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ppc/ppc405: Change kernel load address

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The default addresses to load the kernel, fdt, initrd of AMCC boards
in U-Boot v2015.10 are :

	"kernel_addr_r=1000000\0"
	"fdt_addr_r=1800000\0"
	"ramdisk_addr_r=1900000\0"

The taihu is one of these boards, the ref405ep is not but we don't
have much information on it and both boards have a very similar
address space layout.

Also, if loaded at address 0, U-Boot will partially overwrite the
uImage because of a bug in get_ram_size() (U-Boot v2015.10) not
restoring properly the probed RAM contents and because the exception
vectors are installed in the same range. Finally, a gzipped kernel
image will be uncompressed at 0x0. These are all good reasons for not
mappping a kernel image at this address.

Change the kernel load address to match U-Boot expectations and fix
loading.

Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211202191446.1292125-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211206103712.1866296-2-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Cédric Le Goater 2021-12-17 17:57:17 +01:00
parent c8f49e6b93
commit 82f64c2384
1 changed files with 1 additions and 1 deletions
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2
hw/ppc/ppc405_boards.c
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@ -45,7 +45,7 @@
#define BIOS_FILENAME "ppc405_rom.bin"
#define BIOS_SIZE (2 * MiB)
#define KERNEL_LOAD_ADDR 0x00000000
#define KERNEL_LOAD_ADDR 0x01000000
#define INITRD_LOAD_ADDR 0x01800000
#define USE_FLASH_BIOS