bios.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/controlregs.h>
#include <sys/bootconf.h>
#include <sys/bootvfs.h>
#include <sys/psw.h>
#include "biosint.h"
#include "machine.h"
#include "standalloc.h"
#include "console.h"
#include "util.h"
#include "debug.h"
#define PCI_FUNCTION_ID 0xB1
#define PCI_BIOS_PRESENT 0x1
#define dprintf if (debug & D_BIOS) printf
extern int openfile(char *, int);
int (*bios_doint)(int, struct int_pb *);
static void
pci_check_bios(void)
{
int ret;
struct int_pb ic = {0};
ic.ax = (PCI_FUNCTION_ID << 8) | PCI_BIOS_PRESENT;
ret = bios_doint(0x1a, &ic);
if (ret & PS_C)
printf("bios_doint failed: %d\r\n", ret);
dprintf("bios_doint returned: %d\r\n", ret);
dprintf("ic.ax = 0x%x\r\n", (int)ic.ax);
dprintf("ic.dx = 0x%x\r\n", (int)ic.dx);
}
void
init_biosprog()
{
int fd;
char *buf = (char *)0x2000;
ssize_t count;
/* read biosint program to pfn 2 */
fd = openfile("biosint", 0);
if (fd == -1) {
printf("cannot open biosint\n");
return;
}
count = read(fd, buf, PAGESIZE);
if (count <= 0) {
printf("cannot read biosint\n");
return;
}
bios_doint = (int (*)(int, struct int_pb *))(buf);
dprintf("biosint loaded at 0x%x: %d bytes\r\n", buf, count);
if (debug & D_BIOS) /* run a check if debug */
pci_check_bios();
if (verbosemode)
printf("bios service program installed\n");
}