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MIPS: Cosmetic cleanups of page table headers.

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* Clean up white spaces and tabs.
   * Remove _PAGE_R4KBUG which is no longer used.
   * Get rid of hardcoded values and calculate shifts and
     masks where possible.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8457/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Steven J. Hill 2014-11-13 09:52:01 -06:00 • committed by Ralf Baechle
parent 23d06e4fb7
commit 77a5c59332
3 changed files with 72 additions and 68 deletions
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32
arch/mips/include/asm/pgtable-bits.h
View file

@ -37,34 +37,36 @@
/*
* The following bits are directly used by the TLB hardware
*/
#define _PAGE_R4KBUG (1 << 0) /* workaround for r4k bug */
#define _PAGE_GLOBAL (1 << 0)
#define _PAGE_VALID_SHIFT 1
#define _PAGE_GLOBAL_SHIFT 0
#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
#define _PAGE_SILENT_READ (1 << 1) /* synonym */
#define _PAGE_DIRTY_SHIFT 2
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT) /* The MIPS dirty bit */
#define _PAGE_SILENT_WRITE (1 << 2)
#define _CACHE_SHIFT 3
#define _CACHE_MASK (7 << 3)
#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
#define _CACHE_SHIFT (_PAGE_DIRTY_SHIFT + 1)
#define _CACHE_MASK (7 << _CACHE_SHIFT)
/*
* The following bits are implemented in software
*
* _PAGE_FILE semantics: set:pagecache unset:swap
*/
#define _PAGE_PRESENT_SHIFT 6
#define _PAGE_PRESENT_SHIFT (_CACHE_SHIFT + 3)
#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
#define _PAGE_READ_SHIFT 7
#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1)
#define _PAGE_READ (1 << _PAGE_READ_SHIFT)
#define _PAGE_WRITE_SHIFT 8
#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1)
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
#define _PAGE_ACCESSED_SHIFT 9
#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1)
#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
#define _PAGE_MODIFIED_SHIFT 10
#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
#define _PAGE_FILE (1 << 10)
#define _PAGE_SILENT_READ _PAGE_VALID
#define _PAGE_SILENT_WRITE _PAGE_DIRTY
#define _PAGE_FILE _PAGE_MODIFIED
#define _PFN_SHIFT (PAGE_SHIFT - 12 + _CACHE_SHIFT + 3)
#elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)