Commit | Line | Data |
---|---|---|
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 | ||
163f6876 | 25 | #define KEXEC_CONTROL_PAGE_SIZE 4096 |
e1df870d ME |
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> |
73753313 | 36 | #include <asm/reg.h> |
2babf5c2 | 37 | |
aee10c61 AB |
38 | typedef void (*crash_shutdown_t)(void); |
39 | ||
cc532915 ME |
40 | #ifdef CONFIG_KEXEC |
41 | ||
8385a6a3 HM |
42 | /* |
43 | * This function is responsible for capturing register states if coming | |
44 | * via panic or invoking dump using sysrq-trigger. | |
45 | */ | |
46 | static inline void crash_setup_regs(struct pt_regs *newregs, | |
47 | struct pt_regs *oldregs) | |
48 | { | |
49 | if (oldregs) | |
50 | memcpy(newregs, oldregs, sizeof(*newregs)); | |
73753313 AV |
51 | else |
52 | ppc_save_regs(newregs); | |
73753313 | 53 | } |
8385a6a3 | 54 | |
e1df870d ME |
55 | extern void kexec_smp_wait(void); /* get and clear naca physid, wait for |
56 | master to copy new code to 0 */ | |
cc532915 ME |
57 | extern int crashing_cpu; |
58 | extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); | |
c0ce7d08 DW |
59 | extern cpumask_t cpus_in_sr; |
60 | static inline int kexec_sr_activated(int cpu) | |
61 | { | |
62 | return cpu_isset(cpu,cpus_in_sr); | |
63 | } | |
e1df870d | 64 | |
3d1229d6 | 65 | struct kimage; |
cc532915 | 66 | struct pt_regs; |
3d1229d6 ME |
67 | extern void default_machine_kexec(struct kimage *image); |
68 | extern int default_machine_kexec_prepare(struct kimage *image); | |
cc532915 | 69 | extern void default_machine_crash_shutdown(struct pt_regs *regs); |
496b010e MN |
70 | extern int crash_shutdown_register(crash_shutdown_t handler); |
71 | extern int crash_shutdown_unregister(crash_shutdown_t handler); | |
cc532915 | 72 | |
39931e41 | 73 | extern void machine_kexec_simple(struct kimage *image); |
c0ce7d08 | 74 | extern void crash_kexec_secondary(struct pt_regs *regs); |
2babf5c2 | 75 | extern int overlaps_crashkernel(unsigned long start, unsigned long size); |
35dd5432 | 76 | extern void reserve_crashkernel(void); |
2babf5c2 ME |
77 | |
78 | #else /* !CONFIG_KEXEC */ | |
c0ce7d08 DW |
79 | static inline int kexec_sr_activated(int cpu) { return 0; } |
80 | static inline void crash_kexec_secondary(struct pt_regs *regs) { } | |
2babf5c2 ME |
81 | |
82 | static inline int overlaps_crashkernel(unsigned long start, unsigned long size) | |
83 | { | |
84 | return 0; | |
85 | } | |
39931e41 | 86 | |
35dd5432 ME |
87 | static inline void reserve_crashkernel(void) { ; } |
88 | ||
aee10c61 AB |
89 | static inline int crash_shutdown_register(crash_shutdown_t handler) |
90 | { | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static inline int crash_shutdown_unregister(crash_shutdown_t handler) | |
95 | { | |
96 | return 0; | |
97 | } | |
98 | ||
8385a6a3 | 99 | #endif /* CONFIG_KEXEC */ |
2babf5c2 | 100 | #endif /* ! __ASSEMBLY__ */ |
88ced031 | 101 | #endif /* __KERNEL__ */ |
e1df870d | 102 | #endif /* _ASM_POWERPC_KEXEC_H */ |