1 files changed, 0 insertions, 231 deletions
diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c
deleted file mode 100644
index 89fab51e20f..00000000000
--- a/arch/x86_64/kernel/machine_kexec.c
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * machine_kexec.c - handle transition of Linux booting another kernel
- * Copyright (C) 2002-2005 Eric Biederman  <ebiederm@xmission.com>
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2.  See the file COPYING for more details.
- */
-
-#include <linux/mm.h>
-#include <linux/kexec.h>
-#include <linux/string.h>
-#include <linux/reboot.h>
-#include <asm/pgtable.h>
-#include <asm/tlbflush.h>
-#include <asm/mmu_context.h>
-#include <asm/io.h>
-
-static void init_level2_page(pmd_t *level2p, unsigned long addr)
-{
-	unsigned long end_addr;
-
-	addr &= PAGE_MASK;
-	end_addr = addr + PUD_SIZE;
-	while (addr < end_addr) {
-		set_pmd(level2p++, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC));
-		addr += PMD_SIZE;
-	}
-}
-
-static int init_level3_page(struct kimage *image, pud_t *level3p,
-				unsigned long addr, unsigned long last_addr)
-{
-	unsigned long end_addr;
-	int result;
-
-	result = 0;
-	addr &= PAGE_MASK;
-	end_addr = addr + PGDIR_SIZE;
-	while ((addr < last_addr) && (addr < end_addr)) {
-		struct page *page;
-		pmd_t *level2p;
-
-		page = kimage_alloc_control_pages(image, 0);
-		if (!page) {
-			result = -ENOMEM;
-			goto out;
-		}
-		level2p = (pmd_t *)page_address(page);
-		init_level2_page(level2p, addr);
-		set_pud(level3p++, __pud(__pa(level2p) | _KERNPG_TABLE));
-		addr += PUD_SIZE;
-	}
-	/* clear the unused entries */
-	while (addr < end_addr) {
-		pud_clear(level3p++);
-		addr += PUD_SIZE;
-	}
-out:
-	return result;
-}
-
-
-static int init_level4_page(struct kimage *image, pgd_t *level4p,
-				unsigned long addr, unsigned long last_addr)
-{
-	unsigned long end_addr;
-	int result;
-
-	result = 0;
-	addr &= PAGE_MASK;
-	end_addr = addr + (PTRS_PER_PGD * PGDIR_SIZE);
-	while ((addr < last_addr) && (addr < end_addr)) {
-		struct page *page;
-		pud_t *level3p;
-
-		page = kimage_alloc_control_pages(image, 0);
-		if (!page) {
-			result = -ENOMEM;
-			goto out;
-		}
-		level3p = (pud_t *)page_address(page);
-		result = init_level3_page(image, level3p, addr, last_addr);
-		if (result) {
-			goto out;
-		}
-		set_pgd(level4p++, __pgd(__pa(level3p) | _KERNPG_TABLE));
-		addr += PGDIR_SIZE;
-	}
-	/* clear the unused entries */
-	while (addr < end_addr) {
-		pgd_clear(level4p++);
-		addr += PGDIR_SIZE;
-	}
-out:
-	return result;
-}
-
-
-static int init_pgtable(struct kimage *image, unsigned long start_pgtable)
-{
-	pgd_t *level4p;
-	level4p = (pgd_t *)__va(start_pgtable);
- 	return init_level4_page(image, level4p, 0, end_pfn << PAGE_SHIFT);
-}
-
-static void set_idt(void *newidt, u16 limit)
-{
-	struct desc_ptr curidt;
-
-	/* x86-64 supports unaliged loads & stores */
-	curidt.size    = limit;
-	curidt.address = (unsigned long)newidt;
-
-	__asm__ __volatile__ (
-		"lidtq %0\n"
-		: : "m" (curidt)
-		);
-};
-
-
-static void set_gdt(void *newgdt, u16 limit)
-{
-	struct desc_ptr curgdt;
-
-	/* x86-64 supports unaligned loads & stores */
-	curgdt.size    = limit;
-	curgdt.address = (unsigned long)newgdt;
-
-	__asm__ __volatile__ (
-		"lgdtq %0\n"
-		: : "m" (curgdt)
-		);
-};
-
-static void load_segments(void)
-{
-	__asm__ __volatile__ (
-		"\tmovl %0,%%ds\n"
-		"\tmovl %0,%%es\n"
-		"\tmovl %0,%%ss\n"
-		"\tmovl %0,%%fs\n"
-		"\tmovl %0,%%gs\n"
-		: : "a" (__KERNEL_DS)
-		);
-}
-
-typedef NORET_TYPE void (*relocate_new_kernel_t)(unsigned long indirection_page,
-					unsigned long control_code_buffer,
-					unsigned long start_address,
-					unsigned long pgtable) ATTRIB_NORET;
-
-const extern unsigned char relocate_new_kernel[];
-const extern unsigned long relocate_new_kernel_size;
-
-int machine_kexec_prepare(struct kimage *image)
-{
-	unsigned long start_pgtable, control_code_buffer;
-	int result;
-
-	/* Calculate the offsets */
-	start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
-	control_code_buffer = start_pgtable + PAGE_SIZE;
-
-	/* Setup the identity mapped 64bit page table */
-	result = init_pgtable(image, start_pgtable);
-	if (result)
-		return result;
-
-	/* Place the code in the reboot code buffer */
-	memcpy(__va(control_code_buffer), relocate_new_kernel,
-						relocate_new_kernel_size);
-
-	return 0;
-}
-
-void machine_kexec_cleanup(struct kimage *image)
-{
-	return;
-}
-
-/*
- * Do not allocate memory (or fail in any way) in machine_kexec().
- * We are past the point of no return, committed to rebooting now.
- */
-NORET_TYPE void machine_kexec(struct kimage *image)
-{
-	unsigned long page_list;
-	unsigned long control_code_buffer;
-	unsigned long start_pgtable;
-	relocate_new_kernel_t rnk;
-
-	/* Interrupts aren't acceptable while we reboot */
-	local_irq_disable();
-
-	/* Calculate the offsets */
-	page_list = image->head;
-	start_pgtable = page_to_pfn(image->control_code_page) << PAGE_SHIFT;
-	control_code_buffer = start_pgtable + PAGE_SIZE;
-
-	/* Set the low half of the page table to my identity mapped
-	 * page table for kexec.  Leave the high half pointing at the
-	 * kernel pages.   Don't bother to flush the global pages
-	 * as that will happen when I fully switch to my identity mapped
-	 * page table anyway.
-	 */
-	memcpy(__va(read_cr3()), __va(start_pgtable), PAGE_SIZE/2);
-	__flush_tlb();
-
-
-	/* The segment registers are funny things, they are
-	 * automatically loaded from a table, in memory wherever you
-	 * set them to a specific selector, but this table is never
-	 * accessed again unless you set the segment to a different selector.
-	 *
-	 * The more common model are caches where the behide
-	 * the scenes work is done, but is also dropped at arbitrary
-	 * times.
-	 *
-	 * I take advantage of this here by force loading the
-	 * segments, before I zap the gdt with an invalid value.
-	 */
-	load_segments();
-	/* The gdt & idt are now invalid.
-	 * If you want to load them you must set up your own idt & gdt.
-	 */
-	set_gdt(phys_to_virt(0),0);
-	set_idt(phys_to_virt(0),0);
-	/* now call it */
-	rnk = (relocate_new_kernel_t) control_code_buffer;
-	(*rnk)(page_list, control_code_buffer, image->start, start_pgtable);
-}