Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fcaf15d788dc0c8354dbcf449e260cb303120b75
Commit:     fcaf15d788dc0c8354dbcf449e260cb303120b75
Parent:     deb8677148fef3aea11edd4e980f6eb9c564f3cd
Author:     Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Thu Oct 11 11:13:12 2007 +0200
Committer:  Thomas Gleixner <[EMAIL PROTECTED]>
CommitDate: Thu Oct 11 11:13:12 2007 +0200

    i386: prepare shared kernel/machine_kexec.c
    
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
 arch/i386/kernel/Makefile           |    2 +-
 arch/i386/kernel/machine_kexec.c    |  171 -----------------------------------
 arch/i386/kernel/machine_kexec_32.c |  171 +++++++++++++++++++++++++++++++++++
 3 files changed, 172 insertions(+), 172 deletions(-)

diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 6ecf97d..8d80220 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -25,7 +25,7 @@ obj-$(CONFIG_X86_MPPARSE)     += mpparse_32.o
 obj-$(CONFIG_X86_LOCAL_APIC)   += apic_32.o nmi_32.o
 obj-$(CONFIG_X86_IO_APIC)      += io_apic_32.o
 obj-$(CONFIG_X86_REBOOTFIXUPS) += reboot_fixups_32.o
-obj-$(CONFIG_KEXEC)            += machine_kexec.o relocate_kernel_32.o 
crash_32.o
+obj-$(CONFIG_KEXEC)            += machine_kexec_32.o relocate_kernel_32.o 
crash_32.o
 obj-$(CONFIG_CRASH_DUMP)       += crash_dump_32.o
 obj-$(CONFIG_X86_NUMAQ)                += numaq_32.o
 obj-$(CONFIG_X86_SUMMIT_NUMA)  += summit_32.o
diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c
deleted file mode 100644
index 91966ba..0000000
--- 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  <[EMAIL PROTECTED]>
- *
- * 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);
-}
-
-/* [EMAIL PROTECTED] 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);
diff --git a/arch/i386/kernel/machine_kexec_32.c 
b/arch/i386/kernel/machine_kexec_32.c
new file mode 100644
index 0000000..91966ba
--- /dev/null
+++ b/arch/i386/kernel/machine_kexec_32.c
@@ -0,0 +1,171 @@
+/*
+ * machine_kexec.c - handle transition of Linux booting another kernel
+ * Copyright (C) 2002-2005 Eric Biederman  <[EMAIL PROTECTED]>
+ *
+ * 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);
+}
+
+/* [EMAIL PROTECTED] 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);
-
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