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pci empty device read fix - piix3 ide init 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@854 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-05-23 19:12:03 +00:00
parent e1c485be84
commit 63ce9e0a42
1 changed files with 27 additions and 8 deletions
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25
hw/pci.c
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@ -316,7 +316,18 @@ static uint32_t pci_data_read(void *opaque, uint32_t addr,
pci_dev = bus[(s->config_reg >> 8) & 0xff];
if (!pci_dev) {
fail:
val = 0;
switch(len) {
case 1:
val = 0xff;
break;
case 2:
val = 0xffff;
break;
default:
case 4:
val = 0xffffffff;
break;
}
goto the_end;
}
config_addr = (s->config_reg & 0xfc) | (addr & 3);
@ -682,16 +693,24 @@ static void pci_bios_init_device(PCIDevice *d)
int class;
PCIIORegion *r;
uint32_t *paddr;
int i, pin, pic_irq;
int i, pin, pic_irq, vendor_id, device_id;
class = d->config[0x0a] | (d->config[0x0b] << 8);
class = pci_config_readw(d, PCI_CLASS_DEVICE);
switch(class) {
case 0x0101:
vendor_id = pci_config_readw(d, PCI_VENDOR_ID);
device_id = pci_config_readw(d, PCI_DEVICE_ID);
if (vendor_id == 0x8086 && device_id == 0x7010) {
/* PIIX3 IDE */
pci_config_writew(d, PCI_COMMAND, PCI_COMMAND_IO);
pci_config_writew(d, 0x40, 0x8000); // enable IDE0
} else {
/* IDE: we map it as in ISA mode */
pci_set_io_region_addr(d, 0, 0x1f0);
pci_set_io_region_addr(d, 1, 0x3f4);
pci_set_io_region_addr(d, 2, 0x170);
pci_set_io_region_addr(d, 3, 0x374);
}
break;
case 0x0300:
/* VGA: map frame buffer to default Bochs VBE address */