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-rw-r--r--hw/arm_gic.c366
1 files changed, 56 insertions, 310 deletions
diff --git a/hw/arm_gic.c b/hw/arm_gic.c
index c78d58ea26..186ac66f00 100644
--- a/hw/arm_gic.c
+++ b/hw/arm_gic.c
@@ -19,17 +19,7 @@
*/
#include "sysbus.h"
-
-/* Maximum number of possible interrupts, determined by the GIC architecture */
-#define GIC_MAXIRQ 1020
-/* First 32 are private to each CPU (SGIs and PPIs). */
-#define GIC_INTERNAL 32
-/* Maximum number of possible CPU interfaces, determined by GIC architecture */
-#ifdef NVIC
-#define NCPU 1
-#else
-#define NCPU 8
-#endif
+#include "arm_gic_internal.h"
//#define DEBUG_GIC
@@ -40,114 +30,23 @@ do { fprintf(stderr, "arm_gic: " fmt , ## __VA_ARGS__); } while (0)
#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 ((unsigned)(((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) < GIC_INTERNAL) ? \
- s->priority1[irq][cpu] : \
- s->priority2[(irq) - GIC_INTERNAL])
-#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_MAXIRQ];
-#ifndef NVIC
- int irq_target[GIC_MAXIRQ];
-#endif
- int priority1[GIC_INTERNAL][NCPU];
- int priority2[GIC_MAXIRQ - GIC_INTERNAL];
- int last_active[GIC_MAXIRQ][NCPU];
-
- int priority_mask[NCPU];
- int running_irq[NCPU];
- int running_priority[NCPU];
- int current_pending[NCPU];
-
-#if NCPU > 1
- uint32_t num_cpu;
-#endif
-
- MemoryRegion iomem; /* Distributor */
-#ifndef NVIC
- /* This is just so we can have an opaque pointer which identifies
- * both this GIC and which CPU interface we should be accessing.
- */
- struct gic_state *backref[NCPU];
- MemoryRegion cpuiomem[NCPU+1]; /* CPU interfaces */
-#endif
- uint32_t num_irq;
-} gic_state;
static inline int gic_get_current_cpu(gic_state *s)
{
-#if NCPU > 1
if (s->num_cpu > 1) {
return cpu_single_env->cpu_index;
}
-#endif
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(gic_state *s)
{
int best_irq;
int best_prio;
@@ -185,8 +84,7 @@ static void gic_update(gic_state *s)
}
}
-#ifdef NVIC
-static void gic_set_pending_private(gic_state *s, int cpu, int irq)
+void gic_set_pending_private(gic_state *s, int cpu, int irq)
{
int cm = 1 << cpu;
@@ -197,7 +95,6 @@ static void gic_set_pending_private(gic_state *s, int cpu, int irq)
GIC_SET_PENDING(irq, cm);
gic_update(s);
}
-#endif
/* Process a change in an external IRQ input. */
static void gic_set_irq(void *opaque, int irq, int level)
@@ -251,7 +148,7 @@ static void gic_set_running_irq(gic_state *s, int cpu, int irq)
gic_update(s);
}
-static uint32_t gic_acknowledge_irq(gic_state *s, int cpu)
+uint32_t gic_acknowledge_irq(gic_state *s, int cpu)
{
int new_irq;
int cm = 1 << cpu;
@@ -270,7 +167,7 @@ static uint32_t gic_acknowledge_irq(gic_state *s, int cpu)
return new_irq;
}
-static void gic_complete_irq(gic_state * s, int cpu, int irq)
+void gic_complete_irq(gic_state *s, int cpu, int irq)
{
int update = 0;
int cm = 1 << cpu;
@@ -328,7 +225,6 @@ static uint32_t gic_dist_readb(void *opaque, target_phys_addr_t offset)
cpu = gic_get_current_cpu(s);
cm = 1 << cpu;
if (offset < 0x100) {
-#ifndef NVIC
if (offset == 0)
return s->enabled;
if (offset == 4)
