Commit 8b418616 authored Jun 25, 2011 by Russell King

ARM: entry: prefetch abort helper: pass aborted pc in r4 rather than r0



This avoids unnecessary instructions for CPUs which implement the IFAR
(instruction fault address register).

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent b059bdc3

arch/arm/kernel/entry-armv.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -45,7 +45,7 @@
		.endm

		.macro pabt_helper
		mov r0, r4 @ pass address of aborted instruction.
		@ PABORT handler takes fault address in r4
		#ifdef MULTI_PABORT
		ldr ip, .LCprocfns
		mov lr, pc

arch/arm/mm/pabort-legacy.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -4,7 +4,7 @@
		/*
		* Function: legacy_pabort
		*
		* Params : r0 = address of aborted instruction
		* Params : r4 = address of aborted instruction
		*
		* Returns : r0 = address of abort
		* : r1 = Simulated IFSR with section translation fault status
		@@ -14,6 +14,7 @@

		.align 5
		ENTRY(legacy_pabort)
		mov r0, r4
		mov r1, #5
		mov pc, lr
		ENDPROC(legacy_pabort)

arch/arm/mm/pabort-v6.S

+2 −1

Original line number	Diff line number	Diff line
		@@ -4,7 +4,7 @@
		/*
		* Function: v6_pabort
		*
		* Params : r0 = address of aborted instruction
		* Params : r4 = address of aborted instruction
		*
		* Returns : r0 = address of abort
		* : r1 = IFSR
		@@ -14,6 +14,7 @@

		.align 5
		ENTRY(v6_pabort)
		mov r0, r4
		mrc p15, 0, r1, c5, c0, 1 @ get IFSR
		mov pc, lr
		ENDPROC(v6_pabort)

arch/arm/mm/pabort-v7.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -4,7 +4,7 @@
		/*
		* Function: v6_pabort
		*
		* Params : r0 = address of aborted instruction
		* Params : r4 = address of aborted instruction
		*
		* Returns : r0 = address of abort
		* : r1 = IFSR