i386: move mm

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

14 files changed, 1 insertions, 3603 deletions

diff --git a/arch/i386/Makefile b/arch/i386/Makefile
index 776d8dcf234..cbdc14fddc3 100644
--- a/arch/i386/Makefile
+++ b/arch/i386/Makefile
@@ -103,7 +103,7 @@ head-y := arch/i386/kernel/head_32.o arch/i386/kernel/init_task_32.o
 
 libs-y 					+= arch/x86/lib/
 core-y					+= arch/i386/kernel/ \
-					   arch/i386/mm/ \
+					   arch/x86/mm/ \
 					   $(mcore-y)/ \
 					   arch/x86/crypto/
 drivers-$(CONFIG_MATH_EMULATION)	+= arch/x86/math-emu/
diff --git a/arch/i386/mm/Makefile b/arch/i386/mm/Makefile
deleted file mode 100644
index 4042f8563a1..00000000000
--- a/arch/i386/mm/Makefile
+++ /dev/null
@@ -1,5 +0,0 @@
-ifeq ($(CONFIG_X86_32),y)
-include ${srctree}/arch/i386/mm/Makefile_32
-else
-include ${srctree}/arch/x86_64/mm/Makefile_64
-endif
diff --git a/arch/i386/mm/Makefile_32 b/arch/i386/mm/Makefile_32
deleted file mode 100644
index 362b4ad082d..00000000000
--- a/arch/i386/mm/Makefile_32
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# Makefile for the linux i386-specific parts of the memory manager.
-#
-
-obj-y	:= init_32.o pgtable_32.o fault_32.o ioremap_32.o extable_32.o pageattr_32.o mmap_32.o
-
-obj-$(CONFIG_NUMA) += discontig_32.o
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_HIGHMEM) += highmem_32.o
-obj-$(CONFIG_BOOT_IOREMAP) += boot_ioremap_32.o
diff --git a/arch/i386/mm/boot_ioremap_32.c b/arch/i386/mm/boot_ioremap_32.c
deleted file mode 100644
index 4de95a17a7d..00000000000
--- a/arch/i386/mm/boot_ioremap_32.c
+++ /dev/null
@@ -1,100 +0,0 @@
-/*
- * arch/i386/mm/boot_ioremap.c
- * 
- * Re-map functions for early boot-time before paging_init() when the 
- * boot-time pagetables are still in use
- *
- * Written by Dave Hansen <haveblue@us.ibm.com>
- */
-
-
-/*
- * We need to use the 2-level pagetable functions, but CONFIG_X86_PAE
- * keeps that from happenning.  If anyone has a better way, I'm listening.
- *
- * boot_pte_t is defined only if this all works correctly
- */
-
-#undef CONFIG_X86_PAE
-#undef CONFIG_PARAVIRT
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/tlbflush.h>
-#include <linux/init.h>
-#include <linux/stddef.h>
-
-/* 
- * I'm cheating here.  It is known that the two boot PTE pages are 
- * allocated next to each other.  I'm pretending that they're just
- * one big array. 
- */
-
-#define BOOT_PTE_PTRS (PTRS_PER_PTE*2)
-
-static unsigned long boot_pte_index(unsigned long vaddr) 
-{
-	return __pa(vaddr) >> PAGE_SHIFT;
-}
-
-static inline boot_pte_t* boot_vaddr_to_pte(void *address)
-{
-	boot_pte_t* boot_pg = (boot_pte_t*)pg0;
-	return &boot_pg[boot_pte_index((unsigned long)address)];
-}
-
-/*
- * This is only for a caller who is clever enough to page-align
- * phys_addr and virtual_source, and who also has a preference
- * about which virtual address from which to steal ptes
- */
-static void __boot_ioremap(unsigned long phys_addr, unsigned long nrpages, 
-		    void* virtual_source)
-{
-	boot_pte_t* pte;
-	int i;
-	char *vaddr = virtual_source;
-
-	pte = boot_vaddr_to_pte(virtual_source);
-	for (i=0; i < nrpages; i++, phys_addr += PAGE_SIZE, pte++) {
-		set_pte(pte, pfn_pte(phys_addr>>PAGE_SHIFT, PAGE_KERNEL));
-		__flush_tlb_one(&vaddr[i*PAGE_SIZE]);
-	}
-}
-
-/* the virtual space we're going to remap comes from this array */
-#define BOOT_IOREMAP_PAGES 4
-#define BOOT_IOREMAP_SIZE (BOOT_IOREMAP_PAGES*PAGE_SIZE)
-static __initdata char boot_ioremap_space[BOOT_IOREMAP_SIZE]
-		       __attribute__ ((aligned (PAGE_SIZE)));
-
-/*
- * This only applies to things which need to ioremap before paging_init()
- * bt_ioremap() and plain ioremap() are both useless at this point.
