Author: ian
Date: Sun Mar 31 22:43:16 2013
New Revision: 248962
URL: http://svnweb.freebsd.org/changeset/base/248962
Log:
When running on armv6, set alignment checking to modulo-4 mode rather
than modulo-8, because clang emits ldrd and strd instructions for
addresses that are only 4-byte aligned
Modified:
head/sys/boot/arm/uboot/start.S
Modified: head/sys/boot/arm/uboot/start.S
==============================================================================
--- head/sys/boot/arm/uboot/start.S Sun Mar 31 22:42:25 2013
(r248961)
+++ head/sys/boot/arm/uboot/start.S Sun Mar 31 22:43:16 2013
(r248962)
@@ -27,6 +27,7 @@
*/
#include <machine/asm.h>
+#include <machine/armreg.h>
/*
* Entry point to the loader that U-Boot passes control to.
@@ -42,6 +43,13 @@ _start:
ldr ip, =saved_regs
str r8, [ip, #0]
+#ifdef _ARM_ARCH_6
+ mrc p15, 0, r2, c1, c0, 0
+ orr r2, r2, #(CPU_CONTROL_UNAL_ENABLE)
+ orr r2, r2, #(CPU_CONTROL_AFLT_ENABLE)
+ mcr p15, 0, r2, c1, c0, 0
+#endif
+
/* Start loader */
b main
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