[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>
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index bd4823c..1155cf0 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -344,9 +344,9 @@
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 @@
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