*/
/* This file contains implementation code for the RealView EB interrupt
- controller, MPCore distributed interrupt controller and ARMv7-M
- Nested Vectored Interrupt Controller. */
+ * controller, MPCore distributed interrupt controller and ARMv7-M
+ * Nested Vectored Interrupt Controller.
+ * It is compiled in two ways:
+ * (1) as a standalone file to produce a sysbus device which is a GIC
+ * that can be used on the realview board and as one of the builtin
+ * private peripherals for the ARM MP CPUs (11MPCore, A9, etc)
+ * (2) by being directly #included into armv7m_nvic.c to produce the
+ * armv7m_nvic device.
+ */
+
+#include "sysbus.h"
+#include "arm_gic_internal.h"
//#define DEBUG_GIC
#ifdef DEBUG_GIC
#define DPRINTF(fmt, ...) \
-do { printf("arm_gic: " fmt , ## __VA_ARGS__); } while (0)
+do { fprintf(stderr, "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))
+static const uint8_t gic_id[] = {
+ 0x90, 0x13, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1
+};
-typedef struct gic_irq_state
-{
- /* The enable bits are only banked for per-cpu interrupts. */
- unsigned enabled:NCPU;
- 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, cm) s->irq_state[irq].enabled |= (cm)
-#define GIC_CLEAR_ENABLED(irq, cm) s->irq_state[irq].enabled &= ~(cm)
-#define GIC_TEST_ENABLED(irq, cm) ((s->irq_state[irq].enabled & (cm)) != 0)
-#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
+static inline int gic_get_current_cpu(GICState *s)
{
- 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
-
- MemoryRegion iomem;
-} gic_state;
+ if (s->num_cpu > 1) {
+ return cpu_single_env->cpu_index;
+ }
+ return 0;
+}
/* 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)
+void gic_update(GICState *s)
{
int best_irq;
int best_prio;
cm = 1 << cpu;
s->current_pending[cpu] = 1023;
if (!s->enabled || !s->cpu_enabled[cpu]) {
- qemu_irq_lower(s->parent_irq[cpu]);
+ qemu_irq_lower(s->parent_irq[cpu]);
return;
}
best_prio = 0x100;
best_irq = 1023;
- for (irq = 0; irq < GIC_NIRQ; irq++) {
+ for (irq = 0; irq < s->num_irq; irq++) {
if (GIC_TEST_ENABLED(irq, cm) && GIC_TEST_PENDING(irq, cm)) {
if (GIC_GET_PRIORITY(irq, cpu) < best_prio) {
best_prio = GIC_GET_PRIORITY(irq, cpu);
}
}
level = 0;
- if (best_prio <= s->priority_mask[cpu]) {
+ 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);
}
}
-static void __attribute__((unused))
-gic_set_pending_private(gic_state *s, int cpu, int irq)
+void gic_set_pending_private(GICState *s, int cpu, int irq)
{
int cm = 1 << cpu;
/* 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))
+ /* Meaning of the 'irq' parameter:
+ * [0..N-1] : external interrupts
+ * [N..N+31] : PPI (internal) interrupts for CPU 0
+ * [N+32..N+63] : PPI (internal interrupts for CPU 1
+ * ...
