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Commit	Line	Data
	1	/*
	2	* Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights
	7	* Reserved. This file contains Original Code and/or Modifications of
	8	* Original Code as defined in and that are subject to the Apple Public
	9	* Source License Version 2.0 (the "License"). You may not use this file
	10	* except in compliance with the License. Please obtain a copy of the
	11	* License at http://www.apple.com/publicsource and read it before using
	12	* this file.
	13	*
	14	* The Original Code and all software distributed under the License are
	15	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	16	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	17	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the
	19	* License for the specific language governing rights and limitations
	20	* under the License.
	21	*
	22	* @APPLE_LICENSE_HEADER_END@
	23	*/
	24	/*
	25	* Mach Operating System
	26	* Copyright (c) 1990 Carnegie-Mellon University
	27	* Copyright (c) 1989 Carnegie-Mellon University
	28	* All rights reserved. The CMU software License Agreement specifies
	29	* the terms and conditions for use and redistribution.
	30	*/
	31
	32	/*
	33	* INTEL CORPORATION PROPRIETARY INFORMATION
	34	*
	35	* This software is supplied under the terms of a license agreement or
	36	* nondisclosure agreement with Intel Corporation and may not be copied
	37	* nor disclosed except in accordance with the terms of that agreement.
	38	*
	39	* Copyright 1988, 1989 Intel Corporation
	40	*/
	41
	42	/*
	43	* Copyright 1993 NeXT, Inc.
	44	* All rights reserved.
	45	*/
	46
	47	#include "libsaio.h"
	48
	49	/*
	50	* keyboard controller (8042) I/O port addresses
	51	*/
	52	#define PORT_A 0x60 /* port A */
	53	#define PORT_B 0x64 /* port B */
	54
	55	/*
	56	* keyboard controller command
	57	*/
	58	#define CMD_WOUT 0xd1 /* write controller's output port */
	59
	60	/*
	61	* keyboard controller status flags
	62	*/
	63	#define KB_INFULL 0x2 /* input buffer full */
	64	#define KB_OUTFULL 0x1 /* output buffer full */
	65
	66	#define KB_A20 0x9f /* enable A20,
	67	enable output buffer full interrupt
	68	enable data line
	69	disable clock line */
	70
	71	//==========================================================================
	72	// Enable A20 gate to be able to access memory above 1MB
	73
	74	void enableA20()
	75	{
	76	/* make sure that the input buffer is empty */
	77	while (inb(PORT_B) & KB_INFULL);
	78
	79	/* make sure that the output buffer is empty */
	80	if (inb(PORT_B) & KB_OUTFULL)
	81	(void)inb(PORT_A);
	82
	83	/* make sure that the input buffer is empty */
	84	while (inb(PORT_B) & KB_INFULL);
	85
	86	/* write output port */
	87	outb(PORT_B, CMD_WOUT);
	88	delay(100);
	89
	90	/* wait until command is accepted */
	91	while (inb(PORT_B) & KB_INFULL);
	92
	93	outb(PORT_A, KB_A20);
	94	delay(100);
	95
	96	while (inb(PORT_B) & KB_INFULL); /* wait until done */
	97	}
	98
	99	static inline void
	100	do_cpuid(uint32_t selector, uint32_t *data)
	101	{
	102	asm volatile ("cpuid"
	103	: "=a" (data[0]),
	104	"=b" (data[1]),
	105	"=c" (data[2]),
	106	"=d" (data[3])
	107	: "a"(selector));
	108	}
	109
	110
	111	//==========================================================================
	112	// Check to see that this is a supported hardware configuration.
	113	// If this hardware is supported, return 0.
	114	// If this hardware is not supported, return an error code.
	115
	116	int
	117	checkForSupportedHardware()
	118	{
	119	uint32_t cpuid_result[4];
	120
	121	do_cpuid(1, cpuid_result);
	122	if ((cpuid_result[3] & 0x04000000) == 0) {
	123	// Missing SSE2
	124	return 2;
	125	}
	126	return 0;
	127	}
	128
	129	#ifndef BOOT1
	130
	131	//==========================================================================
	132	// Return the platform name for this hardware.
	133	//
	134
	135	void
	136	getPlatformName(char *nameBuf)
	137	{
	138	strcpy(nameBuf, "ACPI");
	139	}
	140
	141	#endif
	142