/*
* APIC support
- *
+ *
* Copyright (c) 2004-2005 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
#include "vl.h"
//#define DEBUG_APIC
+//#define DEBUG_IOAPIC
/* APIC Local Vector Table */
#define APIC_LVT_TIMER 0
#define APIC_DM_SIPI 6
#define APIC_DM_EXTINT 7
+/* APIC destination mode */
+#define APIC_DESTMODE_FLAT 0xf
+#define APIC_DESTMODE_CLUSTER 1
+
#define APIC_TRIGGER_EDGE 0
#define APIC_TRIGGER_LEVEL 1
#define APIC_INPUT_POLARITY (1<<13)
#define APIC_SEND_PENDING (1<<12)
+#define IOAPIC_NUM_PINS 0x18
+
#define ESR_ILLEGAL_ADDRESS (1 << 7)
#define APIC_SV_ENABLE (1 << 8)
+#define MAX_APICS 255
+#define MAX_APIC_WORDS 8
+
typedef struct APICState {
CPUState *cpu_env;
uint32_t apicbase;
uint8_t id;
+ uint8_t arb_id;
uint8_t tpr;
uint32_t spurious_vec;
+ uint8_t log_dest;
+ uint8_t dest_mode;
uint32_t isr[8]; /* in service register */
uint32_t tmr[8]; /* trigger mode register */
uint32_t irr[8]; /* interrupt request register */
QEMUTimer *timer;
} APICState;
+struct IOAPICState {
+ uint8_t id;
+ uint8_t ioregsel;
+
+ uint32_t irr;
+ uint64_t ioredtbl[IOAPIC_NUM_PINS];
+};
+
static int apic_io_memory;
+static APICState *local_apics[MAX_APICS + 1];
+static int last_apic_id = 0;
+
+static void apic_init_ipi(APICState *s);
+static void apic_set_irq(APICState *s, int vector_num, int trigger_mode);
+static void apic_update_irq(APICState *s);
+
+/* Find first bit starting from msb. Return 0 if value = 0 */
+static int fls_bit(uint32_t value)
+{
+ unsigned int ret = 0;
+
+#if defined(HOST_I386)
+ __asm__ __volatile__ ("bsr %1, %0\n" : "+r" (ret) : "rm" (value));
+ return ret;
+#else
+ if (value > 0xffff)
+ value >>= 16, ret = 16;
+ if (value > 0xff)
+ value >>= 8, ret += 8;
+ if (value > 0xf)
+ value >>= 4, ret += 4;
+ if (value > 0x3)
+ value >>= 2, ret += 2;
+ return ret + (value >> 1);
+#endif
+}
+
+/* Find first bit starting from lsb. Return 0 if value = 0 */
+static int ffs_bit(uint32_t value)
+{
+ unsigned int ret = 0;
+
+#if defined(HOST_I386)
+ __asm__ __volatile__ ("bsf %1, %0\n" : "+r" (ret) : "rm" (value));
+ return ret;
+#else
+ if (!value)
+ return 0;
+ if (!(value & 0xffff))
+ value >>= 16, ret = 16;
+ if (!(value & 0xff))
+ value >>= 8, ret += 8;
+ if (!(value & 0xf))
+ value >>= 4, ret += 4;
+ if (!(value & 0x3))
+ value >>= 2, ret += 2;
+ if (!(value & 0x1))
+ ret++;
+ return ret;
+#endif
+}
+
+static inline void set_bit(uint32_t *tab, int index)
+{
+ int i, mask;
+ i = index >> 5;
+ mask = 1 << (index & 0x1f);
+ tab[i] |= mask;
+}
+
+static inline void reset_bit(uint32_t *tab, int index)
+{
+ int i, mask;
+ i = index >> 5;
+ mask = 1 << (index & 0x1f);
+ tab[i] &= ~mask;
+}
+
+#define foreach_apic(apic, deliver_bitmask, code) \
+{\
+ int __i, __j, __mask;\
+ for(__i = 0; __i < MAX_APIC_WORDS; __i++) {\
+ __mask = deliver_bitmask[__i];\
+ if (__mask) {\
+ for(__j = 0; __j < 32; __j++) {\
+ if (__mask & (1 << __j)) {\
