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Diffstat (limited to 'arch/x86_64/mm/init.c')
-rw-r--r--arch/x86_64/mm/init.c590
1 files changed, 0 insertions, 590 deletions
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
deleted file mode 100644
index e60a1a848de..00000000000
--- a/arch/x86_64/mm/init.c
+++ /dev/null
@@ -1,590 +0,0 @@
-/*
- * linux/arch/x86_64/mm/init.c
- *
- * Copyright (C) 1995 Linus Torvalds
- * Copyright (C) 2000 Pavel Machek <pavel@suse.cz>
- * Copyright (C) 2002,2003 Andi Kleen <ak@suse.de>
- */
-
-#include <linux/config.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/smp.h>
-#include <linux/init.h>
-#include <linux/pagemap.h>
-#include <linux/bootmem.h>
-#include <linux/proc_fs.h>
-
-#include <asm/processor.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/pgalloc.h>
-#include <asm/dma.h>
-#include <asm/fixmap.h>
-#include <asm/e820.h>
-#include <asm/apic.h>
-#include <asm/tlb.h>
-#include <asm/mmu_context.h>
-#include <asm/proto.h>
-#include <asm/smp.h>
-
-#ifndef Dprintk
-#define Dprintk(x...)
-#endif
-
-#ifdef CONFIG_GART_IOMMU
-extern int swiotlb;
-#endif
-
-extern char _stext[];
-
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-
-/*
- * NOTE: pagetable_init alloc all the fixmap pagetables contiguous on the
- * physical space so we can cache the place of the first one and move
- * around without checking the pgd every time.
- */
-
-void show_mem(void)
-{
- long i, total = 0, reserved = 0;
- long shared = 0, cached = 0;
- pg_data_t *pgdat;
- struct page *page;
-
- printk(KERN_INFO "Mem-info:\n");
- show_free_areas();
- printk(KERN_INFO "Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
-
- for_each_pgdat(pgdat) {
- for (i = 0; i < pgdat->node_spanned_pages; ++i) {
- page = pfn_to_page(pgdat->node_start_pfn + i);
- total++;
- if (PageReserved(page))
- reserved++;
- else if (PageSwapCache(page))
- cached++;
- else if (page_count(page))
- shared += page_count(page) - 1;
- }
- }
- printk(KERN_INFO "%lu pages of RAM\n", total);
- printk(KERN_INFO "%lu reserved pages\n",reserved);
- printk(KERN_INFO "%lu pages shared\n",shared);
- printk(KERN_INFO "%lu pages swap cached\n",cached);
-}
-
-/* References to section boundaries */
-
-extern char _text, _etext, _edata, __bss_start, _end[];
-extern char __init_begin, __init_end;
-
-int after_bootmem;
-
-static void *spp_getpage(void)
-{
- void *ptr;
- if (after_bootmem)
- ptr = (void *) get_zeroed_page(GFP_ATOMIC);
- else
- ptr = alloc_bootmem_pages(PAGE_SIZE);
- if (!ptr || ((unsigned long)ptr & ~PAGE_MASK))
- panic("set_pte_phys: cannot allocate page data %s\n", after_bootmem?"after bootmem":"");
-
- Dprintk("spp_getpage %p\n", ptr);
- return ptr;
-}
-
-static void set_pte_phys(unsigned long vaddr,
- unsigned long phys, pgprot_t prot)
-{
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte, new_pte;
-
- Dprintk("set_pte_phys %lx to %lx\n", vaddr, phys);
-
- pgd = pgd_offset_k(vaddr);
- if (pgd_none(*pgd)) {
- printk("PGD FIXMAP MISSING, it should be setup in head.S!\n");
- return;
- }
- pud = pud_offset(pgd, vaddr);
- if (pud_none(*pud)) {
- pmd = (pmd_t *) spp_getpage();
- set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
- if (pmd != pmd_offset(pud, 0)) {
- printk("PAGETABLE BUG #01! %p <-> %p\n", pmd, pmd_offset(pud,0));
- return;
- }
- }
- pmd = pmd_offset(pud, vaddr);
- if (pmd_none(*pmd)) {
- pte = (pte_t *) spp_getpage();
- set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
- if (pte != pte_offset_kernel(pmd, 0)) {
- printk("PAGETABLE BUG #02!\n");
- return;
- }
- }
- new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
-
- pte = pte_offset_kernel(pmd, vaddr);
- if (!pte_none(*pte) &&
- pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
- pte_ERROR(*pte);
- set_pte(pte, new_pte);
-
- /*
- * It's enough to flush this one mapping.
