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463d47f6 ML |
1 | /* |
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> | |
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 as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <common.h> | |
23 | #include <command.h> | |
24 | #include <image.h> | |
25 | #include <u-boot/zlib.h> | |
26 | #include <asm/byteorder.h> | |
27 | ||
28 | DECLARE_GLOBAL_DATA_PTR; | |
29 | ||
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); | |
36 | ||
37 | # ifdef CONFIG_SETUP_MEMORY_TAGS | |
38 | static void setup_memory_tags(bd_t *bd); | |
39 | # endif | |
40 | static void setup_commandline_tag(bd_t *bd, char *commandline); | |
41 | ||
42 | # ifdef CONFIG_INITRD_TAG | |
43 | static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); | |
44 | # endif | |
45 | static void setup_end_tag(bd_t *bd); | |
46 | ||
47 | static struct tag *params; | |
48 | #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ | |
49 | ||
50 | int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) | |
51 | { | |
52 | bd_t *bd = gd->bd; | |
53 | char *s; | |
54 | int machid = bd->bi_arch_number; | |
55 | void (*theKernel)(int zero, int arch, uint params); | |
56 | ||
57 | #ifdef CONFIG_CMDLINE_TAG | |
58 | char *commandline = getenv("bootargs"); | |
59 | #endif | |
60 | ||
61 | if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) | |
62 | return 1; | |
63 | ||
64 | theKernel = (void (*)(int, int, uint))images->ep; | |
65 | ||
66 | s = getenv("machid"); | |
67 | if (s) { | |
68 | machid = simple_strtoul(s, NULL, 16); | |
69 | printf("Using machid 0x%x from environment\n", machid); | |
70 | } | |
71 | ||
770605e4 | 72 | bootstage_mark(BOOTSTAGE_ID_RUN_OS); |
463d47f6 ML |
73 | |
74 | debug("## Transferring control to Linux (at address %08lx) ...\n", | |
75 | (ulong)theKernel); | |
76 | ||
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) | |
82 | setup_start_tag(bd); | |
83 | #ifdef CONFIG_SERIAL_TAG | |
84 | setup_serial_tag(¶ms); | |
85 | #endif | |
86 | #ifdef CONFIG_REVISION_TAG | |
87 | setup_revision_tag(¶ms); | |
88 | #endif | |
89 | #ifdef CONFIG_SETUP_MEMORY_TAGS | |
90 | setup_memory_tags(bd); | |
91 | #endif | |
92 | #ifdef CONFIG_CMDLINE_TAG | |
93 | setup_commandline_tag(bd, commandline); | |
94 | #endif | |
95 | #ifdef CONFIG_INITRD_TAG | |
96 | if (images->rd_start && images->rd_end) | |
97 | setup_initrd_tag(bd, images->rd_start, images->rd_end); | |
98 | #endif | |
99 | setup_end_tag(bd); | |
100 | #endif | |
101 | ||
102 | /* we assume that the kernel is in place */ | |
103 | printf("\nStarting kernel ...\n\n"); | |
104 | ||
105 | #ifdef CONFIG_USB_DEVICE | |
106 | { | |
107 | extern void udc_disconnect(void); | |
108 | udc_disconnect(); | |
109 | } | |
110 | #endif | |
111 | ||
112 | cleanup_before_linux(); | |
113 | ||
114 | theKernel(0, machid, bd->bi_boot_params); | |
115 | /* does not return */ | |
116 | ||
117 | return 1; | |
118 | } | |
119 | ||
120 | ||
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) | |
127 | { | |
128 | params = (struct tag *)bd->bi_boot_params; | |
129 | ||
130 | params->hdr.tag = ATAG_CORE; | |
131 | params->hdr.size = tag_size(tag_core); | |
132 | ||
133 | params->u.core.flags = 0; | |
134 | params->u.core.pagesize = 0; | |
135 | params->u.core.rootdev = 0; | |
136 | ||
137 | params = tag_next(params); | |
138 | } | |
139 | ||
140 | ||
141 | #ifdef CONFIG_SETUP_MEMORY_TAGS | |
142 | static void setup_memory_tags(bd_t *bd) | |
143 | { | |
144 | int i; | |
145 | ||
146 | for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { | |
147 | params->hdr.tag = ATAG_MEM; | |
148 | params->hdr.size = tag_size(tag_mem32); | |
149 | ||
150 | params->u.mem.start = bd->bi_dram[i].start; | |
151 | params->u.mem.size = bd->bi_dram[i].size; | |
152 | ||
153 | params = tag_next(params); | |
154 | } | |
155 | } | |
156 | #endif /* CONFIG_SETUP_MEMORY_TAGS */ | |
157 | ||
158 | ||
159 | static void setup_commandline_tag(bd_t *bd, char *commandline) | |
160 | { | |
161 | char *p; | |
162 | ||
163 | if (!commandline) | |
164 | return; | |
165 | ||
166 | /* eat leading white space */ | |
167 | for (p = commandline; *p == ' '; p++) | |
168 | ; | |
169 | ||
170 | /* skip non-existent command lines so the kernel will still | |
171 | * use its default command line. | |
172 | */ | |
173 | if (*p == '\0') | |
174 | return; | |
175 | ||
176 | params->hdr.tag = ATAG_CMDLINE; | |
177 | params->hdr.size = | |
178 | (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2; | |
179 | ||
180 | strcpy(params->u.cmdline.cmdline, p) | |
181 | ; | |
182 | ||
183 | params = tag_next(params); | |
184 | } | |
185 | ||
186 | ||
187 | #ifdef CONFIG_INITRD_TAG | |
188 | static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) | |
189 | { | |
190 | /* an ATAG_INITRD node tells the kernel where the compressed | |
191 | * ramdisk can be found. ATAG_RDIMG is a better name, actually. | |
192 | */ | |
193 | params->hdr.tag = ATAG_INITRD2; | |
194 | params->hdr.size = tag_size(tag_initrd); | |
195 | ||
196 | params->u.initrd.start = initrd_start; | |
197 | params->u.initrd.size = initrd_end - initrd_start; | |
198 | ||
199 | params = tag_next(params); | |
200 | } | |
201 | #endif /* CONFIG_INITRD_TAG */ | |
202 | ||
203 | #ifdef CONFIG_SERIAL_TAG | |
204 | void setup_serial_tag(struct tag **tmp) | |
205 | { | |
206 | struct tag *params = *tmp; | |
207 | struct tag_serialnr serialnr; | |
208 | void get_board_serial(struct tag_serialnr *serialnr); | |
209 | ||
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); | |
216 | *tmp = params; | |
217 | } | |
218 | #endif | |
219 | ||
220 | #ifdef CONFIG_REVISION_TAG | |
221 | void setup_revision_tag(struct tag **in_params) | |
222 | { | |
223 | u32 rev = 0; | |
224 | u32 get_board_rev(void); | |
225 | ||
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); | |
231 | } | |
232 | #endif /* CONFIG_REVISION_TAG */ | |
233 | ||
234 | ||
235 | static void setup_end_tag(bd_t *bd) | |
236 | { | |
237 | params->hdr.tag = ATAG_NONE; | |
238 | params->hdr.size = 0; | |
239 | } | |
240 | ||
241 | #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ |