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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 | 31 | #include <asm/byteorder.h> |
b6b0fe64 MB |
32 | #ifdef CONFIG_SHOW_BOOT_PROGRESS |
33 | # include <status_led.h> | |
34 | #endif | |
4e5ca3eb | 35 | |
d87080b7 WD |
36 | DECLARE_GLOBAL_DATA_PTR; |
37 | ||
4e5ca3eb WD |
38 | #define PHYSADDR(x) x |
39 | ||
bf9e3b38 WD |
40 | #define LINUX_MAX_ENVS 256 |
41 | #define LINUX_MAX_ARGS 256 | |
4e5ca3eb | 42 | |
ceaed2b1 | 43 | static ulong get_sp (void); |
b6b0fe64 | 44 | static void set_clocks_in_mhz (bd_t *kbd); |
ceaed2b1 | 45 | |
40d7e99d | 46 | int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) |
4e5ca3eb | 47 | { |
e822d7fc | 48 | ulong sp; |
f13e7b2e | 49 | |
c4f9419c | 50 | ulong rd_len; |
f13e7b2e | 51 | ulong initrd_start, initrd_end; |
274cea2b | 52 | int ret; |
f13e7b2e MB |
53 | |
54 | ulong cmd_start, cmd_end; | |
d3f2fa0d | 55 | ulong bootmap_base; |
d5934ad7 | 56 | bd_t *kbd; |
d5934ad7 | 57 | void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); |
e906cfae | 58 | struct lmb *lmb = &images->lmb; |
4e5ca3eb | 59 | |
d3f2fa0d KG |
60 | bootmap_base = getenv_bootm_low(); |
61 | ||
8ae158cd TL |
62 | /* |
63 | * Booting a (Linux) kernel image | |
64 | * | |
65 | * Allocate space for command line and board info - the | |
66 | * address should be as high as possible within the reach of | |
67 | * the kernel (see CFG_BOOTMAPSZ settings), but in unused | |
68 | * memory, which means far enough below the current stack | |
69 | * pointer. | |
70 | */ | |
b6b0fe64 MB |
71 | sp = get_sp(); |
72 | debug ("## Current stack ends at 0x%08lx ", sp); | |
8ae158cd | 73 | |
e822d7fc KG |
74 | /* adjust sp by 1K to be safe */ |
75 | sp -= 1024; | |
76 | lmb_reserve(lmb, sp, (CFG_SDRAM_BASE + gd->ram_size - sp)); | |
8ae158cd | 77 | |
b6b0fe64 | 78 | /* allocate space and init command line */ |
9a4daad0 | 79 | ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base); |
e822d7fc KG |
80 | if (ret) { |
81 | puts("ERROR with allocation of cmdline\n"); | |
82 | goto error; | |
83 | } | |
8ae158cd | 84 | |
b6b0fe64 | 85 | /* allocate space for kernel copy of board info */ |
9a4daad0 | 86 | ret = boot_get_kbd (lmb, &kbd, bootmap_base); |
e822d7fc KG |
87 | if (ret) { |
88 | puts("ERROR with allocation of kernel bd\n"); | |
89 | goto error; | |
90 | } | |
b6b0fe64 | 91 | set_clocks_in_mhz(kbd); |
8ae158cd | 92 | |
c160a954 | 93 | kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; |
4e5ca3eb | 94 | |
c4f9419c KG |
95 | rd_len = images->rd_end - images->rd_start; |
96 | ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, | |
9a4daad0 | 97 | &initrd_start, &initrd_end); |
e822d7fc KG |
98 | if (ret) |
99 | goto error; | |
4e5ca3eb | 100 | |
8ae158cd TL |
101 | debug("## Transferring control to Linux (at address %08lx) ...\n", |
102 | (ulong) kernel); | |
4e5ca3eb | 103 | |
b6b0fe64 | 104 | show_boot_progress (15); |
4e5ca3eb | 105 | |
8ae158cd TL |
106 | /* |
107 | * Linux Kernel Parameters (passing board info data): | |
108 | * r3: ptr to board info data | |
109 | * r4: initrd_start or 0 if no initrd | |
110 | * r5: initrd_end - unused if r4 is 0 | |
111 | * r6: Start of command line string | |
112 | * r7: End of command line string | |
113 | */ | |
114 | (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); | |
115 | /* does not return */ | |
274cea2b | 116 | error: |
40d7e99d | 117 | return 1; |
4e5ca3eb | 118 | } |
ceaed2b1 MB |
119 | |
120 | static ulong get_sp (void) | |
121 | { | |
122 | ulong sp; | |
123 | ||
124 | asm("movel %%a7, %%d0\n" | |
125 | "movel %%d0, %0\n": "=d"(sp): :"%d0"); | |
126 | ||
127 | return sp; | |
128 | } | |
b6b0fe64 MB |
129 | |
130 | static void set_clocks_in_mhz (bd_t *kbd) | |
131 | { | |
132 | char *s; | |
133 | ||
134 | if ((s = getenv("clocks_in_mhz")) != NULL) { | |
135 | /* convert all clock information to MHz */ | |
136 | kbd->bi_intfreq /= 1000000L; | |
137 | kbd->bi_busfreq /= 1000000L; | |
138 | } | |
139 | } |