1 files changed, 49 insertions, 93 deletions

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 0dba5066c22..2c8e90f5789 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -66,10 +66,9 @@ unsigned long long memory_limit;
 
 #ifdef CONFIG_HIGHMEM
 pte_t *kmap_pte;
+EXPORT_SYMBOL(kmap_pte);
 pgprot_t kmap_prot;
-
 EXPORT_SYMBOL(kmap_prot);
-EXPORT_SYMBOL(kmap_pte);
 
 static inline pte_t *virt_to_kpte(unsigned long vaddr)
 {
@@ -133,6 +132,23 @@ int arch_add_memory(int nid, u64 start, u64 size)
 
 	return __add_pages(nid, zone, start_pfn, nr_pages);
 }
+
+#ifdef CONFIG_MEMORY_HOTREMOVE
+int arch_remove_memory(u64 start, u64 size)
+{
+	unsigned long start_pfn = start >> PAGE_SHIFT;
+	unsigned long nr_pages = size >> PAGE_SHIFT;
+	struct zone *zone;
+	int ret;
+
+	zone = page_zone(pfn_to_page(start_pfn));
+	ret = __remove_pages(zone, start_pfn, nr_pages);
+	if (!ret && (ppc_md.remove_memory))
+		ret = ppc_md.remove_memory(start, size);
+
+	return ret;
+}
+#endif
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 /*
@@ -195,13 +211,10 @@ void __init do_init_bootmem(void)
 	min_low_pfn = MEMORY_START >> PAGE_SHIFT;
 	boot_mapsize = init_bootmem_node(NODE_DATA(0), start >> PAGE_SHIFT, min_low_pfn, max_low_pfn);
 
-	/* Add active regions with valid PFNs */
-	for_each_memblock(memory, reg) {
-		unsigned long start_pfn, end_pfn;
-		start_pfn = memblock_region_memory_base_pfn(reg);
-		end_pfn = memblock_region_memory_end_pfn(reg);
-		memblock_set_node(0, (phys_addr_t)ULLONG_MAX, 0);
-	}
+	/* Place all memblock_regions in the same node and merge contiguous
+	 * memblock_regions
+	 */
+	memblock_set_node(0, (phys_addr_t)ULLONG_MAX, &memblock.memory, 0);
 
 	/* Add all physical memory to the bootmem map, mark each area
 	 * present.
@@ -289,49 +302,30 @@ void __init paging_init(void)
 }
 #endif /* ! CONFIG_NEED_MULTIPLE_NODES */
 
+static void __init register_page_bootmem_info(void)
+{
+	int i;
+
+	for_each_online_node(i)
+		register_page_bootmem_info_node(NODE_DATA(i));
+}
+
 void __init mem_init(void)
 {
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-	int nid;
-#endif
-	pg_data_t *pgdat;
-	unsigned long i;
-	struct page *page;
-	unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
+	/*
+	 * book3s is limited to 16 page sizes due to encoding this in
+	 * a 4-bit field for slices.
+	 */
+	BUILD_BUG_ON(MMU_PAGE_COUNT > 16);
 
 #ifdef CONFIG_SWIOTLB
 	swiotlb_init(0);
 #endif
 
-	num_physpages = memblock_phys_mem_size() >> PAGE_SHIFT;
+	register_page_bootmem_info();
 	high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
-
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-        for_each_online_node(nid) {
-		if (NODE_DATA(nid)->node_spanned_pages != 0) {
-			printk("freeing bootmem node %d\n", nid);
-			totalram_pages +=
-				free_all_bootmem_node(NODE_DATA(nid));
-		}
-	}
-#else
-	max_mapnr = max_pfn;
-	totalram_pages += free_all_bootmem();
-#endif
-	for_each_online_pgdat(pgdat) {
-		for (i = 0; i < pgdat->node_spanned_pages; i++) {
-			if (!pfn_valid(pgdat->node_start_pfn + i))
-				continue;
-			page = pgdat_page_nr(pgdat, i);
-			if (PageReserved(page))
-				reservedpages++;
-		}
-	}
-
-	codesize = (unsigned long)&_sdata - (unsigned long)&_stext;
-	datasize = (unsigned long)&_edata - (unsigned long)&_sdata;
-	initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
-	bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start;
+	set_max_mapnr(max_pfn);
+	free_all_bootmem();
 
