switch-coreboot/arch/x86/pci_ops_mmconf.c

#include <console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <types.h>


/*
 * Functions for accessing PCI configuration space with mmconf accesses
 */

#define PCI_MMIO_ADDR(SEGBUS, DEVFN, WHERE) ( \
        (((SEGBUS) & 0xFFF) << 20) | \
        (((DEVFN) & 0xFF) << 12) | \
        ((WHERE) & 0xFFF))

#include <mmio_conf.h>

static u8 pci_mmconf_read_config8(struct bus *pbus, int bus, int devfn, int where)
{
		return (read8x(PCI_MMIO_ADDR(bus, devfn, where)));
}

static u16 pci_mmconf_read_config16(struct bus *pbus, int bus, int devfn, int where)
{
                return (read16x(PCI_MMIO_ADDR(bus, devfn, where)));
}

static u32 pci_mmconf_read_config32(struct bus *pbus, int bus, int devfn, int where)
{
                return (read32x(PCI_MMIO_ADDR(bus, devfn, where)));
}

static void  pci_mmconf_write_config8(struct bus *pbus, int bus, int devfn, int where, u8 value)
{
                write8x(PCI_MMIO_ADDR(bus, devfn, where), value);
}

static void pci_mmconf_write_config16(struct bus *pbus, int bus, int devfn, int where, u16 value)
{
                write8x(PCI_MMIO_ADDR(bus, devfn, where), value);
}

static void pci_mmconf_write_config32(struct bus *pbus, int bus, int devfn, int where, u32 value)
{
                write8x(PCI_MMIO_ADDR(bus, devfn, where), 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,
};