1 #ifndef _ASM_POWERPC_KEXEC_H
2 #define _ASM_POWERPC_KEXEC_H
6 * Maximum page that is mapped directly into kernel memory.
7 * XXX: Since we copy virt we can use any page we allocate
9 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
12 * Maximum address we can reach in physical address mode.
13 * XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
15 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
17 /* Maximum address we can use for the control code buffer */
19 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
21 /* TASK_SIZE, probably left over from use_mm ?? */
22 #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
25 #define KEXEC_CONTROL_PAGE_SIZE 4096
27 /* The native architecture */
29 #define KEXEC_ARCH KEXEC_ARCH_PPC64
31 #define KEXEC_ARCH KEXEC_ARCH_PPC
34 #define KEXEC_STATE_NONE 0
35 #define KEXEC_STATE_IRQS_OFF 1
36 #define KEXEC_STATE_REAL_MODE 2
39 #include <linux/cpumask.h>
42 typedef void (*crash_shutdown_t)(void);
47 * This function is responsible for capturing register states if coming
48 * via panic or invoking dump using sysrq-trigger.
50 static inline void crash_setup_regs(struct pt_regs *newregs,
51 struct pt_regs *oldregs)
54 memcpy(newregs, oldregs, sizeof(*newregs));
56 ppc_save_regs(newregs);
59 extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
60 master to copy new code to 0 */
61 extern int crashing_cpu;
62 extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
63 extern cpumask_t cpus_in_sr;
64 static inline int kexec_sr_activated(int cpu)
66 return cpu_isset(cpu,cpus_in_sr);
71 extern void default_machine_kexec(struct kimage *image);
72 extern int default_machine_kexec_prepare(struct kimage *image);
73 extern void default_machine_crash_shutdown(struct pt_regs *regs);
74 extern int crash_shutdown_register(crash_shutdown_t handler);
75 extern int crash_shutdown_unregister(crash_shutdown_t handler);
77 extern void machine_kexec_simple(struct kimage *image);
78 extern void crash_kexec_secondary(struct pt_regs *regs);
79 extern int overlaps_crashkernel(unsigned long start, unsigned long size);
80 extern void reserve_crashkernel(void);
82 #else /* !CONFIG_KEXEC */
83 static inline int kexec_sr_activated(int cpu) { return 0; }
84 static inline void crash_kexec_secondary(struct pt_regs *regs) { }
86 static inline int overlaps_crashkernel(unsigned long start, unsigned long size)
91 static inline void reserve_crashkernel(void) { ; }
93 static inline int crash_shutdown_register(crash_shutdown_t handler)
98 static inline int crash_shutdown_unregister(crash_shutdown_t handler)
103 #endif /* CONFIG_KEXEC */
104 #endif /* ! __ASSEMBLY__ */
105 #endif /* __KERNEL__ */
106 #endif /* _ASM_POWERPC_KEXEC_H */