Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Geoff Levand | d28f6df | 2016-06-23 17:54:48 +0000 | [diff] [blame] | 2 | /* |
| 3 | * kexec for arm64 |
| 4 | * |
| 5 | * Copyright (C) Linaro. |
| 6 | * Copyright (C) Huawei Futurewei Technologies. |
Geoff Levand | d28f6df | 2016-06-23 17:54:48 +0000 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #ifndef _ARM64_KEXEC_H |
| 10 | #define _ARM64_KEXEC_H |
| 11 | |
| 12 | /* Maximum physical address we can use pages from */ |
| 13 | |
| 14 | #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) |
| 15 | |
| 16 | /* Maximum address we can reach in physical address mode */ |
| 17 | |
| 18 | #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) |
| 19 | |
| 20 | /* Maximum address we can use for the control code buffer */ |
| 21 | |
| 22 | #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) |
| 23 | |
| 24 | #define KEXEC_CONTROL_PAGE_SIZE 4096 |
| 25 | |
| 26 | #define KEXEC_ARCH KEXEC_ARCH_AARCH64 |
| 27 | |
| 28 | #ifndef __ASSEMBLY__ |
| 29 | |
| 30 | /** |
| 31 | * crash_setup_regs() - save registers for the panic kernel |
| 32 | * |
| 33 | * @newregs: registers are saved here |
| 34 | * @oldregs: registers to be saved (may be %NULL) |
| 35 | */ |
| 36 | |
| 37 | static inline void crash_setup_regs(struct pt_regs *newregs, |
| 38 | struct pt_regs *oldregs) |
| 39 | { |
AKASHI Takahiro | 78fd584 | 2017-04-03 11:24:36 +0900 | [diff] [blame] | 40 | if (oldregs) { |
| 41 | memcpy(newregs, oldregs, sizeof(*newregs)); |
| 42 | } else { |
| 43 | u64 tmp1, tmp2; |
| 44 | |
| 45 | __asm__ __volatile__ ( |
| 46 | "stp x0, x1, [%2, #16 * 0]\n" |
| 47 | "stp x2, x3, [%2, #16 * 1]\n" |
| 48 | "stp x4, x5, [%2, #16 * 2]\n" |
| 49 | "stp x6, x7, [%2, #16 * 3]\n" |
| 50 | "stp x8, x9, [%2, #16 * 4]\n" |
| 51 | "stp x10, x11, [%2, #16 * 5]\n" |
| 52 | "stp x12, x13, [%2, #16 * 6]\n" |
| 53 | "stp x14, x15, [%2, #16 * 7]\n" |
| 54 | "stp x16, x17, [%2, #16 * 8]\n" |
| 55 | "stp x18, x19, [%2, #16 * 9]\n" |
| 56 | "stp x20, x21, [%2, #16 * 10]\n" |
| 57 | "stp x22, x23, [%2, #16 * 11]\n" |
| 58 | "stp x24, x25, [%2, #16 * 12]\n" |
| 59 | "stp x26, x27, [%2, #16 * 13]\n" |
| 60 | "stp x28, x29, [%2, #16 * 14]\n" |
| 61 | "mov %0, sp\n" |
| 62 | "stp x30, %0, [%2, #16 * 15]\n" |
| 63 | |
| 64 | "/* faked current PSTATE */\n" |
| 65 | "mrs %0, CurrentEL\n" |
| 66 | "mrs %1, SPSEL\n" |
| 67 | "orr %0, %0, %1\n" |
| 68 | "mrs %1, DAIF\n" |
| 69 | "orr %0, %0, %1\n" |
| 70 | "mrs %1, NZCV\n" |
| 71 | "orr %0, %0, %1\n" |
| 72 | /* pc */ |
| 73 | "adr %1, 1f\n" |
| 74 | "1:\n" |
| 75 | "stp %1, %0, [%2, #16 * 16]\n" |
| 76 | : "=&r" (tmp1), "=&r" (tmp2) |
| 77 | : "r" (newregs) |
| 78 | : "memory" |
| 79 | ); |
| 80 | } |
Geoff Levand | d28f6df | 2016-06-23 17:54:48 +0000 | [diff] [blame] | 81 | } |
| 82 | |
AKASHI Takahiro | 254a41c | 2017-04-03 11:24:35 +0900 | [diff] [blame] | 83 | #if defined(CONFIG_KEXEC_CORE) && defined(CONFIG_HIBERNATION) |
| 84 | extern bool crash_is_nosave(unsigned long pfn); |
| 85 | extern void crash_prepare_suspend(void); |
| 86 | extern void crash_post_resume(void); |
| 87 | #else |
| 88 | static inline bool crash_is_nosave(unsigned long pfn) {return false; } |
| 89 | static inline void crash_prepare_suspend(void) {} |
| 90 | static inline void crash_post_resume(void) {} |
| 91 | #endif |
| 92 | |
AKASHI Takahiro | 52b2a8a | 2018-11-15 14:52:49 +0900 | [diff] [blame] | 93 | #ifdef CONFIG_KEXEC_FILE |
| 94 | #define ARCH_HAS_KIMAGE_ARCH |
| 95 | |
| 96 | struct kimage_arch { |
| 97 | void *dtb; |
| 98 | unsigned long dtb_mem; |
| 99 | }; |
| 100 | |
AKASHI Takahiro | f3b70e5 | 2018-11-15 14:52:50 +0900 | [diff] [blame] | 101 | extern const struct kexec_file_ops kexec_image_ops; |
| 102 | |
AKASHI Takahiro | 52b2a8a | 2018-11-15 14:52:49 +0900 | [diff] [blame] | 103 | struct kimage; |
| 104 | |
| 105 | extern int arch_kimage_file_post_load_cleanup(struct kimage *image); |
| 106 | extern int load_other_segments(struct kimage *image, |
| 107 | unsigned long kernel_load_addr, unsigned long kernel_size, |
| 108 | char *initrd, unsigned long initrd_len, |
| 109 | char *cmdline); |
| 110 | #endif |
| 111 | |
Geoff Levand | d28f6df | 2016-06-23 17:54:48 +0000 | [diff] [blame] | 112 | #endif /* __ASSEMBLY__ */ |
| 113 | |
| 114 | #endif |