diff options
Diffstat (limited to 'hw/ide/via.c')
| -rw-r--r-- | hw/ide/via.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/hw/ide/via.c b/hw/ide/via.c index 2d3124ebd7..3f3c484253 100644 --- a/hw/ide/via.c +++ b/hw/ide/via.c @@ -163,14 +163,19 @@ static uint32_t via_ide_cfg_read(PCIDevice *pd, uint32_t addr, int len) uint32_t val = pci_default_read_config(pd, addr, len); uint8_t mode = pd->config[PCI_CLASS_PROG]; - if ((mode & 0xf) == 0xa && ranges_overlap(addr, len, - PCI_BASE_ADDRESS_0, 16)) { - /* BARs always read back zero in legacy mode */ - for (int i = addr; i < addr + len; i++) { - if (i >= PCI_BASE_ADDRESS_0 && i < PCI_BASE_ADDRESS_0 + 16) { - val &= ~(0xffULL << ((i - addr) << 3)); + if ((mode & 0xf) == 0xa) { + if (ranges_overlap(addr, len, PCI_BASE_ADDRESS_0, 16)) { + /* BARs 0-3 always read back zero in legacy mode */ + for (int i = addr; i < addr + len; i++) { + if (i >= PCI_BASE_ADDRESS_0 && i < PCI_BASE_ADDRESS_0 + 16) { + val &= ~(0xffULL << ((i - addr) << 3)); + } } } + if (addr == PCI_BASE_ADDRESS_4 && val == PCI_BASE_ADDRESS_SPACE_IO) { + /* BAR4 default value if unset */ + val = 0xcc00 | PCI_BASE_ADDRESS_SPACE_IO; + } } return val; |