source: mainline/arch/ia32/src/smp/apic.c@ 18e0a6c

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 18e0a6c was 18e0a6c, checked in by Jakub Jermar <jakub@…>, 20 years ago

Implement several assembler functions in gcc's asm notation instead of in .s or .S file.
Gain both better speed and size.
  • Property mode set to 100644
File size: 10.1 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 <arch/interrupt.h>
36#include <print.h>
37#include <arch/asm.h>
38#include <arch.h>
39
40#ifdef __SMP__
41
42/*
43 * This is functional, far-from-general-enough interface to the APIC.
44 * Advanced Programmable Interrupt Controller for MP systems.
45 * Tested on:
46 * Bochs 2.0.2 - Bochs 2.2 with 2-8 CPUs
47 * Simics 2.0.28
48 * ASUS P/I-P65UP5 + ASUS C-P55T2D REV. 1.41 with 2x 200Mhz Pentium CPUs
49 */
50
51/*
52 * These variables either stay configured as initilalized, or are changed by
53 * the MP configuration code.
54 *
55 * Pay special attention to the volatile keyword. Without it, gcc -O2 would
56 * optimize the code too much and accesses to l_apic and io_apic, that must
57 * always be 32-bit, would use byte oriented instructions.
58 */
59volatile __u32 *l_apic = (__u32 *) 0xfee00000;
60volatile __u32 *io_apic = (__u32 *) 0xfec00000;
61
62__u32 apic_id_mask = 0;
63
64int apic_poll_errors(void);
65
66void apic_init(void)
67{
68 __u32 tmp, id, i;
69
70 trap_register(VECTOR_APIC_SPUR, apic_spurious);
71
72 enable_irqs_function = io_apic_enable_irqs;
73 disable_irqs_function = io_apic_disable_irqs;
74 eoi_function = l_apic_eoi;
75
76 /*
77 * Configure interrupt routing.
78 * IRQ 0 remains masked as the time signal is generated by l_apic's themselves.
79 * Other interrupts will be forwarded to the lowest priority CPU.
80 */
81 io_apic_disable_irqs(0xffff);
82 trap_register(VECTOR_CLK, l_apic_timer_interrupt);
83 for (i=1; i<16; i++) {
84 int pin;
85
86 if ((pin = mps_irq_to_pin(i)) != -1)
87 io_apic_change_ioredtbl(pin,0xf,IVT_IRQBASE+i,LOPRI);
88 }
89
90
91 /*
92 * Ensure that io_apic has unique ID.
93 */
94 tmp = io_apic_read(IOAPICID);
95 id = (tmp >> 24) & 0xf;
96 if ((1<<id) & apic_id_mask) {
97 int i;
98
99 for (i=0; i<15; i++) {
100 if (!((1<<i) & apic_id_mask)) {
101 io_apic_write(IOAPICID, (tmp & (~(0xf<<24))) | (i<<24));
102 break;
103 }
104 }
105 }
106
107 /*
108 * Configure the BSP's lapic.
109 */
110 l_apic_init();
111 l_apic_debug();
112}
113
114void apic_spurious(__u8 n, __u32 stack[])
115{
116 printf("cpu%d: APIC spurious interrupt\n", CPU->id);
117}
118
119int apic_poll_errors(void)
120{
121 __u32 esr;
122
123 esr = l_apic[ESR] & ~ESRClear;
124
125 if ((esr>>0) & 1)
126 printf("Send CS Error\n");
127 if ((esr>>1) & 1)
128 printf("Receive CS Error\n");
129 if ((esr>>2) & 1)
130 printf("Send Accept Error\n");
131 if ((esr>>3) & 1)
132 printf("Receive Accept Error\n");
133 if ((esr>>5) & 1)
134 printf("Send Illegal Vector\n");
135 if ((esr>>6) & 1)
136 printf("Received Illegal Vector\n");
137 if ((esr>>7) & 1)
138 printf("Illegal Register Address\n");
139
140 return !esr;
141}
142
143/*
144 * Send all CPUs excluding CPU IPI vector.
145 */
146int l_apic_broadcast_custom_ipi(__u8 vector)
147{
148 __u32 lo;
149
150 /*
151 * Read the ICR register in and zero all non-reserved fields.
152 */
153 lo = l_apic[ICRlo] & ICRloClear;
154
155 lo |= DLVRMODE_FIXED | DESTMODE_LOGIC | LEVEL_ASSERT | SHORTHAND_EXCL | TRGRMODE_LEVEL | vector;
156
157 l_apic[ICRlo] = lo;
158
159 lo = l_apic[ICRlo] & ICRloClear;
160 if (lo & SEND_PENDING)
161 printf("IPI is pending.\n");
162
163 return apic_poll_errors();
164}
165
166/*
167 * Universal Start-up Algorithm for bringing up the AP processors.
