+#ifndef _KEXEC_H
+#define _KEXEC_H
+
#ifdef CONFIG_X86_32
-# include "kexec_32.h"
+# define PA_CONTROL_PAGE 0
+# define VA_CONTROL_PAGE 1
+# define PA_PGD 2
+# define VA_PGD 3
+# define PA_PTE_0 4
+# define VA_PTE_0 5
+# define PA_PTE_1 6
+# define VA_PTE_1 7
+# ifdef CONFIG_X86_PAE
+# define PA_PMD_0 8
+# define VA_PMD_0 9
+# define PA_PMD_1 10
+# define VA_PMD_1 11
+# define PAGES_NR 12
+# else
+# define PAGES_NR 8
+# endif
#else
-# include "kexec_64.h"
+# define PA_CONTROL_PAGE 0
+# define VA_CONTROL_PAGE 1
+# define PA_PGD 2
+# define VA_PGD 3
+# define PA_PUD_0 4
+# define VA_PUD_0 5
+# define PA_PMD_0 6
+# define VA_PMD_0 7
+# define PA_PTE_0 8
+# define VA_PTE_0 9
+# define PA_PUD_1 10
+# define VA_PUD_1 11
+# define PA_PMD_1 12
+# define VA_PMD_1 13
+# define PA_PTE_1 14
+# define VA_PTE_1 15
+# define PA_TABLE_PAGE 16
+# define PAGES_NR 17
#endif
+
+#ifndef __ASSEMBLY__
+
+#include <linux/string.h>
+
+#include <asm/page.h>
+#include <asm/ptrace.h>
+
+/*
+ * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
+ * I.e. Maximum page that is mapped directly into kernel memory,
+ * and kmap is not required.
+ *
+ * So far x86_64 is limited to 40 physical address bits.
+ */
+#ifdef CONFIG_X86_32
+/* Maximum physical address we can use pages from */
+# define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
+/* Maximum address we can reach in physical address mode */
+# define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
+/* Maximum address we can use for the control code buffer */
+# define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
+
+# define KEXEC_CONTROL_CODE_SIZE 4096
+
+/* The native architecture */
+# define KEXEC_ARCH KEXEC_ARCH_386
+
+/* We can also handle crash dumps from 64 bit kernel. */
+# define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
+#else
+/* Maximum physical address we can use pages from */
+# define KEXEC_SOURCE_MEMORY_LIMIT (0xFFFFFFFFFFUL)
+/* Maximum address we can reach in physical address mode */
+# define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL)
+/* Maximum address we can use for the control pages */
+# define KEXEC_CONTROL_MEMORY_LIMIT (0xFFFFFFFFFFUL)
+
+/* Allocate one page for the pdp and the second for the code */
+# define KEXEC_CONTROL_CODE_SIZE (4096UL + 4096UL)
+
+/* The native architecture */
+# define KEXEC_ARCH KEXEC_ARCH_X86_64
+#endif
+
+/*
+ * CPU does not save ss and sp on stack if execution is already
+ * running in kernel mode at the time of NMI occurrence. This code
+ * fixes it.
+ */
+static inline void crash_fixup_ss_esp(struct pt_regs *newregs,
+ struct pt_regs *oldregs)
+{
+#ifdef CONFIG_X86_32
+ newregs->sp = (unsigned long)&(oldregs->sp);
+ asm volatile("xorl %%eax, %%eax\n\t"
+ "movw %%ss, %%ax\n\t"
+ :"=a"(newregs->ss));
+#endif
+}
+
+/*
+ * This function is responsible for capturing register states if coming
+ * via panic otherwise just fix up the ss and sp if coming via kernel
+ * mode exception.
+ */
+static inline void crash_setup_regs(struct pt_regs *newregs,
+ struct pt_regs *oldregs)
+{
+ if (oldregs) {
+ memcpy(newregs, oldregs, sizeof(*newregs));
+ crash_fixup_ss_esp(newregs, oldregs);
+ } else {
+#ifdef CONFIG_X86_32
+ asm volatile("movl %%ebx,%0" : "=m"(newregs->bx));
+ asm volatile("movl %%ecx,%0" : "=m"(newregs->cx));
+ asm volatile("movl %%edx,%0" : "=m"(newregs->dx));
+ asm volatile("movl %%esi,%0" : "=m"(newregs->si));
+ asm volatile("movl %%edi,%0" : "=m"(newregs->di));
+ asm volatile("movl %%ebp,%0" : "=m"(newregs->bp));
+ asm volatile("movl %%eax,%0" : "=m"(newregs->ax));
+ asm volatile("movl %%esp,%0" : "=m"(newregs->sp));
+ asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
+ asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
+ asm volatile("movl %%ds, %%eax;" :"=a"(newregs->ds));
+ asm volatile("movl %%es, %%eax;" :"=a"(newregs->es));
+ asm volatile("pushfl; popl %0" :"=m"(newregs->flags));
+#else
+ asm volatile("movq %%rbx,%0" : "=m"(newregs->bx));
+ asm volatile("movq %%rcx,%0" : "=m"(newregs->cx));
+ asm volatile("movq %%rdx,%0" : "=m"(newregs->dx));
+ asm volatile("movq %%rsi,%0" : "=m"(newregs->si));
+ asm volatile("movq %%rdi,%0" : "=m"(newregs->di));
+ asm volatile("movq %%rbp,%0" : "=m"(newregs->bp));
+ asm volatile("movq %%rax,%0" : "=m"(newregs->ax));
+ asm volatile("movq %%rsp,%0" : "=m"(newregs->sp));
+ asm volatile("movq %%r8,%0" : "=m"(newregs->r8));
+ asm volatile("movq %%r9,%0" : "=m"(newregs->r9));
+ asm volatile("movq %%r10,%0" : "=m"(newregs->r10));
+ asm volatile("movq %%r11,%0" : "=m"(newregs->r11));
+ asm volatile("movq %%r12,%0" : "=m"(newregs->r12));
+ asm volatile("movq %%r13,%0" : "=m"(newregs->r13));
+ asm volatile("movq %%r14,%0" : "=m"(newregs->r14));
+ asm volatile("movq %%r15,%0" : "=m"(newregs->r15));
+ asm volatile("movl %%ss, %%eax;" :"=a"(newregs->ss));
+ asm volatile("movl %%cs, %%eax;" :"=a"(newregs->cs));
+ asm volatile("pushfq; popq %0" :"=m"(newregs->flags));
+#endif
+ newregs->ip = (unsigned long)current_text_addr();
+ }
+}
+
+#ifdef CONFIG_X86_32
+asmlinkage NORET_TYPE void
+relocate_kernel(unsigned long indirection_page,
+ unsigned long control_page,
+ unsigned long start_address,
+ unsigned int has_pae) ATTRIB_NORET;
+#else
+NORET_TYPE void
+relocate_kernel(unsigned long indirection_page,
+ unsigned long page_list,
+ unsigned long start_address) ATTRIB_NORET;
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _KEXEC_H */
git.samba.org / sfrench / cifs-2.6.git / blobdiff