Merge Linus' tree to be be to apply submitted patches to newer code than

current trivial.git base

1 files changed, 40 insertions, 5 deletions

diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 539ddd148bb..d6d1928539b 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -97,6 +97,34 @@ extern void paging_init(void);
 
 #define pmd_page_vaddr(pmd)	pmd_val(pmd)
 
+#define htw_stop()							\
+do {									\
+	if (cpu_has_htw)						\
+		write_c0_pwctl(read_c0_pwctl() &			\
+			       ~(1 << MIPS_PWCTL_PWEN_SHIFT));		\
+} while(0)
+
+#define htw_start()							\
+do {									\
+	if (cpu_has_htw)						\
+		write_c0_pwctl(read_c0_pwctl() |			\
+			       (1 << MIPS_PWCTL_PWEN_SHIFT));		\
+} while(0)
+
+
+#define htw_reset()							\
+do {									\
+	if (cpu_has_htw) {						\
+		htw_stop();						\
+		back_to_back_c0_hazard();				\
+		htw_start();						\
+		back_to_back_c0_hazard();				\
+	}								\
+} while(0)
+
+extern void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
+	pte_t pteval);
+
 #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
 
 #define pte_none(pte)		(!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL))
@@ -120,7 +148,6 @@ static inline void set_pte(pte_t *ptep, pte_t pte)
 		}
 	}
 }
-#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
 
 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
@@ -131,6 +158,7 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
 		null.pte_low = null.pte_high = _PAGE_GLOBAL;
 
 	set_pte_at(mm, addr, ptep, null);
+	htw_reset();
 }
 #else
 
@@ -157,7 +185,6 @@ static inline void set_pte(pte_t *ptep, pte_t pteval)
 	}
 #endif
 }
-#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
 
 static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
@@ -168,6 +195,7 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
 	else
 #endif
 		set_pte_at(mm, addr, ptep, __pte(0));
+	htw_reset();
 }
 #endif
 
@@ -338,6 +366,16 @@ static inline pgprot_t pgprot_noncached(pgprot_t _prot)
 	return __pgprot(prot);
 }
 
+static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
+{
+	unsigned long prot = pgprot_val(_prot);
+
+	/* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */
+	prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine;
+
+	return __pgprot(prot);
+}
+
 /*
  * Conversion functions: convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.
@@ -363,15 +401,12 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 
 extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
 	pte_t pte);
-extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
-	pte_t pte);
 
 static inline void update_mmu_cache(struct vm_area_struct *vma,
 	unsigned long address, pte_t *ptep)
 {
 	pte_t pte = *ptep;
 	__update_tlb(vma, address, pte);
-	__update_cache(vma, address, pte);
 }
 
 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,