diff options
Diffstat (limited to 'kernel/drivers/pci.c')
| -rw-r--r-- | kernel/drivers/pci.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/kernel/drivers/pci.c b/kernel/drivers/pci.c index 464d400..1dc7047 100644 --- a/kernel/drivers/pci.c +++ b/kernel/drivers/pci.c @@ -18,6 +18,12 @@ u8 pci_get_bar(const struct PCI_DEVICE *device, u8 bar_index, } u8 offset = 0x10 + bar_index * sizeof(u32); u32 physical_bar = pci_config_read32(device, 0, offset); + u8 type; + if (physical_bar & 0x1) { + type = PCI_BAR_IO; + } else { + type = PCI_BAR_MEM; + } u32 original_bar = physical_bar; physical_bar &= 0xFFFFFFF0; // Now we do the konami code of PCI devices to figure out the size of what @@ -26,9 +32,9 @@ u8 pci_get_bar(const struct PCI_DEVICE *device, u8 bar_index, // Comments taken from https://wiki.osdev.org/PCI#Address_and_size_of_the_BAR // write a value of all 1's to the register, - pci_config_write32(device, 0, 0x24, 0xFFFFFFFF); + pci_config_write32(device, 0, offset, 0xFFFFFFFF); // then read it back. - u32 bar_result = pci_config_read32(device, 0, 0x24); + u32 bar_result = pci_config_read32(device, 0, offset); // The amount of memory can then be determined by masking the information // bits, @@ -43,10 +49,11 @@ u8 pci_get_bar(const struct PCI_DEVICE *device, u8 bar_index, bar_result++; // Restore the old result - pci_config_write32(device, 0, 0x24, original_bar); + pci_config_write32(device, 0, offset, original_bar); bar->address = physical_bar; bar->size = bar_result; + bar->type = type; return 1; } |