iPXE
pcidirect.c
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00001 /*
00002  * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  *
00019  * You can also choose to distribute this program under the terms of
00020  * the Unmodified Binary Distribution Licence (as given in the file
00021  * COPYING.UBDL), provided that you have satisfied its requirements.
00022  */
00023 
00024 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00025 
00026 #include <ipxe/io.h>
00027 #include <ipxe/pci.h>
00028 
00029 /** @file
00030  *
00031  * PCI configuration space access via Type 1 accesses
00032  *
00033  */
00034 
00035 /**
00036  * Prepare for Type 1 PCI configuration space access
00037  *
00038  * @v pci               PCI device
00039  * @v where             Location within PCI configuration space
00040  */
00041 void pcidirect_prepare ( struct pci_device *pci, int where ) {
00042         uint16_t busdevfn = ( pci->busdevfn & 0xffff );
00043 
00044         outl ( ( 0x80000000 | ( busdevfn << 8 ) | ( where & ~3 ) ),
00045                PCIDIRECT_CONFIG_ADDRESS );
00046 }
00047 
00048 PROVIDE_PCIAPI_INLINE ( direct, pci_num_bus );
00049 PROVIDE_PCIAPI_INLINE ( direct, pci_read_config_byte );
00050 PROVIDE_PCIAPI_INLINE ( direct, pci_read_config_word );
00051 PROVIDE_PCIAPI_INLINE ( direct, pci_read_config_dword );
00052 PROVIDE_PCIAPI_INLINE ( direct, pci_write_config_byte );
00053 PROVIDE_PCIAPI_INLINE ( direct, pci_write_config_word );
00054 PROVIDE_PCIAPI_INLINE ( direct, pci_write_config_dword );