- * (PGE mappings get flushed as well)
- */
- __flush_tlb_one(vaddr);
-}
-
-/* NOTE: this is meant to be run only at boot */
-void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
-{
- unsigned long address = __fix_to_virt(idx);
-
- if (idx >= __end_of_fixed_addresses) {
- printk("Invalid __set_fixmap\n");
- return;
- }
- set_pte_phys(address, phys, prot);
-}
-
-unsigned long __initdata table_start, table_end;
-
-extern pmd_t temp_boot_pmds[];
-
-static struct temp_map {
- pmd_t *pmd;
- void *address;
- int allocated;
-} temp_mappings[] __initdata = {
- { &temp_boot_pmds[0], (void *)(40UL * 1024 * 1024) },
- { &temp_boot_pmds[1], (void *)(42UL * 1024 * 1024) },
- {}
-};
-
-static __init void *alloc_low_page(int *index, unsigned long *phys)
-{
- struct temp_map *ti;
- int i;
- unsigned long pfn = table_end++, paddr;
- void *adr;
-
- if (pfn >= end_pfn)
- panic("alloc_low_page: ran out of memory");
- for (i = 0; temp_mappings[i].allocated; i++) {
- if (!temp_mappings[i].pmd)
- panic("alloc_low_page: ran out of temp mappings");
- }
- ti = &temp_mappings[i];
- paddr = (pfn << PAGE_SHIFT) & PMD_MASK;
- set_pmd(ti->pmd, __pmd(paddr | _KERNPG_TABLE | _PAGE_PSE));
- ti->allocated = 1;
- __flush_tlb();
- adr = ti->address + ((pfn << PAGE_SHIFT) & ~PMD_MASK);
- *index = i;
- *phys = pfn * PAGE_SIZE;
- return adr;
-}
-
-static __init void unmap_low_page(int i)
-{
- struct temp_map *ti = &temp_mappings[i];
- set_pmd(ti->pmd, __pmd(0));
- ti->allocated = 0;
-}
-
-static void __init phys_pud_init(pud_t *pud, unsigned long address, unsigned long end)
-{
- long i, j;
-
- i = pud_index(address);
- pud = pud + i;
- for (; i < PTRS_PER_PUD; pud++, i++) {
- int map;
- unsigned long paddr, pmd_phys;
- pmd_t *pmd;
-
- paddr = address + i*PUD_SIZE;
- if (paddr >= end) {
- for (; i < PTRS_PER_PUD; i++, pud++)
- set_pud(pud, __pud(0));
- break;
- }
-
- if (!e820_mapped(paddr, paddr+PUD_SIZE, 0)) {
- set_pud(pud, __pud(0));
- continue;
- }
-
- pmd = alloc_low_page(&map, &pmd_phys);
- set_pud(pud, __pud(pmd_phys | _KERNPG_TABLE));
- for (j = 0; j < PTRS_PER_PMD; pmd++, j++, paddr += PMD_SIZE) {
- unsigned long pe;
-
- if (paddr >= end) {
- for (; j < PTRS_PER_PMD; j++, pmd++)
- set_pmd(pmd, __pmd(0));
- break;
- }
- pe = _PAGE_NX|_PAGE_PSE | _KERNPG_TABLE | _PAGE_GLOBAL | paddr;
- pe &= __supported_pte_mask;
- set_pmd(pmd, __pmd(pe));
- }
- unmap_low_page(map);
- }
- __flush_tlb();
-}
-
-static void __init find_early_table_space(unsigned long end)
-{
- unsigned long puds, pmds, tables;
-
- puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
- pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
- tables = round_up(puds * sizeof(pud_t), PAGE_SIZE) +
- round_up(pmds * sizeof(pmd_t), PAGE_SIZE);
-
- table_start = find_e820_area(0x8000, __pa_symbol(&_text), tables);
- if (table_start == -1UL)
- panic("Cannot find space for the kernel page tables");
-
- table_start >>= PAGE_SHIFT;
- table_end = table_start;
-}
-
-/* Setup the direct mapping of the physical memory at PAGE_OFFSET.
- This runs before bootmem is initialized and gets pages directly from the
- physical memory. To access them they are temporarily mapped. */
-void __init init_memory_mapping(unsigned long start, unsigned long end)
-{
- unsigned long next;
-
- Dprintk("init_memory_mapping\n");
-
- /*
- * 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.
