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hw/pl181.c: Add save/load support

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Add save/load support to the PL181.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2011-12-19 12:01:44 +00:00
parent f3c6a169a3
commit 624923be11
1 changed files with 40 additions and 9 deletions
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49
hw/pl181.c
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@ -38,20 +38,45 @@ typedef struct {
uint32_t datacnt; uint32_t datacnt;
uint32_t status; uint32_t status;
uint32_t mask[2]; uint32_t mask[2];
int fifo_pos; int32_t fifo_pos;
int fifo_len; int32_t fifo_len;
/* The linux 2.6.21 driver is buggy, and misbehaves if new data arrives /* The linux 2.6.21 driver is buggy, and misbehaves if new data arrives
while it is reading the FIFO. We hack around this be defering while it is reading the FIFO. We hack around this be defering
subsequent transfers until after the driver polls the status word. subsequent transfers until after the driver polls the status word.
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=4446/1 http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=4446/1
*/ */
int linux_hack; int32_t linux_hack;
uint32_t fifo[PL181_FIFO_LEN]; uint32_t fifo[PL181_FIFO_LEN];
qemu_irq irq[2]; qemu_irq irq[2];
/* GPIO outputs for 'card is readonly' and 'card inserted' */ /* GPIO outputs for 'card is readonly' and 'card inserted' */
qemu_irq cardstatus[2]; qemu_irq cardstatus[2];
} pl181_state; } pl181_state;
static const VMStateDescription vmstate_pl181 = {
.name = "pl181",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(clock, pl181_state),
VMSTATE_UINT32(power, pl181_state),
VMSTATE_UINT32(cmdarg, pl181_state),
VMSTATE_UINT32(cmd, pl181_state),
VMSTATE_UINT32(datatimer, pl181_state),
VMSTATE_UINT32(datalength, pl181_state),
VMSTATE_UINT32(respcmd, pl181_state),
VMSTATE_UINT32_ARRAY(response, pl181_state, 4),
VMSTATE_UINT32(datactrl, pl181_state),
VMSTATE_UINT32(datacnt, pl181_state),
VMSTATE_UINT32(status, pl181_state),
VMSTATE_UINT32_ARRAY(mask, pl181_state, 2),
VMSTATE_INT32(fifo_pos, pl181_state),
VMSTATE_INT32(fifo_len, pl181_state),
VMSTATE_INT32(linux_hack, pl181_state),
VMSTATE_UINT32_ARRAY(fifo, pl181_state, PL181_FIFO_LEN),
VMSTATE_END_OF_LIST()
}
};
#define PL181_CMD_INDEX 0x3f #define PL181_CMD_INDEX 0x3f
#define PL181_CMD_RESPONSE (1 << 6) #define PL181_CMD_RESPONSE (1 << 6)
#define PL181_CMD_LONGRESP (1 << 7) #define PL181_CMD_LONGRESP (1 << 7)
@ -420,9 +445,9 @@ static const MemoryRegionOps pl181_ops = {
.endianness = DEVICE_NATIVE_ENDIAN, .endianness = DEVICE_NATIVE_ENDIAN,
}; };
static void pl181_reset(void *opaque) static void pl181_reset(DeviceState *d)
{ {
pl181_state *s = (pl181_state *)opaque; pl181_state *s = DO_UPCAST(pl181_state, busdev.qdev, d);
s->power = 0; s->power = 0;
s->cmdarg = 0; s->cmdarg = 0;
@ -459,15 +484,21 @@ static int pl181_init(SysBusDevice *dev)
qdev_init_gpio_out(&s->busdev.qdev, s->cardstatus, 2); qdev_init_gpio_out(&s->busdev.qdev, s->cardstatus, 2);
dinfo = drive_get_next(IF_SD); dinfo = drive_get_next(IF_SD);
s->card = sd_init(dinfo ? dinfo->bdrv : NULL, 0); s->card = sd_init(dinfo ? dinfo->bdrv : NULL, 0);
qemu_register_reset(pl181_reset, s);
pl181_reset(s);
/* ??? Save/restore. */
return 0; return 0;
} }
static SysBusDeviceInfo pl181_info = {
.init = pl181_init,
.qdev.name = "pl181",
.qdev.size = sizeof(pl181_state),
.qdev.vmsd = &vmstate_pl181,
.qdev.reset = pl181_reset,
.qdev.no_user = 1,
};
static void pl181_register_devices(void) static void pl181_register_devices(void)
{ {
sysbus_register_dev("pl181", sizeof(pl181_state), pl181_init); sysbus_register_withprop(&pl181_info);
} }
device_init(pl181_register_devices) device_init(pl181_register_devices)