static noinline int do_test_wp_bit(void);
-static unsigned long __initdata table_start;
-static unsigned long __meminitdata table_end;
-static unsigned long __meminitdata table_top;
-
-static int __initdata after_init_bootmem;
+extern unsigned long __initdata table_start;
+extern unsigned long __meminitdata table_end;
+extern unsigned long __meminitdata table_top;
static __init void *alloc_low_page(void)
{
#ifdef CONFIG_X86_PAE
if (!(pgd_val(*pgd) & _PAGE_PRESENT)) {
- if (after_init_bootmem)
+ if (after_bootmem)
pmd_table = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
else
pmd_table = (pmd_t *)alloc_low_page();
if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
pte_t *page_table = NULL;
- if (after_init_bootmem) {
+ if (after_bootmem) {
#ifdef CONFIG_DEBUG_PAGEALLOC
page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
#endif
pte_t *newpte;
int i;
- BUG_ON(after_init_bootmem);
+ BUG_ON(after_bootmem);
newpte = alloc_low_page();
for (i = 0; i < PTRS_PER_PTE; i++)
set_pte(newpte + i, pte[i]);
* of max_low_pfn pages, by creating page tables starting from address
* PAGE_OFFSET:
*/
-static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
- unsigned long start_pfn,
- unsigned long end_pfn,
- int use_pse)
+void __init kernel_physical_mapping_init(unsigned long start_pfn,
+ unsigned long end_pfn,
+ int use_pse)
{
+ pgd_t *pgd_base = swapper_pg_dir;
int pgd_idx, pmd_idx, pte_ofs;
unsigned long pfn;
pgd_t *pgd;
}
}
-/*
- * devmem_is_allowed() checks to see if /dev/mem access to a certain address
- * is valid. The argument is a physical page number.
- *
- *
- * On x86, access has to be given to the first megabyte of ram because that area
- * contains bios code and data regions used by X and dosemu and similar apps.
- * Access has to be given to non-kernel-ram areas as well, these contain the PCI
- * mmio resources as well as potential bios/acpi data regions.
- */
-int devmem_is_allowed(unsigned long pagenr)
-{
- if (pagenr <= 256)
- return 1;
- if (iomem_is_exclusive(pagenr << PAGE_SHIFT))
- return 0;
- if (!page_is_ram(pagenr))
- return 1;
- return 0;
-}
-
pte_t *kmap_pte;
pgprot_t kmap_prot;
work_with_active_regions(nid, add_highpages_work_fn, &data);
}
-#ifndef CONFIG_NUMA
-static void __init set_highmem_pages_init(void)
-{
- add_highpages_with_active_regions(0, highstart_pfn, highend_pfn);
-
- totalram_pages += totalhigh_pages;
-}
-#endif /* !CONFIG_NUMA */
-
#else
static inline void permanent_kmaps_init(pgd_t *pgd_base)
{
}
-static inline void set_highmem_pages_init(void)
-{
-}
#endif /* CONFIG_HIGHMEM */
void __init native_pagetable_setup_start(pgd_t *base)
* be partially populated, and so it avoids stomping on any existing
* mappings.
*/
-static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
+void __init early_ioremap_page_table_range_init(void)
{
+ pgd_t *pgd_base = swapper_pg_dir;
unsigned long vaddr, end;
/*
free_area_init_nodes(max_zone_pfns);
}
+static unsigned long __init setup_node_bootmem(int nodeid,
+ unsigned long start_pfn,
+ unsigned long end_pfn,
+ unsigned long bootmap)
+{
+ unsigned long bootmap_size;
+
+ if (start_pfn > max_low_pfn)
+ return bootmap;
+ if (end_pfn > max_low_pfn)
+ end_pfn = max_low_pfn;
+
+ /* don't touch min_low_pfn */
+ bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
+ bootmap >> PAGE_SHIFT,
+ start_pfn, end_pfn);
+ printk(KERN_INFO " node %d low ram: %08lx - %08lx\n",
+ nodeid, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
+ printk(KERN_INFO " node %d bootmap %08lx - %08lx\n",
+ nodeid, bootmap, bootmap + bootmap_size);
+ free_bootmem_with_active_regions(nodeid, end_pfn);
+ early_res_to_bootmem(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
+
+ return bootmap + bootmap_size;
+}
+
void __init setup_bootmem_allocator(void)
{
- int i;
+ int nodeid;
unsigned long bootmap_size, bootmap;
/*
* Initialize the boot-time allocator (with low memory only):
*/
bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
- bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
- max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
+ bootmap = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
PAGE_SIZE);
if (bootmap == -1L)
panic("Cannot find bootmem map of size %ld\n", bootmap_size);
reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");
- /* don't touch min_low_pfn */
- bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
- min_low_pfn, max_low_pfn);
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
- printk(KERN_INFO " low ram: %08lx - %08lx\n",
- min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
- printk(KERN_INFO " bootmap %08lx - %08lx\n",
- bootmap, bootmap + bootmap_size);
- for_each_online_node(i)
- free_bootmem_with_active_regions(i, max_low_pfn);
- early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
-
- after_init_bootmem = 1;
-}
-
-static void __init find_early_table_space(unsigned long end, int use_pse)
-{
- unsigned long puds, pmds, ptes, tables, start;
-
- puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
- tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
-
- pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
- tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
-
- if (use_pse) {
- unsigned long extra;
-
- extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
- extra += PMD_SIZE;
- ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
- } else
- ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
-
- tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
-
- /* for fixmap */
- tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
+ printk(KERN_INFO " low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);
- /*
- * RED-PEN putting page tables only on node 0 could
- * cause a hotspot and fill up ZONE_DMA. The page tables
- * need roughly 0.5KB per GB.
