[Qemu-devel] [PATCH] target-sh4: Fix initrd initialization for endiannes-mismatched targets

[Qemu-devel] [PATCH] target-sh4: Fix initrd initialization for endiannes-mismatched targets

[Guenter Roeck]

If host and target endianness does not match, loding an initrd does not
work, but results in a kernel log message similar to the following.

... MOUNT_ROOT_RDONLY - 00000000
... RAMDISK_FLAGS     - 00000000
... ORIG_ROOT_DEV     - 00000000
... LOADER_TYPE       - 01000000
... INITRD_START      - 00008001
... INITRD_SIZE       - 00a01b00
Booting machvec: RTS7751R2D
initrd must be page aligned
initrd disabled

Fix by writing boot parameters with appropriate endianness conversion.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 hw/sh4/r2d.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/sh4/r2d.c b/hw/sh4/r2d.c
index 321379e..d86eb12 100644
--- a/hw/sh4/r2d.c
+++ b/hw/sh4/r2d.c
@@ -336,9 +336,9 @@ static void r2d_init(MachineState *machine)
         }
 
         /* initialization which should be done by firmware */
-        boot_params.loader_type = 1;
-        boot_params.initrd_start = INITRD_LOAD_OFFSET;
-        boot_params.initrd_size = initrd_size;
+        boot_params.loader_type = tswap32(1);
+        boot_params.initrd_start = tswap32(INITRD_LOAD_OFFSET);
+        boot_params.initrd_size = tswap32(initrd_size);
     }
 
     if (kernel_cmdline) {
-- 
1.9.1