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qemu/hw/arm_gic.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

750 lines
22 KiB
C
Raw Blame History

/*
* ARM Generic/Distributed Interrupt Controller
*
* Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
*
* This code is licenced under the GPL.
*/
/* This file contains implementation code for the RealView EB interrupt
controller, MPCore distributed interrupt controller and ARMv7-M
Nested Vectored Interrupt Controller. */
//#define DEBUG_GIC
#ifdef DEBUG_GIC
#define DPRINTF(fmt, ...) \
do { printf("arm_gic: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#ifdef NVIC
static const uint8_t gic_id[] =
{ 0x00, 0xb0, 0x1b, 0x00, 0x0d, 0xe0, 0x05, 0xb1 };
/* The NVIC has 16 internal vectors. However these are not exposed
through the normal GIC interface. */
#define GIC_BASE_IRQ 32
#else
static const uint8_t gic_id[] =
{ 0x90, 0x13, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
#define GIC_BASE_IRQ 0
#endif
#define FROM_SYSBUSGIC(type, dev) \
DO_UPCAST(type, gic, FROM_SYSBUS(gic_state, dev))
typedef struct gic_irq_state
{
/* ??? The documentation seems to imply the enable bits are global, even
for per-cpu interrupts. This seems strange. */
unsigned enabled:1;
unsigned pending:NCPU;
unsigned active:NCPU;
unsigned level:NCPU;
unsigned model:1; /* 0 = N:N, 1 = 1:N */
unsigned trigger:1; /* nonzero = edge triggered. */
} gic_irq_state;
#define ALL_CPU_MASK ((1 << NCPU) - 1)
#if NCPU > 1
#define NUM_CPU(s) ((s)->num_cpu)
#else
#define NUM_CPU(s) 1
#endif
#define GIC_SET_ENABLED(irq) s->irq_state[irq].enabled = 1
#define GIC_CLEAR_ENABLED(irq) s->irq_state[irq].enabled = 0
#define GIC_TEST_ENABLED(irq) s->irq_state[irq].enabled
#define GIC_SET_PENDING(irq, cm) s->irq_state[irq].pending |= (cm)
#define GIC_CLEAR_PENDING(irq, cm) s->irq_state[irq].pending &= ~(cm)
#define GIC_TEST_PENDING(irq, cm) ((s->irq_state[irq].pending & (cm)) != 0)
#define GIC_SET_ACTIVE(irq, cm) s->irq_state[irq].active |= (cm)
#define GIC_CLEAR_ACTIVE(irq, cm) s->irq_state[irq].active &= ~(cm)
#define GIC_TEST_ACTIVE(irq, cm) ((s->irq_state[irq].active & (cm)) != 0)
#define GIC_SET_MODEL(irq) s->irq_state[irq].model = 1
#define GIC_CLEAR_MODEL(irq) s->irq_state[irq].model = 0
#define GIC_TEST_MODEL(irq) s->irq_state[irq].model
#define GIC_SET_LEVEL(irq, cm) s->irq_state[irq].level = (cm)
#define GIC_CLEAR_LEVEL(irq, cm) s->irq_state[irq].level &= ~(cm)
#define GIC_TEST_LEVEL(irq, cm) ((s->irq_state[irq].level & (cm)) != 0)
#define GIC_SET_TRIGGER(irq) s->irq_state[irq].trigger = 1
#define GIC_CLEAR_TRIGGER(irq) s->irq_state[irq].trigger = 0
#define GIC_TEST_TRIGGER(irq) s->irq_state[irq].trigger
#define GIC_GET_PRIORITY(irq, cpu) \
(((irq) < 32) ? s->priority1[irq][cpu] : s->priority2[(irq) - 32])
#ifdef NVIC
#define GIC_TARGET(irq) 1
