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Diffstat (limited to 'arch/mips/include/asm/pgtable.h')
-rw-r--r--arch/mips/include/asm/pgtable.h27
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 539ddd148bbb..027c74db13f9 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -97,6 +97,31 @@ 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)
+
#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
#define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL))
@@ -131,6 +156,7 @@ 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
@@ -168,6 +194,7 @@ 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