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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "qemu-timer.h"
25 //#define DEBUG_IOAPIC
27 /* APIC Local Vector Table */
28 #define APIC_LVT_TIMER 0
29 #define APIC_LVT_THERMAL 1
30 #define APIC_LVT_PERFORM 2
31 #define APIC_LVT_LINT0 3
32 #define APIC_LVT_LINT1 4
33 #define APIC_LVT_ERROR 5
36 /* APIC delivery modes */
37 #define APIC_DM_FIXED 0
38 #define APIC_DM_LOWPRI 1
41 #define APIC_DM_INIT 5
42 #define APIC_DM_SIPI 6
43 #define APIC_DM_EXTINT 7
45 /* APIC destination mode */
46 #define APIC_DESTMODE_FLAT 0xf
47 #define APIC_DESTMODE_CLUSTER 1
49 #define APIC_TRIGGER_EDGE 0
50 #define APIC_TRIGGER_LEVEL 1
52 #define APIC_LVT_TIMER_PERIODIC (1<<17)
53 #define APIC_LVT_MASKED (1<<16)
54 #define APIC_LVT_LEVEL_TRIGGER (1<<15)
55 #define APIC_LVT_REMOTE_IRR (1<<14)
56 #define APIC_INPUT_POLARITY (1<<13)
57 #define APIC_SEND_PENDING (1<<12)
59 #define IOAPIC_NUM_PINS 0x18
61 #define ESR_ILLEGAL_ADDRESS (1 << 7)
63 #define APIC_SV_ENABLE (1 << 8)
66 #define MAX_APIC_WORDS 8
68 typedef struct APICState {
74 uint32_t spurious_vec;
77 uint32_t isr[8]; /* in service register */
78 uint32_t tmr[8]; /* trigger mode register */
79 uint32_t irr[8]; /* interrupt request register */
80 uint32_t lvt[APIC_LVT_NB];
81 uint32_t esr; /* error register */
86 uint32_t initial_count;
87 int64_t initial_count_load_time, next_time;
96 uint64_t ioredtbl[IOAPIC_NUM_PINS];
99 static int apic_io_memory;
100 static APICState *local_apics[MAX_APICS + 1];
101 static int last_apic_id = 0;
103 static void apic_init_ipi(APICState *s);
104 static void apic_set_irq(APICState *s, int vector_num, int trigger_mode);
105 static void apic_update_irq(APICState *s);
107 /* Find first bit starting from msb. Return 0 if value = 0 */
108 static int fls_bit(uint32_t value)
110 unsigned int ret = 0;
112 #if defined(HOST_I386)
113 __asm__ __volatile__ ("bsr %1, %0\n" : "+r" (ret) : "rm" (value));
117 value >>= 16, ret = 16;
119 value >>= 8, ret += 8;
121 value >>= 4, ret += 4;
123 value >>= 2, ret += 2;
124 return ret + (value >> 1);
128 /* Find first bit starting from lsb. Return 0 if value = 0 */
129 static int ffs_bit(uint32_t value)
131 unsigned int ret = 0;
133 #if defined(HOST_I386)
134 __asm__ __volatile__ ("bsf %1, %0\n" : "+r" (ret) : "rm" (value));
139 if (!(value & 0xffff))
140 value >>= 16, ret = 16;
142 value >>= 8, ret += 8;
144 value >>= 4, ret += 4;
146 value >>= 2, ret += 2;
153 static inline void set_bit(uint32_t *tab, int index)
157 mask = 1 << (index & 0x1f);
161 static inline void reset_bit(uint32_t *tab, int index)
165 mask = 1 << (index & 0x1f);
169 #define foreach_apic(apic, deliver_bitmask, code) \
171 int __i, __j, __mask;\
172 for(__i = 0; __i < MAX_APIC_WORDS; __i++) {\
173 __mask = deliver_bitmask[__i];\
175 for(__j = 0; __j < 32; __j++) {\
176 if (__mask & (1 << __j)) {\
