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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef _ASM_POWERPC_KEXEC_H
2#define _ASM_POWERPC_KEXEC_H
3#ifdef __KERNEL__
4
5/*
6 * Maximum page that is mapped directly into kernel memory.
7 * XXX: Since we copy virt we can use any page we allocate
8 */
9#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
10
11/*
12 * Maximum address we can reach in physical address mode.
13 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
14 */
15#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
16
17/* Maximum address we can use for the control code buffer */
18#ifdef __powerpc64__
19#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
20#else
21/* TASK_SIZE, probably left over from use_mm ?? */
22#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
23#endif
24
25#define KEXEC_CONTROL_CODE_SIZE 4096
26
27/* The native architecture */
28#ifdef __powerpc64__
29#define KEXEC_ARCH KEXEC_ARCH_PPC64
30#else
31#define KEXEC_ARCH KEXEC_ARCH_PPC
32#endif
33
34#ifdef CONFIG_KEXEC
35
36#ifndef __ASSEMBLY__
37#ifdef __powerpc64__
38/*
39 * This function is responsible for capturing register states if coming
40 * via panic or invoking dump using sysrq-trigger.
41 */
42static inline void crash_setup_regs(struct pt_regs *newregs,
43 struct pt_regs *oldregs)
44{
45 if (oldregs)
46 memcpy(newregs, oldregs, sizeof(*newregs));
47 else {
48 /* FIXME Merge this with xmon_save_regs ?? */
49 unsigned long tmp1, tmp2;
50 __asm__ __volatile__ (
51 "std 0,0(%2)\n"
52 "std 1,8(%2)\n"
53 "std 2,16(%2)\n"
54 "std 3,24(%2)\n"
55 "std 4,32(%2)\n"
56 "std 5,40(%2)\n"
57 "std 6,48(%2)\n"
58 "std 7,56(%2)\n"
59 "std 8,64(%2)\n"
60 "std 9,72(%2)\n"
61 "std 10,80(%2)\n"
62 "std 11,88(%2)\n"
63 "std 12,96(%2)\n"
64 "std 13,104(%2)\n"
65 "std 14,112(%2)\n"
66 "std 15,120(%2)\n"
67 "std 16,128(%2)\n"
68 "std 17,136(%2)\n"
69 "std 18,144(%2)\n"
70 "std 19,152(%2)\n"
71 "std 20,160(%2)\n"
72 "std 21,168(%2)\n"
73 "std 22,176(%2)\n"
74 "std 23,184(%2)\n"
75 "std 24,192(%2)\n"
76 "std 25,200(%2)\n"
77 "std 26,208(%2)\n"
78 "std 27,216(%2)\n"
79 "std 28,224(%2)\n"
80 "std 29,232(%2)\n"
81 "std 30,240(%2)\n"
82 "std 31,248(%2)\n"
83 "mfmsr %0\n"
84 "std %0, 264(%2)\n"
85 "mfctr %0\n"
86 "std %0, 280(%2)\n"
87 "mflr %0\n"
88 "std %0, 288(%2)\n"
89 "bl 1f\n"
90 "1: mflr %1\n"
91 "std %1, 256(%2)\n"
92 "mtlr %0\n"
93 "mfxer %0\n"
94 "std %0, 296(%2)\n"
95 : "=&r" (tmp1), "=&r" (tmp2)
96 : "b" (newregs));
97 }
98}
99#else
100/*
101 * Provide a dummy definition to avoid build failures. Will remain
102 * empty till crash dump support is enabled.
103 */
104static inline void crash_setup_regs(struct pt_regs *newregs,
105 struct pt_regs *oldregs) { }
106#endif /* !__powerpc64 __ */
107
108#define MAX_NOTE_BYTES 1024
109
110#ifdef __powerpc64__
111extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
112 master to copy new code to 0 */
113extern void __init kexec_setup(void);
114extern int crashing_cpu;
115extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
116#endif /* __powerpc64 __ */
117
118struct kimage;
119struct pt_regs;
120extern void default_machine_kexec(struct kimage *image);
121extern int default_machine_kexec_prepare(struct kimage *image);
122extern void default_machine_crash_shutdown(struct pt_regs *regs);
123
124extern void machine_kexec_simple(struct kimage *image);
125
126#endif /* ! __ASSEMBLY__ */
127#endif /* CONFIG_KEXEC */
128#endif /* __KERNEL__ */
129#endif /* _ASM_POWERPC_KEXEC_H */