- */
- find_early_table_space(end);
-
- start = (unsigned long)__va(start);
- end = (unsigned long)__va(end);
-
- for (; start < end; start = next) {
- int map;
- unsigned long pud_phys;
- pud_t *pud = alloc_low_page(&map, &pud_phys);
- next = start + PGDIR_SIZE;
- if (next > end)
- next = end;
- phys_pud_init(pud, __pa(start), __pa(next));
- set_pgd(pgd_offset_k(start), mk_kernel_pgd(pud_phys));
- unmap_low_page(map);
- }
-
- asm volatile("movq %%cr4,%0" : "=r" (mmu_cr4_features));
- __flush_tlb_all();
- early_printk("kernel direct mapping tables upto %lx @ %lx-%lx\n", end,
- table_start<<PAGE_SHIFT,
- table_end<<PAGE_SHIFT);
-}
-
-extern struct x8664_pda cpu_pda[NR_CPUS];
-
-/* Assumes all CPUs still execute in init_mm */
-void zap_low_mappings(void)
-{
- pgd_t *pgd = pgd_offset_k(0UL);
- pgd_clear(pgd);
- flush_tlb_all();
-}
-
-#ifndef CONFIG_NUMA
-void __init paging_init(void)
-{
- {
- unsigned long zones_size[MAX_NR_ZONES];
- unsigned long holes[MAX_NR_ZONES];
- unsigned int max_dma;
-
- memset(zones_size, 0, sizeof(zones_size));
- memset(holes, 0, sizeof(holes));
-
- max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
-
- if (end_pfn < max_dma) {
- zones_size[ZONE_DMA] = end_pfn;
- holes[ZONE_DMA] = e820_hole_size(0, end_pfn);
- } else {
- zones_size[ZONE_DMA] = max_dma;
- holes[ZONE_DMA] = e820_hole_size(0, max_dma);
- zones_size[ZONE_NORMAL] = end_pfn - max_dma;
- holes[ZONE_NORMAL] = e820_hole_size(max_dma, end_pfn);
- }
- free_area_init_node(0, NODE_DATA(0), zones_size,
- __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes);
- }
- return;
-}
-#endif
-
-/* Unmap a kernel mapping if it exists. This is useful to avoid prefetches
- from the CPU leading to inconsistent cache lines. address and size
- must be aligned to 2MB boundaries.
- Does nothing when the mapping doesn't exist. */
-void __init clear_kernel_mapping(unsigned long address, unsigned long size)
-{
- unsigned long end = address + size;
-
- BUG_ON(address & ~LARGE_PAGE_MASK);
- BUG_ON(size & ~LARGE_PAGE_MASK);
-
- for (; address < end; address += LARGE_PAGE_SIZE) {
- pgd_t *pgd = pgd_offset_k(address);
- pud_t *pud;
- pmd_t *pmd;
- if (pgd_none(*pgd))
- continue;
- pud = pud_offset(pgd, address);
- if (pud_none(*pud))
- continue;
- pmd = pmd_offset(pud, address);
- if (!pmd || pmd_none(*pmd))
- continue;
- if (0 == (pmd_val(*pmd) & _PAGE_PSE)) {
- /* Could handle this, but it should not happen currently. */
- printk(KERN_ERR
- "clear_kernel_mapping: mapping has been split. will leak memory\n");
- pmd_ERROR(*pmd);
- }
- set_pmd(pmd, __pmd(0));
- }
- __flush_tlb_all();
-}
-
-static struct kcore_list kcore_mem, kcore_vmalloc, kcore_kernel, kcore_modules,
- kcore_vsyscall;
-
-void __init mem_init(void)
-{
- long codesize, reservedpages, datasize, initsize;
-
-#ifdef CONFIG_SWIOTLB
- if (!iommu_aperture &&
- (end_pfn >= 0xffffffff>>PAGE_SHIFT || force_iommu))
- swiotlb = 1;
- if (swiotlb)
- swiotlb_init();
-#endif
-
- /* How many end-of-memory variables you have, grandma! */
- max_low_pfn = end_pfn;
- max_pfn = end_pfn;
- num_physpages = end_pfn;
- high_memory = (void *) __va(end_pfn * PAGE_SIZE);
-
- /* clear the zero-page */
- memset(empty_zero_page, 0, PAGE_SIZE);
-
- reservedpages = 0;
-
- /* this will put all low memory onto the freelists */
-#ifdef CONFIG_NUMA
- totalram_pages = numa_free_all_bootmem();
-#else
- totalram_pages = free_all_bootmem();
-#endif
- reservedpages = end_pfn - totalram_pages - e820_hole_size(0, end_pfn);
-
- after_bootmem = 1;
-
- codesize = (unsigned long) &_etext - (unsigned long) &_text;
- datasize = (unsigned long) &_edata - (unsigned long) &_etext;
- initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
-
- /* Register memory areas for /proc/kcore */
- kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
- kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
- VMALLOC_END-VMALLOC_START);
- kclist_add(&kcore_kernel, &_stext, _end - _stext);
- kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN);
- kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
- VSYSCALL_END - VSYSCALL_START);
-
- printk("Memory: %luk/%luk available (%ldk kernel code, %ldk reserved, %ldk data, %ldk init)\n",
- (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
- end_pfn << (PAGE_SHIFT-10),
- codesize >> 10,
- reservedpages << (PAGE_SHIFT-10),
- datasize >> 10,
- initsize >> 10);
-
- /*
- * Subtle. SMP is doing its boot stuff late (because it has to
- * fork idle threads) - but it also needs low mappings for the
- * protected-mode entry to work. We zap these entries only after
- * the WP-bit has been tested.
