4 * Copyright (c) 2004-2005 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>
24 #include "qemu-timer.h"
25 #include "host-utils.h"
29 //#define DEBUG_COALESCING
32 #define DPRINTF(fmt, ...) \
33 do { printf("apic: " fmt , ## __VA_ARGS__); } while (0)
35 #define DPRINTF(fmt, ...)
38 #ifdef DEBUG_COALESCING
39 #define DPRINTF_C(fmt, ...) \
40 do { printf("apic: " fmt , ## __VA_ARGS__); } while (0)
42 #define DPRINTF_C(fmt, ...)
45 /* APIC Local Vector Table */
46 #define APIC_LVT_TIMER 0
47 #define APIC_LVT_THERMAL 1
48 #define APIC_LVT_PERFORM 2
49 #define APIC_LVT_LINT0 3
50 #define APIC_LVT_LINT1 4
51 #define APIC_LVT_ERROR 5
54 /* APIC delivery modes */
55 #define APIC_DM_FIXED 0
56 #define APIC_DM_LOWPRI 1
59 #define APIC_DM_INIT 5
60 #define APIC_DM_SIPI 6
61 #define APIC_DM_EXTINT 7
63 /* APIC destination mode */
64 #define APIC_DESTMODE_FLAT 0xf
65 #define APIC_DESTMODE_CLUSTER 1
67 #define APIC_TRIGGER_EDGE 0
68 #define APIC_TRIGGER_LEVEL 1
70 #define APIC_LVT_TIMER_PERIODIC (1<<17)
71 #define APIC_LVT_MASKED (1<<16)
72 #define APIC_LVT_LEVEL_TRIGGER (1<<15)
73 #define APIC_LVT_REMOTE_IRR (1<<14)
74 #define APIC_INPUT_POLARITY (1<<13)
75 #define APIC_SEND_PENDING (1<<12)
77 #define ESR_ILLEGAL_ADDRESS (1 << 7)
79 #define APIC_SV_ENABLE (1 << 8)
82 #define MAX_APIC_WORDS 8
84 /* Intel APIC constants: from include/asm/msidef.h */
85 #define MSI_DATA_VECTOR_SHIFT 0
86 #define MSI_DATA_VECTOR_MASK 0x000000ff
87 #define MSI_DATA_DELIVERY_MODE_SHIFT 8
88 #define MSI_DATA_TRIGGER_SHIFT 15
89 #define MSI_DATA_LEVEL_SHIFT 14
90 #define MSI_ADDR_DEST_MODE_SHIFT 2
91 #define MSI_ADDR_DEST_ID_SHIFT 12
92 #define MSI_ADDR_DEST_ID_MASK 0x00ffff0
94 #define MSI_ADDR_BASE 0xfee00000
95 #define MSI_ADDR_SIZE 0x100000
97 typedef struct APICState {
103 uint32_t spurious_vec;
106 uint32_t isr[8]; /* in service register */
107 uint32_t tmr[8]; /* trigger mode register */
108 uint32_t irr[8]; /* interrupt request register */
109 uint32_t lvt[APIC_LVT_NB];
110 uint32_t esr; /* error register */
113 uint32_t divide_conf;
115 uint32_t initial_count;
116 int64_t initial_count_load_time, next_time;
123 static int apic_io_memory;
124 static APICState *local_apics[MAX_APICS + 1];
125 static int last_apic_idx = 0;
126 static int apic_irq_delivered;
129 static void apic_set_irq(APICState *s, int vector_num, int trigger_mode);
130 static void apic_update_irq(APICState *s);
131 static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask,
132 uint8_t dest, uint8_t dest_mode);
134 /* Find first bit starting from msb */
135 static int fls_bit(uint32_t value)
137 return 31 - clz32(value);
140 /* Find first bit starting from lsb */
141 static int ffs_bit(uint32_t value)
146 static inline void set_bit(uint32_t *tab, int index)
150 mask = 1 << (index & 0x1f);
154 static inline void reset_bit(uint32_t *tab, int index)
158 mask = 1 << (index & 0x1f);
162 static inline int get_bit(uint32_t *tab, int index)
166 mask = 1 << (index & 0x1f);
167 return !!(tab[i] & mask);
170 static void apic_local_deliver(CPUState *env, int vector)
172 APICState *s = env->apic_state;
173 uint32_t lvt = s->lvt[vector];
176 DPRINTF("%s: vector %d delivery mode %d\n", __func__, vector,
