ipxe/src/arch/i386/core/pcidirect.c

/*
 * Copyright (C) 2006 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.
 */

#include <gpxe/pci.h>
#include <pcidirect.h>

/** @file
 *
 * PCI configuration space access via Type 1 accesses
 *
 */

/**
 * Prepare for Type 1 PCI configuration space access
 *
 * @v pci		PCI device
 * @v where	Location within PCI configuration space
 */
void pcidirect_prepare ( struct pci_device *pci, int where ) {
	outl ( ( 0x80000000 | ( pci->bus << 16 ) | ( pci->devfn << 8 ) |
		 ( where & ~3 ) ), PCIDIRECT_CONFIG_ADDRESS );
}