of one item in I/O Redirection Table.
459 *
460 * @param pin IO APIC pin number.
461 * @param dest Interrupt destination address.
462 * @param v Interrupt vector to trigger.
463 * @param flags Flags.
464 */
465void io_apic_change_ioredtbl(int pin, int dest, __u8 v, int flags)
466{
467 io_redirection_reg_t reg;
468 int dlvr = DELMOD_FIXED;
469
470 if (flags & LOPRI)
471 dlvr = DELMOD_LOWPRI;
472
473
474 reg.lo = io_apic_read(IOREDTBL + pin*2);
475 reg.hi = io_apic_read(IOREDTBL + pin*2 + 1);
476
477 reg.dest = dest;
478 reg.destmod = DESTMOD_LOGIC;
479 reg.trigger_mode = TRIGMOD_EDGE;
480 reg.intpol = POLARITY_HIGH;
481 reg.delmod = dlvr;
482 reg.intvec = v;
483
484 io_apic_write(IOREDTBL + pin*2, reg.lo);
485 io_apic_write(IOREDTBL + pin*2 + 1, reg.hi);
486}
487
488/** Mask IRQs in IO APIC.
489 *
490 * @param irqmask Bitmask of IRQs to be masked (0 = do not mask, 1 = mask).
491 */
492void io_apic_disable_irqs(__u16 irqmask)
493{
494 io_redirection_reg_t reg;
495 int i, pin;
496
497 for (i=0;i<16;i++) {
498 if (irqmask & (1<<i)) {
499 /*
500 * Mask the signal input in IO APIC if there is a
501 * mapping for the respective IRQ number.
502 */
503 pin = smp_irq_to_pin(i);
504 if (pin != -1) {
505 reg.lo = io_apic_read(IOREDTBL + pin*2);
506 reg.masked = true;
507 io_apic_write(IOREDTBL + pin*2, reg.lo);
508 }
509
510 }
511 }
512}
513
514/** Unmask IRQs in IO APIC.
515 *
516 * @param irqmask Bitmask of IRQs to be unmasked (0 = do not unmask, 1 = unmask).
517 */
518void io_apic_enable_irqs(__u16 irqmask)
519{
520 int i, pin;
521 io_redirection_reg_t reg;
522
523 for (i=0;i<16;i++) {
524 if (irqmask & (1<<i)) {
525 /*
526 * Unmask the signal input in IO APIC if there is a
527 * mapping for the respective IRQ number.
528 */
529 pin = smp_irq_to_pin(i);
530 if (pin != -1) {
531 reg.lo = io_apic_read(IOREDTBL + pin*2);
532 reg.masked = false;
533 io_apic_write(IOREDTBL + pin*2, reg.lo);
534 }
535
536 }
537 }
538}
539
540#endif /* CONFIG_SMP */
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