The parameter is always zero except when registering the three internal io regions (ROM, unassigned, notdirty). Remove the parameter to reduce the API's power, thus facilitating future change. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
228 lines
6.3 KiB
C
228 lines
6.3 KiB
C
/*
|
|
* Syborg interrupt controller.
|
|
*
|
|
* Copyright (c) 2008 CodeSourcery
|
|
*
|
|
* 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"
|
|
#include "syborg.h"
|
|
|
|
//#define DEBUG_SYBORG_INT
|
|
|
|
#ifdef DEBUG_SYBORG_INT
|
|
#define DPRINTF(fmt, ...) \
|
|
do { printf("syborg_int: " fmt , ## __VA_ARGS__); } while (0)
|
|
#define BADF(fmt, ...) \
|
|
do { fprintf(stderr, "syborg_int: error: " fmt , ## __VA_ARGS__); \
|
|
exit(1);} while (0)
|
|
#else
|
|
#define DPRINTF(fmt, ...) do {} while(0)
|
|
#define BADF(fmt, ...) \
|
|
do { fprintf(stderr, "syborg_int: error: " fmt , ## __VA_ARGS__);} while (0)
|
|
#endif
|
|
enum {
|
|
INT_ID = 0,
|
|
INT_STATUS = 1, /* number of pending interrupts */
|
|
INT_CURRENT = 2, /* next interrupt to be serviced */
|
|
INT_DISABLE_ALL = 3,
|
|
INT_DISABLE = 4,
|
|
INT_ENABLE = 5,
|
|
INT_TOTAL = 6
|
|
};
|
|
|
|
typedef struct {
|
|
unsigned level:1;
|
|
unsigned enabled:1;
|
|
} syborg_int_flags;
|
|
|
|
typedef struct {
|
|
SysBusDevice busdev;
|
|
int pending_count;
|
|
int num_irqs;
|
|
syborg_int_flags *flags;
|
|
qemu_irq parent_irq;
|
|
} SyborgIntState;
|
|
|
|
static void syborg_int_update(SyborgIntState *s)
|
|
{
|
|
DPRINTF("pending %d\n", s->pending_count);
|
|
qemu_set_irq(s->parent_irq, s->pending_count > 0);
|
|
}
|
|
|
|
static void syborg_int_set_irq(void *opaque, int irq, int level)
|
|
{
|
|
SyborgIntState *s = (SyborgIntState *)opaque;
|
|
|
|
if (s->flags[irq].level == level)
|
|
return;
|
|
|
|
s->flags[irq].level = level;
|
|
if (s->flags[irq].enabled) {
|
|
if (level)
|
|
s->pending_count++;
|
|
else
|
|
s->pending_count--;
|
|
syborg_int_update(s);
|
|
}
|
|
}
|
|
|
|
static uint32_t syborg_int_read(void *opaque, target_phys_addr_t offset)
|
|
{
|
|
SyborgIntState *s = (SyborgIntState *)opaque;
|
|
int i;
|
|
|
|
offset &= 0xfff;
|
|
switch (offset >> 2) {
|
|
case INT_ID:
|
|
return SYBORG_ID_INT;
|
|
case INT_STATUS:
|
|
DPRINTF("read status=%d\n", s->pending_count);
|
|
return s->pending_count;
|
|
|
|
case INT_CURRENT:
|
|
for (i = 0; i < s->num_irqs; i++) {
|
|
if (s->flags[i].level & s->flags[i].enabled) {
|
|
DPRINTF("read current=%d\n", i);
|
|
return i;
|
|
}
|
|
}
|
|
DPRINTF("read current=none\n");
|
|
return 0xffffffffu;
|
|
|
|
default:
|
|
cpu_abort(cpu_single_env, "syborg_int_read: Bad offset %x\n",
|
|
(int)offset);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void syborg_int_write(void *opaque, target_phys_addr_t offset, uint32_t value)
|
|
{
|
|
SyborgIntState *s = (SyborgIntState *)opaque;
