summaryrefslogtreecommitdiffstats
path: root/arch/arm/include/asm/setup.h
blob: f2cd18a0932b786d0283d371ab9172f91db40fe1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
 *  linux/include/asm/setup.h
 *
 *  Copyright (C) 1997-1999 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Structure passed to kernel to tell it about the
 *  hardware it's running on.  See Documentation/arm/Setup
 *  for more info.
 */
#ifndef __ASMARM_SETUP_H
#define __ASMARM_SETUP_H

#include <asm/types.h>

#define COMMAND_LINE_SIZE 1024

/* The list ends with an ATAG_NONE node. */
#define ATAG_NONE	0x00000000

struct tag_header {
	__u32 size;
	__u32 tag;
};

/* The list must start with an ATAG_CORE node */
#define ATAG_CORE	0x54410001

struct tag_core {
	__u32 flags;		/* bit 0 = read-only */
	__u32 pagesize;
	__u32 rootdev;
};

/* it is allowed to have multiple ATAG_MEM nodes */
#define ATAG_MEM	0x54410002

struct tag_mem32 {
	__u32	size;
	__u32	start;	/* physical start address */
};

/* VGA text type displays */
#define ATAG_VIDEOTEXT	0x54410003

struct tag_videotext {
	__u8		x;
	__u8		y;
	__u16		video_page;
	__u8		video_mode;
	__u8		video_cols;
	__u16		video_ega_bx;
	__u8		video_lines;
	__u8		video_isvga;
	__u16		video_points;
};

/* describes how the ramdisk will be used in kernel */
#define ATAG_RAMDISK	0x54410004

struct tag_ramdisk {
	__u32 flags;	/* bit 0 = load, bit 1 = prompt */
	__u32 size;	/* decompressed ramdisk size in _kilo_ bytes */
	__u32 start;	/* starting block of floppy-based RAM disk image */
};

/* describes where the compressed ramdisk image lives (virtual address) */
/*
 * this one accidentally used virtual addresses - as such,
 * it's deprecated.
 */
#define ATAG_INITRD	0x54410005

/* describes where the compressed ramdisk image lives (physical address) */
#define ATAG_INITRD2	0x54420005

struct tag_initrd {
	__u32 start;	/* physical start address */
	__u32 size;	/* size of compressed ramdisk image in bytes */
};

/* board serial number. "64 bits should be enough for everybody" */
#define ATAG_SERIAL	0x54410006

struct tag_serialnr {
	__u32 low;
	__u32 high;
};

/* board revision */
#define ATAG_REVISION	0x54410007

struct tag_revision {
	__u32 rev;
};

/* initial values for vesafb-type framebuffers. see struct screen_info
 * in include/linux/tty.h
 */
#define ATAG_VIDEOLFB	0x54410008

struct tag_videolfb {
	__u16		lfb_width;
	__u16		lfb_height;
	__u16		lfb_depth;
	__u16		lfb_linelength;
	__u32		lfb_base;
	__u32		lfb_size;
	__u8		red_size;
	__u8		red_pos;
	__u8		green_size;
	__u8		green_pos;
	__u8		blue_size;
	__u8		blue_pos;
	__u8		rsvd_size;
	__u8		rsvd_pos;
};

/* command line: \0 terminated string */
#define ATAG_CMDLINE	0x54410009

struct tag_cmdline {
	char	cmdline[1];	/* this is the minimum size */
};

/* acorn RiscPC specific information */
#define ATAG_ACORN	0x41000101

struct tag_acorn {
	__u32 memc_control_reg;
	__u32 vram_pages;
	__u8 sounddefault;
	__u8 adfsdrives;
};

/* footbridge memory clock, see arch/arm/mach-footbridge/arch.c */
#define ATAG_MEMCLK	0x41000402

struct tag_memclk {
	__u32 fmemclk;
};

struct tag {
	struct tag_header hdr;
	union {
		struct tag_core		core;
		struct tag_mem32	mem;
		struct tag_videotext	videotext;
		struct tag_ramdisk	ramdisk;
		struct tag_initrd	initrd;
		struct tag_serialnr	serialnr;
		struct tag_revision	revision;
		struct tag_videolfb	videolfb;
		struct tag_cmdline	cmdline;

		/*
		 * Acorn specific
		 */
		struct tag_acorn	acorn;

		/*
		 * DC21285 specific
		 */
		struct tag_memclk	memclk;
	} u;
};

struct tagtable {
	__u32 tag;
	int (*parse)(const struct tag *);
};

#define tag_member_present(tag,member)				\
	((unsigned long)(&((struct tag *)0L)->member + 1)	\
		<= (tag)->hdr.size * 4)

#define tag_next(t)	((struct tag *)((__u32 *)(t) + (t)->hdr.size))
#define tag_size(type)	((sizeof(struct tag_header) + sizeof(struct type)) >> 2)

#define for_each_tag(t,base)		\
	for (t = base; t->hdr.size; t = tag_next(t))

#ifdef __KERNEL__

#define __tag __used __attribute__((__section__(".taglist.init")))
#define __tagtable(tag, fn) \
static struct tagtable __tagtable_##fn __tag = { tag, fn }

/*
 * Memory map description
 */
#ifdef CONFIG_ARCH_LH7A40X
# define NR_BANKS 16
#else
# define NR_BANKS 8
#endif

struct membank {
	unsigned long start;
	unsigned long size;
	int           node;
};

struct meminfo {
	int nr_banks;
	struct membank bank[NR_BANKS];
};

extern struct meminfo meminfo;

#define for_each_nodebank(iter,mi,no)			\
	for (iter = 0; iter < (mi)->nr_banks; iter++)	\
		if ((mi)->bank[iter].node == no)

#define bank_pfn_start(bank)	__phys_to_pfn((bank)->start)
#define bank_pfn_end(bank)	__phys_to_pfn((bank)->start + (bank)->size)
#define bank_pfn_size(bank)	((bank)->size >> PAGE_SHIFT)
#define bank_phys_start(bank)	(bank)->start
#define bank_phys_end(bank)	((bank)->start + (bank)->size)
#define bank_phys_size(bank)	(bank)->size

/*
 * Early command line parameters.
 */
struct early_params {
	const char *arg;
	void (*fn)(char **p);
};

#define __early_param(name,fn)					\
static struct early_params __early_##fn __used			\
__attribute__((__section__(".early_param.init"))) = { name, fn }

#endif  /*  __KERNEL__  */

#endif