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)
13 #define KEXEC_CONTROL_PAGE_SIZE 4096
15 #define KEXEC_ARCH KEXEC_ARCH_ARM
17 #define KEXEC_ARM_ATAGS_OFFSET 0x1000
18 #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000
22 #define ARCH_HAS_KIMAGE_ARCH
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)
32 * Function copies machine registers from @oldregs to @newregs. If @oldregs is
33 * %NULL then current registers are stored there.
35 static inline void crash_setup_regs(struct pt_regs *newregs,
36 struct pt_regs *oldregs)
39 memcpy(newregs, oldregs, sizeof(*newregs));
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"
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)
58 /* Function pointer to optional machine-specific reinitialization */
59 extern void (*kexec_reinit)(void);
61 static inline unsigned long phys_to_boot_phys(phys_addr_t phys)
63 return phys_to_idmap(phys);
65 #define phys_to_boot_phys phys_to_boot_phys
67 static inline phys_addr_t boot_phys_to_phys(unsigned long entry)
69 return idmap_to_phys(entry);
71 #define boot_phys_to_phys boot_phys_to_phys
73 static inline unsigned long page_to_boot_pfn(struct page *page)
75 return page_to_pfn(page) + (arch_phys_to_idmap_offset >> PAGE_SHIFT);
77 #define page_to_boot_pfn page_to_boot_pfn
79 static inline struct page *boot_pfn_to_page(unsigned long boot_pfn)
81 return pfn_to_page(boot_pfn - (arch_phys_to_idmap_offset >> PAGE_SHIFT));
83 #define boot_pfn_to_page boot_pfn_to_page
85 #endif /* __ASSEMBLY__ */
87 #endif /* CONFIG_KEXEC */
89 #endif /* _ARM_KEXEC_H */