+ */
+ GICState *s = (GICState *)opaque;
+ int cm, target;
+ if (irq < (s->num_irq - GIC_INTERNAL)) {
+ /* The first external input line is internal interrupt 32. */
+ cm = ALL_CPU_MASK;
+ irq += GIC_INTERNAL;
+ target = GIC_TARGET(irq);
+ } else {
+ int cpu;
+ irq -= (s->num_irq - GIC_INTERNAL);
+ cpu = irq / GIC_INTERNAL;
+ irq %= GIC_INTERNAL;
+ cm = 1 << cpu;
+ target = cm;
+ }
+
+ if (level == GIC_TEST_LEVEL(irq, cm)) {
return;
+ }
if (level) {
- GIC_SET_LEVEL(irq, ALL_CPU_MASK);
- if (GIC_TEST_TRIGGER(irq) || GIC_TEST_ENABLED(irq, ALL_CPU_MASK)) {
- DPRINTF("Set %d pending mask %x\n", irq, GIC_TARGET(irq));
- GIC_SET_PENDING(irq, GIC_TARGET(irq));
+ GIC_SET_LEVEL(irq, cm);
+ if (GIC_TEST_TRIGGER(irq) || GIC_TEST_ENABLED(irq, cm)) {
+ DPRINTF("Set %d pending mask %x\n", irq, target);
+ GIC_SET_PENDING(irq, target);
}
} else {
- GIC_CLEAR_LEVEL(irq, ALL_CPU_MASK);
+ GIC_CLEAR_LEVEL(irq, cm);
}
gic_update(s);
}
-static void gic_set_running_irq(gic_state *s, int cpu, int irq)
+static void gic_set_running_irq(GICState *s, int cpu, int irq)
{
s->running_irq[cpu] = irq;
if (irq == 1023) {
gic_update(s);
}
-static uint32_t gic_acknowledge_irq(gic_state *s, int cpu)
+uint32_t gic_acknowledge_irq(GICState *s, int cpu)
{
int new_irq;
int cm = 1 << cpu;
return new_irq;
}
-static void gic_complete_irq(gic_state * s, int cpu, int irq)
+void gic_complete_irq(GICState *s, int cpu, int irq)
{
int update = 0;
int cm = 1 << cpu;
DPRINTF("EOI %d\n", irq);
+ if (irq >= s->num_irq) {
+ /* This handles two cases:
+ * 1. If software writes the ID of a spurious interrupt [ie 1023]
+ * to the GICC_EOIR, the GIC ignores that write.
+ * 2. If software writes the number of a non-existent interrupt
+ * this must be a subcase of "value written does not match the last
+ * valid interrupt value read from the Interrupt Acknowledge
+ * register" and so this is UNPREDICTABLE. We choose to ignore it.
+ */
+ return;
+ }
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, cm)
- && 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;
- }
+ /* Mark level triggered interrupts as pending if they are still
+ raised. */
+ if (!GIC_TEST_TRIGGER(irq) && GIC_TEST_ENABLED(irq, cm)
+ && 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. */
}
}
-static uint32_t gic_dist_readb(void *opaque, target_phys_addr_t offset)
+static uint32_t gic_dist_readb(void *opaque, hwaddr offset)
{
- gic_state *s = (gic_state *)opaque;
+ GICState *s = (GICState *)opaque;
uint32_t res;
int irq;
int i;
int cm;
int mask;
- cpu = gic_get_current_cpu();
+ cpu = gic_get_current_cpu(s);
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);
+ return ((s->num_irq / 32) - 1) | ((NUM_CPU(s) - 1) << 5);
if (offset < 0x08)
return 0;
-#endif
+ if (offset >= 0x80) {
+ /* Interrupt Security , RAZ/WI */
+ return 0;
+ }
goto bad_reg;
} else if (offset < 0x200) {
/* Interrupt Set/Clear Enable. */
else
irq = (offset - 0x180) * 8;
irq += GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
goto bad_reg;
res = 0;
for (i = 0; i < 8; i++) {
else
irq = (offset - 0x280) * 8;
irq += GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
goto bad_reg;
res = 0;
- mask = (irq < 32) ? cm : ALL_CPU_MASK;
+ mask = (irq < GIC_INTERNAL) ? 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)
+ if (irq >= s->num_irq)
goto bad_reg;
res = 0;
- mask = (irq < 32) ? cm : ALL_CPU_MASK;
