From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Fri, 1 Jul 2005 10:56:55 +0000 (+0100)
Subject: [PATCH] ARM: Make the magic values in head.S more obvious
X-Git-Tag: upstream/snapshot3+hdmi~47810^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c77b042700ae1fc4d661d7d62787899e755160d5;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

[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 @@ __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