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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 <ipxe/pci.h>
- #include <ipxe/efi/efi.h>
- #include <ipxe/efi/Protocol/PciRootBridgeIo.h>
-
- /** @file
- *
- * iPXE 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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