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https://github.com/brain-hackers/u-boot-brain
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![Atish Patra](/assets/img/avatar_default.png)
Add compressed Image parsing support so that booti can parse both flat and compressed Image to boot Linux. Currently, it is difficult to calculate a safe address for every board where the compressed image can be decompressed. It is also not possible to figure out the size of the compressed file as well. Thus, user need to set two additional environment variables kernel_comp_addr_r and filesize to make this work. Following compression methods are supported for now. lzma, lzo, bzip2, gzip. lz4 support is not added as ARM64 kernel generates a lz4 compressed image with legacy header which U-Boot doesn't know how to parse and decompress. Tested on HiFive Unleashed and Qemu for RISC-V. Tested on Qemu for ARM64. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Tom Rini <trini@konsulko.com> [trini: Fix minor rST formatting problems] Signed-off-by: Tom Rini <trini@konsulko.com>
158 lines
4.2 KiB
C
158 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2009
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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#include <common.h>
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#include <bootm.h>
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#include <command.h>
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#include <image.h>
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#include <irq_func.h>
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#include <lmb.h>
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#include <mapmem.h>
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#include <linux/kernel.h>
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#include <linux/sizes.h>
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DECLARE_GLOBAL_DATA_PTR;
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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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ulong ld;
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ulong relocated_addr;
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ulong image_size;
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uint8_t *temp;
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ulong dest;
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ulong dest_end;
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unsigned long comp_len;
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unsigned long decomp_len;
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int ctype;
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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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ld = image_load_addr;
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debug("* kernel: default image load address = 0x%08lx\n",
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image_load_addr);
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} else {
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ld = simple_strtoul(argv[0], NULL, 16);
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debug("* kernel: cmdline image address = 0x%08lx\n", ld);
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}
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temp = map_sysmem(ld, 0);
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ctype = image_decomp_type(temp, 2);
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if (ctype > 0) {
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dest = env_get_ulong("kernel_comp_addr_r", 16, 0);
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comp_len = env_get_ulong("kernel_comp_size", 16, 0);
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if (!dest || !comp_len) {
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puts("kernel_comp_addr_r or kernel_comp_size is not provided!\n");
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return -EINVAL;
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}
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if (dest < gd->ram_base || dest > gd->ram_top) {
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puts("kernel_comp_addr_r is outside of DRAM range!\n");
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return -EINVAL;
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}
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debug("kernel image compression type %d size = 0x%08lx address = 0x%08lx\n",
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ctype, comp_len, (ulong)dest);
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decomp_len = comp_len * 10;
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ret = image_decomp(ctype, 0, ld, IH_TYPE_KERNEL,
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(void *)dest, (void *)ld, comp_len,
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decomp_len, &dest_end);
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if (ret)
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return ret;
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/* dest_end contains the uncompressed Image size */
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memmove((void *) ld, (void *)dest, dest_end);
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}
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unmap_sysmem((void *)ld);
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ret = booti_setup(ld, &relocated_addr, &image_size, false);
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if (ret != 0)
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return 1;
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/* Handle BOOTM_STATE_LOADOS */
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if (relocated_addr != ld) {
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debug("Moving Image from 0x%lx to 0x%lx\n", ld, relocated_addr);
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memmove((void *)relocated_addr, (void *)ld, image_size);
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}
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images->ep = relocated_addr;
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images->os.start = relocated_addr;
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images->os.end = relocated_addr + image_size;
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lmb_reserve(&images->lmb, images->ep, le32_to_cpu(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_images(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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#ifdef CONFIG_RISCV_SMODE
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images.os.arch = IH_ARCH_RISCV;
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#elif CONFIG_ARM64
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images.os.arch = IH_ARCH_ARM64;
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#endif
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ret = do_bootm_states(cmdtp, flag, argc, argv,
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#ifdef CONFIG_SYS_BOOT_RAMDISK_HIGH
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BOOTM_STATE_RAMDISK |
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#endif
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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 flat or compressed 'Image' stored at 'addr'\n"
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"\tThe argument 'initrd' is optional and specifies the address\n"
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"\tof an initrd in memory. The optional parameter ':size' allows\n"
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"\tspecifying the size of a RAW initrd.\n"
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"\tCurrently only booting from gz, bz2, lzma and lz4 compression\n"
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"\ttypes are supported. In order to boot from any of these compressed\n"
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"\timages, user have to set kernel_comp_addr_r and kernel_comp_size enviornment\n"
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"\tvariables beforehand.\n"
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#if defined(CONFIG_OF_LIBFDT)
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"\tSince booting a Linux kernel requires a flat device-tree, a\n"
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"\tthird argument providing the address of the device-tree blob\n"
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"\tis required. To boot a kernel with a device-tree blob but\n"
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"\twithout an initrd image, use a '-' for the initrd 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 Linux kernel 'Image' format from memory", booti_help_text
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);
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