1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2003
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7#include <bootm.h>
8#include <bootstage.h>
9#include <command.h>
10#include <env.h>
11#include <image.h>
12#include <lmb.h>
13#include <log.h>
14#include <asm/global_data.h>
15#include <u-boot/zlib.h>
16#include <bzlib.h>
17#include <watchdog.h>
18#include <asm/byteorder.h>
19#ifdef CONFIG_SHOW_BOOT_PROGRESS
20# include <status_led.h>
21#endif
22
23DECLARE_GLOBAL_DATA_PTR;
24
25#define PHYSADDR(x) x
26
27#define LINUX_MAX_ENVS		256
28#define LINUX_MAX_ARGS		256
29
30static ulong get_sp (void);
31static void set_clocks_in_mhz (struct bd_info *kbd);
32
33void arch_lmb_reserve(struct lmb *lmb)
34{
35	arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 1024);
36}
37
38int do_bootm_linux(int flag, struct bootm_info *bmi)
39{
40	struct bootm_headers *images = bmi->images;
41	int ret;
42	struct bd_info  *kbd;
43	void  (*kernel) (struct bd_info *, ulong, ulong, ulong, ulong);
44	struct lmb *lmb = &images->lmb;
45
46	/*
47	 * allow the PREP bootm subcommand, it is required for bootm to work
48	 */
49	if (flag & BOOTM_STATE_OS_PREP)
50		return 0;
51
52	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
53		return 1;
54
55	/* allocate space for kernel copy of board info */
56	ret = boot_get_kbd (lmb, &kbd);
57	if (ret) {
58		puts("ERROR with allocation of kernel bd\n");
59		goto error;
60	}
61	set_clocks_in_mhz(kbd);
62
63	if (IS_ENABLED(CONFIG_LMB)) {
64		ret = image_setup_linux(images);
65		if (ret)
66			goto error;
67	}
68
69	kernel = (void (*)(struct bd_info *, ulong, ulong, ulong, ulong))images->ep;
70
71	debug("## Transferring control to Linux (at address %08lx) ...\n",
72	      (ulong) kernel);
73
74	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
75
76	/*
77	 * Linux Kernel Parameters (passing board info data):
78	 *   sp+00: Ignore, side effect of using jsr to jump to kernel
79	 *   sp+04: ptr to board info data
80	 *   sp+08: initrd_start or 0 if no initrd
81	 *   sp+12: initrd_end - unused if initrd_start is 0
82	 *   sp+16: Start of command line string
83	 *   sp+20: End   of command line string
84	 */
85	(*kernel)(kbd, images->initrd_start, images->initrd_end,
86		  images->cmdline_start, images->cmdline_end);
87	/* does not return */
88error:
89	return 1;
90}
91
92static ulong get_sp (void)
93{
94	ulong sp;
95
96	asm("movel %%a7, %%d0\n"
97	    "movel %%d0, %0\n": "=d"(sp): :"%d0");
98
99	return sp;
100}
101
102static void set_clocks_in_mhz (struct bd_info *kbd)
103{
104	char *s;
105
106	s = env_get("clocks_in_mhz");
107	if (s) {
108		/* convert all clock information to MHz */
109		kbd->bi_intfreq /= 1000000L;
110		kbd->bi_busfreq /= 1000000L;
111	}
112}
113