xref: /openbmc/u-boot/cmd/bootz.c (revision 7d301a59)
1 /*
2  * (C) Copyright 2000-2009
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #include <common.h>
9 #include <bootm.h>
10 #include <command.h>
11 #include <lmb.h>
12 #include <linux/compiler.h>
13 
14 int __weak bootz_setup(ulong image, ulong *start, ulong *end)
15 {
16 	/* Please define bootz_setup() for your platform */
17 
18 	puts("Your platform's zImage format isn't supported yet!\n");
19 	return -1;
20 }
21 
22 /*
23  * zImage booting support
24  */
25 static int bootz_start(cmd_tbl_t *cmdtp, int flag, int argc,
26 			char * const argv[], bootm_headers_t *images)
27 {
28 	int ret;
29 	ulong zi_start, zi_end;
30 
31 	ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
32 			      images, 1);
33 
34 	/* Setup Linux kernel zImage entry point */
35 	if (!argc) {
36 		images->ep = load_addr;
37 		debug("*  kernel: default image load address = 0x%08lx\n",
38 				load_addr);
39 	} else {
40 		images->ep = simple_strtoul(argv[0], NULL, 16);
41 		debug("*  kernel: cmdline image address = 0x%08lx\n",
42 			images->ep);
43 	}
44 
45 	ret = bootz_setup(images->ep, &zi_start, &zi_end);
46 	if (ret != 0)
47 		return 1;
48 
49 	lmb_reserve(&images->lmb, images->ep, zi_end - zi_start);
50 
51 	/*
52 	 * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
53 	 * have a header that provide this informaiton.
54 	 */
55 	if (bootm_find_images(flag, argc, argv))
56 		return 1;
57 
58 	return 0;
59 }
60 
61 int do_bootz(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
62 {
63 	int ret;
64 
65 	/* Consume 'bootz' */
66 	argc--; argv++;
67 
68 	if (bootz_start(cmdtp, flag, argc, argv, &images))
69 		return 1;
70 
71 	/*
72 	 * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
73 	 * disable interrupts ourselves
74 	 */
75 	bootm_disable_interrupts();
76 
77 	images.os.os = IH_OS_LINUX;
78 	ret = do_bootm_states(cmdtp, flag, argc, argv,
79 			      BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
80 			      BOOTM_STATE_OS_GO,
81 			      &images, 1);
82 
83 	return ret;
84 }
85 
86 #ifdef CONFIG_SYS_LONGHELP
87 static char bootz_help_text[] =
88 	"[addr [initrd[:size]] [fdt]]\n"
89 	"    - boot Linux zImage stored in memory\n"
90 	"\tThe argument 'initrd' is optional and specifies the address\n"
91 	"\tof the initrd in memory. The optional argument ':size' allows\n"
92 	"\tspecifying the size of RAW initrd.\n"
93 #if defined(CONFIG_OF_LIBFDT)
94 	"\tWhen booting a Linux kernel which requires a flat device-tree\n"
95 	"\ta third argument is required which is the address of the\n"
96 	"\tdevice-tree blob. To boot that kernel without an initrd image,\n"
97 	"\tuse a '-' for the second argument. If you do not pass a third\n"
98 	"\ta bd_info struct will be passed instead\n"
99 #endif
100 	"";
101 #endif
102 
103 U_BOOT_CMD(
104 	bootz,	CONFIG_SYS_MAXARGS,	1,	do_bootz,
105 	"boot Linux zImage image from memory", bootz_help_text
106 );
107