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4e5ca3eb WD |
1 | /* |
2 | * (C) Copyright 2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
bf9e3b38 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
4e5ca3eb WD |
16 | * GNU General Public License for more details. |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
bf9e3b38 | 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
4e5ca3eb WD |
21 | * |
22 | */ | |
23 | ||
24 | #include <common.h> | |
25 | #include <command.h> | |
4e5ca3eb WD |
26 | #include <image.h> |
27 | #include <zlib.h> | |
8ae158cd | 28 | #include <bzlib.h> |
688e8eb4 | 29 | #include <watchdog.h> |
8ae158cd | 30 | #include <environment.h> |
4e5ca3eb WD |
31 | #include <asm/byteorder.h> |
32 | ||
d87080b7 WD |
33 | DECLARE_GLOBAL_DATA_PTR; |
34 | ||
4e5ca3eb WD |
35 | #define PHYSADDR(x) x |
36 | ||
bf9e3b38 WD |
37 | #define LINUX_MAX_ENVS 256 |
38 | #define LINUX_MAX_ARGS 256 | |
4e5ca3eb | 39 | |
8ae158cd TL |
40 | #ifdef CONFIG_SHOW_BOOT_PROGRESS |
41 | # include <status_led.h> | |
42 | # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) | |
43 | #else | |
44 | # define SHOW_BOOT_PROGRESS(arg) | |
45 | #endif | |
4e5ca3eb | 46 | |
b97a2a0a MB |
47 | int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); |
48 | ||
8ae158cd TL |
49 | void do_bootm_linux(cmd_tbl_t * cmdtp, int flag, |
50 | int argc, char *argv[], | |
f13e7b2e | 51 | image_header_t *hdr, int verify) |
4e5ca3eb | 52 | { |
8ae158cd | 53 | ulong sp; |
f13e7b2e MB |
54 | |
55 | ulong rd_data, rd_len; | |
8ae158cd | 56 | ulong initrd_high; |
f13e7b2e MB |
57 | ulong initrd_start, initrd_end; |
58 | image_header_t *rd_hdr; | |
8ae158cd | 59 | int initrd_copy_to_ram = 1; |
f13e7b2e MB |
60 | |
61 | ulong cmd_start, cmd_end; | |
8ae158cd TL |
62 | char *cmdline; |
63 | char *s; | |
64 | bd_t *kbd; | |
65 | void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); | |
4e5ca3eb | 66 | |
8ae158cd TL |
67 | if ((s = getenv("initrd_high")) != NULL) { |
68 | /* a value of "no" or a similar string will act like 0, | |
69 | * turning the "load high" feature off. This is intentional. | |
70 | */ | |
71 | initrd_high = simple_strtoul(s, NULL, 16); | |
72 | if (initrd_high == ~0) | |
73 | initrd_copy_to_ram = 0; | |
74 | } else { /* not set, no restrictions to load high */ | |
75 | initrd_high = ~0; | |
76 | } | |
77 | ||
78 | #ifdef CONFIG_LOGBUFFER | |
79 | kbd = gd->bd; | |
80 | /* Prevent initrd from overwriting logbuffer */ | |
81 | if (initrd_high < (kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD)) | |
82 | initrd_high = kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD; | |
83 | debug("## Logbuffer at 0x%08lX ", kbd->bi_memsize - LOGBUFF_LEN); | |
84 | #endif | |
85 | ||
86 | /* | |
87 | * Booting a (Linux) kernel image | |
88 | * | |
89 | * Allocate space for command line and board info - the | |
90 | * address should be as high as possible within the reach of | |
91 | * the kernel (see CFG_BOOTMAPSZ settings), but in unused | |
92 | * memory, which means far enough below the current stack | |
93 | * pointer. | |
94 | */ | |
95 | asm("movel %%a7, %%d0\n" | |
96 | "movel %%d0, %0\n": "=d"(sp): :"%d0"); | |
8280f6a1 SR |
97 | |
