2 * linux/arch/nds32/include/asm/setup.h
4 * Copyright (C) 1997-1999 Russell King
5 * Copyright (C) 2008 Andes Technology Corporation
6 * Copyright (C) 2013 Ken Kuo (ken_kuo@andestech.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * Structure passed to kernel to tell it about the
13 * hardware it's running on. See Documentation/arm/Setup
16 #ifndef __ASMNDS32_SETUP_H
17 #define __ASMNDS32_SETUP_H
19 #define COMMAND_LINE_SIZE 256
21 /* The list ends with an ATAG_NONE node. */
22 #define ATAG_NONE 0x00000000
29 /* The list must start with an ATAG_CORE node */
30 #define ATAG_CORE 0x54410001
33 u32 flags; /* bit 0 = read-only */
38 /* it is allowed to have multiple ATAG_MEM nodes */
39 #define ATAG_MEM 0x54410002
43 u32 start; /* physical start address */
46 /* VGA text type displays */
47 #define ATAG_VIDEOTEXT 0x54410003
49 struct tag_videotext {
61 /* describes how the ramdisk will be used in kernel */
62 #define ATAG_RAMDISK 0x54410004
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 */
71 * this one accidentally used virtual addresses - as such,
73 * describes where the compressed ramdisk image lives (virtual address)
75 #define ATAG_INITRD 0x54410005
77 /* describes where the compressed ramdisk image lives (physical address) */
78 #define ATAG_INITRD2 0x54420005
81 u32 start; /* physical start address */
82 u32 size; /* size of compressed ramdisk image in bytes */
85 /* board serial number. "64 bits should be enough for everybody" */
86 #define ATAG_SERIAL 0x54410006
94 #define ATAG_REVISION 0x54410007
100 /* initial values for vesafb-type framebuffers. see struct screen_info
101 * in include/linux/tty.h
103 #define ATAG_VIDEOLFB 0x54410008
105 struct tag_videolfb {
122 /* command line: \0 terminated string */
123 #define ATAG_CMDLINE 0x54410009
126 char cmdline[COMMAND_LINE_SIZE];
130 struct tag_header hdr;
132 struct tag_core core;
133 struct tag_mem32 mem;
134 struct tag_videotext videotext;
135 struct tag_ramdisk ramdisk;
136 struct tag_initrd initrd;
137 struct tag_serialnr serialnr;
138 struct tag_revision revision;
139 struct tag_videolfb videolfb;
140 struct tag_cmdline cmdline;
146 int (*parse)(const struct tag *);
149 #define tag_member_present(tag, member) \
150 ((unsigned long)(&((struct tag *)0L)->member + 1) \
151 <= (tag)->hdr.size * 4)
153 #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
154 #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
156 #define for_each_tag(t, base) \
157 for (t = base; t->hdr.size; t = tag_next(t))
161 #define __tag __used __attribute__((__section__(".taglist")))
162 #define __tagtable(tag, fn) \
163 static struct tagtable __tagtable_##fn __tag = { tag, fn }
166 * Memory map description
180 * Early command line parameters.
182 struct early_params {
184 void (*fn)(char **p);
187 #define __early_param(name, fn) \
188 static struct early_params __early_##fn __used \
189 __attribute__((__section__("__early_param"))) = { name, fn }