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Source at commit 304 created 13 years 11 months ago. By zef, Fixed cache size configuration in msdos.c. | |
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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 | static inline void flushKeyboardInputBuffer()␊ |
75 | {␊ |
76 | unsigned char ret;␊ |
77 | /* Apparently all flags on means that they're invalid and that the code␊ |
78 | should stop trying to check them because they'll never change */␊ |
79 | do␊ |
80 | {␊ |
81 | ret = inb(PORT_B);␊ |
82 | } while( (ret != 0xff) && (ret & KB_INFULL));␊ |
83 | }␊ |
84 | ␊ |
85 | void enableA20()␊ |
86 | {␊ |
87 | /* make sure that the input buffer is empty */␊ |
88 | flushKeyboardInputBuffer();␊ |
89 | ␊ |
90 | /* make sure that the output buffer is empty */␊ |
91 | if (inb(PORT_B) & KB_OUTFULL)␊ |
92 | (void)inb(PORT_A);␊ |
93 | ␊ |
94 | /* make sure that the input buffer is empty */␊ |
95 | flushKeyboardInputBuffer();␊ |
96 | ␊ |
97 | /* write output port */␊ |
98 | outb(PORT_B, CMD_WOUT);␊ |
99 | delay(100);␊ |
100 | ␊ |
101 | /* wait until command is accepted */␊ |
102 | flushKeyboardInputBuffer();␊ |
103 | ␊ |
104 | outb(PORT_A, KB_A20);␊ |
105 | delay(100);␊ |
106 | ␊ |
107 | /* wait until done */␊ |
108 | flushKeyboardInputBuffer();␊ |
109 | }␊ |
110 | ␊ |
111 | //==========================================================================␊ |
112 | // Return the platform name for this hardware.␊ |
113 | //␊ |
114 | #ifndef BOOT1␊ |
115 | void␊ |
116 | getPlatformName(char *nameBuf)␊ |
117 | {␊ |
118 | strcpy(nameBuf, "ACPI");␊ |
119 | }␊ |
120 | #endif␊ |
121 |