]>
git.ipfire.org Git - people/ms/u-boot.git/blob - cmd/booti.c
2 * (C) Copyright 2000-2009
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
14 #include <linux/kernel.h>
15 #include <linux/sizes.h>
17 DECLARE_GLOBAL_DATA_PTR
;
19 /* See Documentation/arm64/booting.txt in the Linux kernel */
21 uint32_t code0
; /* Executable code */
22 uint32_t code1
; /* Executable code */
23 uint64_t text_offset
; /* Image load offset, LE */
24 uint64_t image_size
; /* Effective Image size, LE */
25 uint64_t flags
; /* Kernel flags, LE */
26 uint64_t res2
; /* reserved */
27 uint64_t res3
; /* reserved */
28 uint64_t res4
; /* reserved */
29 uint32_t magic
; /* Magic number */
33 #define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
35 static int booti_setup(bootm_headers_t
*images
)
37 struct Image_header
*ih
;
39 uint64_t image_size
, text_offset
;
41 ih
= (struct Image_header
*)map_sysmem(images
->ep
, 0);
43 if (ih
->magic
!= le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC
)) {
44 puts("Bad Linux ARM64 Image magic!\n");
49 * Prior to Linux commit a2c1d73b94ed, the text_offset field
50 * is of unknown endianness. In these cases, the image_size
51 * field is zero, and we can assume a fixed value of 0x80000.
53 if (ih
->image_size
== 0) {
54 puts("Image lacks image_size field, assuming 16MiB\n");
55 image_size
= 16 << 20;
56 text_offset
= 0x80000;
58 image_size
= le64_to_cpu(ih
->image_size
);
59 text_offset
= le64_to_cpu(ih
->text_offset
);
63 * If bit 3 of the flags field is set, the 2MB aligned base of the
64 * kernel image can be anywhere in physical memory, so respect
65 * images->ep. Otherwise, relocate the image to the base of RAM
66 * since memory below it is not accessible via the linear mapping.
68 if (le64_to_cpu(ih
->flags
) & BIT(3))
69 dst
= images
->ep
- text_offset
;
71 dst
= gd
->bd
->bi_dram
[0].start
;
73 dst
= ALIGN(dst
, SZ_2M
) + text_offset
;
77 if (images
->ep
!= dst
) {
80 debug("Moving Image from 0x%lx to 0x%llx\n", images
->ep
, dst
);
82 src
= (void *)images
->ep
;
84 memmove((void *)dst
, src
, image_size
);
91 * Image booting support
93 static int booti_start(cmd_tbl_t
*cmdtp
, int flag
, int argc
,
94 char * const argv
[], bootm_headers_t
*images
)
97 struct Image_header
*ih
;
99 ret
= do_bootm_states(cmdtp
, flag
, argc
, argv
, BOOTM_STATE_START
,
102 /* Setup Linux kernel Image entry point */
104 images
->ep
= load_addr
;
105 debug("* kernel: default image load address = 0x%08lx\n",
108 images
->ep
= simple_strtoul(argv
[0], NULL
, 16);
109 debug("* kernel: cmdline image address = 0x%08lx\n",
113 ret
= booti_setup(images
);
117 ih
= (struct Image_header
*)map_sysmem(images
->ep
, 0);
119 lmb_reserve(&images
->lmb
, images
->ep
, le32_to_cpu(ih
->image_size
));
124 * Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
125 * have a header that provide this informaiton.
127 if (bootm_find_images(flag
, argc
, argv
))
133 int do_booti(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
137 /* Consume 'booti' */
140 if (booti_start(cmdtp
, flag
, argc
, argv
, &images
))
144 * We are doing the BOOTM_STATE_LOADOS state ourselves, so must
145 * disable interrupts ourselves
147 bootm_disable_interrupts();
149 images
.os
.os
= IH_OS_LINUX
;
150 images
.os
.arch
= IH_ARCH_ARM64
;
151 ret
= do_bootm_states(cmdtp
, flag
, argc
, argv
,
152 #ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
153 BOOTM_STATE_RAMDISK
|
155 BOOTM_STATE_OS_PREP
| BOOTM_STATE_OS_FAKE_GO
|
162 #ifdef CONFIG_SYS_LONGHELP
163 static char booti_help_text
[] =
164 "[addr [initrd[:size]] [fdt]]\n"
165 " - boot arm64 Linux Image stored in memory\n"
166 "\tThe argument 'initrd' is optional and specifies the address\n"
167 "\tof an initrd in memory. The optional parameter ':size' allows\n"
168 "\tspecifying the size of a RAW initrd.\n"
169 #if defined(CONFIG_OF_LIBFDT)
170 "\tSince booting a Linux kernel requires a flat device-tree, a\n"
171 "\tthird argument providing the address of the device-tree blob\n"
172 "\tis required. To boot a kernel with a device-tree blob but\n"
173 "\twithout an initrd image, use a '-' for the initrd argument.\n"
179 booti
, CONFIG_SYS_MAXARGS
, 1, do_booti
,
180 "boot arm64 Linux Image image from memory", booti_help_text