bootm: Support kernel_noload with compression
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>
diff --git a/boot/bootm.c b/boot/bootm.c
index e051a0c..7c1b4a3 100644
--- a/boot/bootm.c
+++ b/boot/bootm.c
@@ -410,6 +410,24 @@
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,