From 7a2eacb75946e0ebb81dfb36b50b5bec1c3cb50f Mon Sep 17 00:00:00 2001 From: Stuart Menefy Date: Mon, 26 Nov 2007 21:29:09 +0900 Subject: 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 Signed-off-by: Paul Mundt --- arch/sh/kernel/head_32.S | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S index 3338239717f1..d67d7ed09f22 100644 --- a/arch/sh/kernel/head_32.S +++ b/arch/sh/kernel/head_32.S @@ -32,7 +32,11 @@ ENTRY(empty_zero_page) .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 -- cgit v1.2.3-59-g8ed1b