1 #ifndef _ARM_KEXEC_H 2 #define _ARM_KEXEC_H 3 4 #ifdef CONFIG_KEXEC 5 6 /* Maximum physical address we can use pages from */ 7 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 8 /* Maximum address we can reach in physical address mode */ 9 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 10 /* Maximum address we can use for the control code buffer */ 11 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) 12 13 #define KEXEC_CONTROL_PAGE_SIZE 4096 14 15 #define KEXEC_ARCH KEXEC_ARCH_ARM 16 17 #define KEXEC_ARM_ATAGS_OFFSET 0x1000 18 #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000 19 20 #ifndef __ASSEMBLY__ 21 22 #define ARCH_HAS_KIMAGE_ARCH 23 struct kimage_arch { 24 u32 kernel_r2; 25 }; 26 27 /** 28 * crash_setup_regs() - save registers for the panic kernel 29 * @newregs: registers are saved here 30 * @oldregs: registers to be saved (may be %NULL) 31 * 32 * Function copies machine registers from @oldregs to @newregs. If @oldregs is 33 * %NULL then current registers are stored there. 34 */ 35 static inline void crash_setup_regs(struct pt_regs *newregs, 36 struct pt_regs *oldregs) 37 { 38 if (oldregs) { 39 memcpy(newregs, oldregs, sizeof(*newregs)); 40 } else { 41 __asm__ __volatile__ ( 42 "stmia %[regs_base], {r0-r12}\n\t" 43 "mov %[_ARM_sp], sp\n\t" 44 "str lr, %[_ARM_lr]\n\t" 45 "adr %[_ARM_pc], 1f\n\t" 46 "mrs %[_ARM_cpsr], cpsr\n\t" 47 "1:" 48 : [_ARM_pc] "=r" (newregs->ARM_pc), 49 [_ARM_cpsr] "=r" (newregs->ARM_cpsr), 50 [_ARM_sp] "=r" (newregs->ARM_sp), 51 [_ARM_lr] "=o" (newregs->ARM_lr) 52 : [regs_base] "r" (&newregs->ARM_r0) 53 : "memory" 54 ); 55 } 56 } 57 58 /* Function pointer to optional machine-specific reinitialization */ 59 extern void (*kexec_reinit)(void); 60 61 static inline unsigned long phys_to_boot_phys(phys_addr_t phys) 62 { 63 return phys_to_idmap(phys); 64 } 65 #define phys_to_boot_phys phys_to_boot_phys 66 67 static inline phys_addr_t boot_phys_to_phys(unsigned long entry) 68 { 69 return idmap_to_phys(entry); 70 } 71 #define boot_phys_to_phys boot_phys_to_phys 72 73 static inline unsigned long page_to_boot_pfn(struct page *page) 74 { 75 return page_to_pfn(page) + (arch_phys_to_idmap_offset >> PAGE_SHIFT); 76 } 77 #define page_to_boot_pfn page_to_boot_pfn 78 79 static inline struct page *boot_pfn_to_page(unsigned long boot_pfn) 80 { 81 return pfn_to_page(boot_pfn - (arch_phys_to_idmap_offset >> PAGE_SHIFT)); 82 } 83 #define boot_pfn_to_page boot_pfn_to_page 84 85 #endif /* __ASSEMBLY__ */ 86 87 #endif /* CONFIG_KEXEC */ 88 89 #endif /* _ARM_KEXEC_H */ 90