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/*
* This file is part of the coreboot project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#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
unsigned int pci_io_encode_addr(pci_devfn_t dev, unsigned int where)
{
if (CONFIG(PCI_IO_CFG_EXT)) {
// seg == 0
return dev >> 4 | (where & 0xff) | ((where & 0xf00) << 16);
} else {
return dev >> 4 | where;
}
}
static __always_inline
uint8_t pci_io_read_config8(pci_devfn_t dev, unsigned int where)
{
unsigned int addr = pci_io_encode_addr(dev, where);
outl(0x80000000 | (addr & ~3), 0xCF8);
return inb(0xCFC + (addr & 3));
}
static __always_inline
uint16_t pci_io_read_config16(pci_devfn_t dev, unsigned int where)
{
unsigned int addr = pci_io_encode_addr(dev, where);
outl(0x80000000 | (addr & ~3), 0xCF8);
return inw(0xCFC + (addr & 2));
}
static __always_inline
uint32_t pci_io_read_config32(pci_devfn_t dev, unsigned int where)
{
unsigned int addr = pci_io_encode_addr(dev, where);
outl(0x80000000 | (addr & ~3), 0xCF8);
return inl(0xCFC);
}
static __always_inline
void pci_io_write_config8(pci_devfn_t dev, unsigned int where, uint8_t value)
{
unsigned int addr = pci_io_encode_addr(dev, where);
outl(0x80000000 | (addr & ~3), 0xCF8);
outb(value, 0xCFC + (addr & 3));
}
static __always_inline
void pci_io_write_config16(pci_devfn_t dev, unsigned int where, uint16_t value)
{
unsigned int addr = pci_io_encode_addr(dev, where);
outl(0x80000000 | (addr & ~3), 0xCF8);
outw(value, 0xCFC + (addr & 2));
}
static __always_inline
void pci_io_write_config32(pci_devfn_t dev, unsigned int where, uint32_t value)
{
unsigned int addr = pci_io_encode_addr(dev, where);
outl(0x80000000 | (addr & ~3), 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, unsigned int where)
{
return pci_io_read_config8(dev, where);
}
static __always_inline
uint16_t pci_s_read_config16(pci_devfn_t dev, unsigned int where)
{
return pci_io_read_config16(dev, where);
}
static __always_inline
uint32_t pci_s_read_config32(pci_devfn_t dev, unsigned int where)
{
return pci_io_read_config32(dev, where);
}
static __always_inline
void pci_s_write_config8(pci_devfn_t dev, unsigned int where, uint8_t value)
{
pci_io_write_config8(dev, where, value);
}
static __always_inline
void pci_s_write_config16(pci_devfn_t dev, unsigned int where, uint16_t value)
{
pci_io_write_config16(dev, where, value);
}
static __always_inline
void pci_s_write_config32(pci_devfn_t dev, unsigned int where, uint32_t value)
{
pci_io_write_config32(dev, where, value);
}
#endif
#endif /* _PCI_IO_CFG_H */
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