@@ -339,7 +235,6 @@ static uint32_t gic_dist_readb(void *opaque, target_phys_addr_t offset)
/* Interrupt Security , RAZ/WI */
return 0;
}
-#endif
goto bad_reg;
} else if (offset < 0x200) {
/* Interrupt Set/Clear Enable. */
@@ -390,16 +285,21 @@ static uint32_t gic_dist_readb(void *opaque, target_phys_addr_t offset)
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 >= s->num_irq)
- 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. */
@@ -413,7 +313,6 @@ static uint32_t gic_dist_readb(void *opaque, target_phys_addr_t offset)
if (GIC_TEST_TRIGGER(irq + i))
res |= (2 << (i * 2));
}
-#endif
} else if (offset < 0xfe0) {
goto bad_reg;
} else /* offset >= 0xfe0 */ {
@@ -440,13 +339,6 @@ static uint32_t gic_dist_readw(void *opaque, target_phys_addr_t offset)
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;
@@ -462,9 +354,6 @@ static void gic_dist_writeb(void *opaque, target_phys_addr_t offset,
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");
@@ -475,7 +364,6 @@ static void gic_dist_writeb(void *opaque, target_phys_addr_t offset,
} else {
goto bad_reg;
}
-#endif
} else if (offset < 0x180) {
/* Interrupt Set Enable. */
irq = (offset - 0x100) * 8 + GIC_BASE_IRQ;
@@ -557,17 +445,22 @@ static void gic_dist_writeb(void *opaque, target_phys_addr_t offset,
} else {
s->priority2[irq - GIC_INTERNAL] = value;
}
-#ifndef NVIC
} else if (offset < 0xc00) {
- /* Interrupt CPU Target. */
- 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;
+ /* 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;
@@ -587,7 +480,6 @@ static void gic_dist_writeb(void *opaque, target_phys_addr_t offset,
GIC_CLEAR_TRIGGER(irq + i);
}
}
-#endif
} else {
/* 0xf00 is only handled for 32-bit writes. */
goto bad_reg;
@@ -609,14 +501,6 @@ 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;
@@ -655,7 +539,6 @@ static const MemoryRegionOps gic_dist_ops = {
.endianness = DEVICE_NATIVE_ENDIAN,
};
-#ifndef NVIC
static uint32_t gic_cpu_read(gic_state *s, int cpu, int offset)
{
switch (offset) {
@@ -747,141 +630,12 @@ static const MemoryRegionOps gic_cpu_ops = {
.write = gic_do_cpu_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
-#endif
-
-static void gic_reset(DeviceState *dev)
-{
- gic_state *s = FROM_SYSBUS(gic_state, sysbus_from_qdev(dev));
- int i;
- memset(s->irq_state, 0, GIC_MAXIRQ * 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
-}
-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]);
- for (j = 0; j < GIC_INTERNAL; j++)
- qemu_put_be32(f, s->priority1[j][i]);
- for (j = 0; j < s->num_irq; 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 < s->num_irq - GIC_INTERNAL; i++) {
- qemu_put_be32(f, s->priority2[i]);
- }
- for (i = 0; i < s->num_irq; 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);
- }
-}
-
-static int gic_load(QEMUFile *f, void *opaque, int version_id)
-{
- gic_state *s = (gic_state *)opaque;
- int i;
- int j;
-
- if (version_id != 2)
- return -EINVAL;
-
- s->enabled = qemu_get_be32(f);
- for (i = 0; i < NUM_CPU(s); i++) {
- s->cpu_enabled[i] = qemu_get_be32(f);
- for (j = 0; j < GIC_INTERNAL; j++)
- s->priority1[j][i] = qemu_get_be32(f);
- for (j = 0; j < s->num_irq; 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 < s->num_irq - GIC_INTERNAL; i++) {
