[ARM] nommu: fixups for the exception vectors

The high page vector (0xFFFF0000) does not supported in nommu mode.
This patch allows the vectors to be 0x00000000 or the begining of DRAM
in nommu mode.

Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 6 insertions, 5 deletions

diff --git a/arch/arm/kernel/signal.h b/arch/arm/kernel/signal.h
index 9991049c522d..27beece15502 100644
--- a/arch/arm/kernel/signal.h
+++ b/arch/arm/kernel/signal.h
@@ -7,6 +7,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#define KERN_SIGRETURN_CODE     0xffff0500
+#define KERN_SIGRETURN_CODE     (CONFIG_VECTORS_BASE + 0x00000500)
 
 extern const unsigned long sigreturn_codes[7];
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 03924bcc6129..32b0570329e7 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -688,6 +688,7 @@ EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
+        unsigned long vectors = CONFIG_VECTORS_BASE;
         extern char __stubs_start[], __stubs_end[];
         extern char __vectors_start[], __vectors_end[];
         extern char __kuser_helper_start[], __kuser_helper_end[];
@@ -698,9 +699,9 @@ void __init trap_init(void)
          * into the vector page, mapped at 0xffff0000, and ensure these
          * are visible to the instruction stream.
          */
-        memcpy((void *)0xffff0000, __vectors_start, __vectors_end - __vectors_start);
-        memcpy((void *)0xffff0200, __stubs_start, __stubs_end - __stubs_start);
-        memcpy((void *)0xffff1000 - kuser_sz, __kuser_helper_start, kuser_sz);
+        memcpy((void *)vectors, __vectors_start, __vectors_end - __vectors_start);
+        memcpy((void *)vectors + 0x200, __stubs_start, __stubs_end - __stubs_start);
+        memcpy((void *)vectors + 0x1000 - kuser_sz, __kuser_helper_start, kuser_sz);
 
         /*
          * Copy signal return handlers into the vector page, and
@@ -709,6 +710,6 @@ void __init trap_init(void)
         memcpy((void *)KERN_SIGRETURN_CODE, sigreturn_codes,
                sizeof(sigreturn_codes));
 
-        flush_icache_range(0xffff0000, 0xffff0000 + PAGE_SIZE);
+        flush_icache_range(vectors, vectors + PAGE_SIZE);
         modify_domain(DOMAIN_USER, DOMAIN_CLIENT);
 }