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MIPS: Usage and cosmetic cleanups of page table bits.
* Clean up white spaces and tabs. * Get rid of remaining hardcoded values for calculating shifts and masks. * Get rid of redundant macro values. * Do not use page table bits directly in #ifdef's. Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9287/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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661af35e5f
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2 changed files with 38 additions and 62 deletions
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@ -35,7 +35,7 @@
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#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
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/*
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* The following bits are directly used by the TLB hardware
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* The following bits are implemented by the TLB hardware
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*/
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#define _PAGE_GLOBAL_SHIFT 0
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#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
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@ -48,8 +48,6 @@
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/*
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* The following bits are implemented in software
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*
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* _PAGE_FILE semantics: set:pagecache unset:swap
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*/
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#define _PAGE_PRESENT_SHIFT (_CACHE_SHIFT + 3)
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#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
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@ -62,48 +60,40 @@
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#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
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#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
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#define _PAGE_SILENT_READ _PAGE_VALID
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#define _PAGE_SILENT_WRITE _PAGE_DIRTY
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#define _PAGE_FILE _PAGE_MODIFIED
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#define _PFN_SHIFT (PAGE_SHIFT - 12 + _CACHE_SHIFT + 3)
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#elif defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
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/*
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* The following are implemented by software
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*
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* _PAGE_FILE semantics: set:pagecache unset:swap
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* The following bits are implemented in software
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*/
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#define _PAGE_PRESENT_SHIFT 0
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#define _PAGE_PRESENT_SHIFT (0)
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#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
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#define _PAGE_READ_SHIFT 1
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#define _PAGE_READ_SHIFT (_PAGE_PRESENT_SHIFT + 1)
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#define _PAGE_READ (1 << _PAGE_READ_SHIFT)
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#define _PAGE_WRITE_SHIFT 2
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#define _PAGE_WRITE_SHIFT (_PAGE_READ_SHIFT + 1)
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#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
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#define _PAGE_ACCESSED_SHIFT 3
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#define _PAGE_ACCESSED_SHIFT (_PAGE_WRITE_SHIFT + 1)
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#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
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#define _PAGE_MODIFIED_SHIFT 4
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#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
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#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
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#define _PAGE_FILE_SHIFT 4
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#define _PAGE_FILE (1 << _PAGE_FILE_SHIFT)
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/*
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* And these are the hardware TLB bits
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* The following bits are implemented by the TLB hardware
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*/
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#define _PAGE_GLOBAL_SHIFT 8
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#define _PAGE_GLOBAL_SHIFT (_PAGE_MODIFIED_SHIFT + 4)
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#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
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#define _PAGE_VALID_SHIFT 9
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#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
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#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
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#define _PAGE_SILENT_READ (1 << _PAGE_VALID_SHIFT) /* synonym */
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#define _PAGE_DIRTY_SHIFT 10
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#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
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#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
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#define _PAGE_SILENT_WRITE (1 << _PAGE_DIRTY_SHIFT)
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#define _CACHE_UNCACHED_SHIFT 11
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#define _CACHE_UNCACHED_SHIFT (_PAGE_DIRTY_SHIFT + 1)
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#define _CACHE_UNCACHED (1 << _CACHE_UNCACHED_SHIFT)
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#define _CACHE_MASK (1 << _CACHE_UNCACHED_SHIFT)
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#define _CACHE_MASK _CACHE_UNCACHED
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#else /* 'Normal' r4K case */
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#define _PFN_SHIFT PAGE_SHIFT
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#else
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/*
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* When using the RI/XI bit support, we have 13 bits of flags below
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* the physical address. The RI/XI bits are placed such that a SRL 5
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@ -114,11 +104,8 @@
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/*
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* The following bits are implemented in software
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*
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* _PAGE_READ / _PAGE_READ_SHIFT should be unused if cpu_has_rixi.