- * 
- * When used, we're still using the boot-time pagetables, which only
- * have 2 PTE pages mapping the first 8MB
- *
- * There is no unmap.  The boot-time PTE pages aren't used after boot.
- * If you really want the space back, just remap it yourself.
- * boot_ioremap(&ioremap_space-PAGE_OFFSET, BOOT_IOREMAP_SIZE)
- */
-__init void* boot_ioremap(unsigned long phys_addr, unsigned long size)
-{
-	unsigned long last_addr, offset;
-	unsigned int nrpages;
-	
-	last_addr = phys_addr + size - 1;
-
-	/* page align the requested address */
-	offset = phys_addr & ~PAGE_MASK;
-	phys_addr &= PAGE_MASK;
-	size = PAGE_ALIGN(last_addr) - phys_addr;
-	
-	nrpages = size >> PAGE_SHIFT;
-	if (nrpages > BOOT_IOREMAP_PAGES)
-		return NULL;
-	
-	__boot_ioremap(phys_addr, nrpages, boot_ioremap_space);
-
-	return &boot_ioremap_space[offset];
-}
diff --git a/arch/i386/mm/discontig_32.c b/arch/i386/mm/discontig_32.c
deleted file mode 100644
index 860e912a3fb..00000000000
--- a/arch/i386/mm/discontig_32.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * Written by: Patricia Gaughen <gone@us.ibm.com>, IBM Corporation
- * August 2002: added remote node KVA remap - Martin J. Bligh 
- *
- * Copyright (C) 2002, IBM Corp.
- *
- * All rights reserved.          
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/mm.h>
-#include <linux/bootmem.h>
-#include <linux/mmzone.h>
-#include <linux/highmem.h>
-#include <linux/initrd.h>
-#include <linux/nodemask.h>
-#include <linux/module.h>
-#include <linux/kexec.h>
-#include <linux/pfn.h>
-#include <linux/swap.h>
-
-#include <asm/e820.h>
-#include <asm/setup.h>
-#include <asm/mmzone.h>
-#include <bios_ebda.h>
-
-struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
-EXPORT_SYMBOL(node_data);
-bootmem_data_t node0_bdata;
-
-/*
- * numa interface - we expect the numa architecture specific code to have
- *                  populated the following initialisation.
- *
- * 1) node_online_map  - the map of all nodes configured (online) in the system
- * 2) node_start_pfn   - the starting page frame number for a node
- * 3) node_end_pfn     - the ending page fram number for a node
- */
-unsigned long node_start_pfn[MAX_NUMNODES] __read_mostly;
-unsigned long node_end_pfn[MAX_NUMNODES] __read_mostly;
-
-
-#ifdef CONFIG_DISCONTIGMEM
-/*
- * 4) physnode_map     - the mapping between a pfn and owning node
- * physnode_map keeps track of the physical memory layout of a generic
- * numa node on a 256Mb break (each element of the array will
- * represent 256Mb of memory and will be marked by the node id.  so,
- * if the first gig is on node 0, and the second gig is on node 1
- * physnode_map will contain:
- *
- *     physnode_map[0-3] = 0;
- *     physnode_map[4-7] = 1;
- *     physnode_map[8- ] = -1;
- */
-s8 physnode_map[MAX_ELEMENTS] __read_mostly = { [0 ... (MAX_ELEMENTS - 1)] = -1};
-EXPORT_SYMBOL(physnode_map);
-
-void memory_present(int nid, unsigned long start, unsigned long end)
-{
-	unsigned long pfn;
-
-	printk(KERN_INFO "Node: %d, start_pfn: %ld, end_pfn: %ld\n",
-			nid, start, end);
-	printk(KERN_DEBUG "  Setting physnode_map array to node %d for pfns:\n", nid);
-	printk(KERN_DEBUG "  ");
-	for (pfn = start; pfn < end; pfn += PAGES_PER_ELEMENT) {
-		physnode_map[pfn / PAGES_PER_ELEMENT] = nid;
-		printk("%ld ", pfn);
-	}
-	printk("\n");
-}
-
-unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
-					      unsigned long end_pfn)
-{
-	unsigned long nr_pages = end_pfn - start_pfn;
-
-	if (!nr_pages)
-		return 0;
-
-	return (nr_pages + 1) * sizeof(struct page);
-}
-#endif
-
-extern unsigned long find_max_low_pfn(void);
-extern void add_one_highpage_init(struct page *, int, int);
-extern unsigned long highend_pfn, highstart_pfn;
-
-#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
-
-unsigned long node_remap_start_pfn[MAX_NUMNODES];
-unsigned long node_remap_size[MAX_NUMNODES];
-unsigned long node_remap_offset[MAX_NUMNODES];
-void *node_remap_start_vaddr[MAX_NUMNODES];
-void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
-
-void *node_remap_end_vaddr[MAX_NUMNODES];
-void *node_remap_alloc_vaddr[MAX_NUMNODES];
-static unsigned long kva_start_pfn;
-static unsigned long kva_pages;
-/*
- * FLAT - support for basic PC memory model with discontig enabled, essentially
- *        a single node with all available processors in it with a flat
- *        memory map.
