fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-x86 / kexec_64.h
blob738e581b67f8f41e198bd87e49fdffcd1d1e4ae1
1 #ifndef _X86_64_KEXEC_H
2 #define _X86_64_KEXEC_H
4 #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
23 #ifndef __ASSEMBLY__
25 #include <linux/string.h>
27 #include <asm/page.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
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.
57 static inline void crash_setup_regs(struct pt_regs *newregs,
58 struct pt_regs *oldregs)
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));
83 newregs->rip = (unsigned long)current_text_addr();
87 NORET_TYPE void
88 relocate_kernel(unsigned long indirection_page,
89 unsigned long page_list,
90 unsigned long start_address) ATTRIB_NORET;
92 #endif /* __ASSEMBLY__ */
94 #endif /* _X86_64_KEXEC_H */