+ mask = (irq < GIC_INTERNAL) ? 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)
+ if (irq >= s->num_irq)
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;
+ if (s->num_cpu == 1 && s->revision != REV_11MPCORE) {
+ /* For uniprocessor GICs these RAZ/WI */
+ res = 0;
} else {
- res = GIC_TARGET(irq);
+ irq = (offset - 0x800) + GIC_BASE_IRQ;
+ if (irq >= s->num_irq) {
+ 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)
+ if (irq >= s->num_irq)
goto bad_reg;
res = 0;
for (i = 0; i < 4; i++) {
if (GIC_TEST_TRIGGER(irq + i))
res |= (2 << (i * 2));
}
-#endif
} else if (offset < 0xfe0) {
goto bad_reg;
} else /* offset >= 0xfe0 */ {
}
return res;
bad_reg:
- hw_error("gic_dist_readb: Bad offset %x\n", (int)offset);
+ qemu_log_mask(LOG_GUEST_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)
+static uint32_t gic_dist_readw(void *opaque, hwaddr offset)
{
uint32_t val;
val = gic_dist_readb(opaque, offset);
return val;
}
-static uint32_t gic_dist_readl(void *opaque, target_phys_addr_t offset)
+static uint32_t gic_dist_readl(void *opaque, hwaddr 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,
+static void gic_dist_writeb(void *opaque, hwaddr offset,
uint32_t value)
{
- gic_state *s = (gic_state *)opaque;
+ GICState *s = (GICState *)opaque;
int irq;
int i;
int cpu;
- cpu = gic_get_current_cpu();
+ cpu = gic_get_current_cpu(s);
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 if (offset >= 0x80) {
+ /* Interrupt Security Registers, RAZ/WI */
} else {
goto bad_reg;
}
-#endif
} else if (offset < 0x180) {
/* Interrupt Set Enable. */
irq = (offset - 0x100) * 8 + GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
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);
- int cm = (irq < 32) ? (1 << cpu) : ALL_CPU_MASK;
+ int mask =
+ (irq < GIC_INTERNAL) ? (1 << cpu) : GIC_TARGET(irq + i);
+ int cm = (irq < GIC_INTERNAL) ? (1 << cpu) : ALL_CPU_MASK;
if (!GIC_TEST_ENABLED(irq + i, cm)) {
DPRINTF("Enabled IRQ %d\n", irq + i);
} else if (offset < 0x200) {
/* Interrupt Clear Enable. */
irq = (offset - 0x180) * 8 + GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
goto bad_reg;
if (irq < 16)
value = 0;
for (i = 0; i < 8; i++) {
if (value & (1 << i)) {
- int cm = (irq < 32) ? (1 << cpu) : ALL_CPU_MASK;
+ int cm = (irq < GIC_INTERNAL) ? (1 << cpu) : ALL_CPU_MASK;
if (GIC_TEST_ENABLED(irq + i, cm)) {
DPRINTF("Disabled IRQ %d\n", irq + i);
} else if (offset < 0x280) {
/* Interrupt Set Pending. */
irq = (offset - 0x200) * 8 + GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
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));
+ GIC_SET_PENDING(irq + i, GIC_TARGET(irq + i));
}
}
} else if (offset < 0x300) {
/* Interrupt Clear Pending. */
irq = (offset - 0x280) * 8 + GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
goto bad_reg;
for (i = 0; i < 8; i++) {
/* ??? This currently clears the pending bit for all CPUs, even
} else if (offset < 0x800) {
/* Interrupt Priority. */
irq = (offset - 0x400) + GIC_BASE_IRQ;
- if (irq >= GIC_NIRQ)
+ if (irq >= s->num_irq)
goto bad_reg;
- if (irq < 32) {
+ if (irq < GIC_INTERNAL) {
s->priority1[irq][cpu] = value;
} else {
- s->priority2[irq - 32] = value;
+ s->priority2[irq - GIC_INTERNAL] = 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;
+ /* Interrupt CPU Target. RAZ/WI on uniprocessor GICs, with the
+ * annoying exception of the 11MPCore's GIC.