- */
-int __init get_memcfg_numa_flat(void)
-{
-	printk("NUMA - single node, flat memory mode\n");
-
-	/* Run the memory configuration and find the top of memory. */
-	find_max_pfn();
-	node_start_pfn[0] = 0;
-	node_end_pfn[0] = max_pfn;
-	memory_present(0, 0, max_pfn);
-
-        /* Indicate there is one node available. */
-	nodes_clear(node_online_map);
-	node_set_online(0);
-	return 1;
-}
-
-/*
- * Find the highest page frame number we have available for the node
- */
-static void __init find_max_pfn_node(int nid)
-{
-	if (node_end_pfn[nid] > max_pfn)
-		node_end_pfn[nid] = max_pfn;
-	/*
-	 * if a user has given mem=XXXX, then we need to make sure 
-	 * that the node _starts_ before that, too, not just ends
-	 */
-	if (node_start_pfn[nid] > max_pfn)
-		node_start_pfn[nid] = max_pfn;
-	BUG_ON(node_start_pfn[nid] > node_end_pfn[nid]);
-}
-
-/* 
- * Allocate memory for the pg_data_t for this node via a crude pre-bootmem
- * method.  For node zero take this from the bottom of memory, for
- * subsequent nodes place them at node_remap_start_vaddr which contains
- * node local data in physically node local memory.  See setup_memory()
- * for details.
- */
-static void __init allocate_pgdat(int nid)
-{
-	if (nid && node_has_online_mem(nid))
-		NODE_DATA(nid) = (pg_data_t *)node_remap_start_vaddr[nid];
-	else {
-		NODE_DATA(nid) = (pg_data_t *)(pfn_to_kaddr(min_low_pfn));
-		min_low_pfn += PFN_UP(sizeof(pg_data_t));
-	}
-}
-
-void *alloc_remap(int nid, unsigned long size)
-{
-	void *allocation = node_remap_alloc_vaddr[nid];
-
-	size = ALIGN(size, L1_CACHE_BYTES);
-
-	if (!allocation || (allocation + size) >= node_remap_end_vaddr[nid])
-		return 0;
-
-	node_remap_alloc_vaddr[nid] += size;
-	memset(allocation, 0, size);
-
-	return allocation;
-}
-
-void __init remap_numa_kva(void)
-{
-	void *vaddr;
-	unsigned long pfn;
-	int node;
-
-	for_each_online_node(node) {
-		for (pfn=0; pfn < node_remap_size[node]; pfn += PTRS_PER_PTE) {
-			vaddr = node_remap_start_vaddr[node]+(pfn<<PAGE_SHIFT);
-			set_pmd_pfn((ulong) vaddr, 
-				node_remap_start_pfn[node] + pfn, 
-				PAGE_KERNEL_LARGE);
-		}
-	}
-}
-
-static unsigned long calculate_numa_remap_pages(void)
-{
-	int nid;
-	unsigned long size, reserve_pages = 0;
-	unsigned long pfn;
-
-	for_each_online_node(nid) {
-		unsigned old_end_pfn = node_end_pfn[nid];
-
-		/*
-		 * The acpi/srat node info can show hot-add memroy zones
-		 * where memory could be added but not currently present.
-		 */
-		if (node_start_pfn[nid] > max_pfn)
-			continue;
-		if (node_end_pfn[nid] > max_pfn)
-			node_end_pfn[nid] = max_pfn;
-
-		/* ensure the remap includes space for the pgdat. */
-		size = node_remap_size[nid] + sizeof(pg_data_t);
-
-		/* convert size to large (pmd size) pages, rounding up */
-		size = (size + LARGE_PAGE_BYTES - 1) / LARGE_PAGE_BYTES;
-		/* now the roundup is correct, convert to PAGE_SIZE pages */
-		size = size * PTRS_PER_PTE;
-
-		/*
-		 * Validate the region we are allocating only contains valid
-		 * pages.