+ apic = local_apics[__i * 32 + __j];\
+ if (apic) {\
+ code;\
+ }\
+ }\
+ }\
+ }\
+ }\
+}
+
+static void apic_bus_deliver(const uint32_t *deliver_bitmask,
+ uint8_t delivery_mode,
+ uint8_t vector_num, uint8_t polarity,
+ uint8_t trigger_mode)
+{
+ APICState *apic_iter;
+
+ switch (delivery_mode) {
+ case APIC_DM_LOWPRI:
+ /* XXX: search for focus processor, arbitration */
+ {
+ int i, d;
+ d = -1;
+ for(i = 0; i < MAX_APIC_WORDS; i++) {
+ if (deliver_bitmask[i]) {
+ d = i * 32 + ffs_bit(deliver_bitmask[i]);
+ break;
+ }
+ }
+ if (d >= 0) {
+ apic_iter = local_apics[d];
+ if (apic_iter) {
+ apic_set_irq(apic_iter, vector_num, trigger_mode);
+ }
+ }
+ }
+ return;
+
+ case APIC_DM_FIXED:
+ break;
+
+ case APIC_DM_SMI:
+ case APIC_DM_NMI:
+ break;
+
+ case APIC_DM_INIT:
+ /* normal INIT IPI sent to processors */
+ foreach_apic(apic_iter, deliver_bitmask,
+ apic_init_ipi(apic_iter) );
+ return;
+
+ case APIC_DM_EXTINT:
+ /* handled in I/O APIC code */
+ break;
+
+ default:
+ return;
+ }
+
+ foreach_apic(apic_iter, deliver_bitmask,
+ apic_set_irq(apic_iter, vector_num, trigger_mode) );
+}
void cpu_set_apic_base(CPUState *env, uint64_t val)
{
APICState *s = env->apic_state;
#ifdef DEBUG_APIC
- printf("cpu_set_apic_base: %016llx\n", val);
+ printf("cpu_set_apic_base: %016" PRIx64 "\n", val);
#endif
- s->apicbase = (val & 0xfffff000) |
+ s->apicbase = (val & 0xfffff000) |
(s->apicbase & (MSR_IA32_APICBASE_BSP | MSR_IA32_APICBASE_ENABLE));
/* if disabled, cannot be enabled again */
if (!(val & MSR_IA32_APICBASE_ENABLE)) {
{
APICState *s = env->apic_state;
#ifdef DEBUG_APIC
- printf("cpu_get_apic_base: %016llx\n", (uint64_t)s->apicbase);
+ printf("cpu_get_apic_base: %016" PRIx64 "\n", (uint64_t)s->apicbase);
#endif
return s->apicbase;
}
{
APICState *s = env->apic_state;
s->tpr = (val & 0x0f) << 4;
+ apic_update_irq(s);
}
uint8_t cpu_get_apic_tpr(CPUX86State *env)
static int get_highest_priority_int(uint32_t *tab)
{
int i;
- for(i = 0;i < 8; i++) {
+ for(i = 7; i >= 0; i--) {
if (tab[i] != 0) {
- return i * 32 + ffs(tab[i]) - 1;
+ return i * 32 + fls_bit(tab[i]);
}
}
return -1;
}
-static inline void set_bit(uint32_t *tab, int index)
-{
- int i, mask;
- i = index >> 5;
- mask = 1 << (index & 0x1f);
- tab[i] |= mask;
-}
-
-static inline void reset_bit(uint32_t *tab, int index)
-{
- int i, mask;
- i = index >> 5;
- mask = 1 << (index & 0x1f);
- tab[i] &= ~mask;
-}
-
static int apic_get_ppr(APICState *s)
{
int tpr, isrv, ppr;
return ppr;
}
+static int apic_get_arb_pri(APICState *s)
+{
+ /* XXX: arbitration */
+ return 0;
+}
+
/* signal the CPU if an irq is pending */
static void apic_update_irq(APICState *s)
{
- int irrv, isrv;
+ int irrv, ppr;
+ if (!(s->spurious_vec & APIC_SV_ENABLE))
+ return;
irrv = get_highest_priority_int(s->irr);
if (irrv < 0)
return;
- isrv = get_highest_priority_int(s->isr);
- /* if the pending irq has less priority, we do not make a new request */
