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119 lines
2.8 KiB
119 lines
2.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* kexec for arm64 |
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* |
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* Copyright (C) Linaro. |
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* Copyright (C) Huawei Futurewei Technologies. |
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*/ |
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#ifndef _ARM64_KEXEC_H |
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#define _ARM64_KEXEC_H |
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/* Maximum physical address we can use pages from */ |
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#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) |
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/* Maximum address we can reach in physical address mode */ |
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#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) |
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/* Maximum address we can use for the control code buffer */ |
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#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) |
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#define KEXEC_CONTROL_PAGE_SIZE 4096 |
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#define KEXEC_ARCH KEXEC_ARCH_AARCH64 |
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#ifndef __ASSEMBLY__ |
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/** |
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* crash_setup_regs() - save registers for the panic kernel |
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* |
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* @newregs: registers are saved here |
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* @oldregs: registers to be saved (may be %NULL) |
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*/ |
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static inline void crash_setup_regs(struct pt_regs *newregs, |
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struct pt_regs *oldregs) |
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{ |
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if (oldregs) { |
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memcpy(newregs, oldregs, sizeof(*newregs)); |
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} else { |
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u64 tmp1, tmp2; |
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__asm__ __volatile__ ( |
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"stp x0, x1, [%2, #16 * 0]\n" |
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"stp x2, x3, [%2, #16 * 1]\n" |
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"stp x4, x5, [%2, #16 * 2]\n" |
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"stp x6, x7, [%2, #16 * 3]\n" |
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"stp x8, x9, [%2, #16 * 4]\n" |
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"stp x10, x11, [%2, #16 * 5]\n" |
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"stp x12, x13, [%2, #16 * 6]\n" |
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"stp x14, x15, [%2, #16 * 7]\n" |
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"stp x16, x17, [%2, #16 * 8]\n" |
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"stp x18, x19, [%2, #16 * 9]\n" |
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"stp x20, x21, [%2, #16 * 10]\n" |
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"stp x22, x23, [%2, #16 * 11]\n" |
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"stp x24, x25, [%2, #16 * 12]\n" |
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"stp x26, x27, [%2, #16 * 13]\n" |
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"stp x28, x29, [%2, #16 * 14]\n" |
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"mov %0, sp\n" |
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"stp x30, %0, [%2, #16 * 15]\n" |
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"/* faked current PSTATE */\n" |
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"mrs %0, CurrentEL\n" |
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"mrs %1, SPSEL\n" |
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"orr %0, %0, %1\n" |
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"mrs %1, DAIF\n" |
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"orr %0, %0, %1\n" |
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"mrs %1, NZCV\n" |
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"orr %0, %0, %1\n" |
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/* pc */ |
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"adr %1, 1f\n" |
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"1:\n" |
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"stp %1, %0, [%2, #16 * 16]\n" |
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: "=&r" (tmp1), "=&r" (tmp2) |
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: "r" (newregs) |
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: "memory" |
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); |
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} |
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} |
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#if defined(CONFIG_KEXEC_CORE) && defined(CONFIG_HIBERNATION) |
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extern bool crash_is_nosave(unsigned long pfn); |
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extern void crash_prepare_suspend(void); |
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extern void crash_post_resume(void); |
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#else |
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static inline bool crash_is_nosave(unsigned long pfn) {return false; } |
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static inline void crash_prepare_suspend(void) {} |
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static inline void crash_post_resume(void) {} |
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#endif |
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#define ARCH_HAS_KIMAGE_ARCH |
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struct kimage_arch { |
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void *dtb; |
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phys_addr_t dtb_mem; |
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phys_addr_t kern_reloc; |
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/* Core ELF header buffer */ |
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void *elf_headers; |
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unsigned long elf_headers_mem; |
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unsigned long elf_headers_sz; |
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}; |
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#ifdef CONFIG_KEXEC_FILE |
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extern const struct kexec_file_ops kexec_image_ops; |
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struct kimage; |
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extern int arch_kimage_file_post_load_cleanup(struct kimage *image); |
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extern int load_other_segments(struct kimage *image, |
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unsigned long kernel_load_addr, unsigned long kernel_size, |
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char *initrd, unsigned long initrd_len, |
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char *cmdline); |
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#endif |
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#endif /* __ASSEMBLY__ */ |
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#endif
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