-		 */
-		for (pfn = node_end_pfn[nid] - size;
-		     pfn < node_end_pfn[nid]; pfn++)
-			if (!page_is_ram(pfn))
-				break;
-
-		if (pfn != node_end_pfn[nid])
-			size = 0;
-
-		printk("Reserving %ld pages of KVA for lmem_map of node %d\n",
-				size, nid);
-		node_remap_size[nid] = size;
-		node_remap_offset[nid] = reserve_pages;
-		reserve_pages += size;
-		printk("Shrinking node %d from %ld pages to %ld pages\n",
-			nid, node_end_pfn[nid], node_end_pfn[nid] - size);
-
-		if (node_end_pfn[nid] & (PTRS_PER_PTE-1)) {
-			/*
-			 * Align node_end_pfn[] and node_remap_start_pfn[] to
-			 * pmd boundary. remap_numa_kva will barf otherwise.
-			 */
-			printk("Shrinking node %d further by %ld pages for proper alignment\n",
-				nid, node_end_pfn[nid] & (PTRS_PER_PTE-1));
-			size +=  node_end_pfn[nid] & (PTRS_PER_PTE-1);
-		}
-
-		node_end_pfn[nid] -= size;
-		node_remap_start_pfn[nid] = node_end_pfn[nid];
-		shrink_active_range(nid, old_end_pfn, node_end_pfn[nid]);
-	}
-	printk("Reserving total of %ld pages for numa KVA remap\n",
-			reserve_pages);
-	return reserve_pages;
-}
-
-extern void setup_bootmem_allocator(void);
-unsigned long __init setup_memory(void)
-{
-	int nid;
-	unsigned long system_start_pfn, system_max_low_pfn;
-
-	/*
-	 * When mapping a NUMA machine we allocate the node_mem_map arrays
-	 * from node local memory.  They are then mapped directly into KVA
-	 * between zone normal and vmalloc space.  Calculate the size of
-	 * this space and use it to adjust the boundry between ZONE_NORMAL
-	 * and ZONE_HIGHMEM.
-	 */
-	find_max_pfn();
-	get_memcfg_numa();
-
-	kva_pages = calculate_numa_remap_pages();
-
-	/* partially used pages are not usable - thus round upwards */
-	system_start_pfn = min_low_pfn = PFN_UP(init_pg_tables_end);
-
-	kva_start_pfn = find_max_low_pfn() - kva_pages;
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	/* Numa kva area is below the initrd */
-	if (LOADER_TYPE && INITRD_START)
-		kva_start_pfn = PFN_DOWN(INITRD_START)  - kva_pages;
-#endif
-	kva_start_pfn -= kva_start_pfn & (PTRS_PER_PTE-1);
-
-	system_max_low_pfn = max_low_pfn = find_max_low_pfn();
-	printk("kva_start_pfn ~ %ld find_max_low_pfn() ~ %ld\n",
-		kva_start_pfn, max_low_pfn);
-	printk("max_pfn = %ld\n", max_pfn);
-#ifdef CONFIG_HIGHMEM
-	highstart_pfn = highend_pfn = max_pfn;
-	if (max_pfn > system_max_low_pfn)
-		highstart_pfn = system_max_low_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
-	num_physpages = system_max_low_pfn;
-	high_memory = (void *) __va(system_max_low_pfn * PAGE_SIZE - 1) + 1;
-#endif
-	printk(KERN_NOTICE "%ldMB LOWMEM available.\n",
-			pages_to_mb(system_max_low_pfn));
-	printk("min_low_pfn = %ld, max_low_pfn = %ld, highstart_pfn = %ld\n", 
-			min_low_pfn, max_low_pfn, highstart_pfn);
-
-	printk("Low memory ends at vaddr %08lx\n",
-			(ulong) pfn_to_kaddr(max_low_pfn));
-	for_each_online_node(nid) {
-		node_remap_start_vaddr[nid] = pfn_to_kaddr(
-				kva_start_pfn + node_remap_offset[nid]);
-		/* Init the node remap allocator */
-		node_remap_end_vaddr[nid] = node_remap_start_vaddr[nid] +
-			(node_remap_size[nid] * PAGE_SIZE);
-		node_remap_alloc_vaddr[nid] = node_remap_start_vaddr[nid] +
-			ALIGN(sizeof(pg_data_t), PAGE_SIZE);
-
-		allocate_pgdat(nid);
-		printk ("node %d will remap to vaddr %08lx - %08lx\n", nid,
-			(ulong) node_remap_start_vaddr[nid],
-			(ulong) pfn_to_kaddr(highstart_pfn
-			   + node_remap_offset[nid] + node_remap_size[nid]));
-	}
-	printk("High memory starts at vaddr %08lx\n",
