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authorRobin Getz <rgetz@blackfin.uclinux.org>2009-01-07 23:14:38 +0800
committerBryan Wu <cooloney@kernel.org>2009-01-07 23:14:38 +0800
commita45d575f53c9ed2926840377e59aa19e2024ee87 (patch)
tree0789f43eaee963ea5c4f4f011080b4e36a77c7eb /arch/blackfin/include/asm/processor.h
parentf768a0eb90831ced2129df6ccba6f1177fa5a0fa (diff)
Blackfin arch: Add basic irq stack checking for Blackfin
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/include/asm/processor.h')
-rw-r--r--arch/blackfin/include/asm/processor.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/processor.h b/arch/blackfin/include/asm/processor.h
index 2cb0b8711fa..83d57a85b14 100644
--- a/arch/blackfin/include/asm/processor.h
+++ b/arch/blackfin/include/asm/processor.h
@@ -24,6 +24,14 @@ static inline void wrusp(unsigned long usp)
__asm__ __volatile__("usp = %0;\n\t"::"da"(usp));
}
+static inline unsigned long __get_SP(void)
+{
+ unsigned long sp;
+
+ __asm__ __volatile__("%0 = sp;\n\t" : "=da"(sp));
+ return sp;
+}
+
/*
* User space process size: 1st byte beyond user address space.
* Fairly meaningless on nommu. Parts of user programs can be scattered