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qemu/hw/apic.c
Glauber Costa c169998802 v3: don't call reset functions on cpu initialization 
There is absolutely no need to call reset functions when initializing
devices. Since we are already registering them, calling qemu_system_reset()
should suffice. Actually, it is what happens when we reboot the machine,
and using the same process instead of a special case semantics will even
allow us to find bugs easier.

Furthermore, the fact that we initialize things like the cpu quite early,
leads to the need to introduce synchronization stuff like qemu_system_cond.
This patch removes it entirely. All we need to do is call qemu_system_reset()
only when we're already sure the system is up and running

I tested it with qemu (with and without io-thread) and qemu-kvm, and it
seems to be doing okay - although qemu-kvm uses a slightly different patch.

[ v2: user mode still needs cpu_reset, so put it in ifdef. ]
[ v3: leave qemu_system_cond for now. ]

Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2009-11-07 08:06:58 +00:00

1004 lines
26 KiB
C
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/*
* APIC support
*
* Copyright (c) 2004-2005 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
#include "hw.h"
#include "pc.h"
#include "pci.h"
#include "msix.h"
#include "qemu-timer.h"
#include "host-utils.h"
#include "kvm.h"
//#define DEBUG_APIC
/* APIC Local Vector Table */
#define APIC_LVT_TIMER 0
#define APIC_LVT_THERMAL 1
#define APIC_LVT_PERFORM 2
#define APIC_LVT_LINT0 3
#define APIC_LVT_LINT1 4
#define APIC_LVT_ERROR 5
#define APIC_LVT_NB 6
/* APIC delivery modes */
#define APIC_DM_FIXED 0
#define APIC_DM_LOWPRI 1
#define APIC_DM_SMI 2
#define APIC_DM_NMI 4
#define APIC_DM_INIT 5
#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_LVT_TIMER_PERIODIC (1<<17)
#define APIC_LVT_MASKED (1<<16)
#define APIC_LVT_LEVEL_TRIGGER (1<<15)
#define APIC_LVT_REMOTE_IRR (1<<14)
#define APIC_INPUT_POLARITY (1<<13)
#define APIC_SEND_PENDING (1<<12)
#define ESR_ILLEGAL_ADDRESS (1 << 7)
#define APIC_SV_ENABLE (1 << 8)
#define MAX_APICS 255
#define MAX_APIC_WORDS 8
/* Intel APIC constants: from include/asm/msidef.h */
#define MSI_DATA_VECTOR_SHIFT 0
#define MSI_DATA_VECTOR_MASK 0x000000ff
#define MSI_DATA_DELIVERY_MODE_SHIFT 8
#define MSI_DATA_TRIGGER_SHIFT 15
#define MSI_DATA_LEVEL_SHIFT 14
#define MSI_ADDR_DEST_MODE_SHIFT 2
#define MSI_ADDR_DEST_ID_SHIFT 12
#define MSI_ADDR_DEST_ID_MASK 0x00ffff0
#define MSI_ADDR_BASE 0xfee00000
#define MSI_ADDR_SIZE 0x100000
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 */
uint32_t lvt[APIC_LVT_NB];
uint32_t esr; /* error register */
uint32_t icr[2];
uint32_t divide_conf;
int count_shift;
uint32_t initial_count;
int64_t initial_count_load_time, next_time;
uint32_t idx;
QEMUTimer *timer;
int sipi_vector;
int wait_for_sipi;
} APICState;
static int apic_io_memory;
static APICState *local_apics[MAX_APICS + 1];
static int last_apic_idx = 0;
static int apic_irq_delivered;
static void apic_set_irq(APICState *s, int vector_num, int trigger_mode);
static void apic_update_irq(APICState *s);
static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask,
uint8_t dest, uint8_t dest_mode);
/* Find first bit starting from msb */
static int fls_bit(uint32_t value)
{
return 31 - clz32(value);
}
/* Find first bit starting from lsb */
static int ffs_bit(uint32_t value)
{
return ctz32(value);
}
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 inline int get_bit(uint32_t *tab, int index)
{
int i, mask;
i = index >> 5;
mask = 1 << (index & 0x1f);
return !!(tab[i] & mask);
}
static void apic_local_deliver(CPUState *env, int vector)
{
APICState *s = env->apic_state;
uint32_t lvt = s->lvt[vector];
int trigger_mode;
if (lvt & APIC_LVT_MASKED)
return;
switch ((lvt >> 8) & 7) {
case APIC_DM_SMI:
cpu_interrupt(env, CPU_INTERRUPT_SMI);
break;
case APIC_DM_NMI:
cpu_interrupt(env, CPU_INTERRUPT_NMI);
break;
case APIC_DM_EXTINT:
cpu_interrupt(env, CPU_INTERRUPT_HARD);
