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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	#ifndef __BOOT_MEMORY_H
	26	#define __BOOT_MEMORY_H
	27
	28	/* Memory addresses used by booter and friends */
	29
	30	#define BASE_SEG 0x2000
	31	#define STACK_SEG 0x5000
	32	#define STACK_OFS 0xFFF0 // stack pointer
	33
	34	#define BOOT1U_SEG 0x1000
	35	#define BOOT1U_OFS 0x0200
	36
	37	#define BOOT2_SEG BASE_SEG
	38	#define BOOT2_OFS 0x0200 // 512 byte disk sector offset
	39
	40	#define BIOS_ADDR 0x8000 // BIOS disk I/O buffer
	41	#define BIOS_LEN 0x8000 // 32K - divisible by 512 and 2048
	42
	43	#define BOOT0_ADDR 0x7E00 // boot0 gets loaded here
	44
	45
	46	/* These are all "virtual" addresses...
	47	* which are physical addresses plus MEMBASE.
	48	*/
	49	#define ADDR32(seg, ofs) (((seg) << 4 ) + (ofs))
	50
	51	#define MEMBASE 0x0
	52
	53	#define BOOTSTRUCT_ADDR 0x00011000 // it's slightly smaller
	54	#define BOOTSTRUCT_LEN 0x0000F000
	55
	56	#define BASE_ADDR ADDR32(BASE_SEG, 0)
	57	#define BASE1U_ADDR ADDR32(BOOT1U_SEG, 0)
	58	#define BOOT1U_ADDR ADDR32(BOOT1U_SEG, BOOT1U_OFS)
	59	#define BOOT2_ADDR ADDR32(BOOT2_SEG, BOOT2_OFS)
	60
	61	#define HIB_ADDR 0x00040000 // special hibernation area
	62	#define HIB_LEN 0x00060000
	63
	64	#define VIDEO_ADDR 0x000A0000 // unusable space
	65	#define VIDEO_LEN 0x00060000
	66
	67	#define KERNEL_ADDR 0x00100000 // 64M kernel + drivers
	68	#define KERNEL_LEN 0x04000000
	69
	70	#define ZALLOC_ADDR 0x04100000 // 39M zalloc area
	71	#define ZALLOC_LEN 0x02700000
	72
	73	#define LOAD_ADDR 0x06800000 // 24M File load buffer
	74	#define LOAD_LEN 0x01800000
	75
	76	#define TFTP_ADDR LOAD_ADDR // tftp download buffer
	77	#define TFTP_LEN LOAD_LEN
	78
	79	#define kLoadAddr LOAD_ADDR
	80	#define kLoadSize LOAD_LEN
	81
	82	#define CONVENTIONAL_LEN 0x0A0000 // 640k
	83	#define EXTENDED_ADDR 0x100000 // 1024k
	84
	85	#define ptov(paddr) ((paddr) - MEMBASE)
	86	#define vtop(vaddr) ((vaddr) + MEMBASE)
	87
	88	/*
	89	* Extract segment/offset from a linear address.
	90	*/
	91	#define OFFSET16(addr) ((addr) - BASE_ADDR)
	92	#define OFFSET1U16(addr) ((addr) - BASE1U_ADDR)
	93	#define OFFSET(addr) ((addr) & 0xFFFF)
	94	#define SEGMENT(addr) (((addr) & 0xF0000) >> 4)
	95
	96	/*
	97	* We need a minimum of 32MB of system memory.
	98	*/
	99	#define MIN_SYS_MEM_KB (32 * 1024)
	100
	101	/*
	102	* The number of descriptor entries in the GDT.
	103	*/
	104	#define NGDTENT 7
	105
	106	/*
	107	* The total size of the GDT in bytes.
	108	* Each descriptor entry require 8 bytes.
	109	*/
	110	#define GDTLIMIT ( NGDTENT * 8 )
	111
	112	#endif /* !__BOOT_MEMORY_H */