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bootm: Support kernel_noload with compression

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It is not currently possible to execute the kernel in-place without
loading it. Use lmb to allocate memory for it.

Co-developed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Simon Glass 2023-11-19 07:43:34 -07:00 • committed by Tom Rini
parent bb07cdb191
commit 69544c4fd8
1 changed files with 18 additions and 0 deletions
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18
boot/bootm.c
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@ -410,6 +410,24 @@ static int bootm_load_os(struct bootm_headers *images, int boot_progress)
void *load_buf, *image_buf;
int err;
/*
* For a "noload" compressed kernel we need to allocate a buffer large
* enough to decompress in to and use that as the load address now.
* Assume that the kernel compression is at most a factor of 4 since
* zstd almost achieves that.
* Use an alignment of 2MB since this might help arm64
*/
if (os.type == IH_TYPE_KERNEL_NOLOAD && os.comp != IH_COMP_NONE) {
ulong req_size = ALIGN(image_len * 4, SZ_1M);
load = lmb_alloc(&images->lmb, req_size, SZ_2M);
if (!load)
return 1;
os.load = load;
debug("Allocated %lx bytes at %lx for kernel (size %lx) decompression\n",
req_size, load, image_len);
}
load_buf = map_sysmem(load, 0);
image_buf = map_sysmem(os.image_start, image_len);
err = image_decomp(os.comp, load, os.image_start, os.type,