#else
#define GIC_TARGET(irq) s->irq_target[irq]
#endif
typedef struct gic_state
{
SysBusDevice busdev;
qemu_irq parent_irq[NCPU];
int enabled;
int cpu_enabled[NCPU];
gic_irq_state irq_state[GIC_NIRQ];
#ifndef NVIC
int irq_target[GIC_NIRQ];
#endif
int priority1[32][NCPU];
int priority2[GIC_NIRQ - 32];
int last_active[GIC_NIRQ][NCPU];
int priority_mask[NCPU];
int running_irq[NCPU];
int running_priority[NCPU];
int current_pending[NCPU];
#if NCPU > 1
int num_cpu;
#endif
int iomemtype;
} gic_state;
/* TODO: Many places that call this routine could be optimized. */
/* Update interrupt status after enabled or pending bits have been changed. */
static void gic_update(gic_state *s)
{
int best_irq;
int best_prio;
int irq;
int level;
int cpu;
int cm;
for (cpu = 0; cpu < NUM_CPU(s); cpu++) {
cm = 1 << cpu;
s->current_pending[cpu] = 1023;
if (!s->enabled || !s->cpu_enabled[cpu]) {
qemu_irq_lower(s->parent_irq[cpu]);
return;
}
best_prio = 0x100;
best_irq = 1023;
for (irq = 0; irq < GIC_NIRQ; irq++) {
if (GIC_TEST_ENABLED(irq) && GIC_TEST_PENDING(irq, cm)) {
if (GIC_GET_PRIORITY(irq, cpu) < best_prio) {
best_prio = GIC_GET_PRIORITY(irq, cpu);
best_irq = irq;
}
}
}
level = 0;
if (best_prio <= s->priority_mask[cpu]) {
s->current_pending[cpu] = best_irq;
if (best_prio < s->running_priority[cpu]) {
DPRINTF("Raised pending IRQ %d\n", best_irq);
level = 1;
}
}
qemu_set_irq(s->parent_irq[cpu], level);
}
}
static void __attribute__((unused))
gic_set_pending_private(gic_state *s, int cpu, int irq)
{
int cm = 1 << cpu;
if (GIC_TEST_PENDING(irq, cm))
return;
DPRINTF("Set %d pending cpu %d\n", irq, cpu);
GIC_SET_PENDING(irq, cm);
gic_update(s);
}
/* Process a change in an external IRQ input. */
static void gic_set_irq(void *opaque, int irq, int level)
{
gic_state *s = (gic_state *)opaque;
/* The first external input line is internal interrupt 32. */
irq += 32;
if (level == GIC_TEST_LEVEL(irq, ALL_CPU_MASK))
return;
if (level) {
GIC_SET_LEVEL(irq, ALL_CPU_MASK);
if (GIC_TEST_TRIGGER(irq) || GIC_TEST_ENABLED(irq)) {
DPRINTF("Set %d pending mask %x\n", irq, GIC_TARGET(irq));
GIC_SET_PENDING(irq, GIC_TARGET(irq));
}
} else {
GIC_CLEAR_LEVEL(irq, ALL_CPU_MASK);
}
gic_update(s);
}
static void gic_set_running_irq(gic_state *s, int cpu, int irq)
{
s->running_irq[cpu] = irq;
if (irq == 1023) {
s->running_priority[cpu] = 0x100;
} else {
s->running_priority[cpu] = GIC_GET_PRIORITY(irq, cpu);
}
gic_update(s);
}
static uint32_t gic_acknowledge_irq(gic_state *s, int cpu)
{
int new_irq;
int cm = 1 << cpu;
new_irq = s->current_pending[cpu];
if (new_irq == 1023
|| GIC_GET_PRIORITY(new_irq, cpu) >= s->running_priority[cpu]) {
DPRINTF("ACK no pending IRQ\n");
return 1023;
}
s->last_active[new_irq][cpu] = s->running_irq[cpu];
/* Clear pending flags for both level and edge triggered interrupts.
