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/* $OpenBSD: machdep.c,v 1.17 1997/10/12 21:14:23 mickey Exp $ */
/*
* Copyright (c) 1997 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Michael Shalayeff.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* APM derived from: apm_init.S, LP (Laptop Package)
* wich contained this:
* Copyright (C) 1994 by HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
*
*/
/*
* If you want to know the specification of APM BIOS, see the following
* documentations,
*
* [1] Intel Corporation and Microsoft Corporation, "Advanced Power
* Management, The Next Generation, Version 1.0", Feb.,1992.
*
* [2] Intel Corporation and Microsoft Corporation, "Advanced Power
* Management (APM) BIOS Interface Specification Revision 1.1",
* Sep.,1993, Intel Order Number: 241704-001, Microsoft Part
* Number: 781-110-X01
*
* or contact
*
* APM Support Desk (Intel Corporation, US)
* TEL: (800)628-8686
* FAX: (916)356-6100.
*/
#include "libsa.h"
#include <machine/apmvar.h>
#include <machine/biosvar.h>
#include "debug.h"
struct BIOS_regs BIOS_regs;
struct BIOS_vars BIOS_vars;
int bootdev;
#ifdef DEBUG
#define CKPT(c) (*(u_int16_t*)0xb8148 = 0x4700 + (c))
#else
#define CKPT(c) /* c */
#endif
static __inline u_int
apm_check()
{
register u_int detail;
register u_int8_t f;
__asm __volatile(DOINT(0x15) "\n\t"
"setc %b1\n\t"
"movzwl %%ax, %0\n\t"
"shll $16, %%ecx\n\t"
"orl %%ecx, %0"
: "=a" (detail), "=b" (f)
: "0" (APM_INSTCHECK), "1" (APM_DEV_APM_BIOS)
: "%ecx", "cc");
if (f || BIOS_regs.biosr_bx != 0x504d /* "PM" */ ) {
#ifdef DEBUG
printf("apm_check: %x, %x, %x\n",
f, BIOS_regs.biosr_bx, detail);
#endif
return 0;
} else
return detail;
}
static __inline int
apm_disconnect()
{
register u_int16_t rv;
__asm __volatile(DOINT(0x15) "\n\t"
"setc %b0"
: "=a" (rv)
: "0" (APM_DISCONNECT), "b" (APM_DEV_APM_BIOS)
: "%ecx", "%edx", "cc");
return (rv & 0xff)? rv >> 8 : 0;
}
static __inline int
apm_connect()
{
register u_int16_t f;
__asm __volatile (DOINT(0x15) "\n\t"
"setc %b1\n\t"
"movb %%ah, %h1\n\t"
"movzwl %%ax, %%eax\n\tshll $4, %0\n\t"
"movzwl %%cx, %%ecx\n\tshll $4, %2\n\t"
"movzwl %%dx, %%edx\n\tshll $4, %3\n\t"
: "=a" (BIOS_vars.bios_apm_code32_base),
"=b" (f),
"=c" (BIOS_vars.bios_apm_code16_base),
"=d" (BIOS_vars.bios_apm_data_base)
: "0" (APM_PROT32_CONNECT), "1" (APM_DEV_APM_BIOS)
: "cc");
BIOS_vars.bios_apm_entry = BIOS_regs.biosr_bx;
#if 0
BIOS_vars.bios_apm_code_len = BIOS_regs.biosr_si & 0xffff;
BIOS_vars.bios_apm_data_len = BIOS_regs.biosr_di & 0xffff;
#else
BIOS_vars.bios_apm_code_len = 0x10000;
BIOS_vars.bios_apm_data_len = 0x10000;
#endif
return (f & 0xff)? f >> 8 : 0;
}
void
machdep()
{
/* here */ CKPT('0');
gateA20(1); CKPT('1');
debug_init(); CKPT('2');
/* call console init before doing any io */
cninit(); CKPT('3');
#ifndef _TEST
memprobe(); CKPT('4');
#endif
if ((BIOS_vars.bios_apm_detail = apm_check())) {
printf("apm0");
apm_disconnect();
if (apm_connect() != 0)
printf(": connect error\n");
#ifdef DEBUG
printf(": %x text=%x/%x[%x] data=%x[%x] @ %x",
BIOS_vars.bios_apm_detail,
BIOS_vars.bios_apm_code32_base,
BIOS_vars.bios_apm_code16_base,
BIOS_vars.bios_apm_code_len,
BIOS_vars.bios_apm_data_base,
BIOS_vars.bios_apm_data_len,
BIOS_vars.bios_apm_entry);
#else
printf(" detected");
#endif
putchar('\n');
}
CKPT('9');
}
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