178 if (lvt & APIC_LVT_MASKED)
181 switch ((lvt >> 8) & 7) {
183 cpu_interrupt(env, CPU_INTERRUPT_SMI);
187 cpu_interrupt(env, CPU_INTERRUPT_NMI);
191 cpu_interrupt(env, CPU_INTERRUPT_HARD);
195 trigger_mode = APIC_TRIGGER_EDGE;
196 if ((vector == APIC_LVT_LINT0 || vector == APIC_LVT_LINT1) &&
197 (lvt & APIC_LVT_LEVEL_TRIGGER))
198 trigger_mode = APIC_TRIGGER_LEVEL;
199 apic_set_irq(s, lvt & 0xff, trigger_mode);
203 void apic_deliver_pic_intr(CPUState *env, int level)
206 apic_local_deliver(env, APIC_LVT_LINT0);
208 APICState *s = env->apic_state;
209 uint32_t lvt = s->lvt[APIC_LVT_LINT0];
211 switch ((lvt >> 8) & 7) {
213 if (!(lvt & APIC_LVT_LEVEL_TRIGGER))
215 reset_bit(s->irr, lvt & 0xff);
218 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
224 #define foreach_apic(apic, deliver_bitmask, code) \
226 int __i, __j, __mask;\
227 for(__i = 0; __i < MAX_APIC_WORDS; __i++) {\
228 __mask = deliver_bitmask[__i];\
230 for(__j = 0; __j < 32; __j++) {\
231 if (__mask & (1 << __j)) {\
232 apic = local_apics[__i * 32 + __j];\
242 static void apic_bus_deliver(const uint32_t *deliver_bitmask,
243 uint8_t delivery_mode,
244 uint8_t vector_num, uint8_t polarity,
245 uint8_t trigger_mode)
247 APICState *apic_iter;
249 switch (delivery_mode) {
251 /* XXX: search for focus processor, arbitration */
255 for(i = 0; i < MAX_APIC_WORDS; i++) {
256 if (deliver_bitmask[i]) {
257 d = i * 32 + ffs_bit(deliver_bitmask[i]);
262 apic_iter = local_apics[d];
264 apic_set_irq(apic_iter, vector_num, trigger_mode);
274 foreach_apic(apic_iter, deliver_bitmask,
275 cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_SMI) );
279 foreach_apic(apic_iter, deliver_bitmask,
280 cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_NMI) );
284 /* normal INIT IPI sent to processors */
285 foreach_apic(apic_iter, deliver_bitmask,
286 cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_INIT) );
290 /* handled in I/O APIC code */
297 foreach_apic(apic_iter, deliver_bitmask,
298 apic_set_irq(apic_iter, vector_num, trigger_mode) );
301 void apic_deliver_irq(uint8_t dest, uint8_t dest_mode,
302 uint8_t delivery_mode, uint8_t vector_num,
303 uint8_t polarity, uint8_t trigger_mode)
305 uint32_t deliver_bitmask[MAX_APIC_WORDS];
307 DPRINTF("%s: dest %d dest_mode %d delivery_mode %d vector %d"
308 " polarity %d trigger_mode %d\n", __func__, dest, dest_mode,
309 delivery_mode, vector_num, polarity, trigger_mode);
310 apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
311 apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, polarity,
315 void cpu_set_apic_base(CPUState *env, uint64_t val)
317 APICState *s = env->apic_state;
319 DPRINTF("cpu_set_apic_base: %016" PRIx64 "\n", val);
322 s->apicbase = (val & 0xfffff000) |
323 (s->apicbase & (MSR_IA32_APICBASE_BSP | MSR_IA32_APICBASE_ENABLE));
324 /* if disabled, cannot be enabled again */
325 if (!(val & MSR_IA32_APICBASE_ENABLE)) {
326 s->apicbase &= ~MSR_IA32_APICBASE_ENABLE;
327 env->cpuid_features &= ~CPUID_APIC;
328 s->spurious_vec &= ~APIC_SV_ENABLE;
332 uint64_t cpu_get_apic_base(CPUState *env)
334 APICState *s = env->apic_state;
336 DPRINTF("cpu_get_apic_base: %016" PRIx64 "\n",
