jcs.org
"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2000-2009
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 */
6
7#include <bootm.h>
8#include <command.h>
9#include <image.h>
10#include <irq_func.h>
11#include <lmb.h>
12#include <log.h>
13#include <mapmem.h>
14#include <asm/global_data.h>
15#include <linux/kernel.h>
16#include <linux/sizes.h>
17
18DECLARE_GLOBAL_DATA_PTR;
19/*
20 * Image booting support
21 */
22static int booti_start(struct bootm_info *bmi)
23{
24 struct bootm_headers *images = bmi->images;
25 int ret;
26 ulong ld;
27 ulong relocated_addr;
28 ulong image_size;
29 uint8_t *temp;
30 ulong dest;
31 ulong dest_end;
32 unsigned long comp_len;
33 unsigned long decomp_len;
34 int ctype;
35
36 ret = bootm_run_states(bmi, BOOTM_STATE_START);
37
38 /* Setup Linux kernel Image entry point */
39 if (!bmi->addr_img) {
40 ld = image_load_addr;
41 debug("* kernel: default image load address = 0x%08lx\n",
42 image_load_addr);
43 } else {
44 ld = hextoul(bmi->addr_img, NULL);
45 debug("* kernel: cmdline image address = 0x%08lx\n", ld);
46 }
47
48 temp = map_sysmem(ld, 0);
49 ctype = image_decomp_type(temp, 2);
50 if (ctype > 0) {
51 dest = env_get_ulong("kernel_comp_addr_r", 16, 0);
52 comp_len = env_get_ulong("kernel_comp_size", 16, 0);
53 if (!dest || !comp_len) {
54 puts("kernel_comp_addr_r or kernel_comp_size is not provided!\n");
55 return -EINVAL;
56 }
57 if (dest < gd->ram_base || dest > gd->ram_top) {
58 puts("kernel_comp_addr_r is outside of DRAM range!\n");
59 return -EINVAL;
60 }
61
62 debug("kernel image compression type %d size = 0x%08lx address = 0x%08lx\n",
63 ctype, comp_len, (ulong)dest);
64 decomp_len = comp_len * 10;
65 ret = image_decomp(ctype, 0, ld, IH_TYPE_KERNEL,
66 (void *)dest, (void *)ld, comp_len,
67 decomp_len, &dest_end);
68 if (ret)
69 return ret;
70 /* dest_end contains the uncompressed Image size */
71 memmove((void *) ld, (void *)dest, dest_end);
72 }
73 unmap_sysmem((void *)ld);
74
75 ret = booti_setup(ld, &relocated_addr, &image_size, false);
76 if (ret)
77 return 1;
78
79 /* Handle BOOTM_STATE_LOADOS */
80 if (relocated_addr != ld) {
81 printf("Moving Image from 0x%lx to 0x%lx, end=0x%lx\n", ld,
82 relocated_addr, relocated_addr + image_size);
83 memmove((void *)relocated_addr, (void *)ld, image_size);
84 }
85
86 images->ep = relocated_addr;
87 images->os.start = relocated_addr;
88 images->os.end = relocated_addr + image_size;
89
90 lmb_reserve(images->ep, le32_to_cpu(image_size), LMB_NONE);
91
92 /*
93 * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
94 * have a header that provide this informaiton.
95 */
96 if (bootm_find_images(image_load_addr, bmi->conf_ramdisk, bmi->conf_fdt,
97 relocated_addr, image_size))
98 return 1;
99
100 return 0;
101}
102
103int do_booti(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
104{
105 struct bootm_info bmi;
106 int states;
107 int ret;
108
109 /* Consume 'booti' */
110 argc--; argv++;
111
112 bootm_init(&bmi);
113 if (argc)
114 bmi.addr_img = argv[0];
115 if (argc > 1)
116 bmi.conf_ramdisk = argv[1];
117 if (argc > 2)
118 bmi.conf_fdt = argv[2];
119 bmi.boot_progress = true;
120 bmi.cmd_name = "booti";
121 /* do not set up argc and argv[] since nothing uses them */
122
123 if (booti_start(&bmi))
124 return 1;
125
126 /*
127 * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
128 * disable interrupts ourselves
129 */
130 bootm_disable_interrupts();
131
132 images.os.os = IH_OS_LINUX;
133 if (IS_ENABLED(CONFIG_RISCV_SMODE))
134 images.os.arch = IH_ARCH_RISCV;
135 else if (IS_ENABLED(CONFIG_ARM64))
136 images.os.arch = IH_ARCH_ARM64;
137
138 states = BOOTM_STATE_MEASURE | BOOTM_STATE_OS_PREP |
139 BOOTM_STATE_OS_FAKE_GO | BOOTM_STATE_OS_GO;
140 if (IS_ENABLED(CONFIG_SYS_BOOT_RAMDISK_HIGH))
141 states |= BOOTM_STATE_RAMDISK;
142
143 ret = bootm_run_states(&bmi, states);
144
145 return ret;
146}
147
148U_BOOT_LONGHELP(booti,
149 "[addr [initrd[:size]] [fdt]]\n"
150 " - boot Linux flat or compressed 'Image' stored at 'addr'\n"
151 "\tThe argument 'initrd' is optional and specifies the address\n"
152 "\tof an initrd in memory. The optional parameter ':size' allows\n"
153 "\tspecifying the size of a RAW initrd.\n"
154 "\tCurrently only booting from gz, bz2, lzma and lz4 compression\n"
155 "\ttypes are supported. In order to boot from any of these compressed\n"
156 "\timages, user have to set kernel_comp_addr_r and kernel_comp_size environment\n"
157 "\tvariables beforehand.\n"
158#if defined(CONFIG_OF_LIBFDT)
159 "\tSince booting a Linux kernel requires a flat device-tree, a\n"
160 "\tthird argument providing the address of the device-tree blob\n"
161 "\tis required. To boot a kernel with a device-tree blob but\n"
162 "\twithout an initrd image, use a '-' for the initrd argument.\n"
163#endif
164 );
165
166U_BOOT_CMD(
167 booti, CONFIG_SYS_MAXARGS, 1, do_booti,
168 "boot Linux kernel 'Image' format from memory", booti_help_text
169);