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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | #ifndef _ARM_KEXEC_H |
| 3 | #define _ARM_KEXEC_H |
| 4 | |
| 5 | /* Maximum physical address we can use pages from */ |
| 6 | #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) |
| 7 | /* Maximum address we can reach in physical address mode */ |
| 8 | #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) |
| 9 | /* Maximum address we can use for the control code buffer */ |
| 10 | #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) |
| 11 | |
| 12 | #define KEXEC_CONTROL_PAGE_SIZE 4096 |
| 13 | |
| 14 | #define KEXEC_ARCH KEXEC_ARCH_ARM |
| 15 | |
| 16 | #define KEXEC_ARM_ATAGS_OFFSET 0x1000 |
| 17 | #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000 |
| 18 | |
| 19 | #ifndef __ASSEMBLY__ |
| 20 | |
| 21 | #define ARCH_HAS_KIMAGE_ARCH |
| 22 | struct kimage_arch { |
| 23 | u32 kernel_r2; |
| 24 | }; |
| 25 | |
| 26 | /** |
| 27 | * crash_setup_regs() - save registers for the panic kernel |
| 28 | * @newregs: registers are saved here |
| 29 | * @oldregs: registers to be saved (may be %NULL) |
| 30 | * |
| 31 | * Function copies machine registers from @oldregs to @newregs. If @oldregs is |
| 32 | * %NULL then current registers are stored there. |
| 33 | */ |
| 34 | static inline void crash_setup_regs(struct pt_regs *newregs, |
| 35 | struct pt_regs *oldregs) |
| 36 | { |
| 37 | if (oldregs) { |
| 38 | memcpy(newregs, oldregs, sizeof(*newregs)); |
| 39 | } else { |
| 40 | __asm__ __volatile__ ( |
| 41 | "stmia %[regs_base], {r0-r12}\n\t" |
| 42 | "mov %[_ARM_sp], sp\n\t" |
| 43 | "str lr, %[_ARM_lr]\n\t" |
| 44 | "adr %[_ARM_pc], 1f\n\t" |
| 45 | "mrs %[_ARM_cpsr], cpsr\n\t" |
| 46 | "1:" |
| 47 | : [_ARM_pc] "=r" (newregs->ARM_pc), |
| 48 | [_ARM_cpsr] "=r" (newregs->ARM_cpsr), |
| 49 | [_ARM_sp] "=r" (newregs->ARM_sp), |
| 50 | [_ARM_lr] "=o" (newregs->ARM_lr) |
| 51 | : [regs_base] "r" (&newregs->ARM_r0) |
| 52 | : "memory" |
| 53 | ); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | static inline unsigned long phys_to_boot_phys(phys_addr_t phys) |
| 58 | { |
| 59 | return phys_to_idmap(phys); |
| 60 | } |
| 61 | #define phys_to_boot_phys phys_to_boot_phys |
| 62 | |
| 63 | static inline phys_addr_t boot_phys_to_phys(unsigned long entry) |
| 64 | { |
| 65 | return idmap_to_phys(entry); |
| 66 | } |
| 67 | #define boot_phys_to_phys boot_phys_to_phys |
| 68 | |
| 69 | static inline unsigned long page_to_boot_pfn(struct page *page) |
| 70 | { |
| 71 | return page_to_pfn(page) + (arch_phys_to_idmap_offset >> PAGE_SHIFT); |
| 72 | } |
| 73 | #define page_to_boot_pfn page_to_boot_pfn |
| 74 | |
| 75 | static inline struct page *boot_pfn_to_page(unsigned long boot_pfn) |
| 76 | { |
| 77 | return pfn_to_page(boot_pfn - (arch_phys_to_idmap_offset >> PAGE_SHIFT)); |
| 78 | } |
| 79 | #define boot_pfn_to_page boot_pfn_to_page |
| 80 | |
| 81 | #endif /* __ASSEMBLY__ */ |
| 82 | |
| 83 | #endif /* _ARM_KEXEC_H */ |
| 84 |
Warning: This file is not a C or C++ file. It does not have highlighting.