1 files changed, 22 insertions, 0 deletions

diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c
index 69b24ad26139..e6c207ef4552 100644
--- a/sys/powerpc/booke/pmap.c
+++ b/sys/powerpc/booke/pmap.c
@@ -382,6 +382,8 @@ static int		mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr,
     vm_size_t sz, vm_memattr_t mode);
 static int		mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm,
     volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen);
+static int		mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr,
+    int *is_user, vm_offset_t *decoded_addr);
 
 
 static mmu_method_t mmu_booke_methods[] = {
@@ -436,6 +438,7 @@ static mmu_method_t mmu_booke_methods[] = {
 	MMUMETHOD(mmu_unmapdev,		mmu_booke_unmapdev),
 	MMUMETHOD(mmu_change_attr,	mmu_booke_change_attr),
 	MMUMETHOD(mmu_map_user_ptr,	mmu_booke_map_user_ptr),
+	MMUMETHOD(mmu_decode_kernel_ptr, mmu_booke_decode_kernel_ptr),
 
 	/* dumpsys() support */
 	MMUMETHOD(mmu_dumpsys_map,	mmu_booke_dumpsys_map),
@@ -2292,6 +2295,25 @@ mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr,
 }
 
 /*
+ * Figure out where a given kernel pointer (usually in a fault) points
+ * to from the VM's perspective, potentially remapping into userland's
+ * address space.
+ */
+static int
+mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, int *is_user,
+    vm_offset_t *decoded_addr)
+{
+
+	if (addr < VM_MAXUSER_ADDRESS)
+		*is_user = 1;
+	else
+		*is_user = 0;
+
+	*decoded_addr = addr;
+	return (0);
+}
+
+/*
  * Initialize pmap associated with process 0.
  */
 static void