177 apic = local_apics[__i * 32 + __j];\
187 static void apic_bus_deliver(const uint32_t *deliver_bitmask,
188 uint8_t delivery_mode,
189 uint8_t vector_num, uint8_t polarity,
190 uint8_t trigger_mode)
192 APICState *apic_iter;
194 switch (delivery_mode) {
196 /* XXX: search for focus processor, arbitration */
200 for(i = 0; i < MAX_APIC_WORDS; i++) {
201 if (deliver_bitmask[i]) {
202 d = i * 32 + ffs_bit(deliver_bitmask[i]);
207 apic_iter = local_apics[d];
209 apic_set_irq(apic_iter, vector_num, trigger_mode);
223 /* normal INIT IPI sent to processors */
224 foreach_apic(apic_iter, deliver_bitmask,
225 apic_init_ipi(apic_iter) );
229 /* handled in I/O APIC code */
236 foreach_apic(apic_iter, deliver_bitmask,
237 apic_set_irq(apic_iter, vector_num, trigger_mode) );
240 void cpu_set_apic_base(CPUState *env, uint64_t val)
242 APICState *s = env->apic_state;
244 printf("cpu_set_apic_base: %016" PRIx64 "\n", val);
246 s->apicbase = (val & 0xfffff000) |
247 (s->apicbase & (MSR_IA32_APICBASE_BSP | MSR_IA32_APICBASE_ENABLE));
248 /* if disabled, cannot be enabled again */
249 if (!(val & MSR_IA32_APICBASE_ENABLE)) {
250 s->apicbase &= ~MSR_IA32_APICBASE_ENABLE;
251 env->cpuid_features &= ~CPUID_APIC;
252 s->spurious_vec &= ~APIC_SV_ENABLE;
256 uint64_t cpu_get_apic_base(CPUState *env)
258 APICState *s = env->apic_state;
260 printf("cpu_get_apic_base: %016" PRIx64 "\n", (uint64_t)s->apicbase);
265 void cpu_set_apic_tpr(CPUX86State *env, uint8_t val)
267 APICState *s = env->apic_state;
268 s->tpr = (val & 0x0f) << 4;
272 uint8_t cpu_get_apic_tpr(CPUX86State *env)
274 APICState *s = env->apic_state;
278 /* return -1 if no bit is set */
279 static int get_highest_priority_int(uint32_t *tab)
282 for(i = 7; i >= 0; i--) {
284 return i * 32 + fls_bit(tab[i]);
290 static int apic_get_ppr(APICState *s)
295 isrv = get_highest_priority_int(s->isr);
306 static int apic_get_arb_pri(APICState *s)
308 /* XXX: arbitration */
312 /* signal the CPU if an irq is pending */
313 static void apic_update_irq(APICState *s)
316 if (!(s->spurious_vec & APIC_SV_ENABLE))
318 irrv = get_highest_priority_int(s->irr);
321 ppr = apic_get_ppr(s);
322 if (ppr && (irrv & 0xf0) <= (ppr & 0xf0))
324 cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
327 static void apic_set_irq(APICState *s, int vector_num, int trigger_mode)
329 set_bit(s->irr, vector_num);
331 set_bit(s->tmr, vector_num);
333 reset_bit(s->tmr, vector_num);
337 static void apic_eoi(APICState *s)
340 isrv = get_highest_priority_int(s->isr);
343 reset_bit(s->isr, isrv);
344 /* XXX: send the EOI packet to the APIC bus to allow the I/O APIC to
345 set the remote IRR bit for level triggered interrupts. */
349 static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask,
350 uint8_t dest, uint8_t dest_mode)
352 APICState *apic_iter;
355 if (dest_mode == 0) {
357 memset(deliver_bitmask, 0xff, MAX_APIC_WORDS * sizeof(uint32_t));
