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[PATCH 1/4] Allow generic spaces.h to be included by platform specific o

To: ralf@linux-mips.org
Subject: [PATCH 1/4] Allow generic spaces.h to be included by platform specific ones
From: Franck Bui-Huu <vagabon.xyz@gmail.com>
Date: Tue, 27 Mar 2007 11:19:37 +0200
Cc: linux-mips@linux-mips.org
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Original-recipient: rfc822;linux-mips@linux-mips.org
References: <11749871802730-git-send-email-fbuihuu@gmail.com>
Sender: linux-mips-bounce@linux-mips.org
From: Franck Bui-Huu <fbuihuu@gmail.com>

Before this patch, when a platform needed to customize one constant in
spaces.h, they need to redefine all of them.

Now they can just redefine one constant and include the generic file
header at the end:

        #include <asm/mach-generic/spaces.h>

This patch doesn't allow to redefine CAC_BASE, IO_BASE and UNCAC_BASE
for 32 bits platforms because there's no need to do so.

This will avoid some macro duplications. It's important specially if
we'll add complex macros.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
---
 include/asm-mips/mach-generic/spaces.h |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/include/asm-mips/mach-generic/spaces.h 
b/include/asm-mips/mach-generic/spaces.h
index 0ae9997..9a3c521 100644
--- a/include/asm-mips/mach-generic/spaces.h
+++ b/include/asm-mips/mach-generic/spaces.h
@@ -16,13 +16,18 @@
 #define CAC_BASE               0x80000000
 #define IO_BASE                        0xa0000000
 #define UNCAC_BASE             0xa0000000
+
+#ifndef MAP_BASE
 #define MAP_BASE               0xc0000000
+#endif
 
 /*
  * This handles the memory map.
  * We handle pages at KSEG0 for kernels with 32 bit address space.
  */
+#ifndef PAGE_OFFSET
 #define PAGE_OFFSET            0x80000000UL
+#endif
 
 /*
  * Memory above this physical address will be considered highmem.
@@ -38,11 +43,13 @@
 /*
  * This handles the memory map.
  */
+#ifndef PAGE_OFFSET
 #ifdef CONFIG_DMA_NONCOHERENT
 #define PAGE_OFFSET    0x9800000000000000UL
 #else
 #define PAGE_OFFSET    0xa800000000000000UL
 #endif
+#endif
 
 /*
  * Memory above this physical address will be considered highmem.
@@ -53,14 +60,25 @@
 #define HIGHMEM_START          (1UL << 59UL)
 #endif
 
+#ifndef CAC_BASE
 #ifdef CONFIG_DMA_NONCOHERENT
 #define CAC_BASE               0x9800000000000000UL
 #else
 #define CAC_BASE               0xa800000000000000UL
 #endif
+#endif
+
+#ifndef IO_BASE
 #define IO_BASE                        0x9000000000000000UL
+#endif
+
+#ifndef UNCAC_BASE
 #define UNCAC_BASE             0x9000000000000000UL
+#endif
+
+#ifndef MAP_BASE
 #define MAP_BASE               0xc000000000000000UL
+#endif
 
 #define TO_PHYS(x)             (             ((x) & TO_PHYS_MASK))
 #define TO_CAC(x)              (CAC_BASE   | ((x) & TO_PHYS_MASK))
-- 
1.5.1.rc1.27.g1d848


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