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Fix GPE registers read/write handling. (Gleb Natapov) 

For STS register bit are cleared by writing 1 into it.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6624 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-02-16 15:36:03 +00:00
parent 8ca9217d04
commit 6eb011b038
1 changed files with 31 additions and 12 deletions
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43
hw/acpi.c
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@ -579,22 +579,25 @@ struct pci_status {
static struct gpe_regs gpe;
static struct pci_status pci0_status;
static uint32_t gpe_read_val(uint16_t val, uint32_t addr)
{
if (addr & 1)
return (val >> 8) & 0xff;
return val & 0xff;
}
static uint32_t gpe_readb(void *opaque, uint32_t addr)
{
uint32_t val = 0;
struct gpe_regs *g = opaque;
switch (addr) {
case GPE_BASE:
val = g->sts & 0xFF;
break;
case GPE_BASE + 1:
val = (g->sts >> 8) & 0xFF;
val = gpe_read_val(g->sts, addr);
break;
case GPE_BASE + 2:
val = g->en & 0xFF;
break;
case GPE_BASE + 3:
val = (g->en >> 8) & 0xFF;
val = gpe_read_val(g->en, addr);
break;
default:
break;
@ -606,21 +609,37 @@ static uint32_t gpe_readb(void *opaque, uint32_t addr)
return val;
}
static void gpe_write_val(uint16_t *cur, int addr, uint32_t val)
{
if (addr & 1)
*cur = (*cur & 0xff) | (val << 8);
else
*cur = (*cur & 0xff00) | (val & 0xff);
}
static void gpe_reset_val(uint16_t *cur, int addr, uint32_t val)
{
uint16_t x1, x0 = val & 0xff;
int shift = (addr & 1) ? 8 : 0;
x1 = (*cur >> shift) & 0xff;
x1 = x1 & ~x0;
*cur = (*cur & (0xff << (8 - shift))) | (x1 << shift);
}
static void gpe_writeb(void *opaque, uint32_t addr, uint32_t val)
{
struct gpe_regs *g = opaque;
switch (addr) {
case GPE_BASE:
g->sts = (g->sts & ~0xFFFF) | (val & 0xFFFF);
break;
case GPE_BASE + 1:
g->sts = (g->sts & 0xFFFF) | (val << 8);
gpe_reset_val(&g->sts, addr, val);
break;
case GPE_BASE + 2:
g->en = (g->en & ~0xFFFF) | (val & 0xFFFF);
break;
case GPE_BASE + 3:
g->en = (g->en & 0xFFFF) | (val << 8);
gpe_write_val(&g->en, addr, val);
break;
default:
break;