Level triggered IRQs will be reasserted once they become inactive. */
GIC_CLEAR_PENDING(new_irq, GIC_TEST_MODEL(new_irq) ? ALL_CPU_MASK : cm);
gic_set_running_irq(s, cpu, new_irq);
DPRINTF("ACK %d\n", new_irq);
return new_irq;
}
static void gic_complete_irq(gic_state * s, int cpu, int irq)
{
int update = 0;
int cm = 1 << cpu;
DPRINTF("EOI %d\n", irq);
if (s->running_irq[cpu] == 1023)
return; /* No active IRQ. */
if (irq != 1023) {
/* Mark level triggered interrupts as pending if they are still
raised. */
if (!GIC_TEST_TRIGGER(irq) && GIC_TEST_ENABLED(irq)
&& GIC_TEST_LEVEL(irq, cm) && (GIC_TARGET(irq) & cm) != 0) {
DPRINTF("Set %d pending mask %x\n", irq, cm);
GIC_SET_PENDING(irq, cm);
update = 1;
}
}
if (irq != s->running_irq[cpu]) {
/* Complete an IRQ that is not currently running. */
int tmp = s->running_irq[cpu];
while (s->last_active[tmp][cpu] != 1023) {
if (s->last_active[tmp][cpu] == irq) {
s->last_active[tmp][cpu] = s->last_active[irq][cpu];
break;
}
tmp = s->last_active[tmp][cpu];
}
if (update) {
gic_update(s);
}
} else {
/* Complete the current running IRQ. */
gic_set_running_irq(s, cpu, s->last_active[s->running_irq[cpu]][cpu]);
}
}
static uint32_t gic_dist_readb(void *opaque, target_phys_addr_t offset)
{
gic_state *s = (gic_state *)opaque;
uint32_t res;
int irq;
int i;
int cpu;
int cm;
int mask;
cpu = gic_get_current_cpu();
cm = 1 << cpu;
if (offset < 0x100) {
#ifndef NVIC
if (offset == 0)
return s->enabled;
if (offset == 4)
return ((GIC_NIRQ / 32) - 1) | ((NUM_CPU(s) - 1) << 5);
if (offset < 0x08)
return 0;
#endif
goto bad_reg;
} else if (offset < 0x200) {
/* Interrupt Set/Clear Enable. */
if (offset < 0x180)
irq = (offset - 0x100) * 8;
else
irq = (offset - 0x180) * 8;
irq += GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
res = 0;
for (i = 0; i < 8; i++) {
if (GIC_TEST_ENABLED(irq + i)) {
res |= (1 << i);
}
}
} else if (offset < 0x300) {
/* Interrupt Set/Clear Pending. */
if (offset < 0x280)
irq = (offset - 0x200) * 8;
else
irq = (offset - 0x280) * 8;
irq += GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
res = 0;
mask = (irq < 32) ? cm : ALL_CPU_MASK;
for (i = 0; i < 8; i++) {
if (GIC_TEST_PENDING(irq + i, mask)) {
res |= (1 << i);
}
}
} else if (offset < 0x400) {
/* Interrupt Active. */
irq = (offset - 0x300) * 8 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
res = 0;
mask = (irq < 32) ? cm : ALL_CPU_MASK;
for (i = 0; i < 8; i++) {
if (GIC_TEST_ACTIVE(irq + i, mask)) {
res |= (1 << i);
}
}
} else if (offset < 0x800) {
/* Interrupt Priority. */
irq = (offset - 0x400) + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
res = GIC_GET_PRIORITY(irq, cpu);
#ifndef NVIC
} else if (offset < 0xc00) {
/* Interrupt CPU Target. */
irq = (offset - 0x800) + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq >= 29 && irq <= 31) {
res = cm;
} else {
res = GIC_TARGET(irq);
}
} else if (offset < 0xf00) {
/* Interrupt Configuration. */
irq = (offset - 0xc00) * 2 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
res = 0;
for (i = 0; i < 4; i++) {
if (GIC_TEST_MODEL(irq + i))