168 */
169int l_apic_send_init_ipi(__u8 apicid)
170{
171 __u32 lo, hi;
172 int i;
173
174 /*
175 * Read the ICR register in and zero all non-reserved fields.
176 */
177 lo = l_apic[ICRlo] & ICRloClear;
178 hi = l_apic[ICRhi] & ICRhiClear;
179
180 lo |= DLVRMODE_INIT | DESTMODE_PHYS | LEVEL_ASSERT | SHORTHAND_DEST | TRGRMODE_LEVEL;
181 hi |= apicid << 24;
182
183 l_apic[ICRhi] = hi;
184 l_apic[ICRlo] = lo;
185
186 /*
187 * According to MP Specification, 20us should be enough to
188 * deliver the IPI.
189 */
190 delay(20);
191
192 if (!apic_poll_errors()) return 0;
193
194 lo = l_apic[ICRlo] & ICRloClear;
195 if (lo & SEND_PENDING)
196 printf("IPI is pending.\n");
197
198 l_apic[ICRlo] = lo | DLVRMODE_INIT | DESTMODE_PHYS | LEVEL_DEASSERT | SHORTHAND_DEST | TRGRMODE_LEVEL;
199
200 /*
201 * Wait 10ms as MP Specification specifies.
202 */
203 delay(10000);
204
205 if (!is_82489DX_apic(l_apic[LAVR])) {
206 /*
207 * If this is not 82489DX-based l_apic we must send two STARTUP IPI's.
208 */
209 for (i = 0; i<2; i++) {
210 lo = l_apic[ICRlo] & ICRloClear;
211 lo |= ((__address) ap_boot) / 4096; /* calculate the reset vector */
212 l_apic[ICRlo] = lo | DLVRMODE_STUP | DESTMODE_PHYS | LEVEL_ASSERT | SHORTHAND_DEST | TRGRMODE_LEVEL;
213 delay(200);
214 }
215 }
216
217
218 return apic_poll_errors();
219}
220
221void l_apic_init(void)
222{
223 __u32 tmp, t1, t2;
224
225 l_apic[LVT_Err] |= (1<<16);
226 l_apic[LVT_LINT0] |= (1<<16);
227 l_apic[LVT_LINT1] |= (1<<16);
228
229 tmp = l_apic[SVR] & SVRClear;
230 l_apic[SVR] = tmp | (1<<8) | (VECTOR_APIC_SPUR);
231
232 l_apic[TPR] &= TPRClear;
233
234 if (CPU->arch.family >= 6)
235 enable_l_apic_in_msr();
236
237 tmp = l_apic[ICRlo] & ICRloClear;
238 l_apic[ICRlo] = tmp | DLVRMODE_INIT | DESTMODE_PHYS | LEVEL_DEASSERT | SHORTHAND_INCL | TRGRMODE_LEVEL;
239
240 /*
241 * Program the timer for periodic mode and respective vector.
242 */
243
244 l_apic[TDCR] &= TDCRClear;
245 l_apic[TDCR] |= 0xb;
246 tmp = l_apic[LVT_Tm] | (1<<17) | (VECTOR_CLK);
247 l_apic[LVT_Tm] = tmp & ~(1<<16);
248
249 t1 = l_apic[CCRT];
250 l_apic[ICRT] = 0xffffffff;
251
252 while (l_apic[CCRT] == t1)
253 ;
254
255 t1 = l_apic[CCRT];
256 delay(1000);
257 t2 = l_apic[CCRT];
258
259 l_apic[ICRT] = t1-t2;
260
261}
262
263void l_apic_eoi(void)
264{
265 l_apic[EOI] = 0;
266}
267
268void l_apic_debug(void)
269{
270#ifdef LAPIC_VERBOSE
271 int i, lint;
272
273 printf("LVT on cpu%d, LAPIC ID: %d\n", CPU->id, l_apic_id());
274
275 printf("LVT_Tm: ");
276 if (l_apic[LVT_Tm] & (1<<17)) printf("periodic"); else printf("one-shot"); putchar(',');
277 if (l_apic[LVT_Tm] & (1<<16)) printf("masked"); else printf("not masked"); putchar(',');
278 if (l_apic[LVT_Tm] & (1<<12)) printf("send pending"); else printf("idle"); putchar(',');
279 printf("%B\n", l_apic[LVT_Tm] & 0xff);
280
281 for (i=0; i<2; i++) {
282 lint = i ? LVT_LINT1 : LVT_LINT0;
283 printf("LVT_LINT%d: ", i);
284 if (l_apic[lint] & (1<<16)) printf("masked"); else printf("not masked"); putchar(',');
285 if (l_apic[lint] & (1<<15)) printf("level"); else printf("edge"); putchar(',');
286 printf("%d", l_apic[lint] & (1<<14)); putchar(',');
287 printf("%d", l_apic[lint] & (1<<13)); putchar(',');
288 if (l_apic[lint] & (1<<12)) printf("send pending"); else printf("idle"); putchar(',');
289
290 switch ((l_apic[lint]>>8)&7) {
291 case 0: printf("fixed"); break;
292 case 4: printf("NMI"); break;
293 case 7: printf("ExtINT"); break;
294 }
295 putchar(',');
296 printf("%B\n", l_apic[lint] & 0xff);
297 }
298
299 printf("LVT_Err: ");
300 if (l_apic[LVT_Err] & (1<<16)) printf("masked"); else printf("not masked"); putchar(',');
301 if (l_apic[LVT_Err] & (1<<12)) printf("send pending"); else printf("idle"); putchar(',');
302 printf("%B\n", l_apic[LVT_Err] & 0xff);
303
304 /*
305 * This register is supported only on P6 and higher.
