diff options
Diffstat (limited to 'src/arch/x86/pci_ops_mmconf.c')
-rw-r--r-- | src/arch/x86/pci_ops_mmconf.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/arch/x86/pci_ops_mmconf.c b/src/arch/x86/pci_ops_mmconf.c new file mode 100644 index 0000000000..e4fa128551 --- /dev/null +++ b/src/arch/x86/pci_ops_mmconf.c @@ -0,0 +1,61 @@ +#include <console/console.h> +#include <arch/io.h> +#include <arch/pciconf.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> + +/* + * Functions for accessing PCI configuration space with mmconf accesses + */ + +#define PCI_MMIO_ADDR(SEGBUS, DEVFN, WHERE, MASK) \ + ((void *)(((uintptr_t)CONFIG_MMCONF_BASE_ADDRESS |\ + (((SEGBUS) & 0xFFF) << 20) |\ + (((DEVFN) & 0xFF) << 12) |\ + ((WHERE) & 0xFFF)) & ~MASK)) + +static uint8_t pci_mmconf_read_config8(struct bus *pbus, int bus, int devfn, + int where) +{ + return read8(PCI_MMIO_ADDR(bus, devfn, where, 0)); +} + +static uint16_t pci_mmconf_read_config16(struct bus *pbus, int bus, int devfn, + int where) +{ + return read16(PCI_MMIO_ADDR(bus, devfn, where, 1)); +} + +static uint32_t pci_mmconf_read_config32(struct bus *pbus, int bus, int devfn, + int where) +{ + return read32(PCI_MMIO_ADDR(bus, devfn, where, 3)); +} + +static void pci_mmconf_write_config8(struct bus *pbus, int bus, int devfn, + int where, uint8_t value) +{ + write8(PCI_MMIO_ADDR(bus, devfn, where, 0), value); +} + +static void pci_mmconf_write_config16(struct bus *pbus, int bus, int devfn, + int where, uint16_t value) +{ + write16(PCI_MMIO_ADDR(bus, devfn, where, 1), value); +} + +static void pci_mmconf_write_config32(struct bus *pbus, int bus, int devfn, + int where, uint32_t value) +{ + write32(PCI_MMIO_ADDR(bus, devfn, where, 3), value); +} + +const struct pci_bus_operations pci_ops_mmconf = { + .read8 = pci_mmconf_read_config8, + .read16 = pci_mmconf_read_config16, + .read32 = pci_mmconf_read_config32, + .write8 = pci_mmconf_write_config8, + .write16 = pci_mmconf_write_config16, + .write32 = pci_mmconf_write_config32, +}; |