- */
- start = 0x7000;
- table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
- tables, PAGE_SIZE);
- if (table_start == -1UL)
- panic("Cannot find space for the kernel page tables");
-
- table_start >>= PAGE_SHIFT;
- table_end = table_start;
- table_top = table_start + (tables>>PAGE_SHIFT);
-
- printk(KERN_DEBUG "kernel direct mapping tables up to %lx @ %lx-%lx\n",
- end, table_start << PAGE_SHIFT,
- (table_start << PAGE_SHIFT) + tables);
-}
-
-unsigned long __init_refok init_memory_mapping(unsigned long start,
- unsigned long end)
-{
- pgd_t *pgd_base = swapper_pg_dir;
- unsigned long start_pfn, end_pfn;
- unsigned long big_page_start;
-#ifdef CONFIG_DEBUG_PAGEALLOC
- /*
- * For CONFIG_DEBUG_PAGEALLOC, identity mapping will use small pages.
- * This will simplify cpa(), which otherwise needs to support splitting
- * large pages into small in interrupt context, etc.
- */
- int use_pse = 0;
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+ for_each_online_node(nodeid)
+ bootmap = setup_node_bootmem(nodeid, node_start_pfn[nodeid],
+ node_end_pfn[nodeid], bootmap);
#else
- int use_pse = cpu_has_pse;
+ bootmap = setup_node_bootmem(0, 0, max_low_pfn, bootmap);
#endif
- /*
- * Find space for the kernel direct mapping tables.
- */
- if (!after_init_bootmem)
- find_early_table_space(end, use_pse);
-
-#ifdef CONFIG_X86_PAE
- set_nx();
- if (nx_enabled)
- printk(KERN_INFO "NX (Execute Disable) protection: active\n");
-#endif
-
- /* Enable PSE if available */
- if (cpu_has_pse)
- set_in_cr4(X86_CR4_PSE);
-
- /* Enable PGE if available */
- if (cpu_has_pge) {
- set_in_cr4(X86_CR4_PGE);
- __supported_pte_mask |= _PAGE_GLOBAL;
- }
-
- /*
- * Don't use a large page for the first 2/4MB of memory
- * because there are often fixed size MTRRs in there
- * and overlapping MTRRs into large pages can cause
- * slowdowns.
- */
- big_page_start = PMD_SIZE;
-
- if (start < big_page_start) {
- start_pfn = start >> PAGE_SHIFT;
- end_pfn = min(big_page_start>>PAGE_SHIFT, end>>PAGE_SHIFT);
- } else {
- /* head is not big page alignment ? */
- start_pfn = start >> PAGE_SHIFT;
- end_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
- << (PMD_SHIFT - PAGE_SHIFT);
- }
- if (start_pfn < end_pfn)
- kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn, 0);
-
- /* big page range */
- start_pfn = ((start + (PMD_SIZE - 1))>>PMD_SHIFT)
- << (PMD_SHIFT - PAGE_SHIFT);
- if (start_pfn < (big_page_start >> PAGE_SHIFT))
- start_pfn = big_page_start >> PAGE_SHIFT;
- end_pfn = (end>>PMD_SHIFT) << (PMD_SHIFT - PAGE_SHIFT);
- if (start_pfn < end_pfn)
- kernel_physical_mapping_init(pgd_base, start_pfn, end_pfn,
- use_pse);
-
- /* tail is not big page alignment ? */
- start_pfn = end_pfn;
- if (start_pfn > (big_page_start>>PAGE_SHIFT)) {
- end_pfn = end >> PAGE_SHIFT;
- if (start_pfn < end_pfn)
- kernel_physical_mapping_init(pgd_base, start_pfn,
- end_pfn, 0);
- }
-
- early_ioremap_page_table_range_init(pgd_base);
-
- load_cr3(swapper_pg_dir);
-
- __flush_tlb_all();
-
- if (!after_init_bootmem)
- reserve_early(table_start << PAGE_SHIFT,
- table_end << PAGE_SHIFT, "PGTABLE");
-
- if (!after_init_bootmem)
- early_memtest(start, end);
-
- return end >> PAGE_SHIFT;
+ after_bootmem = 1;
}
-
/*
* paging_init() sets up the page tables - note that the first 8MB are
* already mapped by head.S.
}
#endif
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
- free_init_pages("initrd memory", start, end);
-}
-#endif
-
int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
int flags)
{
projects / linux-2.6-omap-h63xx.git / blobdiff