1 #ifndef _ASM_POWERPC_KEXEC_H 2 #define _ASM_POWERPC_KEXEC_H 3 #ifdef __KERNEL__ 4 5 /* 6 * Maximum page that is mapped directly into kernel memory. 7 * XXX: Since we copy virt we can use any page we allocate 8 */ 9 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL) 10 11 /* 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. 14 */ 15 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL) 16 17 /* Maximum address we can use for the control code buffer */ 18 #ifdef __powerpc64__ 19 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL) 20 #else 21 /* TASK_SIZE, probably left over from use_mm ?? */ 22 #define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE 23 #endif 24 25 #define KEXEC_CONTROL_PAGE_SIZE 4096 26 27 /* The native architecture */ 28 #ifdef __powerpc64__ 29 #define KEXEC_ARCH KEXEC_ARCH_PPC64 30 #else 31 #define KEXEC_ARCH KEXEC_ARCH_PPC 32 #endif 33 34 #ifndef __ASSEMBLY__ 35 #include <linux/cpumask.h> 36 #include <asm/reg.h> 37 38 typedef void (*crash_shutdown_t)(void); 39 40 #ifdef CONFIG_KEXEC 41 42 /* 43 * This function is responsible for capturing register states if coming 44 * via panic or invoking dump using sysrq-trigger. 45 */ 46 static inline void crash_setup_regs(struct pt_regs *newregs, 47 struct pt_regs *oldregs) 48 { 49 if (oldregs) 50 memcpy(newregs, oldregs, sizeof(*newregs)); 51 else 52 ppc_save_regs(newregs); 53 } 54 55 extern void kexec_smp_wait(void); /* get and clear naca physid, wait for 56 master to copy new code to 0 */ 57 extern int crashing_cpu; 58 extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)); 59 extern cpumask_t cpus_in_sr; 60 static inline int kexec_sr_activated(int cpu) 61 { 62 return cpu_isset(cpu,cpus_in_sr); 63 } 64 65 struct kimage; 66 struct pt_regs; 67 extern void default_machine_kexec(struct kimage *image); 68 extern int default_machine_kexec_prepare(struct kimage *image); 69 extern void default_machine_crash_shutdown(struct pt_regs *regs); 70 extern int crash_shutdown_register(crash_shutdown_t handler); 71 extern int crash_shutdown_unregister(crash_shutdown_t handler); 72 73 extern void machine_kexec_simple(struct kimage *image); 74 extern void crash_kexec_secondary(struct pt_regs *regs); 75 extern int overlaps_crashkernel(unsigned long start, unsigned long size); 76 extern void reserve_crashkernel(void); 77 78 #else /* !CONFIG_KEXEC */ 79 static inline int kexec_sr_activated(int cpu) { return 0; } 80 static inline void crash_kexec_secondary(struct pt_regs *regs) { } 81 82 static inline int overlaps_crashkernel(unsigned long start, unsigned long size) 83 { 84 return 0; 85 } 86 87 static inline void reserve_crashkernel(void) { ; } 88 89 static inline int crash_shutdown_register(crash_shutdown_t handler) 90 { 91 return 0; 92 } 93 94 static inline int crash_shutdown_unregister(crash_shutdown_t handler) 95 { 96 return 0; 97 } 98 99 #endif /* CONFIG_KEXEC */ 100 #endif /* ! __ASSEMBLY__ */ 101 #endif /* __KERNEL__ */ 102 #endif /* _ASM_POWERPC_KEXEC_H */ 103