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
|
/*
* linux/arch/arm26/kernel/compat.c
*
* Copyright (C) 2001 Russell King
* 2003 Ian Molton
*
* 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.
*
* We keep the old params compatibility cruft in one place (here)
* so we don't end up with lots of mess around other places.
*
* NOTE:
* The old struct param_struct is deprecated, but it will be kept in
* the kernel for 5 years from now (2001). This will allow boot loaders
* to convert to the new struct tag way.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/page.h>
//#include <asm/arch.h>
//#include <asm/mach/irq.h>
/*
* Usage:
* - do not go blindly adding fields, add them at the end
* - when adding fields, don't rely on the address until
* a patch from me has been released
* - unused fields should be zero (for future expansion)
* - this structure is relatively short-lived - only
* guaranteed to contain useful data in setup_arch()
*
* This is the old deprecated way to pass parameters to the kernel
*/
struct param_struct {
union {
struct {
unsigned long page_size; /* 0 */
unsigned long nr_pages; /* 4 */
unsigned long ramdisk_size; /* 8 */
unsigned long flags; /* 12 */
#define FLAG_READONLY 1
#define FLAG_RDLOAD 4
#define FLAG_RDPROMPT 8
unsigned long rootdev; /* 16 */
unsigned long video_num_cols; /* 20 */
unsigned long video_num_rows; /* 24 */
unsigned long video_x; /* 28 */
unsigned long video_y; /* 32 */
unsigned long memc_control_reg; /* 36 */
unsigned char sounddefault; /* 40 */
unsigned char adfsdrives; /* 41 */
unsigned char bytes_per_char_h; /* 42 */
unsigned char bytes_per_char_v; /* 43 */
unsigned long pages_in_bank[4]; /* 44 */
unsigned long pages_in_vram; /* 60 */
unsigned long initrd_start; /* 64 */
unsigned long initrd_size; /* 68 */
unsigned long rd_start; /* 72 */
unsigned long system_rev; /* 76 */
unsigned long system_serial_low; /* 80 */
unsigned long system_serial_high; /* 84 */
unsigned long mem_fclk_21285; /* 88 */
} s;
char unused[256];
} u1;
union {
char paths[8][128];
struct {
unsigned long magic;
char n[1024 - sizeof(unsigned long)];
} s;
} u2;
char commandline[COMMAND_LINE_SIZE];
};
static struct tag * __init memtag(struct tag *tag, unsigned long start, unsigned long size)
{
tag = tag_next(tag);
tag->hdr.tag = ATAG_MEM;
tag->hdr.size = tag_size(tag_mem32);
tag->u.mem.size = size;
tag->u.mem.start = start;
return tag;
}
static void __init build_tag_list(struct param_struct *params, void *taglist)
{
struct tag *tag = taglist;
if (params->u1.s.page_size != PAGE_SIZE) {
printk(KERN_WARNING "Warning: bad configuration page, "
"trying to continue\n");
return;
}
printk(KERN_DEBUG "Converting old-style param struct to taglist\n");
tag->hdr.tag = ATAG_CORE;
tag->hdr.size = tag_size(tag_core);
tag->u.core.flags = params->u1.s.flags & FLAG_READONLY;
tag->u.core.pagesize = params->u1.s.page_size;
tag->u.core.rootdev = params->u1.s.rootdev;
tag = tag_next(tag);
tag->hdr.tag = ATAG_RAMDISK;
tag->hdr.size = tag_size(tag_ramdisk);
tag->u.ramdisk.flags = (params->u1.s.flags & FLAG_RDLOAD ? 1 : 0) |
(params->u1.s.flags & FLAG_RDPROMPT ? 2 : 0);
tag->u.ramdisk.size = params->u1.s.ramdisk_size;
tag->u.ramdisk.start = params->u1.s.rd_start;
tag = tag_next(tag);
tag->hdr.tag = ATAG_INITRD;
tag->hdr.size = tag_size(tag_initrd);
tag->u.initrd.start = params->u1.s.initrd_start;
tag->u.initrd.size = params->u1.s.initrd_size;
tag = tag_next(tag);
tag->hdr.tag = ATAG_SERIAL;
tag->hdr.size = tag_size(tag_serialnr);
tag->u.serialnr.low = params->u1.s.system_serial_low;
tag->u.serialnr.high = params->u1.s.system_serial_high;
tag = tag_next(tag);
tag->hdr.tag = ATAG_REVISION;
tag->hdr.size = tag_size(tag_revision);
tag->u.revision.rev = params->u1.s.system_rev;
tag = memtag(tag, PHYS_OFFSET, params->u1.s.nr_pages * PAGE_SIZE);
tag = tag_next(tag);
tag->hdr.tag = ATAG_ACORN;
tag->hdr.size = tag_size(tag_acorn);
tag->u.acorn.memc_control_reg = params->u1.s.memc_control_reg;
tag->u.acorn.vram_pages = params->u1.s.pages_in_vram;
tag->u.acorn.sounddefault = params->u1.s.sounddefault;
tag->u.acorn.adfsdrives = params->u1.s.adfsdrives;
tag = tag_next(tag);
tag->hdr.tag = ATAG_CMDLINE;
tag->hdr.size = (strlen(params->commandline) + 3 +
sizeof(struct tag_header)) >> 2;
strcpy(tag->u.cmdline.cmdline, params->commandline);
tag = tag_next(tag);
tag->hdr.tag = ATAG_NONE;
tag->hdr.size = 0;
memmove(params, taglist, ((int)tag) - ((int)taglist) +
sizeof(struct tag_header));
}
void __init convert_to_tag_list(struct tag *tags)
{
struct param_struct *params = (struct param_struct *)tags;
build_tag_list(params, ¶ms->u2);
}
void __init squash_mem_tags(struct tag *tag)
{
for (; tag->hdr.size; tag = tag_next(tag))
if (tag->hdr.tag == ATAG_MEM)
tag->hdr.tag = ATAG_NONE;
}
|
