[ARM] 4129/1: Add barriers after the TLB operations

[linux-2.6-omap-h63xx.git] / include / asm-arm / tlbflush.h

diff --git a/include/asm-arm/tlbflush.h b/include/asm-arm/tlbflush.h
index cd10a0b5f8ae77510234c15c9295f80944f59f4a..08c6991dc9c9925a36e5057047fdf3956639078f 100644 (file)
--- a/include/asm-arm/tlbflush.h
+++ b/include/asm-arm/tlbflush.h
@@ -247,7 +247,7 @@ static inline void local_flush_tlb_all(void)
        const unsigned int __tlb_flag = __cpu_tlb_flags;
 
        if (tlb_flag(TLB_WB))
-               asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (zero) : "cc");
+               dsb();
 
        if (tlb_flag(TLB_V3_FULL))
                asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (zero) : "cc");
@@ -257,6 +257,15 @@ static inline void local_flush_tlb_all(void)
                asm("mcr p15, 0, %0, c8, c6, 0" : : "r" (zero) : "cc");
        if (tlb_flag(TLB_V4_I_FULL | TLB_V6_I_FULL))
                asm("mcr p15, 0, %0, c8, c5, 0" : : "r" (zero) : "cc");
+
+       if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL |
+                    TLB_V6_I_PAGE | TLB_V6_D_PAGE |
+                    TLB_V6_I_ASID | TLB_V6_D_ASID)) {
+               /* flush the branch target cache */
+               asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
+               dsb();
+               isb();
+       }
 }
 
 static inline void local_flush_tlb_mm(struct mm_struct *mm)
@@ -266,7 +275,7 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm)
        const unsigned int __tlb_flag = __cpu_tlb_flags;
 
        if (tlb_flag(TLB_WB))
-               asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (zero) : "cc");
+               dsb();
 
        if (cpu_isset(smp_processor_id(), mm->cpu_vm_mask)) {
                if (tlb_flag(TLB_V3_FULL))
@@ -285,6 +294,14 @@ static inline void local_flush_tlb_mm(struct mm_struct *mm)
                asm("mcr p15, 0, %0, c8, c6, 2" : : "r" (asid) : "cc");
        if (tlb_flag(TLB_V6_I_ASID))
                asm("mcr p15, 0, %0, c8, c5, 2" : : "r" (asid) : "cc");
+
+       if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL |
+                    TLB_V6_I_PAGE | TLB_V6_D_PAGE |
+                    TLB_V6_I_ASID | TLB_V6_D_ASID)) {
+               /* flush the branch target cache */
+               asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
+               dsb();
+       }
 }
 
 static inline void
@@ -296,7 +313,7 @@ local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
        uaddr = (uaddr & PAGE_MASK) | ASID(vma->vm_mm);
 
        if (tlb_flag(TLB_WB))
-               asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (zero));
+               dsb();
 
        if (cpu_isset(smp_processor_id(), vma->vm_mm->cpu_vm_mask)) {
                if (tlb_flag(TLB_V3_PAGE))
@@ -317,6 +334,14 @@ local_flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
                asm("mcr p15, 0, %0, c8, c6, 1" : : "r" (uaddr) : "cc");
        if (tlb_flag(TLB_V6_I_PAGE))
                asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (uaddr) : "cc");
+
+       if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL |
+                    TLB_V6_I_PAGE | TLB_V6_D_PAGE |
+                    TLB_V6_I_ASID | TLB_V6_D_ASID)) {
+               /* flush the branch target cache */
+               asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
+               dsb();
+       }
 }
 
 static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
@@ -327,7 +352,7 @@ static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
        kaddr &= PAGE_MASK;
 
        if (tlb_flag(TLB_WB))
-               asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (zero) : "cc");
+               dsb();
 
        if (tlb_flag(TLB_V3_PAGE))
                asm("mcr p15, 0, %0, c6, c0, 0" : : "r" (kaddr) : "cc");
@@ -347,11 +372,14 @@ static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
        if (tlb_flag(TLB_V6_I_PAGE))
                asm("mcr p15, 0, %0, c8, c5, 1" : : "r" (kaddr) : "cc");
 
-       /* The ARM ARM states that the completion of a TLB maintenance
-        * operation is only guaranteed by a DSB instruction
-        */
-       if (tlb_flag(TLB_V6_U_PAGE | TLB_V6_D_PAGE | TLB_V6_I_PAGE))
-               asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (zero) : "cc");
+       if (tlb_flag(TLB_V6_I_FULL | TLB_V6_D_FULL |
+                    TLB_V6_I_PAGE | TLB_V6_D_PAGE |
+                    TLB_V6_I_ASID | TLB_V6_D_ASID)) {
+               /* flush the branch target cache */
+               asm("mcr p15, 0, %0, c7, c5, 6" : : "r" (zero) : "cc");
+               dsb();
+               isb();
+       }
 }
 
 /*
@@ -369,15 +397,13 @@ static inline void local_flush_tlb_kernel_page(unsigned long kaddr)
  */
 static inline void flush_pmd_entry(pmd_t *pmd)
 {
-       const unsigned int zero = 0;
        const unsigned int __tlb_flag = __cpu_tlb_flags;
 
        if (tlb_flag(TLB_DCLEAN))
                asm("mcr        p15, 0, %0, c7, c10, 1  @ flush_pmd"
                        : : "r" (pmd) : "cc");
        if (tlb_flag(TLB_WB))
-               asm("mcr        p15, 0, %0, c7, c10, 4  @ flush_pmd"
-                       : : "r" (zero) : "cc");
+               dsb();
 }
 
 static inline void clean_pmd_entry(pmd_t *pmd)