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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 | 4 | |
b3df895a SAS |
5 | #ifdef CONFIG_FSL_BOOKE |
6 | ||
7 | /* | |
8 | * On FSL-BookE we setup a 1:1 mapping which covers the first 2GiB of memory | |
9 | * and therefore we can only deal with memory within this range | |
10 | */ | |
23dcab8f KG |
11 | #define KEXEC_SOURCE_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) |
12 | #define KEXEC_DESTINATION_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) | |
13 | #define KEXEC_CONTROL_MEMORY_LIMIT (2 * 1024 * 1024 * 1024UL - 1) | |
b3df895a SAS |
14 | |
15 | #else | |
16 | ||
e1df870d ME |
17 | /* |
18 | * Maximum page that is mapped directly into kernel memory. | |
19 | * XXX: Since we copy virt we can use any page we allocate | |
20 | */ | |
21 | #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) | |
22 | ||
23 | /* | |
24 | * Maximum address we can reach in physical address mode. | |
25 | * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR. | |
26 | */ | |
27 | #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) | |
28 | ||
29 | /* Maximum address we can use for the control code buffer */ | |
30 | #ifdef __powerpc64__ | |
31 | #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) | |
32 | #else | |
33 | /* TASK_SIZE, probably left over from use_mm ?? */ | |
34 | #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE | |
35 | #endif | |
b3df895a | 36 | #endif |
e1df870d | 37 | |
163f6876 | 38 | #define KEXEC_CONTROL_PAGE_SIZE 4096 |
e1df870d ME |
39 | |
40 | /* The native architecture */ | |
41 | #ifdef __powerpc64__ | |
42 | #define KEXEC_ARCH KEXEC_ARCH_PPC64 | |
43 | #else | |
44 | #define KEXEC_ARCH KEXEC_ARCH_PPC | |
45 | #endif | |
46 | ||
1fc711f7 MN |
47 | #define KEXEC_STATE_NONE 0 |
48 | #define KEXEC_STATE_IRQS_OFF 1 | |
49 | #define KEXEC_STATE_REAL_MODE 2 | |
50 | ||
2babf5c2 | 51 | #ifndef __ASSEMBLY__ |
b6f35b49 | 52 | #include <linux/cpumask.h> |
73753313 | 53 | #include <asm/reg.h> |
2babf5c2 | 54 | |
aee10c61 AB |
55 | typedef void (*crash_shutdown_t)(void); |
56 | ||
cc532915 ME |
57 | #ifdef CONFIG_KEXEC |
58 | ||
8385a6a3 HM |
59 | /* |
60 | * This function is responsible for capturing register states if coming | |
61 | * via panic or invoking dump using sysrq-trigger. | |
62 | */ | |
63 | static inline void crash_setup_regs(struct pt_regs *newregs, | |
64 | struct pt_regs *oldregs) | |
65 | { | |
66 | if (oldregs) | |
67 | memcpy(newregs, oldregs, sizeof(*newregs)); | |
73753313 AV |
68 | else |
69 | ppc_save_regs(newregs); | |
73753313 | 70 | } |
8385a6a3 | 71 | |
e1df870d ME |
72 | extern void kexec_smp_wait(void); /* get and clear naca physid, wait for |
73 | master to copy new code to 0 */ | |
cc532915 ME |
74 | extern int crashing_cpu; |
75 | extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); | |
c0ce7d08 DW |
76 | extern cpumask_t cpus_in_sr; |
77 | static inline int kexec_sr_activated(int cpu) | |
78 | { | |
79 | return cpu_isset(cpu,cpus_in_sr); | |
80 | } | |
e1df870d | 81 | |
3d1229d6 | 82 | struct kimage; |
cc532915 | 83 | struct pt_regs; |
3d1229d6 ME |
84 | extern void default_machine_kexec(struct kimage *image); |
85 | extern int default_machine_kexec_prepare(struct kimage *image); | |
cc532915 | 86 | extern void default_machine_crash_shutdown(struct pt_regs *regs); |
496b010e MN |
87 | extern int crash_shutdown_register(crash_shutdown_t handler); |
88 | extern int crash_shutdown_unregister(crash_shutdown_t handler); | |
cc532915 | 89 | |
39931e41 | 90 | extern void machine_kexec_simple(struct kimage *image); |
c0ce7d08 | 91 | extern void crash_kexec_secondary(struct pt_regs *regs); |
2babf5c2 | 92 | extern int overlaps_crashkernel(unsigned long start, unsigned long size); |
35dd5432 | 93 | extern void reserve_crashkernel(void); |
2babf5c2 ME |
94 | |
95 | #else /* !CONFIG_KEXEC */ | |
c0ce7d08 DW |
96 | static inline int kexec_sr_activated(int cpu) { return 0; } |
97 | static inline void crash_kexec_secondary(struct pt_regs *regs) { } | |
2babf5c2 ME |
98 | |
99 | static inline int overlaps_crashkernel(unsigned long start, unsigned long size) | |
100 | { | |
101 | return 0; | |
102 | } | |
39931e41 | 103 | |
35dd5432 ME |
104 | static inline void reserve_crashkernel(void) { ; } |
105 | ||
aee10c61 AB |
106 | static inline int crash_shutdown_register(crash_shutdown_t handler) |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static inline int crash_shutdown_unregister(crash_shutdown_t handler) | |
112 | { | |
113 | return 0; | |
114 | } | |
115 | ||
8385a6a3 | 116 | #endif /* CONFIG_KEXEC */ |
2babf5c2 | 117 | #endif /* ! __ASSEMBLY__ */ |
88ced031 | 118 | #endif /* __KERNEL__ */ |
e1df870d | 119 | #endif /* _ASM_POWERPC_KEXEC_H */ |