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");
62 * allow the PREP bootm subcommand, it is required for bootm to work
64 if (flag & BOOTM_STATE_OS_PREP)
67 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
70 theKernel = (void (*)(int, int, uint))images->ep;
74 machid = simple_strtoul(s, NULL, 16);
75 printf("Using machid 0x%x from environment\n", machid);
78 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
80 debug("## Transferring control to Linux (at address %08lx) ...\n",
83 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
84 defined(CONFIG_CMDLINE_TAG) || \
85 defined(CONFIG_INITRD_TAG) || \
86 defined(CONFIG_SERIAL_TAG) || \
87 defined(CONFIG_REVISION_TAG)
89 #ifdef CONFIG_SERIAL_TAG
90 setup_serial_tag(¶ms);
92 #ifdef CONFIG_REVISION_TAG
93 setup_revision_tag(¶ms);
95 #ifdef CONFIG_SETUP_MEMORY_TAGS
96 setup_memory_tags(bd);
98 #ifdef CONFIG_CMDLINE_TAG
99 setup_commandline_tag(bd, commandline);
101 #ifdef CONFIG_INITRD_TAG
102 if (images->rd_start && images->rd_end)
103 setup_initrd_tag(bd, images->rd_start, images->rd_end);
108 /* we assume that the kernel is in place */
109 printf("\nStarting kernel ...\n\n");
111 #ifdef CONFIG_USB_DEVICE
113 extern void udc_disconnect(void);
118 cleanup_before_linux();
120 theKernel(0, machid, bd->bi_boot_params);
121 /* does not return */
127 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \
128 defined(CONFIG_CMDLINE_TAG) || \
129 defined(CONFIG_INITRD_TAG) || \
130 defined(CONFIG_SERIAL_TAG) || \
131 defined(CONFIG_REVISION_TAG)
132 static void setup_start_tag(bd_t *bd)
134 params = (struct tag *)bd->bi_boot_params;
136 params->hdr.tag = ATAG_CORE;
137 params->hdr.size = tag_size(tag_core);
139 params->u.core.flags = 0;
140 params->u.core.pagesize = 0;
141 params->u.core.rootdev = 0;
143 params = tag_next(params);
147 #ifdef CONFIG_SETUP_MEMORY_TAGS
148 static void setup_memory_tags(bd_t *bd)
152 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
153 params->hdr.tag = ATAG_MEM;
154 params->hdr.size = tag_size(tag_mem32);
156 params->u.mem.start = bd->bi_dram[i].start;
157 params->u.mem.size = bd->bi_dram[i].size;
159 params = tag_next(params);
162 #endif /* CONFIG_SETUP_MEMORY_TAGS */
165 static void setup_commandline_tag(bd_t *bd, char *commandline)
172 /* eat leading white space */
173 for (p = commandline; *p == ' '; p++)
176 /* skip non-existent command lines so the kernel will still
177 * use its default command line.
182 params->hdr.tag = ATAG_CMDLINE;
184 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
186 strcpy(params->u.cmdline.cmdline, p)
189 params = tag_next(params);
193 #ifdef CONFIG_INITRD_TAG
194 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
196 /* an ATAG_INITRD node tells the kernel where the compressed
197 * ramdisk can be found. ATAG_RDIMG is a better name, actually.
199 params->hdr.tag = ATAG_INITRD2;
200 params->hdr.size = tag_size(tag_initrd);
202 params->u.initrd.start = initrd_start;
203 params->u.initrd.size = initrd_end - initrd_start;
205 params = tag_next(params);
207 #endif /* CONFIG_INITRD_TAG */
209 #ifdef CONFIG_SERIAL_TAG
210 void setup_serial_tag(struct tag **tmp)
212 struct tag *params = *tmp;
213 struct tag_serialnr serialnr;
214 void get_board_serial(struct tag_serialnr *serialnr);
216 get_board_serial(&serialnr);
217 params->hdr.tag = ATAG_SERIAL;
218 params->hdr.size = tag_size(tag_serialnr);
219 params->u.serialnr.low = serialnr.low;
220 params->u.serialnr.high = serialnr.high;
221 params = tag_next(params);
226 #ifdef CONFIG_REVISION_TAG
227 void setup_revision_tag(struct tag **in_params)
230 u32 get_board_rev(void);
232 rev = get_board_rev();
233 params->hdr.tag = ATAG_REVISION;
234 params->hdr.size = tag_size(tag_revision);
235 params->u.revision.rev = rev;
236 params = tag_next(params);
238 #endif /* CONFIG_REVISION_TAG */
241 static void setup_end_tag(bd_t *bd)
243 params->hdr.tag = ATAG_NONE;
244 params->hdr.size = 0;
247 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */