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Eric W. Biederman5234f5e2005-06-25 14:58:02 -07001#ifndef _X86_64_KEXEC_H
2#define _X86_64_KEXEC_H
3
Magnus Damm4bfaaef2006-09-26 10:52:38 +02004#define PA_CONTROL_PAGE 0
5#define VA_CONTROL_PAGE 1
6#define PA_PGD 2
7#define VA_PGD 3
8#define PA_PUD_0 4
9#define VA_PUD_0 5
10#define PA_PMD_0 6
11#define VA_PMD_0 7
12#define PA_PTE_0 8
13#define VA_PTE_0 9
14#define PA_PUD_1 10
15#define VA_PUD_1 11
16#define PA_PMD_1 12
17#define VA_PMD_1 13
18#define PA_PTE_1 14
19#define VA_PTE_1 15
20#define PA_TABLE_PAGE 16
21#define PAGES_NR 17
22
23#ifndef __ASSEMBLY__
24
Fernando Luis Vazquez Cao2c5d81a2006-02-03 03:04:39 -080025#include <linux/string.h>
26
Eric W. Biederman5234f5e2005-06-25 14:58:02 -070027#include <asm/page.h>
Vivek Goyalec9ce0d2006-01-09 20:51:49 -080028#include <asm/ptrace.h>
Eric W. Biederman5234f5e2005-06-25 14:58:02 -070029
30/*
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.
34 *
35 * So far x86_64 is limited to 40 physical address bits.
36 */
37
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)
44
45/* Allocate one page for the pdp and the second for the code */
46#define KEXEC_CONTROL_CODE_SIZE (4096UL + 4096UL)
47
48/* The native architecture */
49#define KEXEC_ARCH KEXEC_ARCH_X86_64
50
Vivek Goyalec9ce0d2006-01-09 20:51:49 -080051/*
52 * Saving the registers of the cpu on which panic occured in
53 * crash_kexec to save a valid sp. The registers of other cpus
54 * will be saved in machine_crash_shutdown while shooting down them.
55 */
56
57static inline void crash_setup_regs(struct pt_regs *newregs,
58 struct pt_regs *oldregs)
59{
60 if (oldregs)
61 memcpy(newregs, oldregs, sizeof(*newregs));
62 else {
63 __asm__ __volatile__("movq %%rbx,%0" : "=m"(newregs->rbx));
64 __asm__ __volatile__("movq %%rcx,%0" : "=m"(newregs->rcx));
65 __asm__ __volatile__("movq %%rdx,%0" : "=m"(newregs->rdx));
66 __asm__ __volatile__("movq %%rsi,%0" : "=m"(newregs->rsi));
67 __asm__ __volatile__("movq %%rdi,%0" : "=m"(newregs->rdi));
68 __asm__ __volatile__("movq %%rbp,%0" : "=m"(newregs->rbp));
69 __asm__ __volatile__("movq %%rax,%0" : "=m"(newregs->rax));
70 __asm__ __volatile__("movq %%rsp,%0" : "=m"(newregs->rsp));
71 __asm__ __volatile__("movq %%r8,%0" : "=m"(newregs->r8));
72 __asm__ __volatile__("movq %%r9,%0" : "=m"(newregs->r9));
73 __asm__ __volatile__("movq %%r10,%0" : "=m"(newregs->r10));
74 __asm__ __volatile__("movq %%r11,%0" : "=m"(newregs->r11));
75 __asm__ __volatile__("movq %%r12,%0" : "=m"(newregs->r12));
76 __asm__ __volatile__("movq %%r13,%0" : "=m"(newregs->r13));
77 __asm__ __volatile__("movq %%r14,%0" : "=m"(newregs->r14));
78 __asm__ __volatile__("movq %%r15,%0" : "=m"(newregs->r15));
79 __asm__ __volatile__("movl %%ss, %%eax;" :"=a"(newregs->ss));
80 __asm__ __volatile__("movl %%cs, %%eax;" :"=a"(newregs->cs));
81 __asm__ __volatile__("pushfq; popq %0" :"=m"(newregs->eflags));
82
83 newregs->rip = (unsigned long)current_text_addr();
84 }
85}
Magnus Damm4bfaaef2006-09-26 10:52:38 +020086
87NORET_TYPE void
88relocate_kernel(unsigned long indirection_page,
89 unsigned long page_list,
90 unsigned long start_address) ATTRIB_NORET;
91
92#endif /* __ASSEMBLY__ */
93
Eric W. Biederman5234f5e2005-06-25 14:58:02 -070094#endif /* _X86_64_KEXEC_H */