diff options
Diffstat (limited to 'arch/i386/kernel/machine_kexec_32.c')
| -rw-r--r-- | arch/i386/kernel/machine_kexec_32.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/arch/i386/kernel/machine_kexec_32.c b/arch/i386/kernel/machine_kexec_32.c deleted file mode 100644 index 91966bafb3d..00000000000 --- a/arch/i386/kernel/machine_kexec_32.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); |