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authorStuart Menefy <stuart.menefy@st.com>2007-11-30 03:06:36 -0500
committerPaul Mundt <lethal@linux-sh.org>2008-01-27 23:18:59 -0500
commitcbaa118ecfd99fc5ed7adbd9c34a30e1c05e3c93 (patch)
treee60db5c0f3573558c97f39cfab78732220a72e6d /arch/sh/kernel/cpu/sh3/probe.c
parent325df7f20467da07901c4f2b006d3457bba0adec (diff)
sh: Preparation for uncached jumps through PMB.
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>
Diffstat (limited to 'arch/sh/kernel/cpu/sh3/probe.c')
-rw-r--r--arch/sh/kernel/cpu/sh3/probe.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/sh/kernel/cpu/sh3/probe.c b/arch/sh/kernel/cpu/sh3/probe.c
index bf579e061e09..22070e43e34d 100644
--- a/arch/sh/kernel/cpu/sh3/probe.c
+++ b/arch/sh/kernel/cpu/sh3/probe.c
@@ -16,11 +16,11 @@
16#include <asm/cache.h> 16#include <asm/cache.h>
17#include <asm/io.h> 17#include <asm/io.h>
18 18
19int __init detect_cpu_and_cache_system(void) 19int __uses_jump_to_uncached detect_cpu_and_cache_system(void)
20{ 20{
21 unsigned long addr0, addr1, data0, data1, data2, data3; 21 unsigned long addr0, addr1, data0, data1, data2, data3;
22 22
23 jump_to_P2(); 23 jump_to_uncached();
24 /* 24 /*
25 * Check if the entry shadows or not. 25 * Check if the entry shadows or not.
26 * When shadowed, it's 128-entry system. 26 * When shadowed, it's 128-entry system.
@@ -48,7 +48,7 @@ int __init detect_cpu_and_cache_system(void)
48 ctrl_outl(data0&~SH_CACHE_VALID, addr0); 48 ctrl_outl(data0&~SH_CACHE_VALID, addr0);
49 ctrl_outl(data2&~SH_CACHE_VALID, addr1); 49 ctrl_outl(data2&~SH_CACHE_VALID, addr1);
50 50
51 back_to_P1(); 51 back_to_cached();
52 52
53 boot_cpu_data.dcache.ways = 4; 53 boot_cpu_data.dcache.ways = 4;
54 boot_cpu_data.dcache.entry_shift = 4; 54 boot_cpu_data.dcache.entry_shift = 4;