- s->priority2[i] = qemu_get_be32(f);
- }
- for (i = 0; i < s->num_irq; 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);
- }
-
- return 0;
-}
-
-#if NCPU > 1
-static void gic_init(gic_state *s, int num_cpu, int num_irq)
-#else
-static void gic_init(gic_state *s, int num_irq)
-#endif
+void gic_init_irqs_and_distributor(gic_state *s, int num_irq)
{
int i;
-#if NCPU > 1
- s->num_cpu = num_cpu;
- if (s->num_cpu > NCPU) {
- hw_error("requested %u CPUs exceeds GIC maximum %d\n",
- num_cpu, NCPU);
- }
-#endif
- s->num_irq = num_irq + GIC_BASE_IRQ;
- if (s->num_irq > GIC_MAXIRQ) {
- hw_error("requested %u interrupt lines exceeds GIC maximum %d\n",
- num_irq, GIC_MAXIRQ);
- }
- /* ITLinesNumber is represented as (N / 32) - 1 (see
- * gic_dist_readb) so this is an implementation imposed
- * restriction, not an architectural one:
- */
- if (s->num_irq < 32 || (s->num_irq % 32)) {
- hw_error("%d interrupt lines unsupported: not divisible by 32\n",
- num_irq);
- }
-
i = s->num_irq - GIC_INTERNAL;
-#ifndef NVIC
/* For the GIC, also expose incoming GPIO lines for PPIs for each CPU.
* GPIO array layout is thus:
* [0..N-1] SPIs
@@ -889,14 +643,27 @@ static void gic_init(gic_state *s, int num_irq)
* [N+32..N+63] PPIs for CPU 1
* ...
*/
- i += (GIC_INTERNAL * num_cpu);
-#endif
+ if (s->revision != REV_NVIC) {
+ i += (GIC_INTERNAL * s->num_cpu);
+ }
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);
-#ifndef NVIC
+}
+
+static int arm_gic_init(SysBusDevice *dev)
+{
+ /* Device instance init function for the GIC sysbus device */
+ int i;
+ gic_state *s = FROM_SYSBUS(gic_state, 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", ...
@@ -912,19 +679,6 @@ static void gic_init(gic_state *s, int num_irq)
memory_region_init_io(&s->cpuiomem[i+1], &gic_cpu_ops, &s->backref[i],
"gic_cpu", 0x100);
}
-#endif
-
- register_savevm(NULL, "arm_gic", -1, 2, gic_save, gic_load, s);
-}
-
-#ifndef NVIC
-
-static int arm_gic_init(SysBusDevice *dev)
-{
- /* Device instance init function for the GIC sysbus device */
- int i;
- gic_state *s = FROM_SYSBUS(gic_state, dev);
- gic_init(s, s->num_cpu, s->num_irq);
/* Distributor */
sysbus_init_mmio(dev, &s->iomem);
/* cpu interfaces (one for "current cpu" plus one per cpu) */
@@ -934,25 +688,19 @@ static int arm_gic_init(SysBusDevice *dev)
return 0;
}
-static Property arm_gic_properties[] = {
- DEFINE_PROP_UINT32("num-cpu", gic_state, num_cpu, 1),
- DEFINE_PROP_UINT32("num-irq", gic_state, num_irq, 32),
- DEFINE_PROP_END_OF_LIST(),
-};
-
static void arm_gic_class_init(ObjectClass *klass, void *data)
{
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->props = arm_gic_properties;
- dc->reset = gic_reset;
dc->no_user = 1;
}
static TypeInfo arm_gic_info = {
- .name = "arm_gic",
- .parent = TYPE_SYS_BUS_DEVICE,
+ .name = TYPE_ARM_GIC,
+ .parent = TYPE_ARM_GIC_COMMON,
.instance_size = sizeof(gic_state),
.class_init = arm_gic_class_init,
};
@@ -963,5 +711,3 @@ static void arm_gic_register_types(void)
}
type_init(arm_gic_register_types)
-
-#endif
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-28 04:11:32 +0000