-			(ulong) pfn_to_kaddr(highstart_pfn));
-	for_each_online_node(nid)
-		find_max_pfn_node(nid);
-
-	memset(NODE_DATA(0), 0, sizeof(struct pglist_data));
-	NODE_DATA(0)->bdata = &node0_bdata;
-	setup_bootmem_allocator();
-	return max_low_pfn;
-}
-
-void __init numa_kva_reserve(void)
-{
-	reserve_bootmem(PFN_PHYS(kva_start_pfn),PFN_PHYS(kva_pages));
-}
-
-void __init zone_sizes_init(void)
-{
-	int nid;
-	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
-
-	/* If SRAT has not registered memory, register it now */
-	if (find_max_pfn_with_active_regions() == 0) {
-		for_each_online_node(nid) {
-			if (node_has_online_mem(nid))
-				add_active_range(nid, node_start_pfn[nid],
-							node_end_pfn[nid]);
-		}
-	}
-
-	free_area_init_nodes(max_zone_pfns);
-	return;
-}
-
-void __init set_highmem_pages_init(int bad_ppro) 
-{
-#ifdef CONFIG_HIGHMEM
-	struct zone *zone;
-	struct page *page;
-
-	for_each_zone(zone) {
-		unsigned long node_pfn, zone_start_pfn, zone_end_pfn;
-
-		if (!is_highmem(zone))
-			continue;
-
-		zone_start_pfn = zone->zone_start_pfn;
-		zone_end_pfn = zone_start_pfn + zone->spanned_pages;
-
-		printk("Initializing %s for node %d (%08lx:%08lx)\n",
-				zone->name, zone_to_nid(zone),
-				zone_start_pfn, zone_end_pfn);
-
-		for (node_pfn = zone_start_pfn; node_pfn < zone_end_pfn; node_pfn++) {
-			if (!pfn_valid(node_pfn))
-				continue;
-			page = pfn_to_page(node_pfn);
-			add_one_highpage_init(page, node_pfn, bad_ppro);
-		}
-	}
-	totalram_pages += totalhigh_pages;
-#endif
-}
-
-#ifdef CONFIG_MEMORY_HOTPLUG
-int paddr_to_nid(u64 addr)
-{
-	int nid;
-	unsigned long pfn = PFN_DOWN(addr);
-
-	for_each_node(nid)
-		if (node_start_pfn[nid] <= pfn &&
-		    pfn < node_end_pfn[nid])
-			return nid;
-
-	return -1;
-}
-
-/*
- * This function is used to ask node id BEFORE memmap and mem_section's
- * initialization (pfn_to_nid() can't be used yet).
- * If _PXM is not defined on ACPI's DSDT, node id must be found by this.
- */
-int memory_add_physaddr_to_nid(u64 addr)
-{
-	int nid = paddr_to_nid(addr);
-	return (nid >= 0) ? nid : 0;
-}
-
-EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
-#endif
diff --git a/arch/i386/mm/extable_32.c b/arch/i386/mm/extable_32.c
deleted file mode 100644
index 0ce4f22a263..00000000000
--- a/arch/i386/mm/extable_32.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * linux/arch/i386/mm/extable.c
- */
-
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <asm/uaccess.h>
-
-int fixup_exception(struct pt_regs *regs)
-{
-	const struct exception_table_entry *fixup;
-
-#ifdef CONFIG_PNPBIOS
-	if (unlikely(SEGMENT_IS_PNP_CODE(regs->xcs)))
-	{
-		extern u32 pnp_bios_fault_eip, pnp_bios_fault_esp;
-		extern u32 pnp_bios_is_utter_crap;
-		pnp_bios_is_utter_crap = 1;
-		printk(KERN_CRIT "PNPBIOS fault.. attempting recovery.\n");
-		__asm__ volatile(
-			"movl %0, %%esp\n\t"
-			"jmp *%1\n\t"
-			: : "g" (pnp_bios_fault_esp), "g" (pnp_bios_fault_eip));
-		panic("do_trap: can't hit this");
-	}
-#endif
-
-	fixup = search_exception_tables(regs->eip);
-	if (fixup) {
-		regs->eip = fixup->fixup;
-		return 1;
-	}
-
-	return 0;
-}
diff --git a/arch/i386/mm/fault_32.c b/arch/i386/mm/fault_32.c
deleted file mode 100644
index fcb38e7f354..00000000000
--- a/arch/i386/mm/fault_32.c
+++ /dev/null
@@ -1,657 +0,0 @@
-/*
- *  linux/arch/i386/mm/fault.c
- *
- *  Copyright (C) 1995  Linus Torvalds
- */
-
-#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/smp.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/tty.h>
