Merge branch 'master' of git://www.denx.de/git/u-boot-imx

[karo-tx-uboot.git] / arch / arm / lib / relocate.S

diff --git a/arch/arm/lib/relocate.S b/arch/arm/lib/relocate.S
index 803525156314e2b4b59a73d296965f773095041a..b4a258ce5c7917ca61bbaa5896036e57673f90d2 100644 (file)
--- a/arch/arm/lib/relocate.S
+++ b/arch/arm/lib/relocate.S
@@ -6,6 +6,8 @@
  * SPDX-License-Identifier:    GPL-2.0+
  */
 
+#include <asm-offsets.h>
+#include <config.h>
 #include <linux/linkage.h>
 
 /*
@@ -52,6 +54,34 @@ fixnext:
        cmp     r2, r3
        blo     fixloop
 
+       /*
+        * Relocate the exception vectors
+        */
+#ifdef CONFIG_HAS_VBAR
+       /*
+        * If the ARM processor has the security extensions,
+        * use VBAR to relocate the exception vectors.
+        */
+       ldr     r0, [r9, #GD_RELOCADDR] /* r0 = gd->relocaddr */
+       mcr     p15, 0, r0, c12, c0, 0  /* Set VBAR */
+#else
+       /*
+        * Copy the relocated exception vectors to the
+        * correct address
+        * CP15 c1 V bit gives us the location of the vectors:
+        * 0x00000000 or 0xFFFF0000.
+        */
+       ldr     r0, [r9, #GD_RELOCADDR] /* r0 = gd->relocaddr */
+       mrc     p15, 0, r2, c1, c0, 0   /* V bit (bit[13]) in CP15 c1 */
+       ands    r2, r2, #(1 << 13)
+       ldreq   r1, =0x00000000         /* If V=0 */
+       ldrne   r1, =0xFFFF0000         /* If V=1 */
+       ldmia   r0!, {r2-r8,r10}
+       stmia   r1!, {r2-r8,r10}
+       ldmia   r0!, {r2-r8,r10}
+       stmia   r1!, {r2-r8,r10}
+#endif
+
 relocate_done:
 
 #ifdef __XSCALE__