qemu-e2k/hw/sbi.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

149 lines
3.8 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,
DEVICE_NATIVE_ENDIAN);
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)