From: Stuart Menefy Date: Mon, 26 Nov 2007 12:29:09 +0000 (+0900) Subject: sh: Provide a 29/32-bit physical hint for bootloaders. X-Git-Tag: v2.6.25-rc1~1169^2~56 X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=7a2eacb75946e0ebb81dfb36b50b5bec1c3cb50f;p=linux-2.6-omap-h63xx.git 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 --- diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S index 3338239717f..d67d7ed09f2 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