337 s ? (uint64_t)s->apicbase: 0);
338 return s ? s->apicbase : 0;
341 void cpu_set_apic_tpr(CPUX86State *env, uint8_t val)
343 APICState *s = env->apic_state;
346 s->tpr = (val & 0x0f) << 4;
350 uint8_t cpu_get_apic_tpr(CPUX86State *env)
352 APICState *s = env->apic_state;
353 return s ? s->tpr >> 4 : 0;
356 /* return -1 if no bit is set */
357 static int get_highest_priority_int(uint32_t *tab)
360 for(i = 7; i >= 0; i--) {
362 return i * 32 + fls_bit(tab[i]);
368 static int apic_get_ppr(APICState *s)
373 isrv = get_highest_priority_int(s->isr);
384 static int apic_get_arb_pri(APICState *s)
386 /* XXX: arbitration */
390 /* signal the CPU if an irq is pending */
391 static void apic_update_irq(APICState *s)
394 if (!(s->spurious_vec & APIC_SV_ENABLE))
396 irrv = get_highest_priority_int(s->irr);
399 ppr = apic_get_ppr(s);
400 if (ppr && (irrv & 0xf0) <= (ppr & 0xf0))
402 cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
405 void apic_reset_irq_delivered(void)
407 DPRINTF_C("%s: old coalescing %d\n", __func__, apic_irq_delivered);
408 apic_irq_delivered = 0;
411 int apic_get_irq_delivered(void)
413 DPRINTF_C("%s: returning coalescing %d\n", __func__, apic_irq_delivered);
414 return apic_irq_delivered;
417 static void apic_set_irq(APICState *s, int vector_num, int trigger_mode)
419 apic_irq_delivered += !get_bit(s->irr, vector_num);
420 DPRINTF_C("%s: coalescing %d\n", __func__, apic_irq_delivered);
422 set_bit(s->irr, vector_num);
424 set_bit(s->tmr, vector_num);
426 reset_bit(s->tmr, vector_num);
430 static void apic_eoi(APICState *s)
433 isrv = get_highest_priority_int(s->isr);
436 reset_bit(s->isr, isrv);
437 /* XXX: send the EOI packet to the APIC bus to allow the I/O APIC to
438 set the remote IRR bit for level triggered interrupts. */
442 static int apic_find_dest(uint8_t dest)
444 APICState *apic = local_apics[dest];
447 if (apic && apic->id == dest)
448 return dest; /* shortcut in case apic->id == apic->idx */
450 for (i = 0; i < MAX_APICS; i++) {
451 apic = local_apics[i];
452 if (apic && apic->id == dest)
459 static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask,
460 uint8_t dest, uint8_t dest_mode)
462 APICState *apic_iter;
465 if (dest_mode == 0) {
467 memset(deliver_bitmask, 0xff, MAX_APIC_WORDS * sizeof(uint32_t));
469 int idx = apic_find_dest(dest);
470 memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
472 set_bit(deliver_bitmask, idx);
475 /* XXX: cluster mode */
476 memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
477 for(i = 0; i < MAX_APICS; i++) {
478 apic_iter = local_apics[i];
480 if (apic_iter->dest_mode == 0xf) {
481 if (dest & apic_iter->log_dest)
482 set_bit(deliver_bitmask, i);
483 } else if (apic_iter->dest_mode == 0x0) {
484 if ((dest & 0xf0) == (apic_iter->log_dest & 0xf0) &&
485 (dest & apic_iter->log_dest & 0x0f)) {
486 set_bit(deliver_bitmask, i);
495 void apic_init_reset(CPUState *env)
497 APICState *s = env->apic_state;
504 s->spurious_vec = 0xff;
507 memset(s->isr, 0, sizeof(s->isr));
508 memset(s->tmr, 0, sizeof(s->tmr));
509 memset(s->irr, 0, sizeof(s->irr));
510 for(i = 0; i < APIC_LVT_NB; i++)
511 s->lvt[i] = 1 << 16; /* mask LVT */
513 memset(s->icr, 0, sizeof(s->icr));
