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-rw-r--r--arch/arm/mm/proc-macros.S51
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
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+++ b/arch/arm/mm/proc-macros.S
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+/*
+ * 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