break;
case APIC_DM_FIXED:
trigger_mode = APIC_TRIGGER_EDGE;
if ((vector == APIC_LVT_LINT0 || vector == APIC_LVT_LINT1) &&
(lvt & APIC_LVT_LEVEL_TRIGGER))
trigger_mode = APIC_TRIGGER_LEVEL;
apic_set_irq(s, lvt & 0xff, trigger_mode);
}
}
void apic_deliver_pic_intr(CPUState *env, int level)
{
if (level)
apic_local_deliver(env, APIC_LVT_LINT0);
else {
APICState *s = env->apic_state;
uint32_t lvt = s->lvt[APIC_LVT_LINT0];
switch ((lvt >> 8) & 7) {
case APIC_DM_FIXED:
if (!(lvt & APIC_LVT_LEVEL_TRIGGER))
break;
reset_bit(s->irr, lvt & 0xff);
/* fall through */
case APIC_DM_EXTINT:
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
break;
}
}
}
#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:
foreach_apic(apic_iter, deliver_bitmask,
cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_SMI) );
return;
case APIC_DM_NMI:
foreach_apic(apic_iter, deliver_bitmask,
cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_NMI) );
return;
case APIC_DM_INIT:
/* normal INIT IPI sent to processors */
foreach_apic(apic_iter, deliver_bitmask,
cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_INIT) );
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 apic_deliver_irq(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];
apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode);
apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, polarity,
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: %016" PRIx64 "\n", val);
#endif
if (!s)
return;
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)) {
s->apicbase &= ~MSR_IA32_APICBASE_ENABLE;
env->cpuid_features &= ~CPUID_APIC;
s->spurious_vec &= ~APIC_SV_ENABLE;
}
}
uint64_t cpu_get_apic_base(CPUState *env)
{
APICState *s = env->apic_state;
#ifdef DEBUG_APIC
printf("cpu_get_apic_base: %016" PRIx64 "\n",
s ? (uint64_t)s->apicbase: 0);
#endif
return s ? s->apicbase : 0;
}
void cpu_set_apic_tpr(CPUX86State *env, uint8_t val)
{
APICState *s = env->apic_state;
if (!s)
return;
s->tpr = (val & 0x0f) << 4;
apic_update_irq(s);
}
uint8_t cpu_get_apic_tpr(CPUX86State *env)
{
APICState *s = env->apic_state;
return s ? s->tpr >> 4 : 0;
}
/* return -1 if no bit is set */
static int get_highest_priority_int(uint32_t *tab)
{
int i;
for(i = 7; i >= 0; i--) {
if (tab[i] != 0) {
return i * 32 + fls_bit(tab[i]);
}
}
return -1;
}
static int apic_get_ppr(APICState *s)
{
int tpr, isrv, ppr;
tpr = (s->tpr >> 4);
isrv = get_highest_priority_int(s->isr);
if (isrv < 0)
isrv = 0;
isrv >>= 4;
if (tpr >= isrv)
ppr = s->tpr;
else
ppr = isrv << 4;
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, ppr;
if (!(s->spurious_vec & APIC_SV_ENABLE))
return;
irrv = get_highest_priority_int(s->irr);
if (irrv < 0)
return;
ppr = apic_get_ppr(s);
if (ppr && (irrv & 0xf0) <= (ppr & 0xf0))
return;
cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
}
void apic_reset_irq_delivered(void)
{
apic_irq_delivered = 0;
}
int apic_get_irq_delivered(void)
{
return apic_irq_delivered;
}
static void apic_set_irq(APICState *s, int vector_num, int trigger_mode)
{
apic_irq_delivered += !get_bit(s->irr, vector_num);
set_bit(s->irr, vector_num);
if (trigger_mode)
set_bit(s->tmr, vector_num);
else
reset_bit(s->tmr, vector_num);
apic_update_irq(s);
}
static void apic_eoi(APICState *s)
{
int isrv;
isrv = get_highest_priority_int(s->isr);
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 int apic_find_dest(uint8_t dest)
{
APICState *apic = local_apics[dest];
int i;
if (apic && apic->id == dest)
return dest; /* shortcut in case apic->id == apic->idx */
for (i = 0; i < MAX_APICS; i++) {
apic = local_apics[i];
if (apic && apic->id == dest)
return i;
}
return -1;
}
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 {
int idx = apic_find_dest(dest);
memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t));
if (idx >= 0)
set_bit(deliver_bitmask, idx);
}
} 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);
}
}
}
}
}
}
void apic_init_reset(CPUState *env)
{
APICState *s = env->apic_state;
int i;