359 memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
360 set_bit(deliver_bitmask, dest);
363 /* XXX: cluster mode */
364 memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
365 for(i = 0; i < MAX_APICS; i++) {
366 apic_iter = local_apics[i];
368 if (apic_iter->dest_mode == 0xf) {
369 if (dest & apic_iter->log_dest)
370 set_bit(deliver_bitmask, i);
371 } else if (apic_iter->dest_mode == 0x0) {
372 if ((dest & 0xf0) == (apic_iter->log_dest & 0xf0) &&
373 (dest & apic_iter->log_dest & 0x0f)) {
374 set_bit(deliver_bitmask, i);
383 static void apic_init_ipi(APICState *s)
388 s->spurious_vec = 0xff;
391 memset(s->isr, 0, sizeof(s->isr));
392 memset(s->tmr, 0, sizeof(s->tmr));
393 memset(s->irr, 0, sizeof(s->irr));
394 for(i = 0; i < APIC_LVT_NB; i++)
395 s->lvt[i] = 1 << 16; /* mask LVT */
397 memset(s->icr, 0, sizeof(s->icr));
400 s->initial_count = 0;
401 s->initial_count_load_time = 0;
405 /* send a SIPI message to the CPU to start it */
406 static void apic_startup(APICState *s, int vector_num)
408 CPUState *env = s->cpu_env;
409 if (!(env->hflags & HF_HALTED_MASK))
412 cpu_x86_load_seg_cache(env, R_CS, vector_num << 8, vector_num << 12,
414 env->hflags &= ~HF_HALTED_MASK;
417 static void apic_deliver(APICState *s, uint8_t dest, uint8_t dest_mode,
418 uint8_t delivery_mode, uint8_t vector_num,
419 uint8_t polarity, uint8_t trigger_mode)
421 uint32_t deliver_bitmask[MAX_APIC_WORDS];
422 int dest_shorthand = (s->icr[0] >> 18) & 3;
423 APICState *apic_iter;
425 switch (dest_shorthand) {
427 apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
430 memset(deliver_bitmask, 0x00, sizeof(deliver_bitmask));
431 set_bit(deliver_bitmask, s->id);
434 memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
437 memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
438 reset_bit(deliver_bitmask, s->id);
442 switch (delivery_mode) {
445 int trig_mode = (s->icr[0] >> 15) & 1;
446 int level = (s->icr[0] >> 14) & 1;
447 if (level == 0 && trig_mode == 1) {
448 foreach_apic(apic_iter, deliver_bitmask,
449 apic_iter->arb_id = apic_iter->id );
456 foreach_apic(apic_iter, deliver_bitmask,
457 apic_startup(apic_iter, vector_num) );
461 apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, polarity,
465 int apic_get_interrupt(CPUState *env)
467 APICState *s = env->apic_state;
470 /* if the APIC is installed or enabled, we let the 8259 handle the
474 if (!(s->spurious_vec & APIC_SV_ENABLE))
477 /* XXX: spurious IRQ handling */
478 intno = get_highest_priority_int(s->irr);
481 if (s->tpr && intno <= s->tpr)
482 return s->spurious_vec & 0xff;
483 reset_bit(s->irr, intno);
484 set_bit(s->isr, intno);
489 int apic_accept_pic_intr(CPUState *env)
491 APICState *s = env->apic_state;
497 lvt0 = s->lvt[APIC_LVT_LINT0];
500 ((s->apicbase & MSR_IA32_APICBASE_ENABLE) == 0 ||
501 ((lvt0 & APIC_LVT_MASKED) == 0 &&
