| | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| | 2 | #ifndef _PPC64_KDUMP_H |
| | 3 | #define _PPC64_KDUMP_H |
| | 4 | |
| | 5 | #include <asm/page.h> |
| | 6 | |
| | 7 | #define KDUMP_KERNELBASE 0x2000000 |
| | 8 | |
| | 9 | /* How many bytes to reserve at zero for kdump. The reserve limit should |
| | 10 | * be greater or equal to the trampoline's end address. |
| | 11 | * Reserve to the end of the FWNMI area, see head_64.S */ |
| | 12 | #define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */ |
| | 13 | |
| | 14 | #ifdef CONFIG_CRASH_DUMP |
| | 15 | |
| | 16 | /* |
| | 17 | * On PPC64 translation is disabled during trampoline setup, so we use |
| | 18 | * physical addresses. Though on PPC32 translation is already enabled, |
| | 19 | * so we can't do the same. Luckily create_trampoline() creates relative |
| | 20 | * branches, so we can just add the PAGE_OFFSET and don't worry about it. |
| | 21 | */ |
| | 22 | #ifdef __powerpc64__ |
| | 23 | #define KDUMP_TRAMPOLINE_START 0x0100 |
| | 24 | #define KDUMP_TRAMPOLINE_END 0x3000 |
| | 25 | #else |
| | 26 | #define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET) |
| | 27 | #define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET) |
| | 28 | #endif /* __powerpc64__ */ |
| | 29 | |
| | 30 | #define KDUMP_MIN_TCE_ENTRIES 2048 |
| | 31 | |
| | 32 | #endif /* CONFIG_CRASH_DUMP */ |
| | 33 | |
| | 34 | #ifndef __ASSEMBLY__ |
| | 35 | |
| | 36 | #if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_NONSTATIC_KERNEL) |
| | 37 | extern void reserve_kdump_trampoline(void); |
| | 38 | extern void setup_kdump_trampoline(void); |
| | 39 | #else |
| | 40 | /* !CRASH_DUMP || !NONSTATIC_KERNEL */ |
| | 41 | static inline void reserve_kdump_trampoline(void) { ; } |
| | 42 | static inline void setup_kdump_trampoline(void) { ; } |
| | 43 | #endif |
| | 44 | |
| | 45 | #endif /* __ASSEMBLY__ */ |
| | 46 | |
| | 47 | #endif /* __PPC64_KDUMP_H */ |
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