-#include <linux/vt_kern.h>		/* For unblank_screen() */
-#include <linux/highmem.h>
-#include <linux/bootmem.h>		/* for max_low_pfn */
-#include <linux/vmalloc.h>
-#include <linux/module.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/kdebug.h>
-
-#include <asm/system.h>
-#include <asm/desc.h>
-#include <asm/segment.h>
-
-extern void die(const char *,struct pt_regs *,long);
-
-static ATOMIC_NOTIFIER_HEAD(notify_page_fault_chain);
-
-int register_page_fault_notifier(struct notifier_block *nb)
-{
-	vmalloc_sync_all();
-	return atomic_notifier_chain_register(&notify_page_fault_chain, nb);
-}
-EXPORT_SYMBOL_GPL(register_page_fault_notifier);
-
-int unregister_page_fault_notifier(struct notifier_block *nb)
-{
-	return atomic_notifier_chain_unregister(&notify_page_fault_chain, nb);
-}
-EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);
-
-static inline int notify_page_fault(struct pt_regs *regs, long err)
-{
-	struct die_args args = {
-		.regs = regs,
-		.str = "page fault",
-		.err = err,
-		.trapnr = 14,
-		.signr = SIGSEGV
-	};
-	return atomic_notifier_call_chain(&notify_page_fault_chain,
-	                                  DIE_PAGE_FAULT, &args);
-}
-
-/*
- * Return EIP plus the CS segment base.  The segment limit is also
- * adjusted, clamped to the kernel/user address space (whichever is
- * appropriate), and returned in *eip_limit.
- *
- * The segment is checked, because it might have been changed by another
- * task between the original faulting instruction and here.
- *
- * If CS is no longer a valid code segment, or if EIP is beyond the
- * limit, or if it is a kernel address when CS is not a kernel segment,
- * then the returned value will be greater than *eip_limit.
- * 
- * This is slow, but is very rarely executed.
- */
-static inline unsigned long get_segment_eip(struct pt_regs *regs,
-					    unsigned long *eip_limit)
-{
-	unsigned long eip = regs->eip;
-	unsigned seg = regs->xcs & 0xffff;
-	u32 seg_ar, seg_limit, base, *desc;
-
-	/* Unlikely, but must come before segment checks. */
-	if (unlikely(regs->eflags & VM_MASK)) {
-		base = seg << 4;
-		*eip_limit = base + 0xffff;
-		return base + (eip & 0xffff);
-	}
-
-	/* The standard kernel/user address space limit. */
-	*eip_limit = user_mode(regs) ? USER_DS.seg : KERNEL_DS.seg;
-	
-	/* By far the most common cases. */
-	if (likely(SEGMENT_IS_FLAT_CODE(seg)))
-		return eip;
-
-	/* Check the segment exists, is within the current LDT/GDT size,
-	   that kernel/user (ring 0..3) has the appropriate privilege,
-	   that it's a code segment, and get the limit. */
-	__asm__ ("larl %3,%0; lsll %3,%1"
-		 : "=&r" (seg_ar), "=r" (seg_limit) : "0" (0), "rm" (seg));
-	if ((~seg_ar & 0x9800) || eip > seg_limit) {
-		*eip_limit = 0;
-		return 1;	 /* So that returned eip > *eip_limit. */
-	}
-
-	/* Get the GDT/LDT descriptor base. 
-	   When you look for races in this code remember that
-	   LDT and other horrors are only used in user space. */
-	if (seg & (1<<2)) {
-		/* Must lock the LDT while reading it. */
-		down(&current->mm->context.sem);
-		desc = current->mm->context.ldt;
-		desc = (void *)desc + (seg & ~7);
-	} else {
-		/* Must disable preemption while reading the GDT. */
- 		desc = (u32 *)get_cpu_gdt_table(get_cpu());
-		desc = (void *)desc + (seg & ~7);
-	}
-
-	/* Decode the code segment base from the descriptor */
-	base = get_desc_base((unsigned long *)desc);
-
-	if (seg & (1<<2)) { 
-		up(&current->mm->context.sem);
-	} else
-		put_cpu();
-
-	/* Adjust EIP and segment limit, and clamp at the kernel limit.
