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sh: Preparation for uncached jumps through PMB.

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Presently most of the 29-bit physical parts do P1/P2 segmentation
with a 1:1 cached/uncached mapping, jumping between the two to
control the caching behaviour. This provides the basic infrastructure
to maintain this behaviour on 32-bit physical parts that don't map
P1/P2 at all, using a shiny new linker section and corresponding
fixmap entry.

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
2007-11-30 17:06:36 +09:00
committed by Paul Mundt
parent 325df7f204
commit cbaa118ecf
14 changed files with 88 additions and 56 deletions
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9
arch/sh/kernel/vmlinux_32.lds.S
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@@ -43,6 +43,15 @@ SECTIONS
NOTES
RO_DATA(PAGE_SIZE)
/*
* Code which must be executed uncached and the associated data
*/
. = ALIGN(PAGE_SIZE);
__uncached_start = .;
.uncached.text : { *(.uncached.text) }
.uncached.data : { *(.uncached.data) }
__uncached_end = .;
. = ALIGN(THREAD_SIZE);
.data : { /* Data */
*(.data.init_task)