1 #ifndef _X86_64_KEXEC_H
2 #define _X86_64_KEXEC_H
4 #define PA_CONTROL_PAGE 0
5 #define VA_CONTROL_PAGE 1
20 #define PA_TABLE_PAGE 16
25 #include <linux/string.h>
28 #include <asm/ptrace.h>
31 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
32 * I.e. Maximum page that is mapped directly into kernel memory,
33 * and kmap is not required.
35 * So far x86_64 is limited to 40 physical address bits.
38 /* Maximum physical address we can use pages from */
39 #define KEXEC_SOURCE_MEMORY_LIMIT (0xFFFFFFFFFFUL)
40 /* Maximum address we can reach in physical address mode */
41 #define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL)
42 /* Maximum address we can use for the control pages */
43 #define KEXEC_CONTROL_MEMORY_LIMIT (0xFFFFFFFFFFUL)
45 /* Allocate one page for the pdp and the second for the code */
46 #define KEXEC_CONTROL_CODE_SIZE (4096UL + 4096UL)
48 /* The native architecture */
49 #define KEXEC_ARCH KEXEC_ARCH_X86_64
51 #define MAX_NOTE_BYTES 1024
54 * Saving the registers of the cpu on which panic occured in
55 * crash_kexec to save a valid sp. The registers of other cpus
56 * will be saved in machine_crash_shutdown while shooting down them.
59 static inline void crash_setup_regs(struct pt_regs *newregs,
60 struct pt_regs *oldregs)
63 memcpy(newregs, oldregs, sizeof(*newregs));
65 __asm__ __volatile__("movq %%rbx,%0" : "=m"(newregs->rbx));
66 __asm__ __volatile__("movq %%rcx,%0" : "=m"(newregs->rcx));
67 __asm__ __volatile__("movq %%rdx,%0" : "=m"(newregs->rdx));
68 __asm__ __volatile__("movq %%rsi,%0" : "=m"(newregs->rsi));
69 __asm__ __volatile__("movq %%rdi,%0" : "=m"(newregs->rdi));
70 __asm__ __volatile__("movq %%rbp,%0" : "=m"(newregs->rbp));
71 __asm__ __volatile__("movq %%rax,%0" : "=m"(newregs->rax));
72 __asm__ __volatile__("movq %%rsp,%0" : "=m"(newregs->rsp));
73 __asm__ __volatile__("movq %%r8,%0" : "=m"(newregs->r8));
74 __asm__ __volatile__("movq %%r9,%0" : "=m"(newregs->r9));
75 __asm__ __volatile__("movq %%r10,%0" : "=m"(newregs->r10));
76 __asm__ __volatile__("movq %%r11,%0" : "=m"(newregs->r11));
77 __asm__ __volatile__("movq %%r12,%0" : "=m"(newregs->r12));
78 __asm__ __volatile__("movq %%r13,%0" : "=m"(newregs->r13));
79 __asm__ __volatile__("movq %%r14,%0" : "=m"(newregs->r14));
80 __asm__ __volatile__("movq %%r15,%0" : "=m"(newregs->r15));
81 __asm__ __volatile__("movl %%ss, %%eax;" :"=a"(newregs->ss));
82 __asm__ __volatile__("movl %%cs, %%eax;" :"=a"(newregs->cs));
83 __asm__ __volatile__("pushfq; popq %0" :"=m"(newregs->eflags));
85 newregs->rip = (unsigned long)current_text_addr();
90 relocate_kernel(unsigned long indirection_page,
91 unsigned long page_list,
92 unsigned long start_address) ATTRIB_NORET;
94 #endif /* __ASSEMBLY__ */
96 #endif /* _X86_64_KEXEC_H */