Root/qiboot/include/setup.h

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 linux/Documentation/arm/Setup
12 * for more info.
13 *
14 * NOTE:
15 * This file contains two ways to pass information from the boot
16 * loader to the kernel. The old struct param_struct is deprecated,
17 * but it will be kept in the kernel for 5 years from now
18 * (2001). This will allow boot loaders to convert to the new struct
19 * tag way.
20 */
21#ifndef __ASMARM_SETUP_H
22#define __ASMARM_SETUP_H
23
24/*
25 * Usage:
26 * - do not go blindly adding fields, add them at the end
27 * - when adding fields, don't rely on the address until
28 * a patch from me has been released
29 * - unused fields should be zero (for future expansion)
30 * - this structure is relatively short-lived - only
31 * guaranteed to contain useful data in setup_arch()
32 */
33#define COMMAND_LINE_SIZE 1024
34
35/* This is the old deprecated way to pass parameters to the kernel */
36struct param_struct {
37    union {
38    struct {
39        unsigned long page_size; /* 0 */
40        unsigned long nr_pages; /* 4 */
41        unsigned long ramdisk_size; /* 8 */
42        unsigned long flags; /* 12 */
43#define FLAG_READONLY 1
44#define FLAG_RDLOAD 4
45#define FLAG_RDPROMPT 8
46        unsigned long rootdev; /* 16 */
47        unsigned long video_num_cols; /* 20 */
48        unsigned long video_num_rows; /* 24 */
49        unsigned long video_x; /* 28 */
50        unsigned long video_y; /* 32 */
51        unsigned long memc_control_reg; /* 36 */
52        unsigned char sounddefault; /* 40 */
53        unsigned char adfsdrives; /* 41 */
54        unsigned char bytes_per_char_h; /* 42 */
55        unsigned char bytes_per_char_v; /* 43 */
56        unsigned long pages_in_bank[4]; /* 44 */
57        unsigned long pages_in_vram; /* 60 */
58        unsigned long initrd_start; /* 64 */
59        unsigned long initrd_size; /* 68 */
60        unsigned long rd_start; /* 72 */
61        unsigned long system_rev; /* 76 */
62        unsigned long system_serial_low; /* 80 */
63        unsigned long system_serial_high; /* 84 */
64        unsigned long mem_fclk_21285; /* 88 */
65    } s;
66    char unused[256];
67    } u1;
68    union {
69    char paths[8][128];
70    struct {
71        unsigned long magic;
72        char n[1024 - sizeof(unsigned long)];
73    } s;
74    } u2;
75    char commandline[COMMAND_LINE_SIZE];
76};
77
78
79/*
80 * The new way of passing information: a list of tagged entries
81 */
82
83/* The list ends with an ATAG_NONE node. */
84#define ATAG_NONE 0x00000000
85
86struct tag_header {
87    u32 size;
88    u32 tag;
89};
90
91/* The list must start with an ATAG_CORE node */
92#define ATAG_CORE 0x54410001
93
94struct tag_core {
95    u32 flags; /* bit 0 = read-only */
96    u32 pagesize;
97    u32 rootdev;
98};
99
100/* it is allowed to have multiple ATAG_MEM nodes */
101#define ATAG_MEM 0x54410002
102
103struct tag_mem32 {
104    u32 size;
105    u32 start; /* physical start address */
106};
107
108/* VGA text type displays */
109#define ATAG_VIDEOTEXT 0x54410003
110
111struct tag_videotext {
112    u8 x;
113    u8 y;
114    u16 video_page;
115    u8 video_mode;
116    u8 video_cols;
117    u16 video_ega_bx;
118    u8 video_lines;
119    u8 video_isvga;
120    u16 video_points;
121};
122
123/* describes how the ramdisk will be used in kernel */
124#define ATAG_RAMDISK 0x54410004
125
126struct tag_ramdisk {
127    u32 flags; /* bit 0 = load, bit 1 = prompt */
128    u32 size; /* decompressed ramdisk size in _kilo_ bytes */
129    u32 start; /* starting block of floppy-based RAM disk image */
130};
131
132/* describes where the compressed ramdisk image lives (virtual address) */
133/*
134 * this one accidentally used virtual addresses - as such,
135 * its depreciated.
136 */
137#define ATAG_INITRD 0x54410005
138
139/* describes where the compressed ramdisk image lives (physical address) */
140#define ATAG_INITRD2 0x54420005
141
142struct tag_initrd {
143    u32 start; /* physical start address */
144    u32 size; /* size of compressed ramdisk image in bytes */
145};
146
147/* board serial number. "64 bits should be enough for everybody" */
148#define ATAG_SERIAL 0x54410006
149
150struct tag_serialnr {
151    u32 low;
152    u32 high;
153};
154
155/* board revision */
156#define ATAG_REVISION 0x54410007
157
158struct tag_revision {
159    u32 rev;
160};
161
162/* initial values for vesafb-type framebuffers. see struct screen_info
163 * in include/linux/tty.h
164 */
165#define ATAG_VIDEOLFB 0x54410008
166
167struct tag_videolfb {
168    u16 lfb_width;
169    u16 lfb_height;
170    u16 lfb_depth;
171    u16 lfb_linelength;
172    u32 lfb_base;
173    u32 lfb_size;
174    u8 red_size;
175    u8 red_pos;
176    u8 green_size;
177    u8 green_pos;
178    u8 blue_size;
179    u8 blue_pos;
180    u8 rsvd_size;
181    u8 rsvd_pos;
182};
183
184/* command line: \0 terminated string */
185#define ATAG_CMDLINE 0x54410009
186
187struct tag_cmdline {
188    char cmdline[1]; /* this is the minimum size */
189};
190
191/* acorn RiscPC specific information */
192#define ATAG_ACORN 0x41000101
193
194struct tag_acorn {
195    u32 memc_control_reg;
196    u32 vram_pages;
197    u8 sounddefault;
198    u8 adfsdrives;
199};
200
201/* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
202#define ATAG_MEMCLK 0x41000402
203
204struct tag_memclk {
205    u32 fmemclk;
206};
207
208struct tag {
209    struct tag_header hdr;
210    union {
211        struct tag_core core;
212        struct tag_mem32 mem;
213        struct tag_videotext videotext;
214        struct tag_ramdisk ramdisk;
215        struct tag_initrd initrd;
216        struct tag_serialnr serialnr;
217        struct tag_revision revision;
218        struct tag_videolfb videolfb;
219        struct tag_cmdline cmdline;
220
221        /*
222         * Acorn specific
223         */
224        struct tag_acorn acorn;
225
226        /*
227         * DC21285 specific
228         */
229        struct tag_memclk memclk;
230    } u;
231};
232
233struct tagtable {
234    u32 tag;
235    int (*parse)(const struct tag *);
236};
237
238#define __tag __attribute__((unused, __section__(".taglist")))
239#define __tagtable(tag, fn) \
240static struct tagtable __tagtable_##fn __tag = { tag, fn }
241
242#define tag_member_present(tag,member) \
243    ((unsigned long)(&((struct tag *)0L)->member + 1) \
244        <= (tag)->hdr.size * 4)
245
246#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
247#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
248
249#define for_each_tag(t,base) \
250    for (t = base; t->hdr.size; t = tag_next(t))
251
252/*
253 * Memory map description
254 */
255#define NR_BANKS 8
256
257struct meminfo {
258    int nr_banks;
259    unsigned long end;
260    struct {
261        unsigned long start;
262        unsigned long size;
263        int node;
264    } bank[NR_BANKS];
265};
266
267extern struct meminfo meminfo;
268
269#endif
270

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