- if (isrv >= 0 && irrv >= isrv)
+ ppr = apic_get_ppr(s);
+ if (ppr && (irrv & 0xf0) <= (ppr & 0xf0))
return;
cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
}
if (isrv < 0)
return;
reset_bit(s->isr, isrv);
+ /* XXX: send the EOI packet to the APIC bus to allow the I/O APIC to
+ set the remote IRR bit for level triggered interrupts. */
apic_update_irq(s);
}
+static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask,
+ uint8_t dest, uint8_t dest_mode)
+{
+ APICState *apic_iter;
+ int i;
+
+ if (dest_mode == 0) {
+ if (dest == 0xff) {
+ memset(deliver_bitmask, 0xff, MAX_APIC_WORDS * sizeof(uint32_t));
+ } else {
+ memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
+ set_bit(deliver_bitmask, dest);
+ }
+ } else {
+ /* XXX: cluster mode */
+ memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
+ for(i = 0; i < MAX_APICS; i++) {
+ apic_iter = local_apics[i];
+ if (apic_iter) {
+ if (apic_iter->dest_mode == 0xf) {
+ if (dest & apic_iter->log_dest)
+ set_bit(deliver_bitmask, i);
+ } else if (apic_iter->dest_mode == 0x0) {
+ if ((dest & 0xf0) == (apic_iter->log_dest & 0xf0) &&
+ (dest & apic_iter->log_dest & 0x0f)) {
+ set_bit(deliver_bitmask, i);
+ }
+ }
+ }
+ }
+ }
+}
+
+
+static void apic_init_ipi(APICState *s)
+{
+ int i;
+
+ s->tpr = 0;
+ s->spurious_vec = 0xff;
+ s->log_dest = 0;
+ s->dest_mode = 0xf;
+ memset(s->isr, 0, sizeof(s->isr));
+ memset(s->tmr, 0, sizeof(s->tmr));
+ memset(s->irr, 0, sizeof(s->irr));
+ for(i = 0; i < APIC_LVT_NB; i++)
+ s->lvt[i] = 1 << 16; /* mask LVT */
+ s->esr = 0;
+ memset(s->icr, 0, sizeof(s->icr));
+ s->divide_conf = 0;
+ s->count_shift = 0;
+ s->initial_count = 0;
+ s->initial_count_load_time = 0;
+ s->next_time = 0;
+}
+
+/* send a SIPI message to the CPU to start it */
+static void apic_startup(APICState *s, int vector_num)
+{
+ CPUState *env = s->cpu_env;
+ if (!(env->hflags & HF_HALTED_MASK))
+ return;
+ env->eip = 0;
+ cpu_x86_load_seg_cache(env, R_CS, vector_num << 8, vector_num << 12,
+ 0xffff, 0);
+ env->hflags &= ~HF_HALTED_MASK;
+}
+
+static void apic_deliver(APICState *s, uint8_t dest, uint8_t dest_mode,
+ uint8_t delivery_mode, uint8_t vector_num,
+ uint8_t polarity, uint8_t trigger_mode)
+{
+ uint32_t deliver_bitmask[MAX_APIC_WORDS];
+ int dest_shorthand = (s->icr[0] >> 18) & 3;
+ APICState *apic_iter;
+
+ switch (dest_shorthand) {
+ case 0:
+ apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
+ break;
+ case 1:
+ memset(deliver_bitmask, 0x00, sizeof(deliver_bitmask));
+ set_bit(deliver_bitmask, s->id);
+ break;
+ case 2:
+ memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
+ break;
+ case 3:
+ memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask));
+ reset_bit(deliver_bitmask, s->id);
+ break;
+ }
+
+ switch (delivery_mode) {
+ case APIC_DM_INIT:
+ {
+ int trig_mode = (s->icr[0] >> 15) & 1;
+ int level = (s->icr[0] >> 14) & 1;
