7 files changed, 58 insertions, 14 deletions

diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c
index f5e7b9ce63dd..08dfa8e6d86f 100644
--- a/arch/powerpc/mm/40x_mmu.c
+++ b/arch/powerpc/mm/40x_mmu.c
@@ -91,7 +91,7 @@ void __init MMU_init_hw(void)
 #define LARGE_PAGE_SIZE_16M     (1<<24)
 #define LARGE_PAGE_SIZE_4M      (1<<22)
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
         unsigned long v, s, mapped;
         phys_addr_t p;
diff --git a/arch/powerpc/mm/44x_mmu.c b/arch/powerpc/mm/44x_mmu.c
index 98052ac96580..3986264b0993 100644
--- a/arch/powerpc/mm/44x_mmu.c
+++ b/arch/powerpc/mm/44x_mmu.c
@@ -88,7 +88,7 @@ void __init MMU_init_hw(void)
         flush_instruction_cache();
 }
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
         unsigned long addr;
 
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index fcfcb6e976c7..c5394728bf2e 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -207,7 +207,7 @@ unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx)
         return amount_mapped;
 }
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
         return tlbcam_addrs[tlbcam_index - 1].limit - PAGE_OFFSET + 1;
 }
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 9ddcfb4dc139..4ec900af332f 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -82,6 +82,11 @@ extern struct task_struct *current_set[NR_CPUS];
 int __map_without_bats;
 int __map_without_ltlbs;
 
+/*
+ * This tells the system to allow ioremapping memory marked as reserved.
+ */
+int __allow_ioremap_reserved;
+
 /* max amount of low RAM to map in */
 unsigned long __max_low_memory = MAX_LOW_MEM;
 
@@ -131,9 +136,13 @@ void __init MMU_init(void)
         MMU_setup();
 
         if (lmb.memory.cnt > 1) {
+#ifndef CONFIG_WII
                 lmb.memory.cnt = 1;
                 lmb_analyze();
                 printk(KERN_WARNING "Only using first contiguous memory region");
+#else
+                wii_memory_fixups();
+#endif
         }
 
         total_lowmem = total_memory = lmb_end_of_DRAM() - memstart_addr;
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index e27a990af42d..d49a77503e19 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -104,6 +104,7 @@ extern void setbat(int index, unsigned long virt, phys_addr_t phys,
                    unsigned int size, int flags);
 
 extern int __map_without_bats;
+extern int __allow_ioremap_reserved;
 extern unsigned long ioremap_base;
 extern unsigned int rtas_data, rtas_size;
 
@@ -125,24 +126,32 @@ extern phys_addr_t total_lowmem;
 extern phys_addr_t memstart_addr;
 extern phys_addr_t lowmem_end_addr;
 
+#ifdef CONFIG_WII
+extern unsigned long wii_hole_start;
+extern unsigned long wii_hole_size;
+
+extern unsigned long wii_mmu_mapin_mem2(unsigned long top);
+extern void wii_memory_fixups(void);
+#endif
+
 /* ...and now those things that may be slightly different between processor
  * architectures.  -- Dan
  */
 #if defined(CONFIG_8xx)
 #define MMU_init_hw()           do { } while(0)
-#define mmu_mapin_ram()         (0UL)
+#define mmu_mapin_ram(top)      (0UL)
 
 #elif defined(CONFIG_4xx)
 extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
 
 #elif defined(CONFIG_FSL_BOOKE)
 extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
 extern void adjust_total_lowmem(void);
 
 #elif defined(CONFIG_PPC32)
 /* anything 32-bit except 4xx or 8xx */
 extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
 #endif
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
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 2d2a87e10154..f11c2cdcb0fe 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -72,7 +72,7 @@ unsigned long p_mapped_by_bats(phys_addr_t pa)
         return 0;
 }
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
         unsigned long tot, bl, done;
         unsigned long max_size = (256<<20);
@@ -86,7 +86,7 @@ unsigned long __init mmu_mapin_ram(void)
 
         /* Make sure we don't map a block larger than the
            smallest alignment of the physical address. */
-        tot = total_lowmem;
+        tot = top;
         for (bl = 128<<10; bl < max_size; bl <<= 1) {
                 if (bl * 2 > tot)
                         break;