244 lines
6.9 KiB
C
244 lines
6.9 KiB
C
/*
|
|
* Raspberry Pi emulation (c) 2012 Gregory Estrade
|
|
* Refactoring for Pi2 Copyright (c) 2015, Microsoft. Written by Andrew Baumann.
|
|
* Heavily based on pl190.c, copyright terms below:
|
|
*
|
|
* Arm PrimeCell PL190 Vector Interrupt Controller
|
|
*
|
|
* Copyright (c) 2006 CodeSourcery.
|
|
* Written by Paul Brook
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "hw/intc/bcm2835_ic.h"
|
|
#include "hw/irq.h"
|
|
#include "migration/vmstate.h"
|
|
#include "qemu/log.h"
|
|
#include "qemu/module.h"
|
|
#include "trace.h"
|
|
|
|
#define GPU_IRQS 64
|
|
#define ARM_IRQS 8
|
|
|
|
#define IRQ_PENDING_BASIC 0x00 /* IRQ basic pending */
|
|
#define IRQ_PENDING_1 0x04 /* IRQ pending 1 */
|
|
#define IRQ_PENDING_2 0x08 /* IRQ pending 2 */
|
|
#define FIQ_CONTROL 0x0C /* FIQ register */
|
|
#define IRQ_ENABLE_1 0x10 /* Interrupt enable register 1 */
|
|
#define IRQ_ENABLE_2 0x14 /* Interrupt enable register 2 */
|
|
#define IRQ_ENABLE_BASIC 0x18 /* Base interrupt enable register */
|
|
#define IRQ_DISABLE_1 0x1C /* Interrupt disable register 1 */
|
|
#define IRQ_DISABLE_2 0x20 /* Interrupt disable register 2 */
|
|
#define IRQ_DISABLE_BASIC 0x24 /* Base interrupt disable register */
|
|
|
|
/* Update interrupts. */
|
|
static void bcm2835_ic_update(BCM2835ICState *s)
|
|
{
|
|
bool set = false;
|
|
|
|
if (s->fiq_enable) {
|
|
if (s->fiq_select >= GPU_IRQS) {
|
|
/* ARM IRQ */
|
|
set = extract32(s->arm_irq_level, s->fiq_select - GPU_IRQS, 1);
|
|
} else {
|
|
set = extract64(s->gpu_irq_level, s->fiq_select, 1);
|
|
}
|
|
}
|
|
qemu_set_irq(s->fiq, set);
|
|
|
|
set = (s->gpu_irq_level & s->gpu_irq_enable)
|
|
|| (s->arm_irq_level & s->arm_irq_enable);
|
|
qemu_set_irq(s->irq, set);
|
|
}
|
|
|
|
static void bcm2835_ic_set_gpu_irq(void *opaque, int irq, int level)
|
|
{
|
|
BCM2835ICState *s = opaque;
|
|
|
|
assert(irq >= 0 && irq < 64);
|
|
trace_bcm2835_ic_set_gpu_irq(irq, level);
|
|
s->gpu_irq_level = deposit64(s->gpu_irq_level, irq, 1, level != 0);
|
|
bcm2835_ic_update(s);
|
|
}
|
|
|
|
static void bcm2835_ic_set_arm_irq(void *opaque, int irq, int level)
|
|
{
|
|
BCM2835ICState *s = opaque;
|
|
|
|
assert(irq >= 0 && irq < 8);
|
|
trace_bcm2835_ic_set_cpu_irq(irq, level);
|
|
s->arm_irq_level = deposit32(s->arm_irq_level, irq, 1, level != 0);
|
|
bcm2835_ic_update(s);
|
|
}
|
|
|
|
static const int irq_dups[] = { 7, 9, 10, 18, 19, 53, 54, 55, 56, 57, 62 };
|
|
|
|
static uint64_t bcm2835_ic_read(void *opaque, hwaddr offset, unsigned size)
|
|
{
|
|
BCM2835ICState *s = opaque;
|
|
uint32_t res = 0;
|
|
uint64_t gpu_pending = s->gpu_irq_level & s->gpu_irq_enable;
|
|
int i;
|
|
|
|
switch (offset) {
|
|
case IRQ_PENDING_BASIC:
|
|
/* bits 0-7: ARM irqs */
|
|
res = s->arm_irq_level & s->arm_irq_enable;
|
|
|
|
/* bits 8 & 9: pending registers 1 & 2 */
|
|
res |= (((uint32_t)gpu_pending) != 0) << 8;
|
|
res |= ((gpu_pending >> 32) != 0) << 9;
|
|
|
|
/* bits 10-20: selected GPU IRQs */
|
|
for (i = 0; i < ARRAY_SIZE(irq_dups); i++) {
|
|
res |= extract64(gpu_pending, irq_dups[i], 1) << (i + 10);
|
|
}
|
|
break;
|
|
case IRQ_PENDING_1:
|
|
res = gpu_pending;
|
|
break;
|
|
case IRQ_PENDING_2:
|
|
res = gpu_pending >> 32;
|
|
break;
|
|
case FIQ_CONTROL:
|
|
res = (s->fiq_enable << 7) | s->fiq_select;
|
|
break;
|
|
case IRQ_ENABLE_1:
|
|
res = s->gpu_irq_enable;
