]>
Commit | Line | Data |
---|---|---|
4e5ca3eb WD |
1 | /* |
2 | * (C) Copyright 2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
4e5ca3eb WD |
6 | */ |
7 | ||
8 | #include <common.h> | |
9 | #include <command.h> | |
4e5ca3eb | 10 | #include <image.h> |
a31e091a | 11 | #include <u-boot/zlib.h> |
8ae158cd | 12 | #include <bzlib.h> |
688e8eb4 | 13 | #include <watchdog.h> |
8ae158cd | 14 | #include <environment.h> |
4e5ca3eb | 15 | #include <asm/byteorder.h> |
b6b0fe64 MB |
16 | #ifdef CONFIG_SHOW_BOOT_PROGRESS |
17 | # include <status_led.h> | |
18 | #endif | |
4e5ca3eb | 19 | |
d87080b7 WD |
20 | DECLARE_GLOBAL_DATA_PTR; |
21 | ||
4e5ca3eb WD |
22 | #define PHYSADDR(x) x |
23 | ||
bf9e3b38 WD |
24 | #define LINUX_MAX_ENVS 256 |
25 | #define LINUX_MAX_ARGS 256 | |
4e5ca3eb | 26 | |
ceaed2b1 | 27 | static ulong get_sp (void); |
b6b0fe64 | 28 | static void set_clocks_in_mhz (bd_t *kbd); |
ceaed2b1 | 29 | |
76da19df | 30 | void arch_lmb_reserve(struct lmb *lmb) |
4e5ca3eb | 31 | { |
e822d7fc | 32 | ulong sp; |
f13e7b2e | 33 | |
8ae158cd TL |
34 | /* |
35 | * Booting a (Linux) kernel image | |
36 | * | |
37 | * Allocate space for command line and board info - the | |
38 | * address should be as high as possible within the reach of | |
6d0f6bcf | 39 | * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused |
8ae158cd TL |
40 | * memory, which means far enough below the current stack |
41 | * pointer. | |
42 | */ | |
b6b0fe64 MB |
43 | sp = get_sp(); |
44 | debug ("## Current stack ends at 0x%08lx ", sp); | |
8ae158cd | 45 | |
e822d7fc KG |
46 | /* adjust sp by 1K to be safe */ |
47 | sp -= 1024; | |
6d0f6bcf | 48 | lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); |
76da19df KG |
49 | } |
50 | ||
54841ab5 | 51 | int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) |
76da19df | 52 | { |
76da19df | 53 | int ret; |
76da19df KG |
54 | bd_t *kbd; |
55 | void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); | |
56 | struct lmb *lmb = &images->lmb; | |
57 | ||
2cb0e55a AB |
58 | /* |
59 | * allow the PREP bootm subcommand, it is required for bootm to work | |
60 | */ | |
61 | if (flag & BOOTM_STATE_OS_PREP) | |
62 | return 0; | |
63 | ||
49c3a861 KG |
64 | if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) |
65 | return 1; | |
66 | ||
b6b0fe64 | 67 | /* allocate space for kernel copy of board info */ |
590d3cac | 68 | ret = boot_get_kbd (lmb, &kbd); |
e822d7fc KG |
69 | if (ret) { |
70 | puts("ERROR with allocation of kernel bd\n"); | |
71 | goto error; | |
72 | } | |
b6b0fe64 | 73 | set_clocks_in_mhz(kbd); |
8ae158cd | 74 | |
24507cf5 | 75 | ret = image_setup_linux(images); |
e822d7fc KG |
76 | if (ret) |
77 | goto error; | |
4e5ca3eb | 78 | |
24507cf5 SG |
79 | kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; |
80 | ||
8ae158cd TL |
81 | debug("## Transferring control to Linux (at address %08lx) ...\n", |
82 | (ulong) kernel); | |
4e5ca3eb | 83 | |
770605e4 | 84 | bootstage_mark(BOOTSTAGE_ID_RUN_OS); |
4e5ca3eb | 85 | |
8ae158cd TL |
86 | /* |
87 | * Linux Kernel Parameters (passing board info data): | |
edff7bcc RR |
88 | * sp+00: Ignore, side effect of using jsr to jump to kernel |
89 | * sp+04: ptr to board info data | |
90 | * sp+08: initrd_start or 0 if no initrd | |
91 | * sp+12: initrd_end - unused if initrd_start is 0 | |
92 | * sp+16: Start of command line string | |
93 | * sp+20: End of command line string | |
8ae158cd | 94 | */ |
ddc94378 SG |
95 | (*kernel)(kbd, images->initrd_start, images->initrd_end, |
96 | images->cmdline_start, images->cmdline_end); | |
8ae158cd | 97 | /* does not return */ |
274cea2b | 98 | error: |
40d7e99d | 99 | return 1; |
4e5ca3eb | 100 | } |
ceaed2b1 MB |
101 | |
102 | static ulong get_sp (void) | |
103 | { | |
104 | ulong sp; | |
105 | ||
106 | asm("movel %%a7, %%d0\n" | |
107 | "movel %%d0, %0\n": "=d"(sp): :"%d0"); | |
108 | ||
109 | return sp; | |
110 | } | |
b6b0fe64 MB |
111 | |
112 | static void set_clocks_in_mhz (bd_t *kbd) | |
113 | { | |
114 | char *s; | |
115 | ||
116 | if ((s = getenv("clocks_in_mhz")) != NULL) { | |
117 | /* convert all clock information to MHz */ | |
118 | kbd->bi_intfreq /= 1000000L; | |
119 | kbd->bi_busfreq /= 1000000L; | |
120 | } | |
121 | } |