]>
git.ipfire.org Git - people/ms/u-boot.git/blob - arch/nds32/lib/bootm.c
2 * Copyright (C) 2011 Andes Technology Corporation
3 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
4 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <u-boot/zlib.h>
26 #include <asm/byteorder.h>
28 DECLARE_GLOBAL_DATA_PTR
;
30 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
31 defined(CONFIG_CMDLINE_TAG) || \
32 defined(CONFIG_INITRD_TAG) || \
33 defined(CONFIG_SERIAL_TAG) || \
34 defined(CONFIG_REVISION_TAG)
35 static void setup_start_tag(bd_t
*bd
);
37 # ifdef CONFIG_SETUP_MEMORY_TAGS
38 static void setup_memory_tags(bd_t
*bd
);
40 static void setup_commandline_tag(bd_t
*bd
, char *commandline
);
42 # ifdef CONFIG_INITRD_TAG
43 static void setup_initrd_tag(bd_t
*bd
, ulong initrd_start
, ulong initrd_end
);
45 static void setup_end_tag(bd_t
*bd
);
47 static struct tag
*params
;
48 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
50 int do_bootm_linux(int flag
, int argc
, char *argv
[], bootm_headers_t
*images
)
54 int machid
= bd
->bi_arch_number
;
55 void (*theKernel
)(int zero
, int arch
, uint params
);
57 #ifdef CONFIG_CMDLINE_TAG
58 char *commandline
= getenv("bootargs");
61 if ((flag
!= 0) && (flag
!= BOOTM_STATE_OS_GO
))
64 theKernel
= (void (*)(int, int, uint
))images
->ep
;
68 machid
= simple_strtoul(s
, NULL
, 16);
69 printf("Using machid 0x%x from environment\n", machid
);
72 bootstage_mark(BOOTSTAGE_ID_RUN_OS
);
74 debug("## Transferring control to Linux (at address %08lx) ...\n",
77 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
78 defined(CONFIG_CMDLINE_TAG) || \
79 defined(CONFIG_INITRD_TAG) || \
80 defined(CONFIG_SERIAL_TAG) || \
81 defined(CONFIG_REVISION_TAG)
83 #ifdef CONFIG_SERIAL_TAG
84 setup_serial_tag(¶ms
);
86 #ifdef CONFIG_REVISION_TAG
87 setup_revision_tag(¶ms
);
89 #ifdef CONFIG_SETUP_MEMORY_TAGS
90 setup_memory_tags(bd
);
92 #ifdef CONFIG_CMDLINE_TAG
93 setup_commandline_tag(bd
, commandline
);
95 #ifdef CONFIG_INITRD_TAG
96 if (images
->rd_start
&& images
->rd_end
)
97 setup_initrd_tag(bd
, images
->rd_start
, images
->rd_end
);
102 /* we assume that the kernel is in place */
103 printf("\nStarting kernel ...\n\n");
105 #ifdef CONFIG_USB_DEVICE
107 extern void udc_disconnect(void);
112 cleanup_before_linux();
114 theKernel(0, machid
, bd
->bi_boot_params
);
115 /* does not return */
121 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
122 defined(CONFIG_CMDLINE_TAG) || \
123 defined(CONFIG_INITRD_TAG) || \
124 defined(CONFIG_SERIAL_TAG) || \
125 defined(CONFIG_REVISION_TAG)
126 static void setup_start_tag(bd_t
*bd
)
128 params
= (struct tag
*)bd
->bi_boot_params
;
130 params
->hdr
.tag
= ATAG_CORE
;
131 params
->hdr
.size
= tag_size(tag_core
);
133 params
->u
.core
.flags
= 0;
134 params
->u
.core
.pagesize
= 0;
135 params
->u
.core
.rootdev
= 0;
137 params
= tag_next(params
);
141 #ifdef CONFIG_SETUP_MEMORY_TAGS
142 static void setup_memory_tags(bd_t
*bd
)
146 for (i
= 0; i
< CONFIG_NR_DRAM_BANKS
; i
++) {
147 params
->hdr
.tag
= ATAG_MEM
;
148 params
->hdr
.size
= tag_size(tag_mem32
);
150 params
->u
.mem
.start
= bd
->bi_dram
[i
].start
;
151 params
->u
.mem
.size
= bd
->bi_dram
[i
].size
;
153 params
= tag_next(params
);
156 #endif /* CONFIG_SETUP_MEMORY_TAGS */
159 static void setup_commandline_tag(bd_t
*bd
, char *commandline
)
166 /* eat leading white space */
167 for (p
= commandline
; *p
== ' '; p
++)
170 /* skip non-existent command lines so the kernel will still
171 * use its default command line.
176 params
->hdr
.tag
= ATAG_CMDLINE
;
178 (sizeof(struct tag_header
) + strlen(p
) + 1 + 4) >> 2;
180 strcpy(params
->u
.cmdline
.cmdline
, p
)
183 params
= tag_next(params
);
187 #ifdef CONFIG_INITRD_TAG
188 static void setup_initrd_tag(bd_t
*bd
, ulong initrd_start
, ulong initrd_end
)
190 /* an ATAG_INITRD node tells the kernel where the compressed
191 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
193 params
->hdr
.tag
= ATAG_INITRD2
;
194 params
->hdr
.size
= tag_size(tag_initrd
);
196 params
->u
.initrd
.start
= initrd_start
;
197 params
->u
.initrd
.size
= initrd_end
- initrd_start
;
199 params
= tag_next(params
);
201 #endif /* CONFIG_INITRD_TAG */
203 #ifdef CONFIG_SERIAL_TAG
204 void setup_serial_tag(struct tag
**tmp
)
206 struct tag
*params
= *tmp
;
207 struct tag_serialnr serialnr
;
208 void get_board_serial(struct tag_serialnr
*serialnr
);
210 get_board_serial(&serialnr
);
211 params
->hdr
.tag
= ATAG_SERIAL
;
212 params
->hdr
.size
= tag_size(tag_serialnr
);
213 params
->u
.serialnr
.low
= serialnr
.low
;
214 params
->u
.serialnr
.high
= serialnr
.high
;
215 params
= tag_next(params
);
220 #ifdef CONFIG_REVISION_TAG
221 void setup_revision_tag(struct tag
**in_params
)
224 u32
get_board_rev(void);
226 rev
= get_board_rev();
227 params
->hdr
.tag
= ATAG_REVISION
;
228 params
->hdr
.size
= tag_size(tag_revision
);
229 params
->u
.revision
.rev
= rev
;
230 params
= tag_next(params
);
232 #endif /* CONFIG_REVISION_TAG */
235 static void setup_end_tag(bd_t
*bd
)
237 params
->hdr
.tag
= ATAG_NONE
;
238 params
->hdr
.size
= 0;
241 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */