unsigned int __VMALLOC_RESERVE = 128 << 20;
+unsigned long max_low_pfn_mapped;
unsigned long max_pfn_mapped;
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
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;
+
+static __init void *alloc_low_page(unsigned long *phys)
+{
+ unsigned long pfn = table_end++;
+ void *adr;
+
+ if (pfn >= table_top)
+ panic("alloc_low_page: ran out of memory");
+
+ adr = __va(pfn * PAGE_SIZE);
+ memset(adr, 0, PAGE_SIZE);
+ *phys = pfn * PAGE_SIZE;
+ return adr;
+}
+
/*
* Creates a middle page table and puts a pointer to it in the
* given global directory entry. This only returns the gd entry
pmd_t *pmd_table;
#ifdef CONFIG_X86_PAE
+ unsigned long phys;
if (!(pgd_val(*pgd) & _PAGE_PRESENT)) {
- pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
-
+ if (after_init_bootmem)
+ pmd_table = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+ else
+ pmd_table = (pmd_t *)alloc_low_page(&phys);
paravirt_alloc_pmd(&init_mm, __pa(pmd_table) >> PAGE_SHIFT);
set_pgd(pgd, __pgd(__pa(pmd_table) | _PAGE_PRESENT));
pud = pud_offset(pgd, 0);
if (!(pmd_val(*pmd) & _PAGE_PRESENT)) {
pte_t *page_table = NULL;
+ if (after_init_bootmem) {
#ifdef CONFIG_DEBUG_PAGEALLOC
- page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
+ page_table = (pte_t *) alloc_bootmem_pages(PAGE_SIZE);
#endif
- if (!page_table) {
- page_table =
+ if (!page_table)
+ page_table =
(pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+ } else {
+ unsigned long phys;
+ page_table = (pte_t *)alloc_low_page(&phys);
}
paravirt_alloc_pte(&init_mm, __pa(page_table) >> PAGE_SHIFT);
* 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)
+static void __init kernel_physical_mapping_init(pgd_t *pgd_base,
+ unsigned long start_pfn,
+ unsigned long end_pfn,
+ int use_pse)
{
int pgd_idx, pmd_idx, pte_ofs;
unsigned long pfn;
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
+ unsigned pages_2m = 0, pages_4k = 0;
- pgd_idx = pgd_index(PAGE_OFFSET);
- pgd = pgd_base + pgd_idx;
- pfn = 0;
+ if (!cpu_has_pse)
+ use_pse = 0;
+ pfn = start_pfn;
+ pgd_idx = pgd_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pgd = pgd_base + pgd_idx;
for (; pgd_idx < PTRS_PER_PGD; pgd++, pgd_idx++) {
pmd = one_md_table_init(pgd);
- if (pfn >= max_low_pfn)
- continue;
- for (pmd_idx = 0;
- pmd_idx < PTRS_PER_PMD && pfn < max_low_pfn;
+ if (pfn >= end_pfn)
+ continue;
+#ifdef CONFIG_X86_PAE
+ pmd_idx = pmd_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pmd += pmd_idx;
+#else
+ pmd_idx = 0;
+#endif
+ for (; pmd_idx < PTRS_PER_PMD && pfn < end_pfn;
pmd++, pmd_idx++) {
unsigned int addr = pfn * PAGE_SIZE + PAGE_OFFSET;
/*
* Map with big pages if possible, otherwise
* create normal page tables:
- *
- * 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.
*/
- if (cpu_has_pse && !(pgd_idx == 0 && pmd_idx == 0)) {
+ if (use_pse) {
unsigned int addr2;
pgprot_t prot = PAGE_KERNEL_LARGE;
is_kernel_text(addr2))
prot = PAGE_KERNEL_LARGE_EXEC;
+ pages_2m++;
set_pmd(pmd, pfn_pmd(pfn, prot));
pfn += PTRS_PER_PTE;
- max_pfn_mapped = pfn;
continue;
}
pte = one_page_table_init(pmd);
- for (pte_ofs = 0;
- pte_ofs < PTRS_PER_PTE && pfn < max_low_pfn;
+ pte_ofs = pte_index((pfn<<PAGE_SHIFT) + PAGE_OFFSET);
+ pte += pte_ofs;
+ for (; pte_ofs < PTRS_PER_PTE && pfn < end_pfn;
pte++, pfn++, pte_ofs++, addr += PAGE_SIZE) {
pgprot_t prot = PAGE_KERNEL;
if (is_kernel_text(addr))
prot = PAGE_KERNEL_EXEC;
+ pages_4k++;
set_pte(pte, pfn_pte(pfn, prot));
}
- max_pfn_mapped = pfn;
}
}
-}
-
-static inline int page_kills_ppro(unsigned long pagenr)
-{
- if (pagenr >= 0x70000 && pagenr <= 0x7003F)
- return 1;
- return 0;
+ update_page_count(PG_LEVEL_2M, pages_2m);
+ update_page_count(PG_LEVEL_4K, pages_4k);
}
/*
pkmap_page_table = pte;
}
-void __init add_one_highpage_init(struct page *page, int pfn, int bad_ppro)
+static void __init add_one_highpage_init(struct page *page, int pfn)
{
- if (page_is_ram(pfn) && !(bad_ppro && page_kills_ppro(pfn))) {
- ClearPageReserved(page);
- init_page_count(page);
- __free_page(page);
- totalhigh_pages++;
- } else
- SetPageReserved(page);
+ ClearPageReserved(page);
+ init_page_count(page);
+ __free_page(page);
+ totalhigh_pages++;
}
-#ifndef CONFIG_NUMA
-static void __init set_highmem_pages_init(int bad_ppro)
+struct add_highpages_data {
+ unsigned long start_pfn;
+ unsigned long end_pfn;
+};
+
+static int __init add_highpages_work_fn(unsigned long start_pfn,
+ unsigned long end_pfn, void *datax)
{
- int pfn;
+ int node_pfn;
+ struct page *page;
+ unsigned long final_start_pfn, final_end_pfn;
+ struct add_highpages_data *data;
- for (pfn = highstart_pfn; pfn < highend_pfn; pfn++) {
- /*
- * Holes under sparsemem might not have no mem_map[]:
- */
- if (pfn_valid(pfn))
- add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
+ data = (struct add_highpages_data *)datax;
+
+ final_start_pfn = max(start_pfn, data->start_pfn);
+ final_end_pfn = min(end_pfn, data->end_pfn);
+ if (final_start_pfn >= final_end_pfn)
+ return 0;
+
+ for (node_pfn = final_start_pfn; node_pfn < final_end_pfn;
+ node_pfn++) {
+ if (!pfn_valid(node_pfn))
+ continue;
+ page = pfn_to_page(node_pfn);
+ add_one_highpage_init(page, node_pfn);
}
+
+ return 0;
+
+}
+
+void __init add_highpages_with_active_regions(int nid, unsigned long start_pfn,
+ unsigned long end_pfn)
+{
+ struct add_highpages_data data;
+
+ data.start_pfn = start_pfn;
+ data.end_pfn = end_pfn;
+
+ 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
# define kmap_init() do { } while (0)
# define permanent_kmaps_init(pgd_base) do { } while (0)
-# define set_highmem_pages_init(bad_ppro) do { } while (0)
+# define set_highmem_pages_init() do { } while (0)
#endif /* CONFIG_HIGHMEM */
-pteval_t __PAGE_KERNEL = _PAGE_KERNEL;
-EXPORT_SYMBOL(__PAGE_KERNEL);
-
-pteval_t __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
-
void __init native_pagetable_setup_start(pgd_t *base)
{
unsigned long pfn, va;
* be partially populated, and so it avoids stomping on any existing
* mappings.
*/
-static void __init pagetable_init(void)
+static void __init early_ioremap_page_table_range_init(pgd_t *pgd_base)
{
- pgd_t *pgd_base = swapper_pg_dir;
unsigned long vaddr, end;
- paravirt_pagetable_setup_start(pgd_base);
-
- /* 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);
- __PAGE_KERNEL |= _PAGE_GLOBAL;
- __PAGE_KERNEL_EXEC |= _PAGE_GLOBAL;
- }
-
- kernel_physical_mapping_init(pgd_base);
- remap_numa_kva();
-
/*
* Fixed mappings, only the page table structure has to be
* created - mappings will be set by set_fixmap():
end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK;
page_table_range_init(vaddr, end, pgd_base);
early_ioremap_reset();
+}
+
+static void __init pagetable_init(void)
+{
+ pgd_t *pgd_base = swapper_pg_dir;
+
+ paravirt_pagetable_setup_start(pgd_base);
permanent_kmaps_init(pgd_base);
int nx_enabled;
-pteval_t __supported_pte_mask __read_mostly = ~_PAGE_NX;
+pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
EXPORT_SYMBOL_GPL(__supported_pte_mask);
#ifdef CONFIG_X86_PAE
}
#endif
+/* user-defined highmem size */
+static unsigned int highmem_pages = -1;
+
/*
- * paging_init() sets up the page tables - note that the first 8MB are
- * already mapped by head.S.
- *
- * This routines also unmaps the page at virtual kernel address 0, so
- * that we can trap those pesky NULL-reference errors in the kernel.
+ * highmem=size forces highmem to be exactly 'size' bytes.
+ * This works even on boxes that have no highmem otherwise.
+ * This also works to reduce highmem size on bigger boxes.
*/
-void __init paging_init(void)
+static int __init parse_highmem(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+
+ highmem_pages = memparse(arg, &arg) >> PAGE_SHIFT;
+ return 0;
+}
+early_param("highmem", parse_highmem);
+
+/*
+ * Determine low and high memory ranges:
+ */
+void __init find_low_pfn_range(void)
+{
+ /* it could update max_pfn */
+
+ /* max_low_pfn is 0, we already have early_res support */
+
+ max_low_pfn = max_pfn;
+ if (max_low_pfn > MAXMEM_PFN) {
+ if (highmem_pages == -1)
+ highmem_pages = max_pfn - MAXMEM_PFN;
+ if (highmem_pages + MAXMEM_PFN < max_pfn)
+ max_pfn = MAXMEM_PFN + highmem_pages;
+ if (highmem_pages + MAXMEM_PFN > max_pfn) {
+ printk(KERN_WARNING "only %luMB highmem pages "
+ "available, ignoring highmem size of %uMB.\n",
+ pages_to_mb(max_pfn - MAXMEM_PFN),
+ pages_to_mb(highmem_pages));
+ highmem_pages = 0;
+ }
+ max_low_pfn = MAXMEM_PFN;
+#ifndef CONFIG_HIGHMEM
+ /* Maximum memory usable is what is directly addressable */
+ printk(KERN_WARNING "Warning only %ldMB will be used.\n",
+ MAXMEM>>20);
+ if (max_pfn > MAX_NONPAE_PFN)
+ printk(KERN_WARNING
+ "Use a HIGHMEM64G enabled kernel.\n");
+ else
+ printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+ max_pfn = MAXMEM_PFN;
+#else /* !CONFIG_HIGHMEM */
+#ifndef CONFIG_HIGHMEM64G
+ if (max_pfn > MAX_NONPAE_PFN) {
+ max_pfn = MAX_NONPAE_PFN;
+ printk(KERN_WARNING "Warning only 4GB will be used."
+ "Use a HIGHMEM64G enabled kernel.\n");
+ }
+#endif /* !CONFIG_HIGHMEM64G */
+#endif /* !CONFIG_HIGHMEM */
+ } else {
+ if (highmem_pages == -1)
+ highmem_pages = 0;
+#ifdef CONFIG_HIGHMEM
+ if (highmem_pages >= max_pfn) {
+ printk(KERN_ERR "highmem size specified (%uMB) is "
+ "bigger than pages available (%luMB)!.\n",
+ pages_to_mb(highmem_pages),
+ pages_to_mb(max_pfn));
+ highmem_pages = 0;
+ }
+ if (highmem_pages) {
+ if (max_low_pfn - highmem_pages <
+ 64*1024*1024/PAGE_SIZE){
+ printk(KERN_ERR "highmem size %uMB results in "
+ "smaller than 64MB lowmem, ignoring it.\n"
+ , pages_to_mb(highmem_pages));
+ highmem_pages = 0;
+ }
+ max_low_pfn -= highmem_pages;
+ }
+#else
+ if (highmem_pages)
+ printk(KERN_ERR "ignoring highmem size on non-highmem"
+ " kernel!\n");
+#endif
+ }
+}
+
+#ifndef CONFIG_NEED_MULTIPLE_NODES
+void __init initmem_init(unsigned long start_pfn,
+ unsigned long end_pfn)
{
+#ifdef CONFIG_HIGHMEM
+ highstart_pfn = highend_pfn = max_pfn;
+ if (max_pfn > max_low_pfn)
+ highstart_pfn = max_low_pfn;
+ memory_present(0, 0, highend_pfn);
+ e820_register_active_regions(0, 0, highend_pfn);
+ printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
+ pages_to_mb(highend_pfn - highstart_pfn));
+ num_physpages = highend_pfn;
+ high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
+#else
+ memory_present(0, 0, max_low_pfn);
+ e820_register_active_regions(0, 0, max_low_pfn);
+ num_physpages = max_low_pfn;
+ high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
+#endif
+#ifdef CONFIG_FLATMEM
+ max_mapnr = num_physpages;
+#endif
+ printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
+ pages_to_mb(max_low_pfn));
+
+ setup_bootmem_allocator();
+}
+#endif /* !CONFIG_NEED_MULTIPLE_NODES */
+
+static void __init zone_sizes_init(void)
+{
+ unsigned long max_zone_pfns[MAX_NR_ZONES];
+ memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
+ max_zone_pfns[ZONE_DMA] =
+ virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+ max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+#ifdef CONFIG_HIGHMEM
+ max_zone_pfns[ZONE_HIGHMEM] = highend_pfn;
+#endif
+
+ free_area_init_nodes(max_zone_pfns);
+}
+
+void __init setup_bootmem_allocator(void)
+{
+ int i;
+ 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,
+ 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)
+{
+ unsigned long puds, pmds, ptes, tables, start;
+
+ puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
+ tables = PAGE_ALIGN(puds * sizeof(pud_t));
+
+ pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
+ tables += PAGE_ALIGN(pmds * sizeof(pmd_t));
+
+ if (cpu_has_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 += PAGE_ALIGN(ptes * sizeof(pte_t));
+
+ /* for fixmap */
+ tables += PAGE_SIZE * 2;
+
+ /*
+ * 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;
+
+ /*
+ * Find space for the kernel direct mapping tables.
+ */
+ if (!after_init_bootmem)
+ find_early_table_space(end);
+
#ifdef CONFIG_X86_PAE
set_nx();
if (nx_enabled)
printk(KERN_INFO "NX (Execute Disable) protection: active\n");
#endif
- pagetable_init();
+
+ /* 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,
+ cpu_has_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;
+}
+
+
+/*
+ * paging_init() sets up the page tables - note that the first 8MB are
+ * already mapped by head.S.
+ *
+ * This routines also unmaps the page at virtual kernel address 0, so
+ * that we can trap those pesky NULL-reference errors in the kernel.
+ */
+void __init paging_init(void)
+{
+ pagetable_init();
+
+ __flush_tlb_all();
+
kmap_init();
+
+ /*
+ * NOTE: at this point the bootmem allocator is fully available.
+ */
+ sparse_init();
+ zone_sizes_init();
}
/*
void __init mem_init(void)
{
int codesize, reservedpages, datasize, initsize;
- int tmp, bad_ppro;
+ int tmp;
#ifdef CONFIG_FLATMEM
BUG_ON(!mem_map);
-#endif
- bad_ppro = ppro_with_ram_bug();
-
-#ifdef CONFIG_HIGHMEM
- /* check that fixmap and pkmap do not overlap */
- if (PKMAP_BASE + LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
- printk(KERN_ERR
- "fixmap and kmap areas overlap - this will crash\n");
- printk(KERN_ERR "pkstart: %lxh pkend: %lxh fixstart %lxh\n",
- PKMAP_BASE, PKMAP_BASE + LAST_PKMAP*PAGE_SIZE,
- FIXADDR_START);
- BUG();
- }
#endif
/* this will put all low memory onto the freelists */
totalram_pages += free_all_bootmem();
if (page_is_ram(tmp) && PageReserved(pfn_to_page(tmp)))
reservedpages++;
- set_highmem_pages_init(bad_ppro);
+ set_highmem_pages_init();
codesize = (unsigned long) &_etext - (unsigned long) &_text;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
(unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
);
-#if 1 /* double-sanity-check paranoia */
printk(KERN_INFO "virtual kernel memory layout:\n"
" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
#ifdef CONFIG_HIGHMEM
#endif
BUG_ON(VMALLOC_START > VMALLOC_END);
BUG_ON((unsigned long)high_memory > VMALLOC_START);
-#endif /* double-sanity-check paranoia */
if (boot_cpu_data.wp_works_ok < 0)
test_wp_bit();
unsigned long start = PFN_ALIGN(_text);
unsigned long size = PFN_ALIGN(_etext) - start;
+#ifndef CONFIG_DYNAMIC_FTRACE
+ /* Dynamic tracing modifies the kernel text section */
set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
printk(KERN_INFO "Write protecting the kernel text: %luk\n",
size >> 10);
printk(KERN_INFO "Testing CPA: write protecting again\n");
set_pages_ro(virt_to_page(start), size>>PAGE_SHIFT);
#endif
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
start += size;
size = (unsigned long)__end_rodata - start;
set_pages_ro(virt_to_page(start), size >> PAGE_SHIFT);
free_init_pages("initrd memory", start, end);
}
#endif
+
+int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
+ int flags)
+{
+ return reserve_bootmem(phys, len, flags);
+}
git.samba.org / sfrench / cifs-2.6.git / blobdiff