516 s->initial_count = 0;
517 s->initial_count_load_time = 0;
519 s->wait_for_sipi = 1;
521 env->halted = !(s->apicbase & MSR_IA32_APICBASE_BSP);
524 static void apic_startup(APICState *s, int vector_num)
526 s->sipi_vector = vector_num;
527 cpu_interrupt(s->cpu_env, CPU_INTERRUPT_SIPI);
530 void apic_sipi(CPUState *env)
532 APICState *s = env->apic_state;
534 cpu_reset_interrupt(env, CPU_INTERRUPT_SIPI);
536 if (!s->wait_for_sipi)
540 cpu_x86_load_seg_cache(env, R_CS, s->sipi_vector << 8, s->sipi_vector << 12,
541 env->segs[R_CS].limit, env->segs[R_CS].flags);
543 s->wait_for_sipi = 0;
546 static void apic_deliver(APICState *s, uint8_t dest, uint8_t dest_mode,
547 uint8_t delivery_mode, uint8_t vector_num,
548 uint8_t polarity, uint8_t trigger_mode)
550 uint32_t deliver_bitmask[MAX_APIC_WORDS];
551 int dest_shorthand = (s->icr[0] >> 18) & 3;
552 APICState *apic_iter;
554 switch (dest_shorthand) {
556 apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
559 memset(deliver_bitmask, 0x00, sizeof(deliver_bitmask));
560 set_bit(deliver_bitmask, s->idx);
563 memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
566 memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
567 reset_bit(deliver_bitmask, s->idx);
571 switch (delivery_mode) {
574 int trig_mode = (s->icr[0] >> 15) & 1;
575 int level = (s->icr[0] >> 14) & 1;
576 if (level == 0 && trig_mode == 1) {
577 foreach_apic(apic_iter, deliver_bitmask,
578 apic_iter->arb_id = apic_iter->id );
585 foreach_apic(apic_iter, deliver_bitmask,
586 apic_startup(apic_iter, vector_num) );
590 apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, polarity,
594 int apic_get_interrupt(CPUState *env)
596 APICState *s = env->apic_state;
599 /* if the APIC is installed or enabled, we let the 8259 handle the
603 if (!(s->spurious_vec & APIC_SV_ENABLE))
606 /* XXX: spurious IRQ handling */
607 intno = get_highest_priority_int(s->irr);
610 if (s->tpr && intno <= s->tpr)
611 return s->spurious_vec & 0xff;
612 reset_bit(s->irr, intno);
613 set_bit(s->isr, intno);
618 int apic_accept_pic_intr(CPUState *env)
620 APICState *s = env->apic_state;
626 lvt0 = s->lvt[APIC_LVT_LINT0];
628 if ((s->apicbase & MSR_IA32_APICBASE_ENABLE) == 0 ||
629 (lvt0 & APIC_LVT_MASKED) == 0)
635 static uint32_t apic_get_current_count(APICState *s)
639 d = (qemu_get_clock(vm_clock) - s->initial_count_load_time) >>
641 if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
643 val = s->initial_count - (d % ((uint64_t)s->initial_count + 1));
645 if (d >= s->initial_count)
648 val = s->initial_count - d;
653 static void apic_timer_update(APICState *s, int64_t current_time)
655 int64_t next_time, d;
657 if (!(s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED)) {
658 d = (current_time - s->initial_count_load_time) >>
660 if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
661 if (!s->initial_count)
663 d = ((d / ((uint64_t)s->initial_count + 1)) + 1) * ((uint64_t)s->initial_count + 1);
665 if (d >= s->initial_count)
667 d = (uint64_t)s->initial_count + 1;
669 next_time = s->initial_count_load_time + (d << s->count_shift);
670 qemu_mod_timer(s->timer, next_time);
671 s->next_time = next_time;
