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Add basic APM functionality for PIIX/PIIX3 and i430FX, i430VX, i430HX

Browse source 
and i440FX chipsets.
This commit is contained in:
SarahW 2020-11-01 14:46:56 +00:00
commit 38cee364d3
7 changed files with 233 additions and 8 deletions
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38
src/i440fx.c
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@ -106,6 +106,30 @@ void i440fx_write(int func, int addr, uint8_t val, void *priv)
i440fx_map(0xec000, 0x04000, val >> 4);
pclog("i440fx_write : PAM6 write %02X\n", val);
break;
case 0x72: /*SMRAM*/
pclog("Write SMRAM %02x\n", val);
val = (val & 0x78) | 2; /*SMRAM always at A0000-BFFFF*/
val |= (card_i440fx[0x72] & 0x10); /*D_LCK can not be cleared by software*/
if (val & 0x10) /*D_LCK locks D_OPEN and G_SMRAME*/
{
val &= ~0x48; /*D_OPEN is forced to 0, G_SMRAME is read only*/
val |= (card_i440fx[0x72] & 0x08);
}
if ((card_i440fx[0x72] ^ val) & 0x40)
{
if (val & 0x40) /*SMRAM enabled*/
{
pclog("Enable SMRAM\n");
mem_set_mem_state(0xa0000, 0x20000, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
}
else
{
pclog("Disable SMRAM\n");
mem_set_mem_state(0xa0000, 0x20000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
}
}
break;
}
card_i440fx[addr] = val;
@ -119,6 +143,17 @@ uint8_t i440fx_read(int func, int addr, void *priv)
return card_i440fx[addr];
}
static void i440fx_smram_enable(void)
{
if (card_i440fx[0x72] & 8)
mem_set_mem_state(0xa0000, 0x20000, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
}
static void i440fx_smram_disable(void)
{
if (card_i440fx[0x72] & 8)
mem_set_mem_state(0xa0000, 0x20000, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
}
void i440fx_init()
{
pci_add_specific(0, i440fx_read, i440fx_write, NULL);
@ -137,6 +172,9 @@ void i440fx_init()
card_i440fx[0x60] = card_i440fx[0x61] = card_i440fx[0x62] = card_i440fx[0x63] = card_i440fx[0x64] = 0x01;
card_i440fx[0x71] = 0x10;
card_i440fx[0x72] = 0x02;
smram_enable = i440fx_smram_enable;
smram_disable = i440fx_smram_disable;
}
void i440fx_reset()