diff options
author | Franck Bui-Huu <fbuihuu@gmail.com> | 2007-06-04 11:46:35 -0400 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2007-07-10 12:32:57 -0400 |
commit | b1c65b3988c6e29ac371ab1cbbf6c4f8fb7092f8 (patch) | |
tree | ba2927d45030cf317fbda3534b7d56a8b13f0a11 /include/asm-mips/page.h | |
parent | 41b0483ee54d89f9ad068ceae3c91cdc7594d050 (diff) |
[MIPS] Fix PHYS_OFFSET for 64-bits kernels with 32-bits symbols
The current implementation of __pa() for 64-bits kernels with 32-bits
symbols is broken. In this configuration, we need 2 values for
PAGE_OFFSET, one in XKPHYS and the other in CKSEG0 space.
When the value in CKSEG0 space is used, it doesn't take into account
of PHYS_OFFSET. Even worse we can't redefine this value.
The patch restores CPHYSADDR() but in __pa()'s implementation because
it removes the need of 2 PAGE_OFFSET.
OTOH, CPHYSADDR() is quite bad when dealing with mapped kernels. So
this patch assumes there's no need to deal with such kernel in 64-bits
world.
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/page.h')
-rw-r--r-- | include/asm-mips/page.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h index c56c6a85908d..b92dd8c760da 100644 --- a/include/asm-mips/page.h +++ b/include/asm-mips/page.h | |||
@@ -35,7 +35,7 @@ | |||
35 | #ifndef __ASSEMBLY__ | 35 | #ifndef __ASSEMBLY__ |
36 | 36 | ||
37 | #include <linux/pfn.h> | 37 | #include <linux/pfn.h> |
38 | #include <linux/io.h> | 38 | #include <asm/io.h> |
39 | 39 | ||
40 | /* | 40 | /* |
41 | * It's normally defined only for FLATMEM config but it's | 41 | * It's normally defined only for FLATMEM config but it's |
@@ -143,11 +143,15 @@ typedef struct { unsigned long pgprot; } pgprot_t; | |||
143 | * __pa()/__va() should be used only during mem init. | 143 | * __pa()/__va() should be used only during mem init. |
144 | */ | 144 | */ |
145 | #if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64) | 145 | #if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64) |
146 | #define __pa_page_offset(x) ((unsigned long)(x) < CKSEG0 ? PAGE_OFFSET : CKSEG0) | 146 | #define __pa(x) \ |
147 | ({ \ | ||
148 | unsigned long __x = (unsigned long)(x); \ | ||
149 | __x < CKSEG0 ? XPHYSADDR(__x) : CPHYSADDR(__x); \ | ||
150 | }) | ||
147 | #else | 151 | #else |
148 | #define __pa_page_offset(x) PAGE_OFFSET | 152 | #define __pa(x) \ |
153 | ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) | ||
149 | #endif | 154 | #endif |
150 | #define __pa(x) ((unsigned long)(x) - __pa_page_offset(x) + PHYS_OFFSET) | ||
151 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) | 155 | #define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET)) |
152 | #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0)) | 156 | #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0)) |
153 | 157 | ||