-	   It's legitimate for segments to wrap at 0xffffffff. */
-	seg_limit += base;
-	if (seg_limit < *eip_limit && seg_limit >= base)
-		*eip_limit = seg_limit;
-	return eip + base;
-}
-
-/* 
- * Sometimes AMD Athlon/Opteron CPUs report invalid exceptions on prefetch.
- * Check that here and ignore it.
- */
-static int __is_prefetch(struct pt_regs *regs, unsigned long addr)
-{ 
-	unsigned long limit;
-	unsigned char *instr = (unsigned char *)get_segment_eip (regs, &limit);
-	int scan_more = 1;
-	int prefetch = 0; 
-	int i;
-
-	for (i = 0; scan_more && i < 15; i++) { 
-		unsigned char opcode;
-		unsigned char instr_hi;
-		unsigned char instr_lo;
-
-		if (instr > (unsigned char *)limit)
-			break;
-		if (probe_kernel_address(instr, opcode))
-			break; 
-
-		instr_hi = opcode & 0xf0; 
-		instr_lo = opcode & 0x0f; 
-		instr++;
-
-		switch (instr_hi) { 
-		case 0x20:
-		case 0x30:
-			/* Values 0x26,0x2E,0x36,0x3E are valid x86 prefixes. */
-			scan_more = ((instr_lo & 7) == 0x6);
-			break;
-			
-		case 0x60:
-			/* 0x64 thru 0x67 are valid prefixes in all modes. */
-			scan_more = (instr_lo & 0xC) == 0x4;
-			break;		
-		case 0xF0:
-			/* 0xF0, 0xF2, and 0xF3 are valid prefixes */
-			scan_more = !instr_lo || (instr_lo>>1) == 1;
-			break;			
-		case 0x00:
-			/* Prefetch instruction is 0x0F0D or 0x0F18 */
-			scan_more = 0;
-			if (instr > (unsigned char *)limit)
-				break;
-			if (probe_kernel_address(instr, opcode))
-				break;
-			prefetch = (instr_lo == 0xF) &&
-				(opcode == 0x0D || opcode == 0x18);
-			break;			
-		default:
-			scan_more = 0;
-			break;
-		} 
-	}
-	return prefetch;
-}
-
-static inline int is_prefetch(struct pt_regs *regs, unsigned long addr,
-			      unsigned long error_code)
-{
-	if (unlikely(boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
-		     boot_cpu_data.x86 >= 6)) {
-		/* Catch an obscure case of prefetch inside an NX page. */
-		if (nx_enabled && (error_code & 16))
-			return 0;
-		return __is_prefetch(regs, addr);
-	}
-	return 0;
-} 
-
-static noinline void force_sig_info_fault(int si_signo, int si_code,
-	unsigned long address, struct task_struct *tsk)
-{
-	siginfo_t info;
-
-	info.si_signo = si_signo;
-	info.si_errno = 0;
-	info.si_code = si_code;
-	info.si_addr = (void __user *)address;
-	force_sig_info(si_signo, &info, tsk);
-}
-
-fastcall void do_invalid_op(struct pt_regs *, unsigned long);
-
-static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
-{
-	unsigned index = pgd_index(address);
-	pgd_t *pgd_k;
-	pud_t *pud, *pud_k;
-	pmd_t *pmd, *pmd_k;
-
-	pgd += index;
-	pgd_k = init_mm.pgd + index;
-
-	if (!pgd_present(*pgd_k))
-		return NULL;
-
-	/*
-	 * set_pgd(pgd, *pgd_k); here would be useless on PAE
-	 * and redundant with the set_pmd() on non-PAE. As would
-	 * set_pud.
-	 */
-
-	pud = pud_offset(pgd, address);
-	pud_k = pud_offset(pgd_k, address);
-	if (!pud_present(*pud_k))
-		return NULL;
-
-	pmd = pmd_offset(pud, address);
-	pmd_k = pmd_offset(pud_k, address);
-	if (!pmd_present(*pmd_k))
-		return NULL;
-	if (!pmd_present(*pmd)) {
-		set_pmd(pmd, *pmd_k);
-		arch_flush_lazy_mmu_mode();
-	} else
-		BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k));
-	return pmd_k;
-}
-
-/*
- * Handle a fault on the vmalloc or module mapping area
- *
- * This assumes no large pages in there.