674 qemu_del_timer(s->timer);
678 static void apic_timer(void *opaque)
680 APICState *s = opaque;
682 apic_local_deliver(s->cpu_env, APIC_LVT_TIMER);
683 apic_timer_update(s, s->next_time);
686 static uint32_t apic_mem_readb(void *opaque, target_phys_addr_t addr)
691 static uint32_t apic_mem_readw(void *opaque, target_phys_addr_t addr)
696 static void apic_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
700 static void apic_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
704 static uint32_t apic_mem_readl(void *opaque, target_phys_addr_t addr)
711 env = cpu_single_env;
716 index = (addr >> 4) & 0xff;
721 case 0x03: /* version */
722 val = 0x11 | ((APIC_LVT_NB - 1) << 16); /* version 0x11 */
728 val = apic_get_arb_pri(s);
732 val = apic_get_ppr(s);
738 val = s->log_dest << 24;
741 val = s->dest_mode << 28;
744 val = s->spurious_vec;
747 val = s->isr[index & 7];
750 val = s->tmr[index & 7];
753 val = s->irr[index & 7];
760 val = s->icr[index & 1];
763 val = s->lvt[index - 0x32];
766 val = s->initial_count;
769 val = apic_get_current_count(s);
772 val = s->divide_conf;
775 s->esr |= ESR_ILLEGAL_ADDRESS;
779 DPRINTF("read: " TARGET_FMT_plx " = %08x\n", addr, val);
783 static void apic_send_msi(target_phys_addr_t addr, uint32 data)
785 uint8_t dest = (addr & MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
786 uint8_t vector = (data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
787 uint8_t dest_mode = (addr >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
788 uint8_t trigger_mode = (data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
789 uint8_t delivery = (data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
790 /* XXX: Ignore redirection hint. */
791 apic_deliver_irq(dest, dest_mode, delivery, vector, 0, trigger_mode);
794 static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
798 int index = (addr >> 4) & 0xff;
799 if (addr > 0xfff || !index) {
800 /* MSI and MMIO APIC are at the same memory location,
801 * but actually not on the global bus: MSI is on PCI bus
802 * APIC is connected directly to the CPU.
803 * Mapping them on the global bus happens to work because
804 * MSI registers are reserved in APIC MMIO and vice versa. */
805 apic_send_msi(addr, val);
809 env = cpu_single_env;
814 DPRINTF("write: " TARGET_FMT_plx " = %08x\n", addr, val);
833 s->log_dest = val >> 24;
836 s->dest_mode = val >> 28;
839 s->spurious_vec = val & 0x1ff;
849 apic_deliver(s, (s->icr[1] >> 24) & 0xff, (s->icr[0] >> 11) & 1,
850 (s->icr[0] >> 8) & 7, (s->icr[0] & 0xff),
851 (s->icr[0] >> 14) & 1, (s->icr[0] >> 15) & 1);
858 int n = index - 0x32;
860 if (n == APIC_LVT_TIMER)
861 apic_timer_update(s, qemu_get_clock(vm_clock));
865 s->initial_count = val;
866 s->initial_count_load_time = qemu_get_clock(vm_clock);
867 apic_timer_update(s, s->initial_count_load_time);
874 s->divide_conf = val & 0xb;
875 v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);
876 s->count_shift = (v + 1) & 7;
880 s->esr |= ESR_ILLEGAL_ADDRESS;
885 /* This function is only used for old state version 1 and 2 */
886 static int apic_load_old(QEMUFile *f, void *opaque, int version_id)
888 APICState *s = opaque;