+ if (level == 0 && trig_mode == 1) {
+ foreach_apic(apic_iter, deliver_bitmask,
+ apic_iter->arb_id = apic_iter->id );
+ return;
+ }
+ }
+ break;
+
+ case APIC_DM_SIPI:
+ foreach_apic(apic_iter, deliver_bitmask,
+ apic_startup(apic_iter, vector_num) );
+ return;
+ }
+
+ apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, polarity,
+ trigger_mode);
+}
+
int apic_get_interrupt(CPUState *env)
{
APICState *s = env->apic_state;
return -1;
if (!(s->spurious_vec & APIC_SV_ENABLE))
return -1;
-
+
/* XXX: spurious IRQ handling */
intno = get_highest_priority_int(s->irr);
if (intno < 0)
return -1;
+ if (s->tpr && intno <= s->tpr)
+ return s->spurious_vec & 0xff;
reset_bit(s->irr, intno);
set_bit(s->isr, intno);
apic_update_irq(s);
return intno;
}
+int apic_accept_pic_intr(CPUState *env)
+{
+ APICState *s = env->apic_state;
+ uint32_t lvt0;
+
+ if (!s)
+ return -1;
+
+ lvt0 = s->lvt[APIC_LVT_LINT0];
+
+ if (s->id == 0 &&
+ ((s->apicbase & MSR_IA32_APICBASE_ENABLE) == 0 ||
+ ((lvt0 & APIC_LVT_MASKED) == 0 &&
+ ((lvt0 >> 8) & 0x7) == APIC_DM_EXTINT)))
+ return 1;
+
+ return 0;
+}
+
static uint32_t apic_get_current_count(APICState *s)
{
int64_t d;
uint32_t val;
- d = (qemu_get_clock(vm_clock) - s->initial_count_load_time) >>
+ d = (qemu_get_clock(vm_clock) - s->initial_count_load_time) >>
s->count_shift;
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
/* periodic */
- val = s->initial_count - (d % (s->initial_count + 1));
+ val = s->initial_count - (d % ((uint64_t)s->initial_count + 1));
} else {
if (d >= s->initial_count)
val = 0;
static void apic_timer_update(APICState *s, int64_t current_time)
{
int64_t next_time, d;
-
+
if (!(s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED)) {
- d = (current_time - s->initial_count_load_time) >>
+ d = (current_time - s->initial_count_load_time) >>
s->count_shift;
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
- d = ((d / (s->initial_count + 1)) + 1) * (s->initial_count + 1);
+ d = ((d / ((uint64_t)s->initial_count + 1)) + 1) * ((uint64_t)s->initial_count + 1);
} else {
if (d >= s->initial_count)
goto no_timer;
- d = s->initial_count + 1;
+ d = (uint64_t)s->initial_count + 1;
}
next_time = s->initial_count_load_time + (d << s->count_shift);
qemu_mod_timer(s->timer, next_time);
case 0x08:
val = s->tpr;
break;
+ case 0x09:
+ val = apic_get_arb_pri(s);
+ break;
case 0x0a:
/* ppr */
val = apic_get_ppr(s);
break;
+ case 0x0d:
+ val = s->log_dest << 24;
+ break;
+ case 0x0e:
+ val = s->dest_mode << 28;
+ break;
case 0x0f:
val = s->spurious_vec;
break;
case 0x28:
val = s->esr;
break;
- case 0x32 ... 0x37:
- val = s->lvt[index - 0x32];
- break;
case 0x30:
case 0x31:
val = s->icr[index & 1];
break;
+ case 0x32 ... 0x37:
+ val = s->lvt[index - 0x32];
+ break;
case 0x38:
val = s->initial_count;
break;
case 0x02:
s->id = (val >> 24);
break;
+ case 0x03:
+ break;
case 0x08:
s->tpr = val;
+ apic_update_irq(s);
+ break;