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* _PAGE_FILE semantics: set:pagecache unset:swap
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*/
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#define _PAGE_PRESENT_SHIFT (0)
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#define _PAGE_PRESENT_SHIFT 0
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#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
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#define _PAGE_READ_SHIFT (cpu_has_rixi ? _PAGE_PRESENT_SHIFT : _PAGE_PRESENT_SHIFT + 1)
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#define _PAGE_READ ({BUG_ON(cpu_has_rixi); 1 << _PAGE_READ_SHIFT; })
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@ -128,22 +115,16 @@
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#define _PAGE_ACCESSED (1 << _PAGE_ACCESSED_SHIFT)
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#define _PAGE_MODIFIED_SHIFT (_PAGE_ACCESSED_SHIFT + 1)
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#define _PAGE_MODIFIED (1 << _PAGE_MODIFIED_SHIFT)
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#define _PAGE_FILE (_PAGE_MODIFIED)
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#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
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/* huge tlb page */
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#define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT + 1)
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#define _PAGE_HUGE (1 << _PAGE_HUGE_SHIFT)
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#else
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#define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT)
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#define _PAGE_HUGE ({BUG(); 1; }) /* Dummy value */
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#endif
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#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
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/* huge tlb page */
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#define _PAGE_SPLITTING_SHIFT (_PAGE_HUGE_SHIFT + 1)
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#define _PAGE_SPLITTING (1 << _PAGE_SPLITTING_SHIFT)
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#else
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#define _PAGE_HUGE_SHIFT (_PAGE_MODIFIED_SHIFT)
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#define _PAGE_HUGE ({BUG(); 1; }) /* Dummy value */
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#define _PAGE_SPLITTING_SHIFT (_PAGE_HUGE_SHIFT)
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#define _PAGE_SPLITTING ({BUG(); 1; }) /* Dummy value */
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#endif
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@ -158,17 +139,10 @@
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#define _PAGE_GLOBAL_SHIFT (_PAGE_NO_READ_SHIFT + 1)
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#define _PAGE_GLOBAL (1 << _PAGE_GLOBAL_SHIFT)
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#define _PAGE_VALID_SHIFT (_PAGE_GLOBAL_SHIFT + 1)
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#define _PAGE_VALID (1 << _PAGE_VALID_SHIFT)
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/* synonym */
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#define _PAGE_SILENT_READ (_PAGE_VALID)
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/* The MIPS dirty bit */
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#define _PAGE_DIRTY_SHIFT (_PAGE_VALID_SHIFT + 1)
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#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
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#define _PAGE_SILENT_WRITE (_PAGE_DIRTY)
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#define _CACHE_SHIFT (_PAGE_DIRTY_SHIFT + 1)
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#define _CACHE_MASK (7 << _CACHE_SHIFT)
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@ -176,9 +150,13 @@
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#endif /* defined(CONFIG_PHYS_ADDR_T_64BIT && defined(CONFIG_CPU_MIPS32) */
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#ifndef _PFN_SHIFT
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#define _PFN_SHIFT PAGE_SHIFT
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#endif
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/*
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* _PAGE_FILE semantics: set:pagecache unset:swap
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*/
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#define _PAGE_FILE _PAGE_MODIFIED
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#define _PAGE_SILENT_READ _PAGE_VALID
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#define _PAGE_SILENT_WRITE _PAGE_DIRTY
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#define _PFN_MASK (~((1 << (_PFN_SHIFT)) - 1))
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#ifndef _PAGE_NO_READ
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@ -188,9 +166,6 @@
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#ifndef _PAGE_NO_EXEC
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#define _PAGE_NO_EXEC ({BUG(); 0; })
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#endif
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#ifndef _PAGE_GLOBAL_SHIFT
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#define _PAGE_GLOBAL_SHIFT ilog2(_PAGE_GLOBAL)
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#endif
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#ifndef __ASSEMBLY__
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@ -275,8 +250,9 @@ static inline uint64_t pte_to_entrylo(unsigned long pte_val)
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#endif
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#define __READABLE (_PAGE_SILENT_READ | _PAGE_ACCESSED | (cpu_has_rixi ? 0 : _PAGE_READ))
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#define __WRITEABLE (_PAGE_WRITE | _PAGE_SILENT_WRITE | _PAGE_MODIFIED)
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#define __WRITEABLE (_PAGE_SILENT_WRITE | _PAGE_WRITE | _PAGE_MODIFIED)
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#define _PAGE_CHG_MASK (_PFN_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | _CACHE_MASK)
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#define _PAGE_CHG_MASK (_PAGE_ACCESSED | _PAGE_MODIFIED | \
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_PFN_MASK | _CACHE_MASK)
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#endif /* _ASM_PGTABLE_BITS_H */
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@ -344,7 +344,7 @@ static inline pte_t pte_mkyoung(pte_t pte)
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return pte;
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}
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#ifdef _PAGE_HUGE
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#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
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static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; }
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static inline pte_t pte_mkhuge(pte_t pte)
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@ -352,7 +352,7 @@ static inline pte_t pte_mkhuge(pte_t pte)
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pte_val(pte) |= _PAGE_HUGE;
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return pte;
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}
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#endif /* _PAGE_HUGE */
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#endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
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#endif
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static inline int pte_special(pte_t pte) { return 0; }
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static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
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