894 /* XXX: what if the base changes? (registered memory regions) */
895 qemu_get_be32s(f, &s->apicbase);
896 qemu_get_8s(f, &s->id);
897 qemu_get_8s(f, &s->arb_id);
898 qemu_get_8s(f, &s->tpr);
899 qemu_get_be32s(f, &s->spurious_vec);
900 qemu_get_8s(f, &s->log_dest);
901 qemu_get_8s(f, &s->dest_mode);
902 for (i = 0; i < 8; i++) {
903 qemu_get_be32s(f, &s->isr[i]);
904 qemu_get_be32s(f, &s->tmr[i]);
905 qemu_get_be32s(f, &s->irr[i]);
907 for (i = 0; i < APIC_LVT_NB; i++) {
908 qemu_get_be32s(f, &s->lvt[i]);
910 qemu_get_be32s(f, &s->esr);
911 qemu_get_be32s(f, &s->icr[0]);
912 qemu_get_be32s(f, &s->icr[1]);
913 qemu_get_be32s(f, &s->divide_conf);
914 s->count_shift=qemu_get_be32(f);
915 qemu_get_be32s(f, &s->initial_count);
916 s->initial_count_load_time=qemu_get_be64(f);
917 s->next_time=qemu_get_be64(f);
920 qemu_get_timer(f, s->timer);
924 static const VMStateDescription vmstate_apic = {
927 .minimum_version_id = 3,
928 .minimum_version_id_old = 1,
929 .load_state_old = apic_load_old,
930 .fields = (VMStateField []) {
931 VMSTATE_UINT32(apicbase, APICState),
932 VMSTATE_UINT8(id, APICState),
933 VMSTATE_UINT8(arb_id, APICState),
934 VMSTATE_UINT8(tpr, APICState),
935 VMSTATE_UINT32(spurious_vec, APICState),
936 VMSTATE_UINT8(log_dest, APICState),
937 VMSTATE_UINT8(dest_mode, APICState),
938 VMSTATE_UINT32_ARRAY(isr, APICState, 8),
939 VMSTATE_UINT32_ARRAY(tmr, APICState, 8),
940 VMSTATE_UINT32_ARRAY(irr, APICState, 8),
941 VMSTATE_UINT32_ARRAY(lvt, APICState, APIC_LVT_NB),
942 VMSTATE_UINT32(esr, APICState),
943 VMSTATE_UINT32_ARRAY(icr, APICState, 2),
944 VMSTATE_UINT32(divide_conf, APICState),
945 VMSTATE_INT32(count_shift, APICState),
946 VMSTATE_UINT32(initial_count, APICState),
947 VMSTATE_INT64(initial_count_load_time, APICState),
948 VMSTATE_INT64(next_time, APICState),
949 VMSTATE_TIMER(timer, APICState),
950 VMSTATE_END_OF_LIST()
954 static void apic_reset(void *opaque)
956 APICState *s = opaque;
959 bsp = cpu_is_bsp(s->cpu_env);
960 s->apicbase = 0xfee00000 |
961 (bsp ? MSR_IA32_APICBASE_BSP : 0) | MSR_IA32_APICBASE_ENABLE;
963 cpu_reset(s->cpu_env);
964 apic_init_reset(s->cpu_env);
968 * LINT0 delivery mode on CPU #0 is set to ExtInt at initialization
969 * time typically by BIOS, so PIC interrupt can be delivered to the
970 * processor when local APIC is enabled.
972 s->lvt[APIC_LVT_LINT0] = 0x700;
976 static CPUReadMemoryFunc * const apic_mem_read[3] = {
982 static CPUWriteMemoryFunc * const apic_mem_write[3] = {
988 int apic_init(CPUState *env)
992 if (last_apic_idx >= MAX_APICS)
994 s = qemu_mallocz(sizeof(APICState));
996 s->idx = last_apic_idx++;
997 s->id = env->cpuid_apic_id;
1002 /* XXX: mapping more APICs at the same memory location */
1003 if (apic_io_memory == 0) {
1004 /* NOTE: the APIC is directly connected to the CPU - it is not
1005 on the global memory bus. */
1006 apic_io_memory = cpu_register_io_memory(apic_mem_read,
1007 apic_mem_write, NULL);
1008 /* XXX: what if the base changes? */
1009 cpu_register_physical_memory(MSI_ADDR_BASE, MSI_ADDR_SIZE,
1012 s->timer = qemu_new_timer(vm_clock, apic_timer, s);
1014 vmstate_register(s->idx, &vmstate_apic, s);
1015 qemu_register_reset(apic_reset, s);
1017 local_apics[s->idx] = s;