| #ifndef _ARM_KEXEC_H |
| #define _ARM_KEXEC_H |
| |
| #ifdef CONFIG_KEXEC |
| |
| /* 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_ARM |
| |
| #define KEXEC_ARM_ATAGS_OFFSET 0x1000 |
| #define KEXEC_ARM_ZIMAGE_OFFSET 0x8000 |
| |
| #ifndef __ASSEMBLY__ |
| |
| #define ARCH_HAS_KIMAGE_ARCH |
| struct kimage_arch { |
| u32 kernel_r2; |
| }; |
| |
| /** |
| * crash_setup_regs() - save registers for the panic kernel |
| * @newregs: registers are saved here |
| * @oldregs: registers to be saved (may be %NULL) |
| * |
| * Function copies machine registers from @oldregs to @newregs. If @oldregs is |
| * %NULL then current registers are stored there. |
| */ |
| static inline void crash_setup_regs(struct pt_regs *newregs, |
| struct pt_regs *oldregs) |
| { |
| if (oldregs) { |
| memcpy(newregs, oldregs, sizeof(*newregs)); |
| } else { |
| __asm__ __volatile__ ( |
| "stmia %[regs_base], {r0-r12}\n\t" |
| "mov %[_ARM_sp], sp\n\t" |
| "str lr, %[_ARM_lr]\n\t" |
| "adr %[_ARM_pc], 1f\n\t" |
| "mrs %[_ARM_cpsr], cpsr\n\t" |
| "1:" |
| : [_ARM_pc] "=r" (newregs->ARM_pc), |
| [_ARM_cpsr] "=r" (newregs->ARM_cpsr), |
| [_ARM_sp] "=r" (newregs->ARM_sp), |
| [_ARM_lr] "=o" (newregs->ARM_lr) |
| : [regs_base] "r" (&newregs->ARM_r0) |
| : "memory" |
| ); |
| } |
| } |
| |
| /* Function pointer to optional machine-specific reinitialization */ |
| extern void (*kexec_reinit)(void); |
| |
| static inline unsigned long phys_to_boot_phys(phys_addr_t phys) |
| { |
| return phys_to_idmap(phys); |
| } |
| #define phys_to_boot_phys phys_to_boot_phys |
| |
| static inline phys_addr_t boot_phys_to_phys(unsigned long entry) |
| { |
| return idmap_to_phys(entry); |
| } |
| #define boot_phys_to_phys boot_phys_to_phys |
| |
| static inline unsigned long page_to_boot_pfn(struct page *page) |
| { |
| return page_to_pfn(page) + (arch_phys_to_idmap_offset >> PAGE_SHIFT); |
| } |
| #define page_to_boot_pfn page_to_boot_pfn |
| |
| static inline struct page *boot_pfn_to_page(unsigned long boot_pfn) |
| { |
| return pfn_to_page(boot_pfn - (arch_phys_to_idmap_offset >> PAGE_SHIFT)); |
| } |
| #define boot_pfn_to_page boot_pfn_to_page |
| |
| #endif /* __ASSEMBLY__ */ |
| |
| #endif /* CONFIG_KEXEC */ |
| |
| #endif /* _ARM_KEXEC_H */ |