diff options
Diffstat (limited to 'include/pci.h')
| -rw-r--r-- | include/pci.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/pci.h b/include/pci.h index 797f224e2f..6c1094d729 100644 --- a/include/pci.h +++ b/include/pci.h @@ -522,6 +522,32 @@ #include <pci_ids.h> +/* + * Enhanced Configuration Access Mechanism (ECAM) + * + * See PCI Express Base Specification, Revision 5.0, Version 1.0, + * Section 7.2.2, Table 7-1, p. 677. + */ +#define PCIE_ECAM_BUS_SHIFT 20 /* Bus number */ +#define PCIE_ECAM_DEV_SHIFT 15 /* Device number */ +#define PCIE_ECAM_FUNC_SHIFT 12 /* Function number */ + +#define PCIE_ECAM_BUS_MASK 0xff +#define PCIE_ECAM_DEV_MASK 0x1f +#define PCIE_ECAM_FUNC_MASK 0x7 +#define PCIE_ECAM_REG_MASK 0xfff /* Limit offset to a maximum of 4K */ + +#define PCIE_ECAM_BUS(x) (((x) & PCIE_ECAM_BUS_MASK) << PCIE_ECAM_BUS_SHIFT) +#define PCIE_ECAM_DEV(x) (((x) & PCIE_ECAM_DEV_MASK) << PCIE_ECAM_DEV_SHIFT) +#define PCIE_ECAM_FUNC(x) (((x) & PCIE_ECAM_FUNC_MASK) << PCIE_ECAM_FUNC_SHIFT) +#define PCIE_ECAM_REG(x) ((x) & PCIE_ECAM_REG_MASK) + +#define PCIE_ECAM_OFFSET(bus, dev, func, where) \ + (PCIE_ECAM_BUS(bus) | \ + PCIE_ECAM_DEV(dev) | \ + PCIE_ECAM_FUNC(func) | \ + PCIE_ECAM_REG(where)) + #ifndef __ASSEMBLY__ #include <dm/pci.h> |