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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
Fernando Luis Vazquez Cao2c5d81a2006-02-03 03:04:39 -08004#include <linux/string.h>
5
Eric W. Biederman5234f5e2005-06-25 14:58:02 -07006#include <asm/page.h>
Vivek Goyalec9ce0d2006-01-09 20:51:49 -08007#include <asm/ptrace.h>
Eric W. Biederman5234f5e2005-06-25 14:58:02 -07008
9/*
10 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
11 * I.e. Maximum page that is mapped directly into kernel memory,
12 * and kmap is not required.
13 *
14 * So far x86_64 is limited to 40 physical address bits.
15 */
16
17/* Maximum physical address we can use pages from */
18#define KEXEC_SOURCE_MEMORY_LIMIT (0xFFFFFFFFFFUL)
19/* Maximum address we can reach in physical address mode */
20#define KEXEC_DESTINATION_MEMORY_LIMIT (0xFFFFFFFFFFUL)
21/* Maximum address we can use for the control pages */
22#define KEXEC_CONTROL_MEMORY_LIMIT (0xFFFFFFFFFFUL)
23
24/* Allocate one page for the pdp and the second for the code */
25#define KEXEC_CONTROL_CODE_SIZE (4096UL + 4096UL)
26
27/* The native architecture */
28#define KEXEC_ARCH KEXEC_ARCH_X86_64
29
Vivek Goyal625f1c822005-06-25 14:58:12 -070030#define MAX_NOTE_BYTES 1024
Vivek Goyal625f1c822005-06-25 14:58:12 -070031
Vivek Goyalec9ce0d2006-01-09 20:51:49 -080032/*
33 * Saving the registers of the cpu on which panic occured in
34 * crash_kexec to save a valid sp. The registers of other cpus
35 * will be saved in machine_crash_shutdown while shooting down them.
36 */
37
38static inline void crash_setup_regs(struct pt_regs *newregs,
39 struct pt_regs *oldregs)
40{
41 if (oldregs)
42 memcpy(newregs, oldregs, sizeof(*newregs));
43 else {
44 __asm__ __volatile__("movq %%rbx,%0" : "=m"(newregs->rbx));
45 __asm__ __volatile__("movq %%rcx,%0" : "=m"(newregs->rcx));
46 __asm__ __volatile__("movq %%rdx,%0" : "=m"(newregs->rdx));
47 __asm__ __volatile__("movq %%rsi,%0" : "=m"(newregs->rsi));
48 __asm__ __volatile__("movq %%rdi,%0" : "=m"(newregs->rdi));
49 __asm__ __volatile__("movq %%rbp,%0" : "=m"(newregs->rbp));
50 __asm__ __volatile__("movq %%rax,%0" : "=m"(newregs->rax));
51 __asm__ __volatile__("movq %%rsp,%0" : "=m"(newregs->rsp));
52 __asm__ __volatile__("movq %%r8,%0" : "=m"(newregs->r8));
53 __asm__ __volatile__("movq %%r9,%0" : "=m"(newregs->r9));
54 __asm__ __volatile__("movq %%r10,%0" : "=m"(newregs->r10));
55 __asm__ __volatile__("movq %%r11,%0" : "=m"(newregs->r11));
56 __asm__ __volatile__("movq %%r12,%0" : "=m"(newregs->r12));
57 __asm__ __volatile__("movq %%r13,%0" : "=m"(newregs->r13));
58 __asm__ __volatile__("movq %%r14,%0" : "=m"(newregs->r14));
59 __asm__ __volatile__("movq %%r15,%0" : "=m"(newregs->r15));
60 __asm__ __volatile__("movl %%ss, %%eax;" :"=a"(newregs->ss));
61 __asm__ __volatile__("movl %%cs, %%eax;" :"=a"(newregs->cs));
62 __asm__ __volatile__("pushfq; popq %0" :"=m"(newregs->eflags));
63
64 newregs->rip = (unsigned long)current_text_addr();
65 }
66}
Eric W. Biederman5234f5e2005-06-25 14:58:02 -070067#endif /* _X86_64_KEXEC_H */