- */
-static inline int vmalloc_fault(unsigned long address)
-{
-	unsigned long pgd_paddr;
-	pmd_t *pmd_k;
-	pte_t *pte_k;
-	/*
-	 * Synchronize this task's top level page-table
-	 * with the 'reference' page table.
-	 *
-	 * Do _not_ use "current" here. We might be inside
-	 * an interrupt in the middle of a task switch..
-	 */
-	pgd_paddr = read_cr3();
-	pmd_k = vmalloc_sync_one(__va(pgd_paddr), address);
-	if (!pmd_k)
-		return -1;
-	pte_k = pte_offset_kernel(pmd_k, address);
-	if (!pte_present(*pte_k))
-		return -1;
-	return 0;
-}
-
-int show_unhandled_signals = 1;
-
-/*
- * This routine handles page faults.  It determines the address,
- * and the problem, and then passes it off to one of the appropriate
- * routines.
- *
- * error_code:
- *	bit 0 == 0 means no page found, 1 means protection fault
- *	bit 1 == 0 means read, 1 means write
- *	bit 2 == 0 means kernel, 1 means user-mode
- *	bit 3 == 1 means use of reserved bit detected
- *	bit 4 == 1 means fault was an instruction fetch
- */
-fastcall void __kprobes do_page_fault(struct pt_regs *regs,
-				      unsigned long error_code)
-{
-	struct task_struct *tsk;
-	struct mm_struct *mm;
-	struct vm_area_struct * vma;
-	unsigned long address;
-	int write, si_code;
-	int fault;
-
-	/* get the address */
-        address = read_cr2();
-
-	tsk = current;
-
-	si_code = SEGV_MAPERR;
-
-	/*
-	 * We fault-in kernel-space virtual memory on-demand. The
-	 * 'reference' page table is init_mm.pgd.
-	 *
-	 * NOTE! We MUST NOT take any locks for this case. We may
-	 * be in an interrupt or a critical region, and should
-	 * only copy the information from the master page table,
-	 * nothing more.
-	 *
-	 * This verifies that the fault happens in kernel space
-	 * (error_code & 4) == 0, and that the fault was not a
-	 * protection error (error_code & 9) == 0.
-	 */
-	if (unlikely(address >= TASK_SIZE)) {
-		if (!(error_code & 0x0000000d) && vmalloc_fault(address) >= 0)
-			return;
-		if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
-			return;
-		/*
-		 * Don't take the mm semaphore here. If we fixup a prefetch
-		 * fault we could otherwise deadlock.
-		 */
-		goto bad_area_nosemaphore;
-	}
-
-	if (notify_page_fault(regs, error_code) == NOTIFY_STOP)
-		return;
-
-	/* It's safe to allow irq's after cr2 has been saved and the vmalloc
-	   fault has been handled. */
-	if (regs->eflags & (X86_EFLAGS_IF|VM_MASK))
-		local_irq_enable();
-
-	mm = tsk->mm;
-
-	/*
-	 * If we're in an interrupt, have no user context or are running in an
-	 * atomic region then we must not take the fault..
-	 */
-	if (in_atomic() || !mm)
-		goto bad_area_nosemaphore;
-
-	/* When running in the kernel we expect faults to occur only to
-	 * addresses in user space.  All other faults represent errors in the
-	 * kernel and should generate an OOPS.  Unfortunatly, in the case of an
-	 * erroneous fault occurring in a code path which already holds mmap_sem
-	 * we will deadlock attempting to validate the fault against the
-	 * address space.  Luckily the kernel only validly references user
-	 * space from well defined areas of code, which are listed in the
-	 * exceptions table.
-	 *
-	 * As the vast majority of faults will be valid we will only perform
-	 * the source reference check when there is a possibilty of a deadlock.
-	 * Attempt to lock the address space, if we cannot we then validate the
-	 * source.  If this is invalid we can skip the address space check,
-	 * thus avoiding the deadlock.
-	 */
-	if (!down_read_trylock(&mm->mmap_sem)) {
-		if ((error_code & 4) == 0 &&
-		    !search_exception_tables(regs->eip))
-			goto bad_area_nosemaphore;
-		down_read(&mm->mmap_sem);
-	}
-
-	vma = find_vma(mm, address);
-	if (!vma)
-		goto bad_area;
-	if (vma->vm_start <= address)
-		goto good_area;
-	if (!(vma->vm_flags & VM_GROWSDOWN))
-		goto bad_area;
-	if (error_code & 4) {
-		/*
-		 * Accessing the stack below %esp is always a bug.
-		 * The large c