ide.c

Uboot源码,非常通用的bootloader.适用于各种平台的Linux系统引导.

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 (at your option) 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */
/* ide.c - ide support functions */


#include <common.h>
#ifdef CFG_CMD_IDE
#include <ata.h>
#include <ide.h>
#include <pci.h>

extern ulong ide_bus_offset[CFG_IDE_MAXBUS];

int ide_preinit (void)
{
	int status;
	pci_dev_t devbusfn;
	int l;

	status = 1;
	for (l = 0; l < CFG_IDE_MAXBUS; l++) {
		ide_bus_offset[l] = -ATA_STATUS;
	}
	devbusfn = pci_find_device (0x1103, 0x0004, 0);
	if (devbusfn != -1) {
		status = 0;

		pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0,
				       (u32 *) & ide_bus_offset[0]);
		ide_bus_offset[0] &= 0xfffffffe;
		ide_bus_offset[0] += CFG_PCI0_IO_SPACE;
		pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_2,
				       (u32 *) & ide_bus_offset[1]);
		ide_bus_offset[1] &= 0xfffffffe;
		ide_bus_offset[1] += CFG_PCI0_IO_SPACE;
	}
	return (status);
}

void ide_set_reset (int flag) {
	return;
}

#endif /* of CONFIG_CMDS_IDE */