diff options
Diffstat (limited to 'include/pci.h')
| -rw-r--r-- | include/pci.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/pci.h b/include/pci.h index 999a594cddf..2b82b2c5a3e 100644 --- a/include/pci.h +++ b/include/pci.h @@ -215,6 +215,10 @@ #define PCI_BASE_ADDRESS_IO_MASK (~0x03ULL) /* bit 1 is reserved if address_space = 1 */ +/* Convert a regsister address (e.g. PCI_BASE_ADDRESS_1) to a bar # (e.g. 1) */ +#define pci_offset_to_barnum(offset) \ + (((offset) - PCI_BASE_ADDRESS_0) / sizeof(u32)) + /* Header type 0 (normal devices) */ #define PCI_CARDBUS_CIS 0x28 #define PCI_SUBSYSTEM_VENDOR_ID 0x2c |