98 | debug("## Current stack ends at 0x%08lX ", sp); | |
8ae158cd TL |
99 | |
100 | sp -= 2048; /* just to be sure */ | |
101 | if (sp > CFG_BOOTMAPSZ) | |
102 | sp = CFG_BOOTMAPSZ; | |
103 | sp &= ~0xF; | |
104 | ||
105 | debug("=> set upper limit to 0x%08lX\n", sp); | |
106 | ||
107 | cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF); | |
108 | kbd = (bd_t *) (((ulong) cmdline - sizeof(bd_t)) & ~0xF); | |
109 | ||
110 | if ((s = getenv("bootargs")) == NULL) | |
111 | s = ""; | |
112 | ||
113 | strcpy(cmdline, s); | |
114 | ||
115 | cmd_start = (ulong) & cmdline[0]; | |
116 | cmd_end = cmd_start + strlen(cmdline); | |
117 | ||
118 | *kbd = *(gd->bd); | |
119 | ||
120 | #ifdef DEBUG | |
121 | printf("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start, cmd_end); | |
122 | ||
123 | do_bdinfo(NULL, 0, 0, NULL); | |
124 | #endif | |
125 | ||
126 | if ((s = getenv("clocks_in_mhz")) != NULL) { | |
127 | /* convert all clock information to MHz */ | |
128 | kbd->bi_intfreq /= 1000000L; | |
129 | kbd->bi_busfreq /= 1000000L; | |
130 | } | |
131 | ||
132 | kernel = | |
b97a2a0a | 133 | (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr); |
4e5ca3eb WD |
134 | |
135 | /* | |
136 | * Check if there is an initrd image | |
137 | */ | |
8ae158cd | 138 | |
4e5ca3eb | 139 | if (argc >= 3) { |
8ae158cd TL |
140 | debug("Not skipping initrd\n"); |
141 | SHOW_BOOT_PROGRESS(9); | |
4e5ca3eb | 142 | |
f13e7b2e MB |
143 | rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16); |
144 | printf ("## Loading RAMDisk Image at %08lx ...\n", rd_hdr); | |
4e5ca3eb | 145 | |
f13e7b2e | 146 | if (!image_check_magic (rd_hdr)) { |
8ae158cd TL |
147 | puts("Bad Magic Number\n"); |
148 | SHOW_BOOT_PROGRESS(-10); | |
149 | do_reset(cmdtp, flag, argc, argv); | |
4e5ca3eb WD |
150 | } |
151 | ||
f13e7b2e | 152 | if (!image_check_hcrc (rd_hdr)) { |
8ae158cd TL |
153 | puts("Bad Header Checksum\n"); |
154 | SHOW_BOOT_PROGRESS(-11); | |
155 | do_reset(cmdtp, flag, argc, argv); | |
4e5ca3eb WD |
156 | } |
157 | ||
8ae158cd | 158 | SHOW_BOOT_PROGRESS(10); |
4e5ca3eb | 159 | |
f13e7b2e | 160 | print_image_hdr (rd_hdr); |
4e5ca3eb | 161 | |
f13e7b2e MB |
162 | rd_data = image_get_data (rd_hdr); |
163 | rd_len = image_get_data_size (rd_hdr); | |
4e5ca3eb WD |
164 | |
165 | if (verify) { | |
8ae158cd | 166 | puts(" Verifying Checksum ... "); |
f13e7b2e | 167 | if (!image_check_dcrc_wd (rd_hdr, CHUNKSZ)) { |
8ae158cd TL |
168 | puts("Bad Data CRC\n"); |
169 | SHOW_BOOT_PROGRESS(-12); | |
170 | do_reset(cmdtp, flag, argc, argv); | |
171 | } | |
172 | puts("OK\n"); | |
4e5ca3eb WD |
173 | } |
174 | ||
8ae158cd | 175 | SHOW_BOOT_PROGRESS(11); |
4e5ca3eb | 176 | |
f13e7b2e MB |
177 | if (!image_check_os (rd_hdr, IH_OS_LINUX) || |
178 | !image_check_arch (rd_hdr, IH_ARCH_M68K) || | |
179 | !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) { | |
8ae158cd TL |
180 | puts("No Linux ColdFire Ramdisk Image\n"); |
181 | SHOW_BOOT_PROGRESS(-13); | |
182 | do_reset(cmdtp, flag, argc, argv); | |
4e5ca3eb WD |
183 | } |
184 | ||
185 | /* | |
186 | * Now check if we have a multifile image | |
187 | */ | |
f13e7b2e MB |
188 | } else if (image_check_type (hdr, IH_TYPE_MULTI)) { |
