source: mainline/arch/ia32/src/smp/apic.c@ b0bf501

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since b0bf501 was b0bf501, checked in by Jakub Jermar <jakub@…>, 20 years ago

Define two placeholder functions for atomic_inc and atomic_dec on IA-64.

Add Ondrej Palkovsky to doc/AUTHORS.

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