cmd_bootm.c: Add 'booti' for ARM64 Linux kernel Images
The default format for arm64 Linux kernels is the "Image" format, described in Documentation/arm64/booting.txt. This, along with an optional gzip compression on top is all that is generated by default. The Image format has a magic number within the header for verification, a text_offset where the Image must be run from, an image_size that includes the BSS and reserved fields. This does not support automatic detection of a gzip compressed image. Signed-off-by: Tom Rini <trini@ti.com>utp
Tom Rini
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3f1b6bebe0
commit
d2b2ffe310
1
README
1
README
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@ -959,6 +959,7 @@ The following options need to be configured:
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CONFIG_CMD_BMP * BMP support
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CONFIG_CMD_BSP * Board specific commands
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CONFIG_CMD_BOOTD bootd
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CONFIG_CMD_BOOTI * ARM64 Linux kernel Image support
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CONFIG_CMD_CACHE * icache, dcache
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CONFIG_CMD_CLK * clock command support
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CONFIG_CMD_CONSOLE coninfo
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@ -627,3 +627,143 @@ U_BOOT_CMD(
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"boot Linux zImage image from memory", bootz_help_text
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);
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#endif /* CONFIG_CMD_BOOTZ */
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#ifdef CONFIG_CMD_BOOTI
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/* See Documentation/arm64/booting.txt in the Linux kernel */
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struct Image_header {
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uint32_t code0; /* Executable code */
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uint32_t code1; /* Executable code */
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uint64_t text_offset; /* Image load offset, LE */
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uint64_t image_size; /* Effective Image size, LE */
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uint64_t res1; /* reserved */
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uint64_t res2; /* reserved */
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uint64_t res3; /* reserved */
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uint64_t res4; /* reserved */
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uint32_t magic; /* Magic number */
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uint32_t res5;
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};
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#define LINUX_ARM64_IMAGE_MAGIC 0x644d5241
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static int booti_setup(bootm_headers_t *images)
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{
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struct Image_header *ih;
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uint64_t dst;
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ih = (struct Image_header *)map_sysmem(images->ep, 0);
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if (ih->magic != le32_to_cpu(LINUX_ARM64_IMAGE_MAGIC)) {
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puts("Bad Linux ARM64 Image magic!\n");
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return 1;
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}
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if (ih->image_size == 0) {
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puts("Image lacks image_size field, assuming 16MiB\n");
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ih->image_size = (16 << 20);
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}
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/*
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* If we are not at the correct run-time location, set the new
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* correct location and then move the image there.
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*/
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dst = gd->bd->bi_dram[0].start + le32_to_cpu(ih->text_offset);
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if (images->ep != dst) {
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void *src;
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debug("Moving Image from 0x%lx to 0x%llx\n", images->ep, dst);
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src = (void *)images->ep;
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images->ep = dst;
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memmove((void *)dst, src, le32_to_cpu(ih->image_size));
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}
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return 0;
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}
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/*
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* Image booting support
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*/
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static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc,
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char * const argv[], bootm_headers_t *images)
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{
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int ret;
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struct Image_header *ih;
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ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
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images, 1);
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/* Setup Linux kernel Image entry point */
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if (!argc) {
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images->ep = load_addr;
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debug("* kernel: default image load address = 0x%08lx\n",
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load_addr);
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} else {
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images->ep = simple_strtoul(argv[0], NULL, 16);
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debug("* kernel: cmdline image address = 0x%08lx\n",
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images->ep);
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}
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ret = booti_setup(images);
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if (ret != 0)
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return 1;
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ih = (struct Image_header *)map_sysmem(images->ep, 0);
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lmb_reserve(&images->lmb, images->ep, le32_to_cpu(ih->image_size));
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/*
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* Handle the BOOTM_STATE_FINDOTHER state ourselves as we do not
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* have a header that provide this informaiton.
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*/
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if (bootm_find_ramdisk_fdt(flag, argc, argv))
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return 1;
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return 0;
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}
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int do_booti(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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int ret;
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/* Consume 'booti' */
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argc--; argv++;
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if (booti_start(cmdtp, flag, argc, argv, &images))
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return 1;
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/*
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* We are doing the BOOTM_STATE_LOADOS state ourselves, so must
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* disable interrupts ourselves
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*/
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bootm_disable_interrupts();
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images.os.os = IH_OS_LINUX;
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ret = do_bootm_states(cmdtp, flag, argc, argv,
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BOOTM_STATE_OS_PREP | BOOTM_STATE_OS_FAKE_GO |
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BOOTM_STATE_OS_GO,
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&images, 1);
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return ret;
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}
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#ifdef CONFIG_SYS_LONGHELP
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static char booti_help_text[] =
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"[addr [initrd[:size]] [fdt]]\n"
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" - boot Linux Image stored in memory\n"
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"\tThe argument 'initrd' is optional and specifies the address\n"
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"\tof the initrd in memory. The optional argument ':size' allows\n"
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"\tspecifying the size of RAW initrd.\n"
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#if defined(CONFIG_OF_LIBFDT)
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"\tSince booting a Linux kernelrequires a flat device-tree\n"
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"\ta third argument is required which is the address of the\n"
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"\tdevice-tree blob. To boot that kernel without an initrd image,\n"
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"\tuse a '-' for the second argument.\n"
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#endif
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"";
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#endif
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U_BOOT_CMD(
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booti, CONFIG_SYS_MAXARGS, 1, do_booti,
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"boot arm64 Linux Image image from memory", booti_help_text
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);
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#endif /* CONFIG_CMD_BOOTI */
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@ -48,7 +48,7 @@ int boot_selected_os(int argc, char * const argv[], int state,
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ulong bootm_disable_interrupts(void);
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/* This is a special function used by bootz */
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/* This is a special function used by booti/bootz */
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int bootm_find_ramdisk_fdt(int flag, int argc, char * const argv[]);
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int do_bootm_states(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
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