res |= (1 << (i * 2));
if (GIC_TEST_TRIGGER(irq + i))
res |= (2 << (i * 2));
}
#endif
} else if (offset < 0xfe0) {
goto bad_reg;
} else /* offset >= 0xfe0 */ {
if (offset & 3) {
res = 0;
} else {
res = gic_id[(offset - 0xfe0) >> 2];
}
}
return res;
bad_reg:
hw_error("gic_dist_readb: Bad offset %x\n", (int)offset);
return 0;
}
static uint32_t gic_dist_readw(void *opaque, target_phys_addr_t offset)
{
uint32_t val;
val = gic_dist_readb(opaque, offset);
val |= gic_dist_readb(opaque, offset + 1) << 8;
return val;
}
static uint32_t gic_dist_readl(void *opaque, target_phys_addr_t offset)
{
uint32_t val;
#ifdef NVIC
gic_state *s = (gic_state *)opaque;
uint32_t addr;
addr = offset;
if (addr < 0x100 || addr > 0xd00)
return nvic_readl(s, addr);
#endif
val = gic_dist_readw(opaque, offset);
val |= gic_dist_readw(opaque, offset + 2) << 16;
return val;
}
static void gic_dist_writeb(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
gic_state *s = (gic_state *)opaque;
int irq;
int i;
int cpu;
cpu = gic_get_current_cpu();
if (offset < 0x100) {
#ifdef NVIC
goto bad_reg;
#else
if (offset == 0) {
s->enabled = (value & 1);
DPRINTF("Distribution %sabled\n", s->enabled ? "En" : "Dis");
} else if (offset < 4) {
/* ignored. */
} else {
goto bad_reg;
}
#endif
} else if (offset < 0x180) {
/* Interrupt Set Enable. */
irq = (offset - 0x100) * 8 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq < 16)
value = 0xff;
for (i = 0; i < 8; i++) {
if (value & (1 << i)) {
int mask = (irq < 32) ? (1 << cpu) : GIC_TARGET(irq);
if (!GIC_TEST_ENABLED(irq + i))
DPRINTF("Enabled IRQ %d\n", irq + i);
GIC_SET_ENABLED(irq + i);
/* If a raised level triggered IRQ enabled then mark
is as pending. */
if (GIC_TEST_LEVEL(irq + i, mask)
&& !GIC_TEST_TRIGGER(irq + i)) {
DPRINTF("Set %d pending mask %x\n", irq + i, mask);
GIC_SET_PENDING(irq + i, mask);
}
}
}
} else if (offset < 0x200) {
/* Interrupt Clear Enable. */
irq = (offset - 0x180) * 8 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq < 16)
value = 0;
for (i = 0; i < 8; i++) {
if (value & (1 << i)) {
if (GIC_TEST_ENABLED(irq + i))
DPRINTF("Disabled IRQ %d\n", irq + i);
GIC_CLEAR_ENABLED(irq + i);
}
}
} else if (offset < 0x280) {
/* Interrupt Set Pending. */
irq = (offset - 0x200) * 8 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq < 16)
irq = 0;
for (i = 0; i < 8; i++) {
if (value & (1 << i)) {
GIC_SET_PENDING(irq + i, GIC_TARGET(irq));
}
}
} else if (offset < 0x300) {
/* Interrupt Clear Pending. */
irq = (offset - 0x280) * 8 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
for (i = 0; i < 8; i++) {
/* ??? This currently clears the pending bit for all CPUs, even
for per-CPU interrupts. It's unclear whether this is the
corect behavior. */
if (value & (1 << i)) {
GIC_CLEAR_PENDING(irq + i, ALL_CPU_MASK);
}
}
} else if (offset < 0x400) {
/* Interrupt Active. */
goto bad_reg;
} else if (offset < 0x800) {
/* Interrupt Priority. */
irq = (offset - 0x400) + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq < 32) {
s->priority1[irq][cpu] = value;
} else {
