switch-coreboot/arch/x86/pci_ops_conf2.c

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

/*
 * Functions for accessing PCI configuration space with type 2 accesses
 */

#define IOADDR(devfn, where)	((0xC000 | ((devfn & 0x78) << 5)) + where)
#define FUNC(devfn)		(((devfn & 7) << 1) | 0xf0)
#define SET(bus,devfn)		outb(FUNC(devfn), 0xCF8); outb(bus, 0xCFA);

static u8 pci_conf2_read_config8(struct bus *pbus, int bus, int devfn, int where)
{
	u8 value;
	SET(bus, devfn);
	value = inb(IOADDR(devfn, where));
	outb(0, 0xCF8);
	return value;
}

static u16 pci_conf2_read_config16(struct bus *pbus, int bus, int devfn, int where)
{
	u16 value;
	SET(bus, devfn);
	value = inw(IOADDR(devfn, where));
	outb(0, 0xCF8);
	return value;
}

static u32 pci_conf2_read_config32(struct bus *pbus, int bus, int devfn, int where)
{
	u32 value;
	SET(bus, devfn);
	value = inl(IOADDR(devfn, where));
	outb(0, 0xCF8);
	return value;
}

static void pci_conf2_write_config8(struct bus *pbus, int bus, int devfn, int where, u8 value)
{
	SET(bus, devfn);
	outb(value, IOADDR(devfn, where));
	outb(0, 0xCF8);
}

static void pci_conf2_write_config16(struct bus *pbus, int bus, int devfn, int where, u16 value)
{
	SET(bus, devfn);
	outw(value, IOADDR(devfn, where));
	outb(0, 0xCF8);
}

static void pci_conf2_write_config32(struct bus *pbus, int bus, int devfn, int where, u32 value)
{
	SET(bus, devfn);
	outl(value, IOADDR(devfn, where));
	outb(0, 0xCF8);
}

#undef SET
#undef IOADDR
#undef FUNC

struct pci_bus_operations pci_cf8_conf2 =
{
	.read8  = pci_conf2_read_config8,
	.read16 = pci_conf2_read_config16,
	.read32 = pci_conf2_read_config32,
	.write8  = pci_conf2_write_config8,
	.write16 = pci_conf2_write_config16,
	.write32 = pci_conf2_write_config32,
};