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#define COMMAND_LINE_SIZE 1024
18
19#ifdef __KERNEL__
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 */
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 */
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 __used __attribute__((__section__(".taglist")))
177#define __tagtable(tag, fn) \
178static struct tagtable __tagtable_##fn __tag = { tag, fn }
179
180#define tag_member_present(tag,member)				\
181	((unsigned long)(&((struct tag *)0L)->member + 1)	\
182		<= (tag)->hdr.size * 4)
183
184#define tag_next(t)	((struct tag *)((u32 *)(t) + (t)->hdr.size))
185#define tag_size(type)	((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
186
187#define for_each_tag(t,base)		\
188	for (t = base; t->hdr.size; t = tag_next(t))
189
190/*
191 * Memory map description
192 */
193#define NR_BANKS 8
194
195struct meminfo {
196	int nr_banks;
197	unsigned long end;
198	struct {
199		unsigned long start;
200		unsigned long size;
201		int           node;
202	} bank[NR_BANKS];
203};
204
205extern struct meminfo meminfo;
206
207#endif  /*  __KERNEL__  */
208
209#endif
210