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 | #ifndef __BOOT_MEMORY_H␊ |
26 | #define __BOOT_MEMORY_H␊ |
27 | ␊ |
28 | /* Memory addresses used by booter and friends */␊ |
29 | ␊ |
30 | /* DFE 2007-12-21: Changed BASE_SEG to be conditional␊ |
31 | This allows boot1u and other planned first-stage booters to avoid␊ |
32 | maintaining their own copies of asm.s and bios.s and instead␊ |
33 | simply build the files from libsaio with the right preprocessor␊ |
34 | definitions.␊ |
35 | ␊ |
36 | This affects BASE_ADDR and OFFSET16() thus obviating the need for␊ |
37 | separate BASE1U_ADDR and OFFSET1U16() macros.␊ |
38 | ␊ |
39 | Be careful though as changing these values with preprocessor macros␊ |
40 | obviously requires rebuilding the source files. That means in particular␊ |
41 | that libsaio.a is only suitable for boot2.␊ |
42 | */␊ |
43 | #if defined(BASE_SEG)␊ |
44 | /* assume user knows what he's doing */␊ |
45 | #elif defined(BOOT1)␊ |
46 | # define BASE_SEG BOOT1U_SEG␊ |
47 | #else␊ |
48 | # define BASE_SEG BOOT2_SEG␊ |
49 | #endif␊ |
50 | ␊ |
51 | #define STACK_SEG 0x8000␉␉␉// zef: old STACK_SEG 0x5000␊ |
52 | #define STACK_OFS 0xFFF0 // stack pointer␊ |
53 | ␊ |
54 | #define BOOT1U_SEG 0x1000␊ |
55 | #define BOOT1U_OFS 0x0200␊ |
56 | ␊ |
57 | #define BOOT2_SEG 0x2000␊ |
58 | #define BOOT2_OFS 0x0200 // 512 byte disk sector offset␊ |
59 | ␊ |
60 | #define BIOS_ADDR 0x8000 // BIOS disk I/O buffer␊ |
61 | #define BIOS_LEN 0x8000 // 32K - divisible by 512 and 2048␊ |
62 | ␊ |
63 | #define BOOT0_ADDR 0x7E00 // boot0 gets loaded here␊ |
64 | ␊ |
65 | ␊ |
66 | /* These are all "virtual" addresses...␊ |
67 | * which are physical addresses plus MEMBASE.␊ |
68 | */␊ |
69 | #define ADDR32(seg, ofs) (((seg) << 4 ) + (ofs))␊ |
70 | ␊ |
71 | #define MEMBASE 0x0␊ |
72 | ␊ |
73 | #define BOOTSTRUCT_ADDR 0x00011000 // it's slightly smaller␊ |
74 | #define BOOTSTRUCT_LEN 0x0000F000␊ |
75 | ␊ |
76 | #define BASE_ADDR ADDR32(BASE_SEG, 0)␊ |
77 | #define BOOT1U_ADDR ADDR32(BOOT1U_SEG, BOOT1U_OFS)␊ |
78 | #define BOOT2_ADDR ADDR32(BOOT2_SEG, BOOT2_OFS)␊ |
79 | // TODO: BOOT_ADDR ?␊ |
80 | ␊ |
81 | #define HIB_ADDR 0x00040000 // special hibernation area␊ |
82 | #define HIB_LEN 0x00060000␊ |
83 | ␊ |
84 | #define VIDEO_ADDR 0x000A0000 // unusable space␊ |
85 | #define VIDEO_LEN 0x00060000␊ |
86 | ␊ |
87 | #define KERNEL_ADDR 0x00100000 // 64M kernel + drivers␊ |
88 | #define KERNEL_LEN 0x04000000␊ |
89 | ␊ |
90 | #define ZALLOC_ADDR 0x04100000 // 256M zalloc area␊ |
91 | #define ZALLOC_LEN 0x10000000␊ |
92 | ␊ |
93 | #define LOAD_ADDR 0x14100000 // 95M File load buffer␊ |
94 | #define LOAD_LEN 0x05F80000␊ |
95 | ␊ |
96 | // Location of data fed to boot2 by the prebooter␊ |
97 | #define PREBOOT_DATA 0x1A080000 // Still have enough room for a 95M ramdisk image␊ |
98 | // in case of 512MB system memory.␊ |
99 | ␊ |
100 | #define TFTP_ADDR LOAD_ADDR // tftp download buffer␊ |
101 | #define TFTP_LEN LOAD_LEN␊ |
102 | ␊ |
103 | #define kLoadAddr LOAD_ADDR␊ |
104 | #define kLoadSize LOAD_LEN␊ |
105 | ␊ |
106 | #define CONVENTIONAL_LEN 0x0A0000 // 640k␊ |
107 | #define EXTENDED_ADDR 0x100000 // 1024k␊ |
108 | ␊ |
109 | #define ptov(paddr) ((paddr) - MEMBASE)␊ |
110 | #define vtop(vaddr) ((vaddr) + MEMBASE)␊ |
111 | ␊ |
112 | /*␊ |
113 | * Extract segment/offset from a linear address.␊ |
114 | */␊ |
115 | #define OFFSET16(addr) ((addr) - BASE_ADDR)␊ |
116 | #define OFFSET(addr) ((addr) & 0xFFFF)␊ |
117 | #define SEGMENT(addr) (((addr) & 0xF0000) >> 4)␊ |
118 | ␊ |
119 | /* Extract segment/offset in normalized form so that the resulting far pointer␊ |
120 | will point to something that is very unlikely to straddle a segment.␊ |
121 | This is sometimes known as a "huge" pointer.␊ |
122 | */␊ |
123 | #define NORMALIZED_OFFSET(addr) ((addr) & 0x000F)␊ |
124 | #define NORMALIZED_SEGMENT(addr) (((addr) & 0xFFFF0) >> 4)␊ |
125 | ␊ |
126 | /*␊ |
127 | * We need a minimum of 32MB of system memory.␊ |
128 | */␊ |
129 | #define MIN_SYS_MEM_KB (32 * 1024)␊ |
130 | ␊ |
131 | /*␊ |
132 | * The number of descriptor entries in the GDT.␊ |
133 | */␊ |
134 | #define NGDTENT 7␊ |
135 | ␊ |
136 | /*␊ |
137 | * The total size of the GDT in bytes.␊ |
138 | * Each descriptor entry require 8 bytes.␊ |
139 | */␊ |
140 | #define GDTLIMIT ( NGDTENT * 8 )␊ |
141 | ␊ |
142 | #endif /* !__BOOT_MEMORY_H */␊ |
143 | |