1 files changed, 51 insertions, 0 deletions

diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S
new file mode 100644
index 000000000000..9137fe563599
--- /dev/null
+++ b/arch/arm/mm/proc-macros.S
@@ -0,0 +1,51 @@
+/*
+ * We need constants.h for:
+ *  VMA_VM_MM
+ *  VMA_VM_FLAGS
+ *  VM_EXEC
+ */
+#include <asm/constants.h>
+#include <asm/thread_info.h>
+
+/*
+ * vma_vm_mm - get mm pointer from vma pointer (vma->vm_mm)
+ */
+        .macro  vma_vm_mm, rd, rn
+        ldr     \rd, [\rn, #VMA_VM_MM]
+        .endm
+
+/*
+ * vma_vm_flags - get vma->vm_flags
+ */
+        .macro  vma_vm_flags, rd, rn
+        ldr     \rd, [\rn, #VMA_VM_FLAGS]
+        .endm
+
+        .macro  tsk_mm, rd, rn
+        ldr     \rd, [\rn, #TI_TASK]
+        ldr     \rd, [\rd, #TSK_ACTIVE_MM]
+        .endm
+
+/*
+ * act_mm - get current->active_mm
+ */
+        .macro  act_mm, rd
+        bic     \rd, sp, #8128
+        bic     \rd, \rd, #63
+        ldr     \rd, [\rd, #TI_TASK]
+        ldr     \rd, [\rd, #TSK_ACTIVE_MM]
+        .endm
+
+/*
+ * mmid - get context id from mm pointer (mm->context.id)
+ */
+        .macro  mmid, rd, rn
+        ldr     \rd, [\rn, #MM_CONTEXT_ID]
+        .endm
+
+/*
+ * mask_asid - mask the ASID from the context ID
+ */
+        .macro  asid, rd, rn
+        and     \rd, \rn, #255
+        .endm