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authorCatalin Marinas <catalin.marinas@arm.com>2007-05-08 22:27:46 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-08 22:55:53 +0100
commitbbe888864ec32435e93923c40b9d6ce2bb73844b (patch)
treedb607482fe5898da9a599368d0bbe579a56b272c /arch/arm/mm/abort-ev7.S
parent5b94f675f57e4ff16c8fda09088d7480a84dcd91 (diff)
[ARM] armv7: add support for ARMv7 cores.
This patch adds support for the ARMv7 cores. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/abort-ev7.S')
-rw-r--r--arch/arm/mm/abort-ev7.S32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mm/abort-ev7.S b/arch/arm/mm/abort-ev7.S
new file mode 100644
index 000000000000..eb90bce38e14
--- /dev/null
+++ b/arch/arm/mm/abort-ev7.S
@@ -0,0 +1,32 @@
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+/*
+ * Function: v7_early_abort
+ *
+ * Params : r2 = address of aborted instruction
+ * : r3 = saved SPSR
+ *
+ * Returns : r0 = address of abort
+ * : r1 = FSR, bit 11 = write
+ * : r2-r8 = corrupted
+ * : r9 = preserved
+ * : sp = pointer to registers
+ *
+ * Purpose : obtain information about current aborted instruction.
+ */
+ .align 5
+ENTRY(v7_early_abort)
+ /*
+ * The effect of data aborts on on the exclusive access monitor are
+ * UNPREDICTABLE. Do a CLREX to clear the state
+ */
+ clrex
+
+ mrc p15, 0, r1, c5, c0, 0 @ get FSR
+ mrc p15, 0, r0, c6, c0, 0 @ get FAR
+
+ /*
+ * V6 code adjusts the returned DFSR.
+ * New designs should not need to patch up faults.
+ */
+ mov pc, lr