Commit 7a2eacb7 authored Nov 26, 2007 by Stuart Menefy Committed by Paul Mundt Jan 28, 2008

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>

parent 80a68a43

arch/sh/kernel/head_32.S

+5 −1

Original line number	Diff line number	Diff line
		@@ -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

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