+ case 0x09:
+ case 0x0a:
break;
case 0x0b: /* EOI */
apic_eoi(s);
break;
+ case 0x0d:
+ s->log_dest = val >> 24;
+ break;
+ case 0x0e:
+ s->dest_mode = val >> 28;
+ break;
case 0x0f:
s->spurious_vec = val & 0x1ff;
+ apic_update_irq(s);
+ break;
+ case 0x10 ... 0x17:
+ case 0x18 ... 0x1f:
+ case 0x20 ... 0x27:
+ case 0x28:
break;
case 0x30:
+ s->icr[0] = val;
+ apic_deliver(s, (s->icr[1] >> 24) & 0xff, (s->icr[0] >> 11) & 1,
+ (s->icr[0] >> 8) & 7, (s->icr[0] & 0xff),
+ (s->icr[0] >> 14) & 1, (s->icr[0] >> 15) & 1);
+ break;
case 0x31:
- s->icr[index & 1] = val;
+ s->icr[1] = val;
break;
case 0x32 ... 0x37:
{
s->initial_count_load_time = qemu_get_clock(vm_clock);
apic_timer_update(s, s->initial_count_load_time);
break;
+ case 0x39:
+ break;
case 0x3e:
{
int v;
}
}
+static void apic_save(QEMUFile *f, void *opaque)
+{
+ APICState *s = opaque;
+ int i;
+
+ qemu_put_be32s(f, &s->apicbase);
+ qemu_put_8s(f, &s->id);
+ qemu_put_8s(f, &s->arb_id);
+ qemu_put_8s(f, &s->tpr);
+ qemu_put_be32s(f, &s->spurious_vec);
+ qemu_put_8s(f, &s->log_dest);
+ qemu_put_8s(f, &s->dest_mode);
+ for (i = 0; i < 8; i++) {
+ qemu_put_be32s(f, &s->isr[i]);
+ qemu_put_be32s(f, &s->tmr[i]);
+ qemu_put_be32s(f, &s->irr[i]);
+ }
+ for (i = 0; i < APIC_LVT_NB; i++) {
+ qemu_put_be32s(f, &s->lvt[i]);
+ }
+ qemu_put_be32s(f, &s->esr);
+ qemu_put_be32s(f, &s->icr[0]);
+ qemu_put_be32s(f, &s->icr[1]);
+ qemu_put_be32s(f, &s->divide_conf);
+ qemu_put_be32s(f, &s->count_shift);
+ qemu_put_be32s(f, &s->initial_count);
+ qemu_put_be64s(f, &s->initial_count_load_time);
+ qemu_put_be64s(f, &s->next_time);
+
+ qemu_put_timer(f, s->timer);
+}
+
+static int apic_load(QEMUFile *f, void *opaque, int version_id)
+{
+ APICState *s = opaque;
+ int i;
+
+ if (version_id > 2)
+ return -EINVAL;
+
+ /* XXX: what if the base changes? (registered memory regions) */
+ qemu_get_be32s(f, &s->apicbase);
+ qemu_get_8s(f, &s->id);
+ qemu_get_8s(f, &s->arb_id);
+ qemu_get_8s(f, &s->tpr);
+ qemu_get_be32s(f, &s->spurious_vec);
+ qemu_get_8s(f, &s->log_dest);
+ qemu_get_8s(f, &s->dest_mode);
+ for (i = 0; i < 8; i++) {
+ qemu_get_be32s(f, &s->isr[i]);
+ qemu_get_be32s(f, &s->tmr[i]);
+ qemu_get_be32s(f, &s->irr[i]);
+ }
+ for (i = 0; i < APIC_LVT_NB; i++) {
+ qemu_get_be32s(f, &s->lvt[i]);
+ }
+ qemu_get_be32s(f, &s->esr);
+ qemu_get_be32s(f, &s->icr[0]);
+ qemu_get_be32s(f, &s->icr[1]);
+ qemu_get_be32s(f, &s->divide_conf);
+ qemu_get_be32s(f, &s->count_shift);
+ qemu_get_be32s(f, &s->initial_count);
+ qemu_get_be64s(f, &s->initial_count_load_time);
+ qemu_get_be64s(f, &s->next_time);
+
+ if (version_id >= 2)
+ qemu_get_timer(f, s->timer);
+ return 0;
+}
+
+static void apic_reset(void *opaque)
+{
+ APICState *s = opaque;
+ apic_init_ipi(s);
+ /*
+ * LINT0 delivery mode is set to ExtInt at initialization time
+ * typically by BIOS, so PIC interrupt can be delivered to the
+ * processor when local APIC is enabled.