|
|
int i;
|
|
offset &= 0xfff;
|
|
|
|
DPRINTF("syborg_int_write offset=%d val=%d\n", (int)offset, (int)value);
|
|
switch (offset >> 2) {
|
|
case INT_DISABLE_ALL:
|
|
s->pending_count = 0;
|
|
for (i = 0; i < s->num_irqs; i++)
|
|
s->flags[i].enabled = 0;
|
|
break;
|
|
|
|
case INT_DISABLE:
|
|
if (value >= s->num_irqs)
|
|
break;
|
|
if (s->flags[value].enabled) {
|
|
if (s->flags[value].enabled)
|
|
s->pending_count--;
|
|
s->flags[value].enabled = 0;
|
|
}
|
|
break;
|
|
|
|
case INT_ENABLE:
|
|
if (value >= s->num_irqs)
|
|
break;
|
|
if (!(s->flags[value].enabled)) {
|
|
if(s->flags[value].level)
|
|
s->pending_count++;
|
|
s->flags[value].enabled = 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
cpu_abort(cpu_single_env, "syborg_int_write: Bad offset %x\n",
|
|
(int)offset);
|
|
return;
|
|
}
|
|
syborg_int_update(s);
|
|
}
|
|
|
|
static CPUReadMemoryFunc *syborg_int_readfn[] = {
|
|
syborg_int_read,
|
|
syborg_int_read,
|
|
syborg_int_read
|
|
};
|
|
|
|
static CPUWriteMemoryFunc *syborg_int_writefn[] = {
|
|
syborg_int_write,
|
|
syborg_int_write,
|
|
syborg_int_write
|
|
};
|
|
|
|
static void syborg_int_save(QEMUFile *f, void *opaque)
|
|
{
|
|
SyborgIntState *s = (SyborgIntState *)opaque;
|
|
int i;
|
|
|
|
qemu_put_be32(f, s->num_irqs);
|
|
qemu_put_be32(f, s->pending_count);
|
|
for (i = 0; i < s->num_irqs; i++) {
|
|
qemu_put_be32(f, s->flags[i].enabled
|
|
| ((unsigned)s->flags[i].level << 1));
|
|
}
|
|
}
|
|
|
|
static int syborg_int_load(QEMUFile *f, void *opaque, int version_id)
|
|
{
|
|
SyborgIntState *s = (SyborgIntState *)opaque;
|
|
uint32_t val;
|
|
int i;
|
|
|
|
if (version_id != 1)
|
|
return -EINVAL;
|
|
|
|
val = qemu_get_be32(f);
|
|
if (val != s->num_irqs)
|
|
return -EINVAL;
|
|
s->pending_count = qemu_get_be32(f);
|
|
for (i = 0; i < s->num_irqs; i++) {
|
|
val = qemu_get_be32(f);
|
|
s->flags[i].enabled = val & 1;
|
|
s->flags[i].level = (val >> 1) & 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void syborg_int_init(SysBusDevice *dev)
|
|
{
|
|
SyborgIntState *s = FROM_SYSBUS(SyborgIntState, dev);
|
|
int iomemtype;
|
|
|
|
sysbus_init_irq(dev, &s->parent_irq);
|
|
s->num_irqs = qdev_get_prop_int(&dev->qdev, "num-interrupts", 64);
|
|
qdev_init_gpio_in(&dev->qdev, syborg_int_set_irq, s->num_irqs);
|
|
iomemtype = cpu_register_io_memory(syborg_int_readfn,
|
|
syborg_int_writefn, s);
|
|
sysbus_init_mmio(dev, 0x1000, iomemtype);
|
|
s->flags = qemu_mallocz(s->num_irqs * sizeof(syborg_int_flags));
|
|
|
|
register_savevm("syborg_int", -1, 1, syborg_int_save, syborg_int_load, s);
|
|
}
|
|
|
|
static void syborg_interrupt_register_devices(void)
|
|
{
|
|
sysbus_register_dev("syborg,interrupt", sizeof(SyborgIntState),
|
|
syborg_int_init);
|
|
}
|
|
|
|
device_init(syborg_interrupt_register_devices)
|