if (!s)
return;
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;
s->wait_for_sipi = 1;
env->halted = !(s->apicbase & MSR_IA32_APICBASE_BSP);
}
static void apic_startup(APICState *s, int vector_num)
{
s->sipi_vector = vector_num;
cpu_interrupt(s->cpu_env, CPU_INTERRUPT_SIPI);
}
void apic_sipi(CPUState *env)
{
APICState *s = env->apic_state;
cpu_reset_interrupt(env, CPU_INTERRUPT_SIPI);
if (!s->wait_for_sipi)
return;
env->eip = 0;
cpu_x86_load_seg_cache(env, R_CS, s->sipi_vector << 8, s->sipi_vector << 12,
env->segs[R_CS].limit, env->segs[R_CS].flags);
env->halted = 0;
s->wait_for_sipi = 0;
}
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->idx);
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->idx);
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;
int intno;
/* if the APIC is installed or enabled, we let the 8259 handle the
IRQs */
if (!s)
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->apicbase & MSR_IA32_APICBASE_ENABLE) == 0 ||
(lvt0 & APIC_LVT_MASKED) == 0)
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) >>
s->count_shift;
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
/* periodic */
val = s->initial_count - (d % ((uint64_t)s->initial_count + 1));
} else {
if (d >= s->initial_count)
val = 0;
else
val = s->initial_count - d;
}
return val;
}
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) >>
s->count_shift;
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
if (!s->initial_count)
goto no_timer;
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 = (uint64_t)s->initial_count + 1;
}
next_time = s->initial_count_load_time + (d << s->count_shift);
qemu_mod_timer(s->timer, next_time);
s->next_time = next_time;
} else {
no_timer:
qemu_del_timer(s->timer);
}
}
static void apic_timer(void *opaque)
{
APICState *s = opaque;
apic_local_deliver(s->cpu_env, APIC_LVT_TIMER);
apic_timer_update(s, s->next_time);
}
static uint32_t apic_mem_readb(void *opaque, target_phys_addr_t addr)
{
return 0;
}
static uint32_t apic_mem_readw(void *opaque, target_phys_addr_t addr)
{
return 0;
}
static void apic_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
}
static void apic_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
}
static uint32_t apic_mem_readl(void *opaque, target_phys_addr_t addr)
{
CPUState *env;
APICState *s;
uint32_t val;
int index;
env = cpu_single_env;
if (!env)
return 0;
s = env->apic_state;
index = (addr >> 4) & 0xff;
switch(index) {
case 0x02: /* id */
val = s->id << 24;
break;
case 0x03: /* version */
val = 0x11 | ((APIC_LVT_NB - 1) << 16); /* version 0x11 */
break;
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 0x0b:
val = 0;
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 0x10 ... 0x17:
val = s->isr[index & 7];
break;
case 0x18 ... 0x1f:
val = s->tmr[index & 7];
break;
case 0x20 ... 0x27:
val = s->irr[index & 7];
break;
case 0x28:
val = s->esr;
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 0x39:
val = apic_get_current_count(s);
break;
case 0x3e:
val = s->divide_conf;
break;
default:
s->esr |= ESR_ILLEGAL_ADDRESS;
val = 0;
break;
}
#ifdef DEBUG_APIC
printf("APIC read: %08x = %08x\n", (uint32_t)addr, val);
#endif
return val;
}
static void apic_send_msi(target_phys_addr_t addr, uint32 data)
{
uint8_t dest = (addr & MSI_ADDR_DEST_ID_MASK) >> MSI_ADDR_DEST_ID_SHIFT;
uint8_t vector = (data & MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
uint8_t dest_mode = (addr >> MSI_ADDR_DEST_MODE_SHIFT) & 0x1;
uint8_t trigger_mode = (data >> MSI_DATA_TRIGGER_SHIFT) & 0x1;
uint8_t delivery = (data >> MSI_DATA_DELIVERY_MODE_SHIFT) & 0x7;
/* XXX: Ignore redirection hint. */
apic_deliver_irq(dest, dest_mode, delivery, vector, 0, trigger_mode);
}
static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
CPUState *env;
APICState *s;
int index = (addr >> 4) & 0xff;
if (addr > 0xfff || !index) {
/* MSI and MMIO APIC are at the same memory location,
* but actually not on the global bus: MSI is on PCI bus
* APIC is connected directly to the CPU.
