1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2ea0364f1SPeter Tyser /*
3ea0364f1SPeter Tyser * (C) Copyright 2003
4ea0364f1SPeter Tyser * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5ea0364f1SPeter Tyser */
6ea0364f1SPeter Tyser
7ea0364f1SPeter Tyser #include <common.h>
8ea0364f1SPeter Tyser #include <command.h>
9ea0364f1SPeter Tyser #include <image.h>
10ea0364f1SPeter Tyser #include <u-boot/zlib.h>
11ea0364f1SPeter Tyser #include <bzlib.h>
12ea0364f1SPeter Tyser #include <watchdog.h>
13ea0364f1SPeter Tyser #include <environment.h>
14ea0364f1SPeter Tyser #include <asm/byteorder.h>
15ea0364f1SPeter Tyser #ifdef CONFIG_SHOW_BOOT_PROGRESS
16ea0364f1SPeter Tyser # include <status_led.h>
17ea0364f1SPeter Tyser #endif
18ea0364f1SPeter Tyser
19ea0364f1SPeter Tyser DECLARE_GLOBAL_DATA_PTR;
20ea0364f1SPeter Tyser
21ea0364f1SPeter Tyser #define PHYSADDR(x) x
22ea0364f1SPeter Tyser
23ea0364f1SPeter Tyser #define LINUX_MAX_ENVS 256
24ea0364f1SPeter Tyser #define LINUX_MAX_ARGS 256
25ea0364f1SPeter Tyser
26ea0364f1SPeter Tyser static ulong get_sp (void);
27ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd);
28ea0364f1SPeter Tyser
arch_lmb_reserve(struct lmb * lmb)29ea0364f1SPeter Tyser void arch_lmb_reserve(struct lmb *lmb)
30ea0364f1SPeter Tyser {
31ea0364f1SPeter Tyser ulong sp;
32ea0364f1SPeter Tyser
33ea0364f1SPeter Tyser /*
34ea0364f1SPeter Tyser * Booting a (Linux) kernel image
35ea0364f1SPeter Tyser *
36ea0364f1SPeter Tyser * Allocate space for command line and board info - the
37ea0364f1SPeter Tyser * address should be as high as possible within the reach of
38ea0364f1SPeter Tyser * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
39ea0364f1SPeter Tyser * memory, which means far enough below the current stack
40ea0364f1SPeter Tyser * pointer.
41ea0364f1SPeter Tyser */
42ea0364f1SPeter Tyser sp = get_sp();
43ea0364f1SPeter Tyser debug ("## Current stack ends at 0x%08lx ", sp);
44ea0364f1SPeter Tyser
45ea0364f1SPeter Tyser /* adjust sp by 1K to be safe */
46ea0364f1SPeter Tyser sp -= 1024;
47ea0364f1SPeter Tyser lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
48ea0364f1SPeter Tyser }
49ea0364f1SPeter Tyser
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)5054841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
51ea0364f1SPeter Tyser {
52ea0364f1SPeter Tyser int ret;
53ea0364f1SPeter Tyser bd_t *kbd;
54ea0364f1SPeter Tyser void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
55ea0364f1SPeter Tyser struct lmb *lmb = &images->lmb;
56ea0364f1SPeter Tyser
572cb0e55aSAndreas Bießmann /*
582cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work
592cb0e55aSAndreas Bießmann */
602cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP)
612cb0e55aSAndreas Bießmann return 0;
622cb0e55aSAndreas Bießmann
63ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
64ea0364f1SPeter Tyser return 1;
65ea0364f1SPeter Tyser
66ea0364f1SPeter Tyser /* allocate space for kernel copy of board info */
67590d3cacSGrant Likely ret = boot_get_kbd (lmb, &kbd);
68ea0364f1SPeter Tyser if (ret) {
69ea0364f1SPeter Tyser puts("ERROR with allocation of kernel bd\n");
70ea0364f1SPeter Tyser goto error;
71ea0364f1SPeter Tyser }
72ea0364f1SPeter Tyser set_clocks_in_mhz(kbd);
73ea0364f1SPeter Tyser
7424507cf5SSimon Glass ret = image_setup_linux(images);
75ea0364f1SPeter Tyser if (ret)
76ea0364f1SPeter Tyser goto error;
77ea0364f1SPeter Tyser
7824507cf5SSimon Glass kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep;
7924507cf5SSimon Glass
80ea0364f1SPeter Tyser debug("## Transferring control to Linux (at address %08lx) ...\n",
81ea0364f1SPeter Tyser (ulong) kernel);
82ea0364f1SPeter Tyser
83770605e4SSimon Glass bootstage_mark(BOOTSTAGE_ID_RUN_OS);
84ea0364f1SPeter Tyser
85ea0364f1SPeter Tyser /*
86ea0364f1SPeter Tyser * Linux Kernel Parameters (passing board info data):
87ea0364f1SPeter Tyser * sp+00: Ignore, side effect of using jsr to jump to kernel
88ea0364f1SPeter Tyser * sp+04: ptr to board info data
89ea0364f1SPeter Tyser * sp+08: initrd_start or 0 if no initrd
90ea0364f1SPeter Tyser * sp+12: initrd_end - unused if initrd_start is 0
91ea0364f1SPeter Tyser * sp+16: Start of command line string
92ea0364f1SPeter Tyser * sp+20: End of command line string
93ea0364f1SPeter Tyser */
94ddc94378SSimon Glass (*kernel)(kbd, images->initrd_start, images->initrd_end,
95ddc94378SSimon Glass images->cmdline_start, images->cmdline_end);
96ea0364f1SPeter Tyser /* does not return */
97ea0364f1SPeter Tyser error:
98ea0364f1SPeter Tyser return 1;
99ea0364f1SPeter Tyser }
100ea0364f1SPeter Tyser
get_sp(void)101ea0364f1SPeter Tyser static ulong get_sp (void)
102ea0364f1SPeter Tyser {
103ea0364f1SPeter Tyser ulong sp;
104ea0364f1SPeter Tyser
105ea0364f1SPeter Tyser asm("movel %%a7, %%d0\n"
106ea0364f1SPeter Tyser "movel %%d0, %0\n": "=d"(sp): :"%d0");
107ea0364f1SPeter Tyser
108ea0364f1SPeter Tyser return sp;
109ea0364f1SPeter Tyser }
110ea0364f1SPeter Tyser
set_clocks_in_mhz(bd_t * kbd)111ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd)
112ea0364f1SPeter Tyser {
113ea0364f1SPeter Tyser char *s;
114ea0364f1SPeter Tyser
11500caae6dSSimon Glass s = env_get("clocks_in_mhz");
11600caae6dSSimon Glass if (s) {
117ea0364f1SPeter Tyser /* convert all clock information to MHz */
118ea0364f1SPeter Tyser kbd->bi_intfreq /= 1000000L;
119ea0364f1SPeter Tyser kbd->bi_busfreq /= 1000000L;
120ea0364f1SPeter Tyser }
121ea0364f1SPeter Tyser }
122