| 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 0x1000␉␉␉// 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 0x9000 // 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 // 128M kernel + drivers␊ |
| 88 | #define KERNEL_LEN 0x08000000␊ |
| 89 | ␊ |
| 90 | #define ZALLOC_ADDR 0x08100000 // 256M zalloc area␊ |
| 91 | #define ZALLOC_LEN 0x10000000␊ |
| 92 | ␊ |
| 93 | #define LOAD_ADDR 0x18100000 // 64M File load buffer␊ |
| 94 | #define LOAD_LEN 0x04000000␊ |
| 95 | ␊ |
| 96 | // Location of data fed to boot2 by the prebooter␊ |
| 97 | #define PREBOOT_DATA 0x1C100000 // Still have enough room for a 63M 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 | |