* Mapping them on the global bus happens to work because
* MSI registers are reserved in APIC MMIO and vice versa. */
apic_send_msi(addr, val);
return;
}
env = cpu_single_env;
if (!env)
return;
s = env->apic_state;
#ifdef DEBUG_APIC
printf("APIC write: %08x = %08x\n", (uint32_t)addr, val);
#endif
switch(index) {
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[1] = val;
break;
case 0x32 ... 0x37:
{
int n = index - 0x32;
s->lvt[n] = val;
if (n == APIC_LVT_TIMER)
apic_timer_update(s, qemu_get_clock(vm_clock));
}
break;
case 0x38:
s->initial_count = val;
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;
s->divide_conf = val & 0xb;
v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4);
s->count_shift = (v + 1) & 7;
}
break;
default:
s->esr |= ESR_ILLEGAL_ADDRESS;
break;
}
}
/* This function is only used for old state version 1 and 2 */
static int apic_load_old(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);
s->count_shift=qemu_get_be32(f);
qemu_get_be32s(f, &s->initial_count);
s->initial_count_load_time=qemu_get_be64(f);
s->next_time=qemu_get_be64(f);
if (version_id >= 2)
qemu_get_timer(f, s->timer);
return 0;
}
static const VMStateDescription vmstate_apic = {
.name = "apic",
.version_id = 3,
.minimum_version_id = 3,
.minimum_version_id_old = 1,
.load_state_old = apic_load_old,
.fields = (VMStateField []) {
VMSTATE_UINT32(apicbase, APICState),
VMSTATE_UINT8(id, APICState),
VMSTATE_UINT8(arb_id, APICState),
VMSTATE_UINT8(tpr, APICState),
VMSTATE_UINT32(spurious_vec, APICState),
VMSTATE_UINT8(log_dest, APICState),
VMSTATE_UINT8(dest_mode, APICState),
VMSTATE_UINT32_ARRAY(isr, APICState, 8),
VMSTATE_UINT32_ARRAY(tmr, APICState, 8),
VMSTATE_UINT32_ARRAY(irr, APICState, 8),
VMSTATE_UINT32_ARRAY(lvt, APICState, APIC_LVT_NB),
VMSTATE_UINT32(esr, APICState),
VMSTATE_UINT32_ARRAY(icr, APICState, 2),
VMSTATE_UINT32(divide_conf, APICState),
VMSTATE_INT32(count_shift, APICState),
VMSTATE_UINT32(initial_count, APICState),
VMSTATE_INT64(initial_count_load_time, APICState),
VMSTATE_INT64(next_time, APICState),
VMSTATE_TIMER(timer, APICState),
VMSTATE_END_OF_LIST()
}
};
static void apic_reset(void *opaque)
{
APICState *s = opaque;
int bsp;
cpu_synchronize_state(s->cpu_env);
bsp = cpu_is_bsp(s->cpu_env);
s->apicbase = 0xfee00000 |
(bsp ? MSR_IA32_APICBASE_BSP : 0) | MSR_IA32_APICBASE_ENABLE;
cpu_reset(s->cpu_env);
apic_init_reset(s->cpu_env);
if (bsp) {
/*
* LINT0 delivery mode on CPU #0 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 * const apic_mem_read[3] = {
apic_mem_readb,
apic_mem_readw,
apic_mem_readl,
};
static CPUWriteMemoryFunc * const apic_mem_write[3] = {
apic_mem_writeb,
apic_mem_writew,
apic_mem_writel,
};
int apic_init(CPUState *env)
{
APICState *s;
if (last_apic_idx >= MAX_APICS)
return -1;
s = qemu_mallocz(sizeof(APICState));
env->apic_state = s;
s->idx = last_apic_idx++;
s->id = env->cpuid_apic_id;
s->cpu_env = env;
msix_supported = 1;
/* 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(apic_mem_read,
apic_mem_write, NULL);
/* XXX: what if the base changes? */
cpu_register_physical_memory(MSI_ADDR_BASE, MSI_ADDR_SIZE,
apic_io_memory);
}
s->timer = qemu_new_timer(vm_clock, apic_timer, s);
vmstate_register(s->idx, &vmstate_apic, s);
qemu_register_reset(apic_reset, s);
local_apics[s->idx] = s;
return 0;
}
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