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