502 ((lvt0 >> 8) & 0x7) == APIC_DM_EXTINT)))
508 static uint32_t apic_get_current_count(APICState *s)
512 d = (qemu_get_clock(vm_clock) - s->initial_count_load_time) >>
514 if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
516 val = s->initial_count - (d % ((uint64_t)s->initial_count + 1));
518 if (d >= s->initial_count)
521 val = s->initial_count - d;
526 static void apic_timer_update(APICState *s, int64_t current_time)
528 int64_t next_time, d;
530 if (!(s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED)) {
531 d = (current_time - s->initial_count_load_time) >>
533 if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
534 d = ((d / ((uint64_t)s->initial_count + 1)) + 1) * ((uint64_t)s->initial_count + 1);
536 if (d >= s->initial_count)
538 d = (uint64_t)s->initial_count + 1;
540 next_time = s->initial_count_load_time + (d << s->count_shift);
541 qemu_mod_timer(s->timer, next_time);
542 s->next_time = next_time;
545 qemu_del_timer(s->timer);
549 static void apic_timer(void *opaque)
551 APICState *s = opaque;
553 if (!(s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED)) {
554 apic_set_irq(s, s->lvt[APIC_LVT_TIMER] & 0xff, APIC_TRIGGER_EDGE);
556 apic_timer_update(s, s->next_time);
559 static uint32_t apic_mem_readb(void *opaque, target_phys_addr_t addr)
564 static uint32_t apic_mem_readw(void *opaque, target_phys_addr_t addr)
569 static void apic_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
573 static void apic_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
577 static uint32_t apic_mem_readl(void *opaque, target_phys_addr_t addr)
584 env = cpu_single_env;
589 index = (addr >> 4) & 0xff;
594 case 0x03: /* version */
595 val = 0x11 | ((APIC_LVT_NB - 1) << 16); /* version 0x11 */
601 val = apic_get_arb_pri(s);
605 val = apic_get_ppr(s);
608 val = s->log_dest << 24;
611 val = s->dest_mode << 28;
614 val = s->spurious_vec;
617 val = s->isr[index & 7];
620 val = s->tmr[index & 7];
623 val = s->irr[index & 7];
630 val = s->icr[index & 1];
633 val = s->lvt[index - 0x32];
636 val = s->initial_count;
639 val = apic_get_current_count(s);
642 val = s->divide_conf;
645 s->esr |= ESR_ILLEGAL_ADDRESS;
650 printf("APIC read: %08x = %08x\n", (uint32_t)addr, val);
655 static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
661 env = cpu_single_env;
667 printf("APIC write: %08x = %08x\n", (uint32_t)addr, val);
670 index = (addr >> 4) & 0xff;
688 s->log_dest = val >> 24;
691 s->dest_mode = val >> 28;
694 s->spurious_vec = val & 0x1ff;
704 apic_deliver(s, (s->icr[1] >> 24) & 0xff, (s->icr[0] >> 11) & 1,
705 (s->icr[0] >> 8) & 7, (s->icr[0] & 0xff),
706 (s->icr[0] >> 14) & 1, (s->icr[0] >> 15) & 1);
713 int n = index - 0x32;
715 if (n == APIC_LVT_TIMER)
716 apic_timer_update(s, qemu_get_clock(vm_clock));
720 s->initial_count = val;
721 s->initial_count_load_time = qemu_get_clock(vm_clock);