+ */
+ s->lvt[APIC_LVT_LINT0] = 0x700;
+}
static CPUReadMemoryFunc *apic_mem_read[3] = {
apic_mem_readb,
int apic_init(CPUState *env)
{
APICState *s;
- int i;
- s = malloc(sizeof(APICState));
+ if (last_apic_id >= MAX_APICS)
+ return -1;
+ s = qemu_mallocz(sizeof(APICState));
if (!s)
return -1;
- memset(s, 0, sizeof(*s));
env->apic_state = s;
+ apic_init_ipi(s);
+ s->id = last_apic_id++;
+ env->cpuid_apic_id = s->id;
s->cpu_env = env;
- s->apicbase = 0xfee00000 |
- MSR_IA32_APICBASE_BSP | MSR_IA32_APICBASE_ENABLE;
- for(i = 0; i < APIC_LVT_NB; i++)
- s->lvt[i] = 1 << 16; /* mask LVT */
- s->spurious_vec = 0xff;
+ s->apicbase = 0xfee00000 |
+ (s->id ? 0 : MSR_IA32_APICBASE_BSP) | MSR_IA32_APICBASE_ENABLE;
+
+ /*
+ * LINT0 delivery mode is set to ExtInt at initialization time
+ * typically by BIOS, so PIC interrupt can be delivered to the
+ * processor when local APIC is enabled.
+ */
+ s->lvt[APIC_LVT_LINT0] = 0x700;
+ /* XXX: mapping more APICs at the same memory location */
if (apic_io_memory == 0) {
/* NOTE: the APIC is directly connected to the CPU - it is not
on the global memory bus. */
- apic_io_memory = cpu_register_io_memory(0, apic_mem_read,
+ apic_io_memory = cpu_register_io_memory(0, apic_mem_read,
apic_mem_write, NULL);
- cpu_register_physical_memory(s->apicbase & ~0xfff, 0x1000, apic_io_memory);
+ cpu_register_physical_memory(s->apicbase & ~0xfff, 0x1000,
+ apic_io_memory);
}
s->timer = qemu_new_timer(vm_clock, apic_timer, s);
+
+ register_savevm("apic", s->id, 2, apic_save, apic_load, s);
+ qemu_register_reset(apic_reset, s);
+
+ local_apics[s->id] = s;
+ return 0;
+}
+
+static void ioapic_service(IOAPICState *s)
+{
+ uint8_t i;
+ uint8_t trig_mode;
+ uint8_t vector;
+ uint8_t delivery_mode;
+ uint32_t mask;
+ uint64_t entry;
+ uint8_t dest;
+ uint8_t dest_mode;
+ uint8_t polarity;
+ uint32_t deliver_bitmask[MAX_APIC_WORDS];
+
+ for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+ mask = 1 << i;
+ if (s->irr & mask) {
+ entry = s->ioredtbl[i];
+ if (!(entry & APIC_LVT_MASKED)) {
+ trig_mode = ((entry >> 15) & 1);
+ dest = entry >> 56;
+ dest_mode = (entry >> 11) & 1;
+ delivery_mode = (entry >> 8) & 7;
+ polarity = (entry >> 13) & 1;
+ if (trig_mode == APIC_TRIGGER_EDGE)
+ s->irr &= ~mask;
+ if (delivery_mode == APIC_DM_EXTINT)
+ vector = pic_read_irq(isa_pic);
+ else
+ vector = entry & 0xff;
+
+ apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
+ apic_bus_deliver(deliver_bitmask, delivery_mode,
+ vector, polarity, trig_mode);
+ }
+ }
+ }
+}
+
+void ioapic_set_irq(void *opaque, int vector, int level)
+{
+ IOAPICState *s = opaque;
+
+ if (vector >= 0 && vector < IOAPIC_NUM_PINS) {
+ uint32_t mask = 1 << vector;
+ uint64_t entry = s->ioredtbl[vector];
+
+ if ((entry >> 15) & 1) {
+ /* level triggered */
+ if (level) {
+ s->irr |= mask;
+ ioapic_service(s);
+ } else {
+ s->irr &= ~mask;
+ }
+ } else {
+ /* edge triggered */
+ if (level) {
+ s->irr |= mask;
+ ioapic_service(s);
+ }
+ }
+ }
+}
