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0cc4746c ME |
1 | #ifndef _PPC64_KDUMP_H |
2 | #define _PPC64_KDUMP_H | |
3 | ||
f8f50b1b DF |
4 | #include <asm/page.h> |
5 | ||
b5416ca9 AB |
6 | /* |
7 | * If CONFIG_RELOCATABLE is enabled we can place the kdump kernel anywhere. | |
8 | * To keep enough space in the RMO for the first stage kernel on 64bit, we | |
9 | * place it at 64MB. If CONFIG_RELOCATABLE is not enabled we must place | |
10 | * the second stage at 32MB. | |
11 | */ | |
12 | #if defined(CONFIG_RELOCATABLE) && defined(CONFIG_PPC64) | |
13 | #define KDUMP_KERNELBASE 0x4000000 | |
14 | #else | |
47310413 | 15 | #define KDUMP_KERNELBASE 0x2000000 |
b5416ca9 | 16 | #endif |
47310413 | 17 | |
0cc4746c | 18 | /* How many bytes to reserve at zero for kdump. The reserve limit should |
47310413 ME |
19 | * be greater or equal to the trampoline's end address. |
20 | * Reserve to the end of the FWNMI area, see head_64.S */ | |
e269d269 | 21 | #define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */ |
0cc4746c | 22 | |
47310413 ME |
23 | #ifdef CONFIG_CRASH_DUMP |
24 | ||
f8f50b1b DF |
25 | /* |
26 | * On PPC64 translation is disabled during trampoline setup, so we use | |
27 | * physical addresses. Though on PPC32 translation is already enabled, | |
28 | * so we can't do the same. Luckily create_trampoline() creates relative | |
29 | * branches, so we can just add the PAGE_OFFSET and don't worry about it. | |
30 | */ | |
31 | #ifdef __powerpc64__ | |
0cc4746c ME |
32 | #define KDUMP_TRAMPOLINE_START 0x0100 |
33 | #define KDUMP_TRAMPOLINE_END 0x3000 | |
f8f50b1b DF |
34 | #else |
35 | #define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET) | |
36 | #define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET) | |
37 | #endif /* __powerpc64__ */ | |
0cc4746c | 38 | |
5f50867b HM |
39 | #define KDUMP_MIN_TCE_ENTRIES 2048 |
40 | ||
47310413 ME |
41 | #endif /* CONFIG_CRASH_DUMP */ |
42 | ||
43 | #ifndef __ASSEMBLY__ | |
47310413 | 44 | |
54622f10 | 45 | #if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_RELOCATABLE) |
47310413 ME |
46 | extern void reserve_kdump_trampoline(void); |
47 | extern void setup_kdump_trampoline(void); | |
54622f10 MK |
48 | #else |
49 | /* !CRASH_DUMP || RELOCATABLE */ | |
47310413 ME |
50 | static inline void reserve_kdump_trampoline(void) { ; } |
51 | static inline void setup_kdump_trampoline(void) { ; } | |
54622f10 | 52 | #endif |
47310413 | 53 | |
47310413 | 54 | #endif /* __ASSEMBLY__ */ |
0cc4746c ME |
55 | |
56 | #endif /* __PPC64_KDUMP_H */ |