306 */
307 if (CPU->arch.family > 5) {
308 printf("LVT_PCINT: ");
309 if (l_apic[LVT_PCINT] & (1<<16)) printf("masked"); else printf("not masked"); putchar(',');
310 if (l_apic[LVT_PCINT] & (1<<12)) printf("send pending"); else printf("idle"); putchar(',');
311 switch ((l_apic[LVT_PCINT] >> 8)&7) {
312 case 0: printf("fixed"); break;
313 case 4: printf("NMI"); break;
314 case 7: printf("ExtINT"); break;
315 }
316 putchar(',');
317 printf("%B\n", l_apic[LVT_PCINT] & 0xff);
318 }
319#endif
320}
321
322void l_apic_timer_interrupt(__u8 n, __u32 stack[])
323{
324 l_apic_eoi();
325 clock();
326}
327
328__u8 l_apic_id(void)
329{
330 return (l_apic[L_APIC_ID] >> L_APIC_IDShift)&L_APIC_IDMask;
331}
332
333__u32 io_apic_read(__u8 address)
334{
335 __u32 tmp;
336
337 tmp = io_apic[IOREGSEL] & ~0xf;
338 io_apic[IOREGSEL] = tmp | address;
339 return io_apic[IOWIN];
340}
341
342void io_apic_write(__u8 address, __u32 x)
343{
344 __u32 tmp;
345
346 tmp = io_apic[IOREGSEL] & ~0xf;
347 io_apic[IOREGSEL] = tmp | address;
348 io_apic[IOWIN] = x;
349}
350
351void io_apic_change_ioredtbl(int signal, int dest, __u8 v, int flags)
352{
353 __u32 reglo, reghi;
354 int dlvr = 0;
355
356 if (flags & LOPRI)
357 dlvr = 1;
358
359 reglo = io_apic_read(IOREDTBL + signal*2);
360 reghi = io_apic_read(IOREDTBL + signal*2 + 1);
361
362 reghi &= ~0x0f000000;
363 reghi |= (dest<<24);
364
365 reglo &= (~0x1ffff) | (1<<16); /* don't touch the mask */
366 reglo |= (0<<15) | (0<<13) | (0<<11) | (dlvr<<8) | v;
367
368 io_apic_write(IOREDTBL + signal*2, reglo);
369 io_apic_write(IOREDTBL + signal*2 + 1, reghi);
370}
371
372void io_apic_disable_irqs(__u16 irqmask)
373{
374 int i,pin;
375 __u32 reglo;
376
377 for (i=0;i<16;i++) {
378 if ((irqmask>>i) & 1) {
379 /*
380 * Mask the signal input in IO APIC if there is a
381 * mapping for the respective IRQ number.
382 */
383 pin = mps_irq_to_pin(i);
384 if (pin != -1) {
385 reglo = io_apic_read(IOREDTBL + pin*2);
386 reglo |= (1<<16);
387 io_apic_write(IOREDTBL + pin*2,reglo);
388 }
389
390 }
391 }
392}
393
394void io_apic_enable_irqs(__u16 irqmask)
395{
396 int i,pin;
397 __u32 reglo;
398
399 for (i=0;i<16;i++) {
400 if ((irqmask>>i) & 1) {
401 /*
402 * Unmask the signal input in IO APIC if there is a
403 * mapping for the respective IRQ number.
404 */
405 pin = mps_irq_to_pin(i);
406 if (pin != -1) {
407 reglo = io_apic_read(IOREDTBL + pin*2);
408 reglo &= ~(1<<16);
409 io_apic_write(IOREDTBL + pin*2,reglo);
410 }
411
412 }
413 }
414
415}
416
417#endif /* __SMP__ */
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