mirror of
https://github.com/xemu-project/xemu.git
synced 2024-12-11 21:44:04 +00:00
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/*
|
|
* QEMU Sparc SBI interrupt controller emulation
|
|
*
|
|
* Based on slavio_intctl, copyright (c) 2003-2005 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include "sysbus.h"
|
|
|
|
//#define DEBUG_IRQ
|
|
|
|
#ifdef DEBUG_IRQ
|
|
#define DPRINTF(fmt, ...) \
|
|
do { printf("IRQ: " fmt , ## __VA_ARGS__); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...)
|
|
#endif
|
|
|
|
#define MAX_CPUS 16
|
|
|
|
#define SBI_NREGS 16
|
|
|
|
typedef struct SBIState {
|
|
SysBusDevice busdev;
|
|
uint32_t regs[SBI_NREGS];
|
|
uint32_t intreg_pending[MAX_CPUS];
|
|
qemu_irq cpu_irqs[MAX_CPUS];
|
|
uint32_t pil_out[MAX_CPUS];
|
|
} SBIState;
|
|
|
|
#define SBI_SIZE (SBI_NREGS * 4)
|
|
|
|
static void sbi_set_irq(void *opaque, int irq, int level)
|
|
{
|
|
}
|
|
|
|
static uint32_t sbi_mem_readl(void *opaque, target_phys_addr_t addr)
|
|
{
|
|
SBIState *s = opaque;
|
|
uint32_t saddr, ret;
|
|
|
|
saddr = addr >> 2;
|
|
switch (saddr) {
|
|
default:
|
|
ret = s->regs[saddr];
|
|
break;
|
|
}
|
|
DPRINTF("read system reg 0x" TARGET_FMT_plx " = %x\n", addr, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sbi_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
|
|
{
|
|
SBIState *s = opaque;
|
|
uint32_t saddr;
|
|
|
|
saddr = addr >> 2;
|
|
DPRINTF("write system reg 0x" TARGET_FMT_plx " = %x\n", addr, val);
|
|
switch (saddr) {
|
|
default:
|
|
s->regs[saddr] = val;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static CPUReadMemoryFunc * const sbi_mem_read[3] = {
|
|
NULL,
|
|
NULL,
|
|
sbi_mem_readl,
|
|
};
|
|
|
|
static CPUWriteMemoryFunc * const sbi_mem_write[3] = {
|
|
NULL,
|
|
NULL,
|
|
sbi_mem_writel,
|
|
};
|
|
|
|
static const VMStateDescription vmstate_sbi = {
|
|
.name ="sbi",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.minimum_version_id_old = 1,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_UINT32_ARRAY(intreg_pending, SBIState, MAX_CPUS),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void sbi_reset(DeviceState *d)
|
|
{
|
|
SBIState *s = container_of(d, SBIState, busdev.qdev);
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
s->intreg_pending[i] = 0;
|
|
}
|
|
}
|
|
|
|
static int sbi_init1(SysBusDevice *dev)
|
|
{
|
|
SBIState *s = FROM_SYSBUS(SBIState, dev);
|
|
int sbi_io_memory;
|
|
unsigned int i;
|
|
|
|
qdev_init_gpio_in(&dev->qdev, sbi_set_irq, 32 + MAX_CPUS);
|
|
for (i = 0; i < MAX_CPUS; i++) {
|
|
sysbus_init_irq(dev, &s->cpu_irqs[i]);
|
|
}
|
|
|
|
sbi_io_memory = cpu_register_io_memory(sbi_mem_read, sbi_mem_write, s);
|
|
sysbus_init_mmio(dev, SBI_SIZE, sbi_io_memory);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SysBusDeviceInfo sbi_info = {
|
|
.init = sbi_init1,
|
|
.qdev.name = "sbi",
|
|
.qdev.size = sizeof(SBIState),
|
|
.qdev.vmsd = &vmstate_sbi,
|
|
.qdev.reset = sbi_reset,
|
|
};
|
|
|
|
static void sbi_register_devices(void)
|
|
{
|
|
sysbus_register_withprop(&sbi_info);
|
|
}
|
|
|
|
device_init(sbi_register_devices)
|