+
+static uint32_t ioapic_mem_readl(void *opaque, target_phys_addr_t addr)
+{
+ IOAPICState *s = opaque;
+ int index;
+ uint32_t val = 0;
+
+ addr &= 0xff;
+ if (addr == 0x00) {
+ val = s->ioregsel;
+ } else if (addr == 0x10) {
+ switch (s->ioregsel) {
+ case 0x00:
+ val = s->id << 24;
+ break;
+ case 0x01:
+ val = 0x11 | ((IOAPIC_NUM_PINS - 1) << 16); /* version 0x11 */
+ break;
+ case 0x02:
+ val = 0;
+ break;
+ default:
+ index = (s->ioregsel - 0x10) >> 1;
+ if (index >= 0 && index < IOAPIC_NUM_PINS) {
+ if (s->ioregsel & 1)
+ val = s->ioredtbl[index] >> 32;
+ else
+ val = s->ioredtbl[index] & 0xffffffff;
+ }
+ }
+#ifdef DEBUG_IOAPIC
+ printf("I/O APIC read: %08x = %08x\n", s->ioregsel, val);
+#endif
+ }
+ return val;
+}
+
+static void ioapic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+ IOAPICState *s = opaque;
+ int index;
+
+ addr &= 0xff;
+ if (addr == 0x00) {
+ s->ioregsel = val;
+ return;
+ } else if (addr == 0x10) {
+#ifdef DEBUG_IOAPIC
+ printf("I/O APIC write: %08x = %08x\n", s->ioregsel, val);
+#endif
+ switch (s->ioregsel) {
+ case 0x00:
+ s->id = (val >> 24) & 0xff;
+ return;
+ case 0x01:
+ case 0x02:
+ return;
+ default:
+ index = (s->ioregsel - 0x10) >> 1;
+ if (index >= 0 && index < IOAPIC_NUM_PINS) {
+ if (s->ioregsel & 1) {
+ s->ioredtbl[index] &= 0xffffffff;
+ s->ioredtbl[index] |= (uint64_t)val << 32;
+ } else {
+ s->ioredtbl[index] &= ~0xffffffffULL;
+ s->ioredtbl[index] |= val;
+ }
+ ioapic_service(s);
+ }
+ }
+ }
+}
+
+static void ioapic_save(QEMUFile *f, void *opaque)
+{
+ IOAPICState *s = opaque;
+ int i;
+
+ qemu_put_8s(f, &s->id);
+ qemu_put_8s(f, &s->ioregsel);
+ for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+ qemu_put_be64s(f, &s->ioredtbl[i]);
+ }
+}
+
+static int ioapic_load(QEMUFile *f, void *opaque, int version_id)
+{
+ IOAPICState *s = opaque;
+ int i;
+
+ if (version_id != 1)
+ return -EINVAL;
+
+ qemu_get_8s(f, &s->id);
+ qemu_get_8s(f, &s->ioregsel);
+ for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+ qemu_get_be64s(f, &s->ioredtbl[i]);
+ }
return 0;
}
+
+static void ioapic_reset(void *opaque)
+{
+ IOAPICState *s = opaque;
+ int i;
+
+ memset(s, 0, sizeof(*s));
+ for(i = 0; i < IOAPIC_NUM_PINS; i++)
+ s->ioredtbl[i] = 1 << 16; /* mask LVT */
+}
+
+static CPUReadMemoryFunc *ioapic_mem_read[3] = {
+ ioapic_mem_readl,
+ ioapic_mem_readl,
+ ioapic_mem_readl,
+};
+
+static CPUWriteMemoryFunc *ioapic_mem_write[3] = {
+ ioapic_mem_writel,
+ ioapic_mem_writel,
+ ioapic_mem_writel,
+};
+
+IOAPICState *ioapic_init(void)
+{
+ IOAPICState *s;
+ int io_memory;
+
+ s = qemu_mallocz(sizeof(IOAPICState));
+ if (!s)
+ return NULL;
+ ioapic_reset(s);
+ s->id = last_apic_id++;
+
+ io_memory = cpu_register_io_memory(0, ioapic_mem_read,
+ ioapic_mem_write, s);
+ cpu_register_physical_memory(0xfec00000, 0x1000, io_memory);
+
+ register_savevm("ioapic", 0, 1, ioapic_save, ioapic_load, s);
+ qemu_register_reset(ioapic_reset, s);
+
+ return s;
+}
projects / qemu / blobdiff