sh: Provide a 29/32-bit physical hint for bootloaders.
Shoves a magic word in to the empty_zero_page section for the
bootloader to work out whether to start the kernel in 29-bit
or 32-bit mode.
[ Renesas CPUs already take care of the initial PMB mappings entirely
in hardware and decide on 29-bit/32-bit physical depending on which
pin powered up the CPU, so this is mostly for ST parts. -- PFM ].
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index 3338239..d67d7ed 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -32,7 +32,11 @@
.long 1 /* LOADER_TYPE */
.long 0x00360000 /* INITRD_START */
.long 0x000a0000 /* INITRD_SIZE */
- .long 0
+#ifdef CONFIG_32BIT
+ .long 0x53453f00 + 32 /* "SE?" = 32 bit */
+#else
+ .long 0x53453f00 + 29 /* "SE?" = 29 bit */
+#endif
1:
.skip PAGE_SIZE - empty_zero_page - 1b