puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
+
if (use_gbpages) {
unsigned long extra;
+
extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
} else
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);
+#ifdef CONFIG_X86_32
+ extra += PMD_SIZE;
+#endif
ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else
ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
+
tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
+#ifdef CONFIG_X86_32
+ /* for fixmap */
+ tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
+#endif
+
/*
* 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.
*/
+#ifdef CONFIG_X86_32
+ start = 0x7000;
+ table_start = find_e820_area(start, max_pfn_mapped<<PAGE_SHIFT,
+ tables, PAGE_SIZE);
+#else /* CONFIG_X86_64 */
start = 0x8000;
table_start = find_e820_area(start, end, tables, PAGE_SIZE);
+#endif
if (table_start == -1UL)
panic("Cannot find space for the kernel page tables");
direct_gbpages = 0;
}
-static unsigned long __init kernel_physical_mapping_init(unsigned long start,
+static unsigned long __meminit kernel_physical_mapping_init(unsigned long start,
unsigned long end,
unsigned long page_size_mask)
{
unsigned long start_pfn, unsigned long end_pfn,
unsigned long page_size_mask)
{
-
if (start_pfn < end_pfn) {
if (nr_range >= NR_RANGE_MR)
panic("run out of range for init_memory_mapping\n");
printk(KERN_INFO "init_memory_mapping: %016lx-%016lx\n", start, end);
- /*
- * Find space for the kernel direct mapping tables.
- *
- * Later we should allocate these tables in the local node of the
- * memory mapped. Unfortunately this is done currently before the
- * nodes are discovered.
- */
if (!after_bootmem)
init_gbpages();
memset(mr, 0, sizeof(mr));
nr_range = 0;
- /* head if not big page alignment ?*/
+ /* head if not big page alignment ? */
start_pfn = start >> PAGE_SHIFT;
pos = start_pfn << PAGE_SHIFT;
end_pfn = ((pos + (PMD_SIZE - 1)) >> PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
+ if (end_pfn > (end >> PAGE_SHIFT))
+ end_pfn = end >> PAGE_SHIFT;
if (start_pfn < end_pfn) {
nr_range = save_mr(mr, nr_range, start_pfn, end_pfn, 0);
pos = end_pfn << PAGE_SHIFT;
}
- /* big page (2M) range*/
+ /* big page (2M) range */
start_pfn = ((pos + (PMD_SIZE - 1))>>PMD_SHIFT)
<< (PMD_SHIFT - PAGE_SHIFT);
end_pfn = ((pos + (PUD_SIZE - 1))>>PUD_SHIFT)
/* move it */
old_start = mr[i].start;
memmove(&mr[i], &mr[i+1],
- (nr_range - 1 - i) * sizeof (struct map_range));
+ (nr_range - 1 - i) * sizeof(struct map_range));
mr[i--].start = old_start;
nr_range--;
}
(mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
(mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
+ /*
+ * Find space for the kernel direct mapping tables.
+ *
+ * Later we should allocate these tables in the local node of the
+ * memory mapped. Unfortunately this is done currently before the
+ * nodes are discovered.
+ */
if (!after_bootmem)
find_early_table_space(end, use_pse, use_gbpages);
if (last_mapped_pfn > max_pfn_mapped)
max_pfn_mapped = last_mapped_pfn;
- ret = __add_pages(zone, start_pfn, nr_pages);
+ ret = __add_pages(nid, zone, start_pfn, nr_pages);
WARN_ON_ONCE(ret);
return ret;
#endif /* CONFIG_MEMORY_HOTPLUG */
-/*
- * 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 (!page_is_ram(pagenr))
- return 1;
- return 0;
-}
-
-
static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel,
kcore_modules, kcore_vsyscall;
long codesize, reservedpages, datasize, initsize;
unsigned long absent_pages;
- start_periodic_check_for_corruption();
-
pci_iommu_alloc();
/* clear_bss() already clear the empty_zero_page */
initsize >> 10);
}
-void free_init_pages(char *what, unsigned long begin, unsigned long end)
-{
- unsigned long addr = begin;
-
- if (addr >= end)
- return;
-
- /*
- * If debugging page accesses then do not free this memory but
- * mark them not present - any buggy init-section access will
- * create a kernel page fault:
- */
-#ifdef CONFIG_DEBUG_PAGEALLOC
- printk(KERN_INFO "debug: unmapping init memory %08lx..%08lx\n",
- begin, PAGE_ALIGN(end));
- set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
-#else
- printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
-
- for (; addr < end; addr += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- init_page_count(virt_to_page(addr));
- memset((void *)(addr & ~(PAGE_SIZE-1)),
- POISON_FREE_INITMEM, PAGE_SIZE);
- free_page(addr);
- totalram_pages++;
- }
-#endif
-}
-
-void free_initmem(void)
-{
- free_init_pages("unused kernel memory",
- (unsigned long)(&__init_begin),
- (unsigned long)(&__init_end));
-}
-
#ifdef CONFIG_DEBUG_RODATA
const int rodata_test_data = 0xC3;
EXPORT_SYMBOL_GPL(rodata_test_data);
#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)
{
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff