3 files changed, 35 insertions, 5 deletions

diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index 17139daeaff..c93a966b7e4 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -165,15 +165,15 @@ void invalidate_tlbcam_entry(int index)
 void __init cam_mapin_ram(unsigned long cam0, unsigned long cam1,
 		unsigned long cam2)
 {
-	settlbcam(0, KERNELBASE, PPC_MEMSTART, cam0, _PAGE_KERNEL, 0);
+	settlbcam(0, PAGE_OFFSET, PPC_MEMSTART, cam0, _PAGE_KERNEL, 0);
 	tlbcam_index++;
 	if (cam1) {
 		tlbcam_index++;
-		settlbcam(1, KERNELBASE+cam0, PPC_MEMSTART+cam0, cam1, _PAGE_KERNEL, 0);
+		settlbcam(1, PAGE_OFFSET+cam0, PPC_MEMSTART+cam0, cam1, _PAGE_KERNEL, 0);
 	}
 	if (cam2) {
 		tlbcam_index++;
-		settlbcam(2, KERNELBASE+cam0+cam1, PPC_MEMSTART+cam0+cam1, cam2, _PAGE_KERNEL, 0);
+		settlbcam(2, PAGE_OFFSET+cam0+cam1, PPC_MEMSTART+cam0+cam1, cam2, _PAGE_KERNEL, 0);
 	}
 }
 
diff --git a/arch/powerpc/mm/lmb.c b/arch/powerpc/mm/lmb.c
index 8f4d2dc4caf..4ce23bcf8a5 100644
--- a/arch/powerpc/mm/lmb.c
+++ b/arch/powerpc/mm/lmb.c
@@ -342,3 +342,16 @@ void __init lmb_enforce_memory_limit(unsigned long memory_limit)
 		}
 	}
 }
+
+int __init lmb_is_reserved(unsigned long addr)
+{
+	int i;
+
+	for (i = 0; i < lmb.reserved.cnt; i++) {
+		unsigned long upper = lmb.reserved.region[i].base +
+				      lmb.reserved.region[i].size - 1;
+		if ((addr >= lmb.reserved.region[i].base) && (addr <= upper))
+			return 1;
+	}
+	return 0;
+}
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 5402fb6b3aa..e8122447f01 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -213,15 +213,30 @@ void __init do_init_bootmem(void)
 	 */
 #ifdef CONFIG_HIGHMEM
 	free_bootmem_with_active_regions(0, total_lowmem >> PAGE_SHIFT);
+
+	/* reserve the sections we're already using */
+	for (i = 0; i < lmb.reserved.cnt; i++) {
+		unsigned long addr = lmb.reserved.region[i].base +
+				     lmb_size_bytes(&lmb.reserved, i) - 1;
+		if (addr < total_lowmem)
+			reserve_bootmem(lmb.reserved.region[i].base,
+					lmb_size_bytes(&lmb.reserved, i));
+		else if (lmb.reserved.region[i].base < total_lowmem) {
+			unsigned long adjusted_size = total_lowmem -
+				      lmb.reserved.region[i].base;
+			reserve_bootmem(lmb.reserved.region[i].base,
+					adjusted_size);
+		}
+	}
 #else
 	free_bootmem_with_active_regions(0, max_pfn);
-#endif
 
 	/* reserve the sections we're already using */
 	for (i = 0; i < lmb.reserved.cnt; i++)
 		reserve_bootmem(lmb.reserved.region[i].base,
 				lmb_size_bytes(&lmb.reserved, i));
 
+#endif
 	/* XXX need to clip this if using highmem? */
 	sparse_memory_present_with_active_regions(0);
 
@@ -334,11 +349,13 @@ void __init mem_init(void)
 		highmem_mapnr = total_lowmem >> PAGE_SHIFT;
 		for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {
 			struct page *page = pfn_to_page(pfn);
-
+			if (lmb_is_reserved(pfn << PAGE_SHIFT))
+				continue;
 			ClearPageReserved(page);
 			init_page_count(page);
 			__free_page(page);
 			totalhigh_pages++;
+			reservedpages--;
 		}
 		totalram_pages += totalhigh_pages;
 		printk(KERN_DEBUG "High memory: %luk\n",