722 apic_timer_update(s, s->initial_count_load_time);
729 s->divide_conf = val & 0xb;
730 v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);
731 s->count_shift = (v + 1) & 7;
735 s->esr |= ESR_ILLEGAL_ADDRESS;
740 static void apic_save(QEMUFile *f, void *opaque)
742 APICState *s = opaque;
745 qemu_put_be32s(f, &s->apicbase);
746 qemu_put_8s(f, &s->id);
747 qemu_put_8s(f, &s->arb_id);
748 qemu_put_8s(f, &s->tpr);
749 qemu_put_be32s(f, &s->spurious_vec);
750 qemu_put_8s(f, &s->log_dest);
751 qemu_put_8s(f, &s->dest_mode);
752 for (i = 0; i < 8; i++) {
753 qemu_put_be32s(f, &s->isr[i]);
754 qemu_put_be32s(f, &s->tmr[i]);
755 qemu_put_be32s(f, &s->irr[i]);
757 for (i = 0; i < APIC_LVT_NB; i++) {
758 qemu_put_be32s(f, &s->lvt[i]);
760 qemu_put_be32s(f, &s->esr);
761 qemu_put_be32s(f, &s->icr[0]);
762 qemu_put_be32s(f, &s->icr[1]);
763 qemu_put_be32s(f, &s->divide_conf);
764 qemu_put_be32s(f, &s->count_shift);
765 qemu_put_be32s(f, &s->initial_count);
766 qemu_put_be64s(f, &s->initial_count_load_time);
767 qemu_put_be64s(f, &s->next_time);
769 qemu_put_timer(f, s->timer);
772 static int apic_load(QEMUFile *f, void *opaque, int version_id)
774 APICState *s = opaque;
780 /* XXX: what if the base changes? (registered memory regions) */
781 qemu_get_be32s(f, &s->apicbase);
782 qemu_get_8s(f, &s->id);
783 qemu_get_8s(f, &s->arb_id);
784 qemu_get_8s(f, &s->tpr);
785 qemu_get_be32s(f, &s->spurious_vec);
786 qemu_get_8s(f, &s->log_dest);
787 qemu_get_8s(f, &s->dest_mode);
788 for (i = 0; i < 8; i++) {
789 qemu_get_be32s(f, &s->isr[i]);
790 qemu_get_be32s(f, &s->tmr[i]);
791 qemu_get_be32s(f, &s->irr[i]);
793 for (i = 0; i < APIC_LVT_NB; i++) {
794 qemu_get_be32s(f, &s->lvt[i]);
796 qemu_get_be32s(f, &s->esr);
797 qemu_get_be32s(f, &s->icr[0]);
798 qemu_get_be32s(f, &s->icr[1]);
799 qemu_get_be32s(f, &s->divide_conf);
800 qemu_get_be32s(f, &s->count_shift);
801 qemu_get_be32s(f, &s->initial_count);
802 qemu_get_be64s(f, &s->initial_count_load_time);
803 qemu_get_be64s(f, &s->next_time);
806 qemu_get_timer(f, s->timer);
810 static void apic_reset(void *opaque)
812 APICState *s = opaque;
816 * LINT0 delivery mode is set to ExtInt at initialization time
817 * typically by BIOS, so PIC interrupt can be delivered to the
818 * processor when local APIC is enabled.
820 s->lvt[APIC_LVT_LINT0] = 0x700;
823 static CPUReadMemoryFunc *apic_mem_read[3] = {
829 static CPUWriteMemoryFunc *apic_mem_write[3] = {
835 int apic_init(CPUState *env)
839 if (last_apic_id >= MAX_APICS)
841 s = qemu_mallocz(sizeof(APICState));
846 s->id = last_apic_id++;
847 env->cpuid_apic_id = s->id;
849 s->apicbase = 0xfee00000 |
850 (s->id ? 0 : MSR_IA32_APICBASE_BSP) | MSR_IA32_APICBASE_ENABLE;
853 * LINT0 delivery mode is set to ExtInt at initialization time
854 * typically by BIOS, so PIC interrupt can be delivered to the
855 * processor when local APIC is enabled.
