82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
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/*
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* Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <errno.h>
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#include <gpxe/pci.h>
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#include <gpxe/efi/efi.h>
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#include <gpxe/efi/Protocol/PciRootBridgeIo.h>
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/** @file
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*
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* gPXE PCI I/O API for EFI
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*
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*/
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/** PCI root bridge I/O protocol */
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static EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *efipci;
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EFI_REQUIRE_PROTOCOL ( EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL, &efipci );
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static unsigned long efipci_address ( struct pci_device *pci,
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unsigned long location ) {
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return EFI_PCI_ADDRESS ( pci->bus, PCI_SLOT ( pci->devfn ),
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PCI_FUNC ( pci->devfn ),
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EFIPCI_OFFSET ( location ) );
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}
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int efipci_read ( struct pci_device *pci, unsigned long location,
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void *value ) {
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EFI_STATUS efirc;
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if ( ( efirc = efipci->Pci.Read ( efipci, EFIPCI_WIDTH ( location ),
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efipci_address ( pci, location ), 1,
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value ) ) != 0 ) {
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DBG ( "EFIPCI config read from %02x:%02x.%x offset %02lx "
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"failed: %lx\n", pci->bus, PCI_SLOT ( pci->devfn ),
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PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
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efirc );
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return -EIO;
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}
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return 0;
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}
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int efipci_write ( struct pci_device *pci, unsigned long location,
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unsigned long value ) {
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EFI_STATUS efirc;
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if ( ( efirc = efipci->Pci.Write ( efipci, EFIPCI_WIDTH ( location ),
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efipci_address ( pci, location ), 1,
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&value ) ) != 0 ) {
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DBG ( "EFIPCI config write to %02x:%02x.%x offset %02lx "
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"failed: %lx\n", pci->bus, PCI_SLOT ( pci->devfn ),
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PCI_FUNC ( pci->devfn ), EFIPCI_OFFSET ( location ),
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efirc );
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return -EIO;
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}
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return 0;
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}
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PROVIDE_PCIAPI_INLINE ( efi, pci_max_bus );
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PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_byte );
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PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_word );
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PROVIDE_PCIAPI_INLINE ( efi, pci_read_config_dword );
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PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_byte );
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PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_word );
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PROVIDE_PCIAPI_INLINE ( efi, pci_write_config_dword );
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