1 files changed, 31 insertions, 5 deletions

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index cb96cb2e17cc..177e4038b43c 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -26,6 +26,7 @@
 #include <linux/vmalloc.h>
 #include <linux/init.h>
 #include <linux/highmem.h>
+#include <linux/lmb.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -191,7 +192,8 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
          * Don't allow anybody to remap normal RAM that we're using.
          * mem_init() sets high_memory so only do the check after that.
          */
-        if (mem_init_done && (p < virt_to_phys(high_memory))) {
+        if (mem_init_done && (p < virt_to_phys(high_memory)) &&
+            !(__allow_ioremap_reserved && lmb_is_region_reserved(p, size))) {
                 printk("__ioremap(): phys addr 0x%llx is RAM lr %p\n",
                        (unsigned long long)p, __builtin_return_address(0));
                 return NULL;
@@ -283,18 +285,18 @@ int map_page(unsigned long va, phys_addr_t pa, int flags)
 }
 
 /*
- * Map in a big chunk of physical memory starting at PAGE_OFFSET.
+ * Map in a chunk of physical memory starting at start.
  */
-void __init mapin_ram(void)
+void __init __mapin_ram_chunk(unsigned long offset, unsigned long top)
 {
         unsigned long v, s, f;
         phys_addr_t p;
         int ktext;
 
-        s = mmu_mapin_ram();
+        s = offset;
         v = PAGE_OFFSET + s;
         p = memstart_addr + s;
-        for (; s < total_lowmem; s += PAGE_SIZE) {
+        for (; s < top; s += PAGE_SIZE) {
                 ktext = ((char *) v >= _stext && (char *) v < etext);
                 f = ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL;
                 map_page(v, p, f);
@@ -307,6 +309,30 @@ void __init mapin_ram(void)
         }
 }
 
+void __init mapin_ram(void)
+{
+        unsigned long s, top;
+
+#ifndef CONFIG_WII
+        top = total_lowmem;
+        s = mmu_mapin_ram(top);
+        __mapin_ram_chunk(s, top);
+#else
+        if (!wii_hole_size) {
+                s = mmu_mapin_ram(total_lowmem);
+                __mapin_ram_chunk(s, total_lowmem);
+        } else {
+                top = wii_hole_start;
+                s = mmu_mapin_ram(top);
+                __mapin_ram_chunk(s, top);
+
+                top = lmb_end_of_DRAM();
+                s = wii_mmu_mapin_mem2(top);
+                __mapin_ram_chunk(s, top);
+        }
+#endif
+}
+
 /* Scan the real Linux page tables and return a PTE pointer for
  * a virtual address in a context.
  * Returns true (1) if PTE was found, zero otherwise.  The pointer to