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authorPaul Mundt <lethal@linux-sh.org>2006-09-27 17:19:13 +0900
committerPaul Mundt <lethal@linux-sh.org>2006-09-27 17:19:13 +0900
commite7f93a355c7e32c26eab8910cf53b7506bb046c5 (patch)
tree0f4f2e60423a2c4c70134e6734b57b97e277af65 /arch/sh/mm
parentadf1890b0cd63f754b2171b73e4d845c0950d407 (diff)
downloadop-kernel-dev-e7f93a355c7e32c26eab8910cf53b7506bb046c5.zip
op-kernel-dev-e7f93a355c7e32c26eab8910cf53b7506bb046c5.tar.gz
sh: Make PAGE_OFFSET configurable.
nommu needs to be able to shift PAGE_OFFSET, so we switch it to a non-user-visible CONFIG_PAGE_OFFSET and use that in the few places where it matters. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r--arch/sh/mm/Kconfig31
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 9064dfc..f25903a 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -161,6 +161,37 @@ config MMU
turning this off will boot the kernel on these machines with the
MMU implicitly switched off.
+config PAGE_OFFSET
+ hex
+ default "0x80000000" if MMU
+ default "0x00000000"
+
+config MEMORY_START
+ hex "Physical memory start address"
+ default "0x08000000"
+ ---help---
+ Computers built with Hitachi SuperH processors always
+ map the ROM starting at address zero. But the processor
+ does not specify the range that RAM takes.
+
+ The physical memory (RAM) start address will be automatically
+ set to 08000000. Other platforms, such as the Solution Engine
+ boards typically map RAM at 0C000000.
+
+ Tweak this only when porting to a new machine which does not
+ already have a defconfig. Changing it from the known correct
+ value on any of the known systems will only lead to disaster.
+
+config MEMORY_SIZE
+ hex "Physical memory size"
+ default "0x00400000"
+ help
+ This sets the default memory size assumed by your SH kernel. It can
+ be overridden as normal by the 'mem=' argument on the kernel command
+ line. If unsure, consult your board specifications or just leave it
+ as 0x00400000 which was the default value before this became
+ configurable.
+
config 32BIT
bool "Support 32-bit physical addressing through PMB"
depends on CPU_SH4A
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