2 files changed, 35 insertions, 16 deletions

diff --git a/arch/powerpc/boot/devtree.c b/arch/powerpc/boot/devtree.c
index ac4b5ee92d58..c9951550ed2c 100644
--- a/arch/powerpc/boot/devtree.c
+++ b/arch/powerpc/boot/devtree.c
@@ -207,12 +207,13 @@ static int find_range(u32 *reg, u32 *ranges, int nregaddr,
  * In particular, PCI is not supported.  Also, only the beginning of the
  * reg block is tracked; size is ignored except in ranges.
  */
-int dt_xlate_reg(void *node, int res, unsigned long *addr,
-                 unsigned long *size)
+static u32 dt_xlate_buf[MAX_ADDR_CELLS * MAX_RANGES * 3];
+
+static int dt_xlate(void *node, int res, int reglen, unsigned long *addr,
+                unsigned long *size)
 {
         u32 last_addr[MAX_ADDR_CELLS];
         u32 this_addr[MAX_ADDR_CELLS];
-        u32 buf[MAX_ADDR_CELLS * MAX_RANGES * 3];
         void *parent;
         u64 ret_addr, ret_size;
         u32 naddr, nsize, prev_naddr;
@@ -227,19 +228,18 @@ int dt_xlate_reg(void *node, int res, unsigned long *addr,
         if (nsize > 2)
                 return 0;
 
-        buflen = getprop(node, "reg", buf, sizeof(buf)) / 4;
         offset = (naddr + nsize) * res;
 
-        if (buflen < offset + naddr + nsize ||
-            sizeof(buf) < offset + naddr + nsize)
+        if (reglen < offset + naddr + nsize ||
+            sizeof(dt_xlate_buf) < offset + naddr + nsize)
                 return 0;
 
-        copy_val(last_addr, buf + offset, naddr);
+        copy_val(last_addr, dt_xlate_buf + offset, naddr);
 
-        ret_size = buf[offset + naddr];
+        ret_size = dt_xlate_buf[offset + naddr];
         if (nsize == 2) {
                 ret_size <<= 32;
-                ret_size |= buf[offset + naddr + 1];
+                ret_size |= dt_xlate_buf[offset + naddr + 1];
         }
 
         while ((node = get_parent(node))) {
@@ -247,24 +247,25 @@ int dt_xlate_reg(void *node, int res, unsigned long *addr,
 
                 get_reg_format(node, &naddr, &nsize);
 
-                buflen = getprop(node, "ranges", buf, sizeof(buf));
+                buflen = getprop(node, "ranges", dt_xlate_buf,
+                                sizeof(dt_xlate_buf));
                 if (buflen < 0)
                         continue;
-                if (buflen > sizeof(buf))
+                if (buflen > sizeof(dt_xlate_buf))
                         return 0;
 
-                offset = find_range(last_addr, buf, prev_naddr,
+                offset = find_range(last_addr, dt_xlate_buf, prev_naddr,
                                     naddr, nsize, buflen / 4);
 
                 if (offset < 0)
                         return 0;
 
-                copy_val(this_addr, buf + offset, prev_naddr);
+                copy_val(this_addr, dt_xlate_buf + offset, prev_naddr);
 
                 if (!sub_reg(last_addr, this_addr))
                         return 0;
 
-                copy_val(this_addr, buf + offset + prev_naddr, naddr);
+                copy_val(this_addr, dt_xlate_buf + offset + prev_naddr, naddr);
 
                 if (!add_reg(last_addr, this_addr, naddr))
                         return 0;
@@ -286,3 +287,21 @@ int dt_xlate_reg(void *node, int res, unsigned long *addr,
 
         return 1;
 }
+
+int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size)
+{
+        int reglen;
+
+        reglen = getprop(node, "reg", dt_xlate_buf, sizeof(dt_xlate_buf)) / 4;
+        return dt_xlate(node, res, reglen, addr, size);
+}
+
+int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr)
+{
+
+        if (buflen > sizeof(dt_xlate_buf))
+                return 0;
+
+        memcpy(dt_xlate_buf, buf, buflen);
+        return dt_xlate(node, 0, buflen / 4, xlated_addr, NULL);
+}
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index 20e87199f6a4..73bd47a3a079 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -82,8 +82,8 @@ int ns16550_console_init(void *devp, struct serial_console_data *scdp);
 void *simple_alloc_init(char *base, unsigned long heap_size,
                         unsigned long granularity, unsigned long max_allocs);
 extern void flush_cache(void *, unsigned long);
-int dt_xlate_reg(void *node, int res, unsigned long *addr,
-                 unsigned long *size);
+int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
+int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
 
 static inline void *finddevice(const char *name)
 {