189 | /* | |
190 | * Get second entry data start address and len | |
191 | */ | |
192 | SHOW_BOOT_PROGRESS (13); | |
193 | image_multi_getimg (hdr, 1, &rd_data, &rd_len); | |
4e5ca3eb WD |
194 | } else { |
195 | /* | |
196 | * no initrd image | |
197 | */ | |
8ae158cd | 198 | SHOW_BOOT_PROGRESS(14); |
4e5ca3eb | 199 | |
f13e7b2e | 200 | rd_len = rd_data = 0; |
4e5ca3eb WD |
201 | } |
202 | ||
f13e7b2e | 203 | if (!rd_data) { |
8ae158cd | 204 | debug("No initrd\n"); |
4e5ca3eb | 205 | } |
4e5ca3eb | 206 | |
f13e7b2e | 207 | if (rd_data) { |
8ae158cd | 208 | if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */ |
f13e7b2e MB |
209 | initrd_start = rd_data; |
210 | initrd_end = initrd_start + rd_len; | |
8ae158cd | 211 | } else { |
f13e7b2e | 212 | initrd_start = (ulong) kbd - rd_len; |
8ae158cd TL |
213 | initrd_start &= ~(4096 - 1); /* align on page */ |
214 | ||
215 | if (initrd_high) { | |
216 | ulong nsp; | |
217 | ||
218 | /* | |
219 | * the inital ramdisk does not need to be within | |
220 | * CFG_BOOTMAPSZ as it is not accessed until after | |
221 | * the mm system is initialised. | |
222 | * | |
223 | * do the stack bottom calculation again and see if | |
224 | * the initrd will fit just below the monitor stack | |
225 | * bottom without overwriting the area allocated | |
226 | * above for command line args and board info. | |
227 | */ | |
228 | asm("movel %%a7, %%d0\n" | |
229 | "movel %%d0, %0\n": "=d"(nsp): :"%d0"); | |
8280f6a1 SR |
230 | |
231 | nsp -= 2048; /* just to be sure */ | |
8ae158cd TL |
232 | nsp &= ~0xF; |
233 | ||
234 | if (nsp > initrd_high) /* limit as specified */ | |
235 | nsp = initrd_high; | |
236 | ||
f13e7b2e | 237 | nsp -= rd_len; |
8ae158cd TL |
238 | nsp &= ~(4096 - 1); /* align on page */ |
239 | ||
240 | if (nsp >= sp) | |
241 | initrd_start = nsp; | |
4e5ca3eb | 242 | } |
4e5ca3eb | 243 | |
8ae158cd TL |
244 | SHOW_BOOT_PROGRESS(12); |
245 | ||
246 | debug | |
247 | ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n", | |
f13e7b2e | 248 | rd_data, rd_data + rd_len - 1, rd_len, rd_len); |
8ae158cd | 249 | |
f13e7b2e | 250 | initrd_end = initrd_start + rd_len; |
8ae158cd TL |
251 | printf(" Loading Ramdisk to %08lx, end %08lx ... ", |
252 | initrd_start, initrd_end); | |
af13cdbc MB |
253 | |
254 | memmove_wd((void *)initrd_start, | |
f13e7b2e | 255 | (void *)rd_data, rd_len, CHUNKSZ); |
af13cdbc | 256 | |
8ae158cd | 257 | puts("OK\n"); |
4e5ca3eb | 258 | } |
8ae158cd TL |
259 | } else { |
260 | initrd_start = 0; | |
261 | initrd_end = 0; | |
4e5ca3eb WD |
262 | } |
263 | ||
8ae158cd TL |
264 | debug("## Transferring control to Linux (at address %08lx) ...\n", |
265 | (ulong) kernel); | |
4e5ca3eb | 266 | |
8ae158cd | 267 | SHOW_BOOT_PROGRESS(15); |
4e5ca3eb | 268 | |
8ae158cd TL |
269 | /* |
270 | * Linux Kernel Parameters (passing board info data): | |
271 | * r3: ptr to board info data | |
272 | * r4: initrd_start or 0 if no initrd | |
273 | * r5: initrd_end - unused if r4 is 0 | |
274 | * r6: Start of command line string | |
275 | * r7: End of command line string | |
276 | */ | |
277 | (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); | |
278 | /* does not return */ | |
4e5ca3eb | 279 | } |