s->priority2[irq - 32] = value;
}
#ifndef NVIC
} else if (offset < 0xc00) {
/* Interrupt CPU Target. */
irq = (offset - 0x800) + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq < 29)
value = 0;
else if (irq < 32)
value = ALL_CPU_MASK;
s->irq_target[irq] = value & ALL_CPU_MASK;
} else if (offset < 0xf00) {
/* Interrupt Configuration. */
irq = (offset - 0xc00) * 4 + GIC_BASE_IRQ;
if (irq >= GIC_NIRQ)
goto bad_reg;
if (irq < 32)
value |= 0xaa;
for (i = 0; i < 4; i++) {
if (value & (1 << (i * 2))) {
GIC_SET_MODEL(irq + i);
} else {
GIC_CLEAR_MODEL(irq + i);
}
if (value & (2 << (i * 2))) {
GIC_SET_TRIGGER(irq + i);
} else {
GIC_CLEAR_TRIGGER(irq + i);
}
}
#endif
} else {
/* 0xf00 is only handled for 32-bit writes. */
goto bad_reg;
}
gic_update(s);
return;
bad_reg:
hw_error("gic_dist_writeb: Bad offset %x\n", (int)offset);
}
static void gic_dist_writew(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
gic_dist_writeb(opaque, offset, value & 0xff);
gic_dist_writeb(opaque, offset + 1, value >> 8);
}
static void gic_dist_writel(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
gic_state *s = (gic_state *)opaque;
#ifdef NVIC
uint32_t addr;
addr = offset;
if (addr < 0x100 || (addr > 0xd00 && addr != 0xf00)) {
nvic_writel(s, addr, value);
return;
}
#endif
if (offset == 0xf00) {
int cpu;
int irq;
int mask;
cpu = gic_get_current_cpu();
irq = value & 0x3ff;
switch ((value >> 24) & 3) {
case 0:
mask = (value >> 16) & ALL_CPU_MASK;
break;
case 1:
mask = 1 << cpu;
break;
case 2:
mask = ALL_CPU_MASK ^ (1 << cpu);
break;
default:
DPRINTF("Bad Soft Int target filter\n");
mask = ALL_CPU_MASK;
break;
}
GIC_SET_PENDING(irq, mask);
gic_update(s);
return;
}
gic_dist_writew(opaque, offset, value & 0xffff);
gic_dist_writew(opaque, offset + 2, value >> 16);
}
static CPUReadMemoryFunc * const gic_dist_readfn[] = {
gic_dist_readb,
gic_dist_readw,
gic_dist_readl
};
static CPUWriteMemoryFunc * const gic_dist_writefn[] = {
gic_dist_writeb,
gic_dist_writew,
gic_dist_writel
};
#ifndef NVIC
static uint32_t gic_cpu_read(gic_state *s, int cpu, int offset)
{
switch (offset) {
case 0x00: /* Control */
return s->cpu_enabled[cpu];
case 0x04: /* Priority mask */
return s->priority_mask[cpu];
case 0x08: /* Binary Point */
/* ??? Not implemented. */
return 0;
case 0x0c: /* Acknowledge */
return gic_acknowledge_irq(s, cpu);
case 0x14: /* Runing Priority */
return s->running_priority[cpu];
case 0x18: /* Highest Pending Interrupt */
return s->current_pending[cpu];
default:
hw_error("gic_cpu_read: Bad offset %x\n", (int)offset);
return 0;
}
}
static void gic_cpu_write(gic_state *s, int cpu, int offset, uint32_t value)
{
switch (offset) {
case 0x00: /* Control */
s->cpu_enabled[cpu] = (value & 1);
DPRINTF("CPU %d %sabled\n", cpu, s->cpu_enabled ? "En" : "Dis");
break;
case 0x04: /* Priority mask */
s->priority_mask[cpu] = (value & 0xff);
break;
case 0x08: /* Binary Point */
/* ??? Not implemented. */
break;
case 0x10: /* End Of Interrupt */
return gic_complete_irq(s, cpu, value & 0x3ff);
default:
hw_error("gic_cpu_write: Bad offset %x\n", (int)offset);
return;
}
gic_update(s);
}
#endif
static void gic_reset(gic_state *s)
{
int i;
memset(s->irq_state, 0, GIC_NIRQ * sizeof(gic_irq_state));
for (i = 0 ; i < NUM_CPU(s); i++) {
s->priority_mask[i] = 0xf0;
s->current_pending[i] = 1023;
s->running_irq[i] = 1023;
s->running_priority[i] = 0x100;
#ifdef NVIC
/* The NVIC doesn't have per-cpu interfaces, so enable by default. */
s->cpu_enabled[i] = 1;
#else
s->cpu_enabled[i] = 0;
#endif
}
for (i = 0; i < 16; i++) {
GIC_SET_ENABLED(i);
GIC_SET_TRIGGER(i);
}
#ifdef NVIC
/* The NVIC is always enabled. */
s->enabled = 1;
#else
s->enabled = 0;
#endif
}
static void gic_save(QEMUFile *f, void *opaque)
{
gic_state *s = (gic_state *)opaque;
int i;
int j;
qemu_put_be32(f, s->enabled);
for (i = 0; i < NUM_CPU(s); i++) {
qemu_put_be32(f, s->cpu_enabled[i]);
#ifndef NVIC
qemu_put_be32(f, s->irq_target[i]);
#endif
for (j = 0; j < 32; j++)
qemu_put_be32(f, s->priority1[j][i]);
for (j = 0; j < GIC_NIRQ; j++)
qemu_put_be32(f, s->last_active[j][i]);
qemu_put_be32(f, s->priority_mask[i]);
qemu_put_be32(f, s->running_irq[i]);
qemu_put_be32(f, s->running_priority[i]);
qemu_put_be32(f, s->current_pending[i]);
}
for (i = 0; i < GIC_NIRQ - 32; i++) {
qemu_put_be32(f, s->priority2[i]);
}
for (i = 0; i < GIC_NIRQ; i++) {
qemu_put_byte(f, s->irq_state[i].enabled);
qemu_put_byte(f, s->irq_state[i].pending);
qemu_put_byte(f, s->irq_state[i].active);
qemu_put_byte(f, s->irq_state[i].level);
qemu_put_byte(f, s->irq_state[i].model);
qemu_put_byte(f, s->irq_state[i].trigger);
}
}
static int gic_load(QEMUFile *f, void *opaque, int version_id)
{
gic_state *s = (gic_state *)opaque;
int i;
int j;
if (version_id != 1)
return -EINVAL;
s->enabled = qemu_get_be32(f);
for (i = 0; i < NUM_CPU(s); i++) {
s->cpu_enabled[i] = qemu_get_be32(f);
#ifndef NVIC
s->irq_target[i] = qemu_get_be32(f);
#endif
for (j = 0; j < 32; j++)
s->priority1[j][i] = qemu_get_be32(f);
for (j = 0; j < GIC_NIRQ; j++)
s->last_active[j][i] = qemu_get_be32(f);
s->priority_mask[i] = qemu_get_be32(f);
s->running_irq[i] = qemu_get_be32(f);
s->running_priority[i] = qemu_get_be32(f);
s->current_pending[i] = qemu_get_be32(f);
}
for (i = 0; i < GIC_NIRQ - 32; i++) {
s->priority2[i] = qemu_get_be32(f);
}
for (i = 0; i < GIC_NIRQ; i++) {
s->irq_state[i].enabled = qemu_get_byte(f);
s->irq_state[i].pending = qemu_get_byte(f);
s->irq_state[i].active = qemu_get_byte(f);
s->irq_state[i].level = qemu_get_byte(f);
s->irq_state[i].model = qemu_get_byte(f);
s->irq_state[i].trigger = qemu_get_byte(f);
}
return 0;
}
#if NCPU > 1
static void gic_init(gic_state *s, int num_cpu)
#else
static void gic_init(gic_state *s)
#endif
{
int i;
#if NCPU > 1
s->num_cpu = num_cpu;
#endif
qdev_init_gpio_in(&s->busdev.qdev, gic_set_irq, GIC_NIRQ - 32);
for (i = 0; i < NUM_CPU(s); i++) {
sysbus_init_irq(&s->busdev, &s->parent_irq[i]);
}
s->iomemtype = cpu_register_io_memory(gic_dist_readfn,
gic_dist_writefn, s,
DEVICE_NATIVE_ENDIAN);
gic_reset(s);
register_savevm(NULL, "arm_gic", -1, 1, gic_save, gic_load, s);
}
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