[PULL 061/102] ppc/ppc405: Change kernel load address

[Cédric Le Goater]

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>
---
 hw/ppc/ppc405_boards.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ppc/ppc405_boards.c b/hw/ppc/ppc405_boards.c
index 972a7a4a3e5d..b4249f4626e6 100644
--- a/hw/ppc/ppc405_boards.c
+++ b/hw/ppc/ppc405_boards.c
@@ -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
-- 
2.31.1