- */
-#ifndef CONFIG_SMP
- zap_low_mappings();
-#endif
-}
-
-extern char __initdata_begin[], __initdata_end[];
-
-void free_initmem(void)
-{
- unsigned long addr;
-
- addr = (unsigned long)(&__init_begin);
- for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(addr));
- set_page_count(virt_to_page(addr), 1);
- memset((void *)(addr & ~(PAGE_SIZE-1)), 0xcc, PAGE_SIZE);
- free_page(addr);
- totalram_pages++;
- }
- memset(__initdata_begin, 0xba, __initdata_end - __initdata_begin);
- printk ("Freeing unused kernel memory: %luk freed\n", (&__init_end - &__init_begin) >> 10);
-}
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
- if (start < (unsigned long)&_end)
- return;
- printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
- for (; start < end; start += PAGE_SIZE) {
- ClearPageReserved(virt_to_page(start));
- set_page_count(virt_to_page(start), 1);
- free_page(start);
- totalram_pages++;
- }
-}
-#endif
-
-void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
-{
- /* Should check here against the e820 map to avoid double free */
-#ifdef CONFIG_NUMA
- int nid = phys_to_nid(phys);
- reserve_bootmem_node(NODE_DATA(nid), phys, len);
-#else
- reserve_bootmem(phys, len);
-#endif
-}
-
-int kern_addr_valid(unsigned long addr)
-{
- unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT;
- pgd_t *pgd;
- pud_t *pud;
- pmd_t *pmd;
- pte_t *pte;
-
- if (above != 0 && above != -1UL)
- return 0;
-
- pgd = pgd_offset_k(addr);
- if (pgd_none(*pgd))
- return 0;
-
- pud = pud_offset(pgd, addr);
- if (pud_none(*pud))
- return 0;
-
- pmd = pmd_offset(pud, addr);
- if (pmd_none(*pmd))
- return 0;
- if (pmd_large(*pmd))
- return pfn_valid(pmd_pfn(*pmd));
-
- pte = pte_offset_kernel(pmd, addr);
- if (pte_none(*pte))
- return 0;
- return pfn_valid(pte_pfn(*pte));
-}
-
-#ifdef CONFIG_SYSCTL
-#include <linux/sysctl.h>
-
-extern int exception_trace, page_fault_trace;
-
-static ctl_table debug_table2[] = {
- { 99, "exception-trace", &exception_trace, sizeof(int), 0644, NULL,
- proc_dointvec },
-#ifdef CONFIG_CHECKING
- { 100, "page-fault-trace", &page_fault_trace, sizeof(int), 0644, NULL,
- proc_dointvec },
-#endif
- { 0, }
-};
-
-static ctl_table debug_root_table2[] = {
- { .ctl_name = CTL_DEBUG, .procname = "debug", .mode = 0555,
- .child = debug_table2 },
- { 0 },
-};
-
-static __init int x8664_sysctl_init(void)
-{
- register_sysctl_table(debug_root_table2, 1);
- return 0;
-}
-__initcall(x8664_sysctl_init);
-#endif
-
-/* A pseudo VMAs to allow ptrace access for the vsyscall page. This only
- covers the 64bit vsyscall page now. 32bit has a real VMA now and does
- not need special handling anymore. */
-
-static struct vm_area_struct gate_vma = {
- .vm_start = VSYSCALL_START,
- .vm_end = VSYSCALL_END,
- .vm_page_prot = PAGE_READONLY
-};
-
-struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
-{
-#ifdef CONFIG_IA32_EMULATION
- if (test_tsk_thread_flag(tsk, TIF_IA32))
- return NULL;
-#endif
- return &gate_vma;
-}
-
-int in_gate_area(struct task_struct *task, unsigned long addr)
-{
- struct vm_area_struct *vma = get_gate_vma(task);
- if (!vma)
- return 0;
- return (addr >= vma->vm_start) && (addr < vma->vm_end);
-}
-
-/* Use this when you have no reliable task/vma, typically from interrupt
- * context. It is less reliable than using the task's vma and may give
- * false positives.
- */
-int in_gate_area_no_task(unsigned long addr)
-{
- return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END);
-}
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