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cmd/boot: Try decompressing kernel through GZIP

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This makes it possible to boot GZIP-compressed Linux kernel with
sysboot.

Signed-off-by: Yao Zi <ziyao@disroot.org>
This commit is contained in:
Yao Zi
2025-05-27 01:20:10 +00:00
committed by Han Gao
parent ac3b305def
commit c971a1448d
1 changed files with 27 additions and 0 deletions
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27
cmd/booti.c
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@@ -24,6 +24,10 @@ static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc,
ulong ld;
ulong relocated_addr;
ulong image_size;
char *tmp;
ulong dest_end;
ulong decomp_dst;
ulong comp_len;
ret = do_bootm_states(cmdtp, flag, argc, argv, BOOTM_STATE_START,
images, 1);
@@ -38,6 +42,29 @@ static int booti_start(cmd_tbl_t *cmdtp, int flag, int argc,
debug("* kernel: cmdline image address = 0x%08lx\n", ld);
}
tmp = map_sysmem(ld, 0);
decomp_dst = env_get_ulong("kernel_comp_addr_r", 16, 0);
comp_len = env_get_ulong("kernel_comp_size", 16, 0);
if (!decomp_dst || !comp_len) {
puts("kernel_comp_addr_r or kernel_comp_size aren't defined!\n");
return -EINVAL;
}
ret = image_decomp(IH_COMP_GZIP, 0, ld, IH_TYPE_KERNEL,
(void *)decomp_dst, (void *)ld, comp_len,
comp_len * 10, &dest_end);
if (!ret) {
printf("Kernel image compression size = 0x%08lx, address = 0x%08lx\n",
comp_len, decomp_dst);
memmove((void *)ld, (void *)decomp_dst, dest_end);
} else {
printf("failed to decompress kernel image: %d\n", ret);
}
ret = booti_setup(ld, &relocated_addr, &image_size, false);
if (ret != 0)
return 1;