Commit | Line | Data |
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e1df870d ME |
1 | #ifndef _ASM_POWERPC_KEXEC_H |
2 | #define _ASM_POWERPC_KEXEC_H | |
88ced031 | 3 | #ifdef __KERNEL__ |
e1df870d ME |
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 | ||
2babf5c2 | 34 | #ifndef __ASSEMBLY__ |
b6f35b49 | 35 | #include <linux/cpumask.h> |
2babf5c2 | 36 | |
cc532915 ME |
37 | #ifdef CONFIG_KEXEC |
38 | ||
8385a6a3 HM |
39 | #ifdef __powerpc64__ |
40 | /* | |
41 | * This function is responsible for capturing register states if coming | |
42 | * via panic or invoking dump using sysrq-trigger. | |
43 | */ | |
44 | static inline void crash_setup_regs(struct pt_regs *newregs, | |
45 | struct pt_regs *oldregs) | |
46 | { | |
47 | if (oldregs) | |
48 | memcpy(newregs, oldregs, sizeof(*newregs)); | |
49 | else { | |
50 | /* FIXME Merge this with xmon_save_regs ?? */ | |
51 | unsigned long tmp1, tmp2; | |
52 | __asm__ __volatile__ ( | |
53 | "std 0,0(%2)\n" | |
54 | "std 1,8(%2)\n" | |
55 | "std 2,16(%2)\n" | |
56 | "std 3,24(%2)\n" | |
57 | "std 4,32(%2)\n" | |
58 | "std 5,40(%2)\n" | |
59 | "std 6,48(%2)\n" | |
60 | "std 7,56(%2)\n" | |
61 | "std 8,64(%2)\n" | |
62 | "std 9,72(%2)\n" | |
63 | "std 10,80(%2)\n" | |
64 | "std 11,88(%2)\n" | |
65 | "std 12,96(%2)\n" | |
66 | "std 13,104(%2)\n" | |
67 | "std 14,112(%2)\n" | |
68 | "std 15,120(%2)\n" | |
69 | "std 16,128(%2)\n" | |
70 | "std 17,136(%2)\n" | |
71 | "std 18,144(%2)\n" | |
72 | "std 19,152(%2)\n" | |
73 | "std 20,160(%2)\n" | |
74 | "std 21,168(%2)\n" | |
75 | "std 22,176(%2)\n" | |
76 | "std 23,184(%2)\n" | |
77 | "std 24,192(%2)\n" | |
78 | "std 25,200(%2)\n" | |
79 | "std 26,208(%2)\n" | |
80 | "std 27,216(%2)\n" | |
81 | "std 28,224(%2)\n" | |
82 | "std 29,232(%2)\n" | |
83 | "std 30,240(%2)\n" | |
84 | "std 31,248(%2)\n" | |
85 | "mfmsr %0\n" | |
86 | "std %0, 264(%2)\n" | |
87 | "mfctr %0\n" | |
88 | "std %0, 280(%2)\n" | |
89 | "mflr %0\n" | |
90 | "std %0, 288(%2)\n" | |
91 | "bl 1f\n" | |
92 | "1: mflr %1\n" | |
93 | "std %1, 256(%2)\n" | |
94 | "mtlr %0\n" | |
95 | "mfxer %0\n" | |
96 | "std %0, 296(%2)\n" | |
97 | : "=&r" (tmp1), "=&r" (tmp2) | |
2ec5e3a8 MM |
98 | : "b" (newregs) |
99 | : "memory"); | |
8385a6a3 HM |
100 | } |
101 | } | |
102 | #else | |
103 | /* | |
104 | * Provide a dummy definition to avoid build failures. Will remain | |
105 | * empty till crash dump support is enabled. | |
106 | */ | |
107 | static inline void crash_setup_regs(struct pt_regs *newregs, | |
108 | struct pt_regs *oldregs) { } | |
109 | #endif /* !__powerpc64 __ */ | |
110 | ||
e1df870d ME |
111 | extern void kexec_smp_wait(void); /* get and clear naca physid, wait for |
112 | master to copy new code to 0 */ | |
cc532915 ME |
113 | extern int crashing_cpu; |
114 | extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); | |
c0ce7d08 DW |
115 | extern cpumask_t cpus_in_sr; |
116 | static inline int kexec_sr_activated(int cpu) | |
117 | { | |
118 | return cpu_isset(cpu,cpus_in_sr); | |
119 | } | |
e1df870d | 120 | |
3d1229d6 | 121 | struct kimage; |
cc532915 | 122 | struct pt_regs; |
3d1229d6 ME |
123 | extern void default_machine_kexec(struct kimage *image); |
124 | extern int default_machine_kexec_prepare(struct kimage *image); | |
cc532915 ME |
125 | extern void default_machine_crash_shutdown(struct pt_regs *regs); |
126 | ||
39931e41 | 127 | extern void machine_kexec_simple(struct kimage *image); |
c0ce7d08 | 128 | extern void crash_kexec_secondary(struct pt_regs *regs); |
2babf5c2 | 129 | extern int overlaps_crashkernel(unsigned long start, unsigned long size); |
35dd5432 | 130 | extern void reserve_crashkernel(void); |
2babf5c2 ME |
131 | |
132 | #else /* !CONFIG_KEXEC */ | |
c0ce7d08 DW |
133 | static inline int kexec_sr_activated(int cpu) { return 0; } |
134 | static inline void crash_kexec_secondary(struct pt_regs *regs) { } | |
2babf5c2 ME |
135 | |
136 | static inline int overlaps_crashkernel(unsigned long start, unsigned long size) | |
137 | { | |
138 | return 0; | |
139 | } | |
39931e41 | 140 | |
35dd5432 ME |
141 | static inline void reserve_crashkernel(void) { ; } |
142 | ||
8385a6a3 | 143 | #endif /* CONFIG_KEXEC */ |
2babf5c2 | 144 | #endif /* ! __ASSEMBLY__ */ |
88ced031 | 145 | #endif /* __KERNEL__ */ |
e1df870d | 146 | #endif /* _ASM_POWERPC_KEXEC_H */ |