| #ifndef _ASM_POWERPC_KEXEC_H |
| #define _ASM_POWERPC_KEXEC_H |
| #ifdef __KERNEL__ |
| |
| /* |
| * Maximum page that is mapped directly into kernel memory. |
| * XXX: Since we copy virt we can use any page we allocate |
| */ |
| #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) |
| |
| /* |
| * Maximum address we can reach in physical address mode. |
| * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR. |
| */ |
| #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) |
| |
| /* Maximum address we can use for the control code buffer */ |
| #ifdef __powerpc64__ |
| #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) |
| #else |
| /* TASK_SIZE, probably left over from use_mm ?? */ |
| #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE |
| #endif |
| |
| #define KEXEC_CONTROL_PAGE_SIZE 4096 |
| |
| /* The native architecture */ |
| #ifdef __powerpc64__ |
| #define KEXEC_ARCH KEXEC_ARCH_PPC64 |
| #else |
| #define KEXEC_ARCH KEXEC_ARCH_PPC |
| #endif |
| |
| #define KEXEC_STATE_NONE 0 |
| #define KEXEC_STATE_IRQS_OFF 1 |
| #define KEXEC_STATE_REAL_MODE 2 |
| |
| #ifndef __ASSEMBLY__ |
| #include <linux/cpumask.h> |
| #include <asm/reg.h> |
| |
| typedef void (*crash_shutdown_t)(void); |
| |
| #ifdef CONFIG_KEXEC |
| |
| /* |
| * This function is responsible for capturing register states if coming |
| * via panic or invoking dump using sysrq-trigger. |
| */ |
| static inline void crash_setup_regs(struct pt_regs *newregs, |
| struct pt_regs *oldregs) |
| { |
| if (oldregs) |
| memcpy(newregs, oldregs, sizeof(*newregs)); |
| else |
| ppc_save_regs(newregs); |
| } |
| |
| extern void kexec_smp_wait(void); /* get and clear naca physid, wait for |
| master to copy new code to 0 */ |
| extern int crashing_cpu; |
| extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); |
| extern cpumask_t cpus_in_sr; |
| static inline int kexec_sr_activated(int cpu) |
| { |
| return cpu_isset(cpu,cpus_in_sr); |
| } |
| |
| struct kimage; |
| struct pt_regs; |
| extern void default_machine_kexec(struct kimage *image); |
| extern int default_machine_kexec_prepare(struct kimage *image); |
| extern void default_machine_crash_shutdown(struct pt_regs *regs); |
| extern int crash_shutdown_register(crash_shutdown_t handler); |
| extern int crash_shutdown_unregister(crash_shutdown_t handler); |
| |
| extern void machine_kexec_simple(struct kimage *image); |
| extern void crash_kexec_secondary(struct pt_regs *regs); |
| extern int overlaps_crashkernel(unsigned long start, unsigned long size); |
| extern void reserve_crashkernel(void); |
| |
| #else /* !CONFIG_KEXEC */ |
| static inline int kexec_sr_activated(int cpu) { return 0; } |
| static inline void crash_kexec_secondary(struct pt_regs *regs) { } |
| |
| static inline int overlaps_crashkernel(unsigned long start, unsigned long size) |
| { |
| return 0; |
| } |
| |
| static inline void reserve_crashkernel(void) { ; } |
| |
| static inline int crash_shutdown_register(crash_shutdown_t handler) |
| { |
| return 0; |
| } |
| |
| static inline int crash_shutdown_unregister(crash_shutdown_t handler) |
| { |
| return 0; |
| } |
| |
| #endif /* CONFIG_KEXEC */ |
| #endif /* ! __ASSEMBLY__ */ |
| #endif /* __KERNEL__ */ |
| #endif /* _ASM_POWERPC_KEXEC_H */ |