Merge tag 'lsk-v3.10-15.04-android'

[firefly-linux-kernel-4.4.55.git] / arch / arm / mm / proc-v7-3level.S

diff --git a/arch/arm/mm/proc-v7-3level.S b/arch/arm/mm/proc-v7-3level.S
index 6ba4bd9118f28163a0d4d0b36686f403f47f8d45..110e738bc970f7288d9df72b3d62995fd67b0895 100644 (file)
--- a/arch/arm/mm/proc-v7-3level.S
+++ b/arch/arm/mm/proc-v7-3level.S
@@ -56,6 +56,14 @@ ENTRY(cpu_v7_switch_mm)
        mov     pc, lr
 ENDPROC(cpu_v7_switch_mm)
 
+#ifdef __ARMEB__
+#define rl r3
+#define rh r2
+#else
+#define rl r2
+#define rh r3
+#endif
+
 /*
  * cpu_v7_set_pte_ext(ptep, pte)
  *
@@ -65,13 +73,18 @@ ENDPROC(cpu_v7_switch_mm)
  */
 ENTRY(cpu_v7_set_pte_ext)
 #ifdef CONFIG_MMU
-       tst     r2, #L_PTE_VALID
+       tst     rl, #L_PTE_VALID
        beq     1f
-       tst     r3, #1 << (57 - 32)             @ L_PTE_NONE
-       bicne   r2, #L_PTE_VALID
+       tst     rh, #1 << (57 - 32)             @ L_PTE_NONE
+       bicne   rl, #L_PTE_VALID
        bne     1f
-       tst     r3, #1 << (55 - 32)             @ L_PTE_DIRTY
-       orreq   r2, #L_PTE_RDONLY
+
+       eor     ip, rh, #1 << (55 - 32) @ toggle L_PTE_DIRTY in temp reg to
+                                       @ test for !L_PTE_DIRTY || L_PTE_RDONLY
+       tst     ip, #1 << (55 - 32) | 1 << (58 - 32)
+       orrne   rl, #PTE_AP2
+       biceq   rl, #PTE_AP2
+
 1:     strd    r2, r3, [r0]
        ALT_SMP(W(nop))
        ALT_UP (mcr     p15, 0, r0, c7, c10, 1)         @ flush_pte