Add more bits for native hammer boot support.
[dragonfly.git] / sys / boot / pc32 / bootasm.h
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1/*
2 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
4e06dda7 34 * $DragonFly: src/sys/boot/pc32/bootasm.h,v 1.4 2004/07/27 19:37:15 dillon Exp $
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35 */
36
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37/*
38 * Set the bootloader address set.
39 *
40 * UNSET - default backwards compatible boot blocks
41 * 1 - experimental move addresses above 0x1000 and hardwire the user
42 * stack.
43 * 2 - experimental move addresses abobe 0x2000 and hardwire the user
44 * stack.
04144d62 45 */
cacaceec 46/* #define BOOT_NEWBOOTLOADER 2 */
409cbc03 47
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48/*
49 * Various fixed constants that do not change
50 */
04144d62 51
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52#define BDA_MEM 0x413 /* Free memory */
53#define BDA_KEYFLAGS 0x417 /* Keyboard shift-state flags */
54#define BDA_SCR 0x449 /* Video mode */
55#define BDA_POS 0x450 /* Cursor position */
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56#define BDA_BOOT 0x472 /* Boot howto flag */
57#define BDA_NHRDRV 0x475
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58#define BDA_KEYBOARD 0x496 /* BDA byte with keyboard bit */
59
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60/*
61 * Structural equivalences
62 */
63#define BOOTINFO_SIZE 0x48 /* bootinfo structure size */
64#define MEM_ARG_SIZE 0x18
65#define MEM_PAGE_SIZE 0x1000
66#define MEM_BTX_LDR_OFF MEM_PAGE_SIZE /* offset of btx in the loader */
67#define USR_ARGOFFSET (BOOTINFO_SIZE+MEM_ARG_SIZE)
68
69/* -------- WARNING, BOOT0 STACK BELOW MEM_BIOS_LADDR -------- */
70#define MEM_BIOS_LADDR 0x7c00 /* Load address (static/BIOS) */
71
72/*
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73 * This is the origin of boot2.bin relative to the BTX user address space
74 * (e.g. physical address would be MEM_BTX_USR+BOOT2_VORIGIN).
75 */
6080181b 76#define BOOT2_VORIGIN 0x4000
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77
78/*
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79 * NOTE: BOOT0_ORIGIN is extracted from this file and used in boot0/Makefile
80 * BOOT1_ORIGIN is extracted from this file and used in boot2/Makefile
81 *
82 * NOTE: boot0 has a variable space after its sector which contains
83 * the fake partition and other variables. ~128 bytes should be reserved
84 * for this variable space, but it may overlap BOOT1's data space.
85 */
86
87#if !defined(BOOT_NEWBOOTLOADER)
88
89/************************************************************************
90 * STANDARD BOOTLOADER ADDRESS SET *
91 ************************************************************************
92 *
93 *
94 */
95
96#define USR_ARGSPACE 0x1000 /* BTX loader / ttl argspace reserved */
97
98#define BOOT0_ORIGIN 0x600 /* boot0 relocated to (512+128 bytes) */
99/* -------- WARNING, BOOT1 STACK BELOW BOOT1_ORIGIN ------- */
100#define BOOT1_ORIGIN 0x700 /* boot1 relocated to (512 bytes) */
101#define MEM_ARG 0x900 /* tmp arg store cdboot/pxeboot */
102
04144d62 103#define MEM_BTX_ESP 0x1000 /* btxldr top of stack? */
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104#define MEM_BTX_START 0x1000 /* start of BTX memory */
105#define MEM_BTX_ESP0 0x1800 /* Supervisor stack */
106#define MEM_BTX_BUF 0x1800 /* Scratch buffer stack */
107#define MEM_BTX_ESP1 0x1e00 /* Link stack */
108#define MEM_BTX_IDT 0x1e00 /* IDT */
109#define MEM_BTX_TSS 0x1f98 /* TSS */
110#define MEM_BTX_MAP 0x2000 /* I/O bit map */
111#define MEM_BTX_DIR 0x4000 /* Page directory */
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112
113/*
114 * NOTE: page table location is hardwired in /usr/src/usr.sbin/btxld/btx.h
115 */
409cbc03 116#define MEM_BTX_TBL 0x5000 /* Page tables */
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117#define MEM_BTX_ZEND 0x7000 /* Zero from IDT to here in btx.S */
118
119/******************** 0x7c00 BIOS LOAD ADDRESS (512 bytes) **********/
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120
121/*
122 * NOTE: BOOT2_LOAD_BUF also determines where the btx loader and boot2.bin
123 * code are loaded, since they are all in the boot2 file.
124 */
125#define BOOT2_LOAD_BUF 0x8c00 /* boot1 loads boot2 */
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126#define MEM_BTX_ORG 0x9000 /* base of BTX code */
127#define MEM_BTX_ENTRY 0x9010 /* BTX starts execution here */
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128/*
129 * WARNING! The USR area may be messed around with in 16 bit code mode,
130 * data loaded should probably not cross 0xffff (e.g. boot2 loads
131 * ~8K at MEM_BTX_USR).
