[PATCH] ARM: Make the magic values in head.S more obvious

Make the magic address values in head.S more obvious as to where
they came from.  Wrap all debug code in CONFIG_DEBUG_LL.

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

1 files changed, 8 insertions, 12 deletions

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index bd4823c74645..1155cf07c871 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -344,9 +344,9 @@ __create_page_tables:
         str     r6, [r0]
 #endif
 
+#ifdef CONFIG_DEBUG_LL
         bic     r7, r7, #0x0c                   @ turn off cacheable
                                                 @ and bufferable bits
-#ifdef CONFIG_DEBUG_LL
         /*
          * Map in IO space for serial debugging.
          * This allows debug messages to be output
@@ -372,28 +372,24 @@ __create_page_tables:
         teq     r1, #MACH_TYPE_NETWINDER
         teqne   r1, #MACH_TYPE_CATS
         bne     1f
-        add     r0, r4, #0x3fc0                 @ ff000000
-        mov     r3, #0x7c000000
-        orr     r3, r3, r7
-        str     r3, [r0], #4
-        add     r3, r3, #1 << 20
-        str     r3, [r0], #4
+        add     r0, r4, #0xff000000 >> 18
+        orr     r3, r7, #0x7c000000
+        str     r3, [r0]
 1:
 #endif
-#endif
 #ifdef CONFIG_ARCH_RPC
         /*
          * Map in screen at 0x02000000 & SCREEN2_BASE
          * Similar reasons here - for debug.  This is
          * only for Acorn RiscPC architectures.
          */
-        add     r0, r4, #0x80                   @ 02000000
-        mov     r3, #0x02000000
-        orr     r3, r3, r7
+        add     r0, r4, #0x02000000 >> 18
+        orr     r3, r7, #0x02000000
         str     r3, [r0]
-        add     r0, r4, #0x3600                 @ d8000000
+        add     r0, r4, #0xd8000000 >> 18
         str     r3, [r0]
 #endif
+#endif
         mov     pc, lr
         .ltorg