Add a function to read the ARM MPCore base address. This let's us

dynamically determine where e.g. the interrupt controller is.

ok bmercer@

2 files changed, 11 insertions, 2 deletions

diff --git a/sys/arch/arm/arm/cpufunc_asm_armv7.S b/sys/arch/arm/arm/cpufunc_asm_armv7.S
index 808bf49889e..54a0b67be57 100644
--- a/sys/arch/arm/arm/cpufunc_asm_armv7.S
+++ b/sys/arch/arm/arm/cpufunc_asm_armv7.S
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpufunc_asm_armv7.S,v 1.5 2013/03/27 00:20:00 patrick Exp $ */
+/* $OpenBSD: cpufunc_asm_armv7.S,v 1.6 2013/03/30 01:30:30 patrick Exp $ */
 /*
  * Copyright (c) 2008 Dale Rahn <drahn@openbsd.org>
  *
@@ -32,6 +32,13 @@ ENTRY(armv7_drain_writebuf)
 	mov	pc, lr
 
 /*
+ * Function to read the MPCore base address
+ */
+ENTRY(armv7_periphbase)
+	mrc	p15, 4, r0, c15, c0, 0
+	mov	pc, lr
+
+/*
  * Functions to set the MMU Translation Table Base register
  */
 ENTRY(armv7_setttb)
diff --git a/sys/arch/arm/include/cpufunc.h b/sys/arch/arm/include/cpufunc.h
index ca558d1d560..d76f3de5786 100644
--- a/sys/arch/arm/include/cpufunc.h
+++ b/sys/arch/arm/include/cpufunc.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cpufunc.h,v 1.13 2013/03/30 00:57:47 patrick Exp $	*/
+/*	$OpenBSD: cpufunc.h,v 1.14 2013/03/30 01:30:30 patrick Exp $	*/
 /*	$NetBSD: cpufunc.h,v 1.29 2003/09/06 09:08:35 rearnsha Exp $	*/
 
 /*
@@ -382,6 +382,8 @@ void	armv7_tlb_flushD_SE	(u_int va);
 void	armv7_drain_writebuf	(void);
 void	armv7_cpu_sleep		(int mode);
 
+u_int	armv7_periphbase	(void);
+
 void	armv7_icache_sync_all		(void);
 void	armv7_icache_sync_range		(vaddr_t, vsize_t);