857 s->lvt[APIC_LVT_LINT0] = 0x700;
859 /* XXX: mapping more APICs at the same memory location */
860 if (apic_io_memory == 0) {
861 /* NOTE: the APIC is directly connected to the CPU - it is not
862 on the global memory bus. */
863 apic_io_memory = cpu_register_io_memory(0, apic_mem_read,
864 apic_mem_write, NULL);
865 cpu_register_physical_memory(s->apicbase & ~0xfff, 0x1000,
868 s->timer = qemu_new_timer(vm_clock, apic_timer, s);
870 register_savevm("apic", s->id, 2, apic_save, apic_load, s);
871 qemu_register_reset(apic_reset, s);
873 local_apics[s->id] = s;
877 static void ioapic_service(IOAPICState *s)
882 uint8_t delivery_mode;
888 uint32_t deliver_bitmask[MAX_APIC_WORDS];
890 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
893 entry = s->ioredtbl[i];
894 if (!(entry & APIC_LVT_MASKED)) {
895 trig_mode = ((entry >> 15) & 1);
897 dest_mode = (entry >> 11) & 1;
898 delivery_mode = (entry >> 8) & 7;
899 polarity = (entry >> 13) & 1;
900 if (trig_mode == APIC_TRIGGER_EDGE)
902 if (delivery_mode == APIC_DM_EXTINT)
903 vector = pic_read_irq(isa_pic);
905 vector = entry & 0xff;
907 apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
908 apic_bus_deliver(deliver_bitmask, delivery_mode,
909 vector, polarity, trig_mode);
915 void ioapic_set_irq(void *opaque, int vector, int level)
917 IOAPICState *s = opaque;
919 if (vector >= 0 && vector < IOAPIC_NUM_PINS) {
920 uint32_t mask = 1 << vector;
921 uint64_t entry = s->ioredtbl[vector];
923 if ((entry >> 15) & 1) {
924 /* level triggered */
941 static uint32_t ioapic_mem_readl(void *opaque, target_phys_addr_t addr)
943 IOAPICState *s = opaque;
950 } else if (addr == 0x10) {
951 switch (s->ioregsel) {
956 val = 0x11 | ((IOAPIC_NUM_PINS - 1) << 16); /* version 0x11 */
962 index = (s->ioregsel - 0x10) >> 1;
963 if (index >= 0 && index < IOAPIC_NUM_PINS) {
965 val = s->ioredtbl[index] >> 32;
967 val = s->ioredtbl[index] & 0xffffffff;
971 printf("I/O APIC read: %08x = %08x\n", s->ioregsel, val);
977 static void ioapic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
979 IOAPICState *s = opaque;
986 } else if (addr == 0x10) {
988 printf("I/O APIC write: %08x = %08x\n", s->ioregsel, val);
990 switch (s->ioregsel) {
992 s->id = (val >> 24) & 0xff;
998 index = (s->ioregsel - 0x10) >> 1;
999 if (index >= 0 && index < IOAPIC_NUM_PINS) {
1000 if (s->ioregsel & 1) {
1001 s->ioredtbl[index] &= 0xffffffff;
1002 s->ioredtbl[index] |= (uint64_t)val << 32;
1004 s->ioredtbl[index] &= ~0xffffffffULL;
1005 s->ioredtbl[index] |= val;
1013 static void ioapic_save(QEMUFile *f, void *opaque)
1015 IOAPICState *s = opaque;
1018 qemu_put_8s(f, &s->id);
1019 qemu_put_8s(f, &s->ioregsel);
1020 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
1021 qemu_put_be64s(f, &s->ioredtbl[i]);
1025 static int ioapic_load(QEMUFile *f, void *opaque, int version_id)
1027 IOAPICState *s = opaque;
1030 if (version_id != 1)
1033 qemu_get_8s(f, &s->id);
1034 qemu_get_8s(f, &s->ioregsel);
1035 for (i = 0; i < IOAPIC_NUM_PINS; i++) {
1036 qemu_get_be64s(f, &s->ioredtbl[i]);
1041 static void ioapic_reset(void *opaque)
1043 IOAPICState *s = opaque;
1046 memset(s, 0, sizeof(*s));
1047 for(i = 0; i < IOAPIC_NUM_PINS; i++)
1048 s->ioredtbl[i] = 1 << 16; /* mask LVT */
1051 static CPUReadMemoryFunc *ioapic_mem_read[3] = {
1057 static CPUWriteMemoryFunc *ioapic_mem_write[3] = {
1063 IOAPICState *ioapic_init(void)
1068 s = qemu_mallocz(sizeof(IOAPICState));
1072 s->id = last_apic_id++;
1074 io_memory = cpu_register_io_memory(0, ioapic_mem_read,
1075 ioapic_mem_write, s);
1076 cpu_register_physical_memory(0xfec00000, 0x1000, io_memory);
1078 register_savevm("ioapic", 0, 1, ioapic_save, ioapic_load, s);
1079 qemu_register_reset(ioapic_reset, s);