|
|
break;
|
|
case IRQ_ENABLE_2:
|
|
res = s->gpu_irq_enable >> 32;
|
|
break;
|
|
case IRQ_ENABLE_BASIC:
|
|
res = s->arm_irq_enable;
|
|
break;
|
|
case IRQ_DISABLE_1:
|
|
res = ~s->gpu_irq_enable;
|
|
break;
|
|
case IRQ_DISABLE_2:
|
|
res = ~s->gpu_irq_enable >> 32;
|
|
break;
|
|
case IRQ_DISABLE_BASIC:
|
|
res = ~s->arm_irq_enable;
|
|
break;
|
|
default:
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
|
|
__func__, offset);
|
|
return 0;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
static void bcm2835_ic_write(void *opaque, hwaddr offset, uint64_t val,
|
|
unsigned size)
|
|
{
|
|
BCM2835ICState *s = opaque;
|
|
|
|
switch (offset) {
|
|
case FIQ_CONTROL:
|
|
s->fiq_select = extract32(val, 0, 7);
|
|
s->fiq_enable = extract32(val, 7, 1);
|
|
break;
|
|
case IRQ_ENABLE_1:
|
|
s->gpu_irq_enable |= val;
|
|
break;
|
|
case IRQ_ENABLE_2:
|
|
s->gpu_irq_enable |= val << 32;
|
|
break;
|
|
case IRQ_ENABLE_BASIC:
|
|
s->arm_irq_enable |= val & 0xff;
|
|
break;
|
|
case IRQ_DISABLE_1:
|
|
s->gpu_irq_enable &= ~val;
|
|
break;
|
|
case IRQ_DISABLE_2:
|
|
s->gpu_irq_enable &= ~(val << 32);
|
|
break;
|
|
case IRQ_DISABLE_BASIC:
|
|
s->arm_irq_enable &= ~val & 0xff;
|
|
break;
|
|
default:
|
|
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
|
|
__func__, offset);
|
|
return;
|
|
}
|
|
bcm2835_ic_update(s);
|
|
}
|
|
|
|
static const MemoryRegionOps bcm2835_ic_ops = {
|
|
.read = bcm2835_ic_read,
|
|
.write = bcm2835_ic_write,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
.valid.min_access_size = 4,
|
|
.valid.max_access_size = 4,
|
|
};
|
|
|
|
static void bcm2835_ic_reset(DeviceState *d)
|
|
{
|
|
BCM2835ICState *s = BCM2835_IC(d);
|
|
|
|
s->gpu_irq_enable = 0;
|
|
s->arm_irq_enable = 0;
|
|
s->fiq_enable = false;
|
|
s->fiq_select = 0;
|
|
}
|
|
|
|
static void bcm2835_ic_init(Object *obj)
|
|
{
|
|
BCM2835ICState *s = BCM2835_IC(obj);
|
|
|
|
memory_region_init_io(&s->iomem, obj, &bcm2835_ic_ops, s, TYPE_BCM2835_IC,
|
|
0x200);
|
|
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
|
|
|
|
qdev_init_gpio_in_named(DEVICE(s), bcm2835_ic_set_gpu_irq,
|
|
BCM2835_IC_GPU_IRQ, GPU_IRQS);
|
|
qdev_init_gpio_in_named(DEVICE(s), bcm2835_ic_set_arm_irq,
|
|
BCM2835_IC_ARM_IRQ, ARM_IRQS);
|
|
|
|
sysbus_init_irq(SYS_BUS_DEVICE(s), &s->irq);
|
|
sysbus_init_irq(SYS_BUS_DEVICE(s), &s->fiq);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_bcm2835_ic = {
|
|
.name = TYPE_BCM2835_IC,
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT64(gpu_irq_level, BCM2835ICState),
|
|
VMSTATE_UINT64(gpu_irq_enable, BCM2835ICState),
|
|
VMSTATE_UINT8(arm_irq_level, BCM2835ICState),
|
|
VMSTATE_UINT8(arm_irq_enable, BCM2835ICState),
|
|
VMSTATE_BOOL(fiq_enable, BCM2835ICState),
|
|
VMSTATE_UINT8(fiq_select, BCM2835ICState),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void bcm2835_ic_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
dc->reset = bcm2835_ic_reset;
|
|
dc->vmsd = &vmstate_bcm2835_ic;
|
|
}
|
|
|
|
static TypeInfo bcm2835_ic_info = {
|
|
.name = TYPE_BCM2835_IC,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(BCM2835ICState),
|
|
.class_init = bcm2835_ic_class_init,
|
|
.instance_init = bcm2835_ic_init,
|
|
};
|
|
|
|
static void bcm2835_ic_register_types(void)
|
|
{
|
|
type_register_static(&bcm2835_ic_info);
|
|
}
|
|
|
|
type_init(bcm2835_ic_register_types)
|