 #ifdef CONFIG_HIGHMEM
 	{
@@ -341,17 +335,9 @@ void __init mem_init(void)
 		for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {
 			phys_addr_t paddr = (phys_addr_t)pfn << PAGE_SHIFT;
 			struct page *page = pfn_to_page(pfn);
-			if (memblock_is_reserved(paddr))
-				continue;
-			ClearPageReserved(page);
-			init_page_count(page);
-			__free_page(page);
-			totalhigh_pages++;
-			reservedpages--;
+			if (!memblock_is_reserved(paddr))
+				free_highmem_page(page);
 		}
-		totalram_pages += totalhigh_pages;
-		printk(KERN_DEBUG "High memory: %luk\n",
-		       totalhigh_pages << (PAGE_SHIFT-10));
 	}
 #endif /* CONFIG_HIGHMEM */
 
@@ -364,16 +350,7 @@ void __init mem_init(void)
 		(mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1;
 #endif
 
-	printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, "
-	       "%luk reserved, %luk data, %luk bss, %luk init)\n",
-		nr_free_pages() << (PAGE_SHIFT-10),
-		num_physpages << (PAGE_SHIFT-10),
-		codesize >> 10,
-		reservedpages << (PAGE_SHIFT-10),
-		datasize >> 10,
-		bsssize >> 10,
-		initsize >> 10);
-
+	mem_init_print_info(NULL);
 #ifdef CONFIG_PPC32
 	pr_info("Kernel virtual memory layout:\n");
 	pr_info("  * 0x%08lx..0x%08lx  : fixmap\n", FIXADDR_START, FIXADDR_TOP);
@@ -396,39 +373,14 @@ void __init mem_init(void)
 
 void free_initmem(void)
 {
-	unsigned long addr;
-
 	ppc_md.progress = ppc_printk_progress;
-
-	addr = (unsigned long)__init_begin;
-	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
-		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		totalram_pages++;
-	}
-	pr_info("Freeing unused kernel memory: %luk freed\n",
-		((unsigned long)__init_end -
-		(unsigned long)__init_begin) >> 10);
+	free_initmem_default(POISON_FREE_INITMEM);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	if (start >= end)
-		return;
-
-	start = _ALIGN_DOWN(start, PAGE_SIZE);
-	end = _ALIGN_UP(end, PAGE_SIZE);
-	pr_info("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
-
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		totalram_pages++;
-	}
+	free_reserved_area((void *)start, (void *)end, -1, "initrd");
 }
 #endif
 
@@ -529,6 +481,10 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
 		      pte_t *ptep)
 {
 #ifdef CONFIG_PPC_STD_MMU
+	/*
+	 * We don't need to worry about _PAGE_PRESENT here because we are
+	 * called with either mm->page_table_lock held or ptl lock held
+	 */
 	unsigned long access = 0, trap;
 
 	/* We only want HPTEs for linux PTEs that have _PAGE_ACCESSED set */
@@ -562,7 +518,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
  * System memory should not be in /proc/iomem but various tools expect it
  * (eg kdump).
  */
-static int add_system_ram_resources(void)
+static int __init add_system_ram_resources(void)
 {
 	struct memblock_region *reg;
 
@@ -578,7 +534,7 @@ static int add_system_ram_resources(void)
 			res->name = "System RAM";
 			res->start = base;
 			res->end = base + size - 1;
-			res->flags = IORESOURCE_MEM;
+			res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
 			WARN_ON(request_resource(&iomem_resource, res) < 0);
 		}
 	}