+ */
+ if (s->num_cpu != 1 || s->revision == REV_11MPCORE) {
+ irq = (offset - 0x800) + GIC_BASE_IRQ;
+ if (irq >= s->num_irq) {
+ goto bad_reg;
+ }
+ if (irq < 29) {
+ value = 0;
+ } else if (irq < GIC_INTERNAL) {
+ 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)
+ if (irq >= s->num_irq)
goto bad_reg;
- if (irq < 32)
+ if (irq < GIC_INTERNAL)
value |= 0xaa;
for (i = 0; i < 4; i++) {
if (value & (1 << (i * 2))) {
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);
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "gic_dist_writeb: Bad offset %x\n", (int)offset);
}
-static void gic_dist_writew(void *opaque, target_phys_addr_t offset,
+static void gic_dist_writew(void *opaque, hwaddr 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,
+static void gic_dist_writel(void *opaque, hwaddr 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
+ GICState *s = (GICState *)opaque;
if (offset == 0xf00) {
int cpu;
int irq;
int mask;
- cpu = gic_get_current_cpu();
+ cpu = gic_get_current_cpu(s);
irq = value & 0x3ff;
switch ((value >> 24) & 3) {
case 0:
.endianness = DEVICE_NATIVE_ENDIAN,
};
-#ifndef NVIC
-static uint32_t gic_cpu_read(gic_state *s, int cpu, int offset)
+static uint32_t gic_cpu_read(GICState *s, int cpu, int offset)
{
switch (offset) {
case 0x00: /* Control */
return 0;
case 0x0c: /* Acknowledge */
return gic_acknowledge_irq(s, cpu);
- case 0x14: /* Runing Priority */
+ case 0x14: /* Running 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);
+ qemu_log_mask(LOG_GUEST_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)
+static void gic_cpu_write(GICState *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");
+ DPRINTF("CPU %d %sabled\n", cpu, s->cpu_enabled[cpu] ? "En" : "Dis");
break;
case 0x04: /* Priority mask */
s->priority_mask[cpu] = (value & 0xff);
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);
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "gic_cpu_write: Bad offset %x\n", (int)offset);
return;
}
gic_update(s);
}
-#endif
-static void gic_reset(gic_state *s)
+/* Wrappers to read/write the GIC CPU interface for the current CPU */
+static uint64_t gic_thiscpu_read(void *opaque, hwaddr addr,
+ unsigned size)
{
- 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, ALL_CPU_MASK);
- GIC_SET_TRIGGER(i);
- }
-#ifdef NVIC
- /* The NVIC is always enabled. */
- s->enabled = 1;
-#else
- s->enabled = 0;
-#endif
+ GICState *s = (GICState *)opaque;
+ return gic_cpu_read(s, gic_get_current_cpu(s), addr);
+}
+
+static void gic_thiscpu_write(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ GICState *s = (GICState *)opaque;
+ gic_cpu_write(s, gic_get_current_cpu(s), addr, value);
}
-static void gic_save(QEMUFile *f, void *opaque)
+/* Wrappers to read/write the GIC CPU interface for a specific CPU.
+ * These just decode the opaque pointer into GICState* + cpu id.
+ */
+static uint64_t gic_do_cpu_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ GICState **backref = (GICState **)opaque;
+ GICState *s = *backref;
+ int id = (backref - s->backref);
+ return gic_cpu_read(s, id, addr);
+}
+
+static void gic_do_cpu_write(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ GICState **backref = (GICState **)opaque;
+ GICState *s = *backref;
+ int id = (backref - s->backref);
+ gic_cpu_write(s, id, addr, value);
+}
+
+static const MemoryRegionOps gic_thiscpu_ops = {
+ .read = gic_thiscpu_read,
+ .write = gic_thiscpu_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static const MemoryRegionOps gic_cpu_ops = {
+ .read = gic_do_cpu_read,
+ .write = gic_do_cpu_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+void gic_init_irqs_and_distributor(GICState *s, int num_irq)
{
- 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]);
- 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]);
+ i = s->num_irq - GIC_INTERNAL;
+ /* For the GIC, also expose incoming GPIO lines for PPIs for each CPU.
+ * GPIO array layout is thus:
+ * [0..N-1] SPIs
+ * [N..N+31] PPIs for CPU 0
+ * [N+32..N+63] PPIs for CPU 1
+ * ...
