UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

powerpc/boot: Fix boot on systems with uncompressed kernel image 

This commit broke boot on systems with an uncompressed kernel image,
namely systems using a cuImage. On such systems the compressed boot
image (boot wrapper, uncompressed kernel image, ..) is decompressed
by u-boot already, therefore the boot wrapper code sees an
uncompressed kernel image.

The old decompression code silently assumed an uncompressed kernel
image if it found no valid gzip signature, whilst the new code
bailed out in this case.

Fix this by re-introducing such a fallback if no valid compressed
image is found.

Fixes: 1b7898ee27 ("Use the pre-boot decompression API")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Heiner Kallweit 2016-10-12 21:00:43 +02:00 committed by Michael Ellerman
parent d2cf909cda
commit 65bc3ece84
1 changed files with 16 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
arch/powerpc/boot/main.c
View File

@ -32,9 +32,16 @@ static struct addr_range prep_kernel(void)
void *addr = 0;
struct elf_info ei;
long len;
int uncompressed_image = 0;
partial_decompress(vmlinuz_addr, vmlinuz_size,
len = partial_decompress(vmlinuz_addr, vmlinuz_size,
elfheader, sizeof(elfheader), 0);
/* assume uncompressed data if -1 is returned */
if (len == -1) {
uncompressed_image = 1;
memcpy(elfheader, vmlinuz_addr, sizeof(elfheader));
printf("No valid compressed data found, assume uncompressed data\n\r");
}
if (!parse_elf64(elfheader, &ei) && !parse_elf32(elfheader, &ei))
fatal("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
@ -67,6 +74,13 @@ static struct addr_range prep_kernel(void)
"device tree\n\r");
}
if (uncompressed_image) {
memcpy(addr, vmlinuz_addr + ei.elfoffset, ei.loadsize);
printf("0x%lx bytes of uncompressed data copied\n\r",
ei.loadsize);
goto out;
}
/* Finally, decompress the kernel */
printf("Decompressing (0x%p <- 0x%p:0x%p)...\n\r", addr,
vmlinuz_addr, vmlinuz_addr+vmlinuz_size);
@ -82,7 +96,7 @@ static struct addr_range prep_kernel(void)
len, ei.loadsize);
printf("Done! Decompressed 0x%lx bytes\n\r", len);
out:
flush_cache(addr, ei.loadsize);
return (struct addr_range){addr, ei.memsize};