projects/linux·blob v2.6.21 · refs

226 lines · 4.6 KiB

1/*
2 * linux/include/asm/setup.h
3 *
4 * Copyright (C) 1997-1999 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Structure passed to kernel to tell it about the
11 * hardware it's running on. See Documentation/arm/Setup
12 * for more info.
13 */
14#ifndef __ASMARM_SETUP_H
15#define __ASMARM_SETUP_H
16
17#include <asm/types.h>
18
19#define COMMAND_LINE_SIZE 1024
20
21/* The list ends with an ATAG_NONE node. */
22#define ATAG_NONE 0x00000000
23
24struct tag_header {
25 __u32 size;
26 __u32 tag;
27};
28
29/* The list must start with an ATAG_CORE node */
30#define ATAG_CORE 0x54410001
31
32struct tag_core {
33 __u32 flags; /* bit 0 = read-only */
34 __u32 pagesize;
35 __u32 rootdev;
36};
37
38/* it is allowed to have multiple ATAG_MEM nodes */
39#define ATAG_MEM 0x54410002
40
41struct tag_mem32 {
42 __u32 size;
43 __u32 start; /* physical start address */
44};
45
46/* VGA text type displays */
47#define ATAG_VIDEOTEXT 0x54410003
48
49struct tag_videotext {
50 __u8 x;
51 __u8 y;
52 __u16 video_page;
53 __u8 video_mode;
54 __u8 video_cols;
55 __u16 video_ega_bx;
56 __u8 video_lines;
57 __u8 video_isvga;
58 __u16 video_points;
59};
60
61/* describes how the ramdisk will be used in kernel */
62#define ATAG_RAMDISK 0x54410004
63
64struct tag_ramdisk {
65 __u32 flags; /* bit 0 = load, bit 1 = prompt */
66 __u32 size; /* decompressed ramdisk size in _kilo_ bytes */
67 __u32 start; /* starting block of floppy-based RAM disk image */
68};
69
70/* describes where the compressed ramdisk image lives (virtual address) */
71/*
72 * this one accidentally used virtual addresses - as such,
73 * it's deprecated.
74 */
75#define ATAG_INITRD 0x54410005
76
77/* describes where the compressed ramdisk image lives (physical address) */
78#define ATAG_INITRD2 0x54420005
79
80struct tag_initrd {
81 __u32 start; /* physical start address */
82 __u32 size; /* size of compressed ramdisk image in bytes */
83};
84
85/* board serial number. "64 bits should be enough for everybody" */
86#define ATAG_SERIAL 0x54410006
87
88struct tag_serialnr {
89 __u32 low;
90 __u32 high;
91};
92
93/* board revision */
94#define ATAG_REVISION 0x54410007
95
96struct tag_revision {
97 __u32 rev;
98};
99
100/* initial values for vesafb-type framebuffers. see struct screen_info
101 * in include/linux/tty.h
102 */
103#define ATAG_VIDEOLFB 0x54410008
104
105struct tag_videolfb {
106 __u16 lfb_width;
107 __u16 lfb_height;
108 __u16 lfb_depth;
109 __u16 lfb_linelength;
110 __u32 lfb_base;
111 __u32 lfb_size;
112 __u8 red_size;
113 __u8 red_pos;
114 __u8 green_size;
115 __u8 green_pos;
116 __u8 blue_size;
117 __u8 blue_pos;
118 __u8 rsvd_size;
119 __u8 rsvd_pos;
120};
121
122/* command line: \0 terminated string */
123#define ATAG_CMDLINE 0x54410009
124
125struct tag_cmdline {
126 char cmdline[1]; /* this is the minimum size */
127};
128
129/* acorn RiscPC specific information */
130#define ATAG_ACORN 0x41000101
131
132struct tag_acorn {
133 __u32 memc_control_reg;
134 __u32 vram_pages;
135 __u8 sounddefault;
136 __u8 adfsdrives;
137};
138
139/* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
140#define ATAG_MEMCLK 0x41000402
141
142struct tag_memclk {
143 __u32 fmemclk;
144};
145
146struct tag {
147 struct tag_header hdr;
148 union {
149 struct tag_core core;
150 struct tag_mem32 mem;
151 struct tag_videotext videotext;
152 struct tag_ramdisk ramdisk;
153 struct tag_initrd initrd;
154 struct tag_serialnr serialnr;
155 struct tag_revision revision;
156 struct tag_videolfb videolfb;
157 struct tag_cmdline cmdline;
158
159 /*
160 * Acorn specific
161 */
162 struct tag_acorn acorn;
163
164 /*
165 * DC21285 specific
166 */
167 struct tag_memclk memclk;
168 } u;
169};
170
171struct tagtable {
172 __u32 tag;
173 int (*parse)(const struct tag *);
174};
175
176#define tag_member_present(tag,member) \
177 ((unsigned long)(&((struct tag *)0L)->member + 1) \
178 <= (tag)->hdr.size * 4)
179
180#define tag_next(t) ((struct tag *)((__u32 *)(t) + (t)->hdr.size))
181#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
182
183#define for_each_tag(t,base) \
184 for (t = base; t->hdr.size; t = tag_next(t))
185
186#ifdef __KERNEL__
187
188#define __tag __attribute_used__ __attribute__((__section__(".taglist.init")))
189#define __tagtable(tag, fn) \
190static struct tagtable __tagtable_##fn __tag = { tag, fn }
191
192/*
193 * Memory map description
194 */
195#ifdef CONFIG_ARCH_LH7A40X
196# define NR_BANKS 16
197#else
198# define NR_BANKS 8
199#endif
200
201struct membank {
202 unsigned long start;
203 unsigned long size;
204 int node;
205};
206
207struct meminfo {
208 int nr_banks;
209 struct membank bank[NR_BANKS];
210};
211
212/*
213 * Early command line parameters.
214 */
215struct early_params {
216 const char *arg;
217 void (*fn)(char **p);
218};
219
220#define __early_param(name,fn) \
221static struct early_params __early_##fn __attribute_used__ \
222__attribute__((__section__(".early_param.init"))) = { name, fn }
223
224#endif /* __KERNEL__ */
225
226#endif