80486DX2-66/86Box-fork
1
0
Fork 0
Code Issues Pull Requests Activity

Added a sanity check on write to PIIX4(E) DDMA base PCI registers.

Browse Source
This commit is contained in:
OBattler
2020-09-08 03:42:42 +02:00
parent 96eb247e9a
commit 2569bcbf43
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/chipset/intel_piix.c
View File

@@ -275,6 +275,7 @@ piix_write(int func, int addr, uint8_t val, void *priv)
{
piix_t *dev = (piix_t *) priv;
uint8_t *fregs;
uint16_t base;
int i;
/* Return on unsupported function. */
@@ -443,8 +444,11 @@ piix_write(int func, int addr, uint8_t val, void *priv)
else
fregs[addr] = val & 0xc0;
base = fregs[addr | 0x01] << 8;
base |= fregs[addr & 0xfe];
for (i = 0; i < 4; i++)
ddma_update_io_mapping(dev->ddma, (addr & 4) + i, fregs[addr & 0xfe] + (i << 4), fregs[addr | 0x01], 1);
ddma_update_io_mapping(dev->ddma, (addr & 4) + i, fregs[addr & 0xfe] + (i << 4), fregs[addr | 0x01], (base != 0x0000));
}
break;
case 0xa0: