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/*
* Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
*
* 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; either version 2 of the
* License, or any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <errno.h>
#include <gpxe/pci.h>
#include <gpxe/efi/efi.h>
#include <gpxe/efi/Protocol/PciRootBridgeIo.h>
/** @file
*
* gPXE PCI I/O API for EFI
*
*/
/** PCI root bridge I/O protocol */
static EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *efipci;
EFI_REQUIRE_PROTOCOL ( EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL, &efipci );
static unsigned long efipci_address ( struct pci_device *pci,
unsigned long location ) {
return EFI_PCI_ADDRESS ( pci->bus, PCI_SLOT ( pci->devfn ),
PCI_FUNC ( pci->devfn ),
EFIPCI_OFFSET ( location ) );
}
int efipci_read ( struct pci_device *pci, unsigned long location,
void *value ) {
EFI_STATUS efirc;
if ( ( efirc = efipci->Pci.Read ( efipci, EFIPCI_WIDTH ( location ),
efipci_address ( pci, location ), 1,
value ) ) != 0 ) {
DBG ( "EFIPCI config read from %02x:%02x.%x offset %02lx "
"failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ),
PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
efi_strerror ( efirc ) );
return -EIO;
}
return 0;
}
int efipci_write ( struct pci_device *pci, unsigned long location,
unsigned long value ) {
EFI_STATUS efirc;
if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ),
efipci_address ( pci, location ), 1,
&value ) ) != 0 ) {
DBG ( "EFIPCI config write to %02x:%02x.%x offset %02lx "
"failed: %s\n", pci->bus, PCI_SLOT ( pci->devfn ),
PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
efi_strerror ( efirc ) );
return -EIO;
}
return 0;
}
PROVIDE_PCIAPI_INLINE ( efi, pci_max_bus );
PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_byte );
PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_word );
PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_dword );
PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_byte );
PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_word );
PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_dword );
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