+ */
+ if (s->revision != REV_NVIC) {
+ i += (GIC_INTERNAL * s->num_cpu);
}
- for (i = 0; i < GIC_NIRQ; i++) {
-#ifndef NVIC
- qemu_put_be32(f, s->irq_target[i]);
-#endif
- 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);
+ qdev_init_gpio_in(&s->busdev.qdev, gic_set_irq, i);
+ for (i = 0; i < NUM_CPU(s); i++) {
+ sysbus_init_irq(&s->busdev, &s->parent_irq[i]);
}
+ memory_region_init_io(&s->iomem, &gic_dist_ops, s, "gic_dist", 0x1000);
}
-static int gic_load(QEMUFile *f, void *opaque, int version_id)
+static int arm_gic_init(SysBusDevice *dev)
{
- gic_state *s = (gic_state *)opaque;
+ /* Device instance init function for the GIC sysbus device */
int i;
- int j;
-
- if (version_id != 2)
- return -EINVAL;
-
- s->enabled = qemu_get_be32(f);
+ GICState *s = FROM_SYSBUS(GICState, dev);
+ ARMGICClass *agc = ARM_GIC_GET_CLASS(s);
+
+ agc->parent_init(dev);
+
+ gic_init_irqs_and_distributor(s, s->num_irq);
+
+ /* Memory regions for the CPU interfaces (NVIC doesn't have these):
+ * a region for "CPU interface for this core", then a region for
+ * "CPU interface for core 0", "for core 1", ...
+ * NB that the memory region size of 0x100 applies for the 11MPCore
+ * and also cores following the GIC v1 spec (ie A9).
+ * GIC v2 defines a larger memory region (0x1000) so this will need
+ * to be extended when we implement A15.
+ */
+ memory_region_init_io(&s->cpuiomem[0], &gic_thiscpu_ops, s,
+ "gic_cpu", 0x100);
for (i = 0; i < NUM_CPU(s); i++) {
- s->cpu_enabled[i] = qemu_get_be32(f);
- 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);
+ s->backref[i] = s;
+ memory_region_init_io(&s->cpuiomem[i+1], &gic_cpu_ops, &s->backref[i],
+ "gic_cpu", 0x100);
}
- for (i = 0; i < GIC_NIRQ; i++) {
-#ifndef NVIC
- s->irq_target[i] = qemu_get_be32(f);
-#endif
- 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);
+ /* Distributor */
+ sysbus_init_mmio(dev, &s->iomem);
+ /* cpu interfaces (one for "current cpu" plus one per cpu) */
+ for (i = 0; i <= NUM_CPU(s); i++) {
+ sysbus_init_mmio(dev, &s->cpuiomem[i]);
}
-
return 0;
}
-#if NCPU > 1
-static void gic_init(gic_state *s, int num_cpu)
-#else
-static void gic_init(gic_state *s)
-#endif
+static void arm_gic_class_init(ObjectClass *klass, void *data)
{
- int i;
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass);
+ ARMGICClass *agc = ARM_GIC_CLASS(klass);
+ agc->parent_init = sbc->init;
+ sbc->init = arm_gic_init;
+ dc->no_user = 1;
+}
-#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]);
- }
- memory_region_init_io(&s->iomem, &gic_dist_ops, s, "gic_dist", 0x1000);
- gic_reset(s);
- register_savevm(NULL, "arm_gic", -1, 2, gic_save, gic_load, s);
+static TypeInfo arm_gic_info = {
+ .name = TYPE_ARM_GIC,
+ .parent = TYPE_ARM_GIC_COMMON,
+ .instance_size = sizeof(GICState),
+ .class_init = arm_gic_class_init,
+ .class_size = sizeof(ARMGICClass),
+};
+
+static void arm_gic_register_types(void)
+{
+ type_register_static(&arm_gic_info);
}
+
+type_init(arm_gic_register_types)
projects / qemu.git / blobdiff