mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-04 01:49:36 +00:00
Code Issues Releases Wiki Activity

sh: Provide a 29/32-bit physical hint for bootloaders.

Browse source 
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>
This commit is contained in:
Stuart Menefy 2007-11-26 21:29:09 +09:00 committed by Paul Mundt
parent 80a68a43d9
commit 7a2eacb759
1 changed files with 5 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
arch/sh/kernel/head_32.S
View file

@ -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