i386: prepare shared kernel/machine_kexec.c

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

1 files changed, 0 insertions, 171 deletions

diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c
deleted file mode 100644
index 91966bafb3d..00000000000
--- a/arch/i386/kernel/machine_kexec.c
+++ /dev/null
@@ -1,171 +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/delay.h>
-#include <linux/init.h>
-#include <asm/pgtable.h>
-#include <asm/pgalloc.h>
-#include <asm/tlbflush.h>
-#include <asm/mmu_context.h>
-#include <asm/io.h>
-#include <asm/apic.h>
-#include <asm/cpufeature.h>
-#include <asm/desc.h>
-#include <asm/system.h>
-
-#define PAGE_ALIGNED __attribute__ ((__aligned__(PAGE_SIZE)))
-static u32 kexec_pgd[1024] PAGE_ALIGNED;
-#ifdef CONFIG_X86_PAE
-static u32 kexec_pmd0[1024] PAGE_ALIGNED;
-static u32 kexec_pmd1[1024] PAGE_ALIGNED;
-#endif
-static u32 kexec_pte0[1024] PAGE_ALIGNED;
-static u32 kexec_pte1[1024] PAGE_ALIGNED;
-
-static void set_idt(void *newidt, __u16 limit)
-{
-	struct Xgt_desc_struct curidt;
-
-	/* ia32 supports unaliged loads & stores */
-	curidt.size    = limit;
-	curidt.address = (unsigned long)newidt;
-
-	load_idt(&curidt);
-};
-
-
-static void set_gdt(void *newgdt, __u16 limit)
-{
-	struct Xgt_desc_struct curgdt;
-
-	/* ia32 supports unaligned loads & stores */
-	curgdt.size    = limit;
-	curgdt.address = (unsigned long)newgdt;
-
-	load_gdt(&curgdt);
-};
-
-static void load_segments(void)
-{
-#define __STR(X) #X
-#define STR(X) __STR(X)
-
-	__asm__ __volatile__ (
-		"\tljmp $"STR(__KERNEL_CS)",$1f\n"
-		"\t1:\n"
-		"\tmovl $"STR(__KERNEL_DS)",%%eax\n"
-		"\tmovl %%eax,%%ds\n"
-		"\tmovl %%eax,%%es\n"
-		"\tmovl %%eax,%%fs\n"
-		"\tmovl %%eax,%%gs\n"
-		"\tmovl %%eax,%%ss\n"
-		::: "eax", "memory");
-#undef STR
-#undef __STR
-}
-
-/*
- * A architecture hook called to validate the
- * proposed image and prepare the control pages
- * as needed.  The pages for KEXEC_CONTROL_CODE_SIZE
- * have been allocated, but the segments have yet
- * been copied into the kernel.
- *
- * Do what every setup is needed on image and the
- * reboot code buffer to allow us to avoid allocations
- * later.
- *
- * Currently nothing.
- */
-int machine_kexec_prepare(struct kimage *image)
-{
-	return 0;
-}
-
-/*
- * Undo anything leftover by machine_kexec_prepare
- * when an image is freed.
- */
-void machine_kexec_cleanup(struct kimage *image)
-{
-}
-
-/*
- * 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[PAGES_NR];
-	void *control_page;
-
-	/* Interrupts aren't acceptable while we reboot */
-	local_irq_disable();
-
-	control_page = page_address(image->control_code_page);
-	memcpy(control_page, relocate_kernel, PAGE_SIZE);
-
-	page_list[PA_CONTROL_PAGE] = __pa(control_page);
-	page_list[VA_CONTROL_PAGE] = (unsigned long)relocate_kernel;
-	page_list[PA_PGD] = __pa(kexec_pgd);
-	page_list[VA_PGD] = (unsigned long)kexec_pgd;
-#ifdef CONFIG_X86_PAE
-	page_list[PA_PMD_0] = __pa(kexec_pmd0);
-	page_list[VA_PMD_0] = (unsigned long)kexec_pmd0;
-	page_list[PA_PMD_1] = __pa(kexec_pmd1);
-	page_list[VA_PMD_1] = (unsigned long)kexec_pmd1;
-#endif
-	page_list[PA_PTE_0] = __pa(kexec_pte0);
-	page_list[VA_PTE_0] = (unsigned long)kexec_pte0;
-	page_list[PA_PTE_1] = __pa(kexec_pte1);
-	page_list[VA_PTE_1] = (unsigned long)kexec_pte1;
-
-	/* The segment registers are funny things, they have both a
-	 * visible and an invisible part.  Whenever the visible part is
-	 * set to a specific selector, the invisible part is loaded
-	 * with from a table in memory.  At no other time is the
-	 * descriptor table in memory accessed.
-	 *
-	 * 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 */
-	relocate_kernel((unsigned long)image->head, (unsigned long)page_list,
-			image->start, cpu_has_pae);
-}
-
-/* crashkernel=size@addr specifies the location to reserve for
- * a crash kernel.  By reserving this memory we guarantee
- * that linux never sets it up as a DMA target.
- * Useful for holding code to do something appropriate
- * after a kernel panic.
- */
-static int __init parse_crashkernel(char *arg)
-{
-	unsigned long size, base;
-	size = memparse(arg, &arg);
-	if (*arg == '@') {
-		base = memparse(arg+1, &arg);
-		/* FIXME: Do I want a sanity check
-		 * to validate the memory range?
-		 */
-		crashk_res.start = base;
-		crashk_res.end   = base + size - 1;
-	}
-	return 0;
-}
-early_param("crashkernel", parse_crashkernel);