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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#ifndef _PCI_IO_CFG_H
#define _PCI_IO_CFG_H
#include <stdint.h>
#include <arch/io.h>
#include <device/pci_type.h>
static __always_inline
uint32_t pci_io_encode_addr(pci_devfn_t dev, uint16_t reg)
{
uint32_t addr = 1 << 31;
addr |= dev >> 4;
addr |= reg & 0xfc;
if (CONFIG(PCI_IO_CFG_EXT))
addr |= (reg & 0xf00) << 16;
return addr;
}
static __always_inline
uint8_t pci_io_read_config8(pci_devfn_t dev, uint16_t reg)
{
uint32_t addr = pci_io_encode_addr(dev, reg);
outl(addr, 0xCF8);
return inb(0xCFC + (reg & 3));
}
static __always_inline
uint16_t pci_io_read_config16(pci_devfn_t dev, uint16_t reg)
{
uint32_t addr = pci_io_encode_addr(dev, reg);
outl(addr, 0xCF8);
return inw(0xCFC + (reg & 2));
}
static __always_inline
uint32_t pci_io_read_config32(pci_devfn_t dev, uint16_t reg)
{
uint32_t addr = pci_io_encode_addr(dev, reg);
outl(addr, 0xCF8);
return inl(0xCFC);
}
static __always_inline
void pci_io_write_config8(pci_devfn_t dev, uint16_t reg, uint8_t value)
{
uint32_t addr = pci_io_encode_addr(dev, reg);
outl(addr, 0xCF8);
outb(value, 0xCFC + (reg & 3));
}
static __always_inline
void pci_io_write_config16(pci_devfn_t dev, uint16_t reg, uint16_t value)
{
uint32_t addr = pci_io_encode_addr(dev, reg);
outl(addr, 0xCF8);
outw(value, 0xCFC + (reg & 2));
}
static __always_inline
void pci_io_write_config32(pci_devfn_t dev, uint16_t reg, uint32_t value)
{
uint32_t addr = pci_io_encode_addr(dev, reg);
outl(addr, 0xCF8);
outl(value, 0xCFC);
}
#if !CONFIG(MMCONF_SUPPORT)
/* Avoid name collisions as different stages have different signature
* for these functions. The _s_ stands for simple, fundamental IO or
* MMIO variant.
*/
static __always_inline
uint8_t pci_s_read_config8(pci_devfn_t dev, uint16_t reg)
{
return pci_io_read_config8(dev, reg);
}
static __always_inline
uint16_t pci_s_read_config16(pci_devfn_t dev, uint16_t reg)
{
return pci_io_read_config16(dev, reg);
}
static __always_inline
uint32_t pci_s_read_config32(pci_devfn_t dev, uint16_t reg)
{
return pci_io_read_config32(dev, reg);
}
static __always_inline
void pci_s_write_config8(pci_devfn_t dev, uint16_t reg, uint8_t value)
{
pci_io_write_config8(dev, reg, value);
}
static __always_inline
void pci_s_write_config16(pci_devfn_t dev, uint16_t reg, uint16_t value)
{
pci_io_write_config16(dev, reg, value);
}
static __always_inline
void pci_s_write_config32(pci_devfn_t dev, uint16_t reg, uint32_t value)
{
pci_io_write_config32(dev, reg, value);
}
#endif
#endif /* _PCI_IO_CFG_H */
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