132 *
133 * MEM_BTX_USR is basically the segment offset BTX uses when
134 * running 'client' code. So address 0 in the client code will
135 * actually be physical address MEM_BTX_USR.
136 */
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137#define MEM_BTX_USR 0xa000 /* base of BTX client/user memory */
138#define MEM_BTX_USR_ARG 0xa100
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139
140#elif defined(BOOT_NEWBOOTLOADER) && BOOT_NEWBOOTLOADER == 1
141
142/************************************************************************
143 * EXPERIMENTAL BOOTLOADER ADDRESS SET 1 *
144 ************************************************************************
145 *
146 *
147 */
148
149#define USR_ARGSPACE 0x1000 /* BTX loader / ttl argspace reserved */
150#define MEM_BTX_USR_STK 0x90000 /* (phys addr) btx client usr stack */
151
152#define MEM_BTX_START 0x1000 /* (unchanged) */
153#define MEM_BTX_ESP0 0x1800 /* (unchanged) */
154#define MEM_BTX_BUF 0x1800 /* (unchanged) */
155#define MEM_BTX_ESP1 0x1e00 /* (unchanged) */
156#define MEM_BTX_IDT 0x1e00 /* (unchanged) */
157#define MEM_BTX_TSS 0x1f98 /* (unchanged) */
158#define MEM_BTX_MAP 0x2000 /* (unchanged) */
159#define MEM_BTX_DIR 0x4000 /* (unchanged) */
160#define MEM_BTX_TBL 0x5000 /* (unchanged) */
161#define MEM_BTX_ZEND 0x7000 /* (unchanged) */
162
163#define MEM_BTX_ESP 0x7800 /* don't use 0x1000 */
164#define BOOT0_ORIGIN 0x7800 /* boot0 relocated */
165#define BOOT1_ORIGIN 0x7900 /* boot1 relocated (data only?) */
166#define MEM_ARG 0x7b00 /* cdboot/pxeboot disk/slice xfer */
167/******************** 0x7c00 BIOS LOAD ADDRESS (512 bytes) **********/
168
169#define BOOT2_LOAD_BUF 0x8c00 /* (unchanged) */
170#define MEM_BTX_ORG 0x9000 /* (unchanged) */
171#define MEM_BTX_ENTRY 0x9010 /* (unchanged) */
172
173#define MEM_BTX_USR 0xa000 /* (unchanged) */
174#define MEM_BTX_USR_ARG 0xa100 /* (unchanged) */
175
176
177#elif defined(BOOT_NEWBOOTLOADER) && BOOT_NEWBOOTLOADER == 2
178
179/************************************************************************
180 * EXPERIMENTAL BOOTLOADER ADDRESS SET 2 *
181 ************************************************************************
182 *
183 *
184 */
185#define USR_ARGSPACE 0x1000 /* BTX loader / ttl argspace reserved */
186#define MEM_BTX_USR_STK 0x90000 /* (phys addr) btx client usr stack */
187
188#define MEM_BTX_START 0x2000 /* (unchanged) */
189#define MEM_BTX_ESP0 0x2800 /* (unchanged) */
190#define MEM_BTX_BUF 0x2800 /* (unchanged) */
191#define MEM_BTX_ESP1 0x2e00 /* (unchanged) */
192#define MEM_BTX_IDT 0x2e00 /* (unchanged) */
193#define MEM_BTX_TSS 0x2f98 /* (unchanged) */
194#define MEM_BTX_MAP 0x3000 /* (unchanged) */
195#define MEM_BTX_DIR 0x5000 /* (unchanged) */
196/****** MEM_BTX_TBL (16K) SUPPORT REMOVED ***********************/
197#define MEM_BTX_ZEND 0x6000 /* (unchanged) */
198
199#define MEM_BTX_ESP 0x7800 /* don't use 0x1000 */
200#define BOOT0_ORIGIN 0x7800 /* boot0 relocated */
201#define BOOT1_ORIGIN 0x7900 /* boot1 relocated (data only?) */
202#define MEM_ARG 0x7b00 /* cdboot/pxeboot disk/slice xfer */
203/******************** 0x7c00 BIOS LOAD ADDRESS (512 bytes) **********/
204
205#define BOOT2_LOAD_BUF 0x8c00 /* (unchanged) */
206#define MEM_BTX_ORG 0x9000 /* (unchanged) */
207#define MEM_BTX_ENTRY 0x9010 /* (unchanged) */
208
209#define MEM_BTX_USR 0xa000 /* base of BTX client/user memory */
210#define MEM_BTX_USR_ARG 0xa100 /* boot1->boot2 disk/slice xfer */
211
212#else
213
214#error "BAD BOOT_NEWBOOTLOADER SETTING. UNSET TO GET DEFAULT"
215
216#endif /* BOOT_NEWBOOTLOADER */
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