#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_CODE_SIZE 4096 /* The native architecture */ #ifdef __powerpc64__ #define KEXEC_ARCH KEXEC_ARCH_PPC64 #else #define KEXEC_ARCH KEXEC_ARCH_PPC #endif #ifndef __ASSEMBLY__ #include <linux/cpumask.h> #ifdef CONFIG_KEXEC #ifdef __powerpc64__ /* * 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 { /* FIXME Merge this with xmon_save_regs ?? */ unsigned long tmp1, tmp2; __asm__ __volatile__ ( "std 0,0(%2)\n" "std 1,8(%2)\n" "std 2,16(%2)\n" "std 3,24(%2)\n" "std 4,32(%2)\n" "std 5,40(%2)\n" "std 6,48(%2)\n" "std 7,56(%2)\n" "std 8,64(%2)\n" "std 9,72(%2)\n" "std 10,80(%2)\n" "std 11,88(%2)\n" "std 12,96(%2)\n" "std 13,104(%2)\n" "std 14,112(%2)\n" "std 15,120(%2)\n" "std 16,128(%2)\n" "std 17,136(%2)\n" "std 18,144(%2)\n" "std 19,152(%2)\n" "std 20,160(%2)\n" "std 21,168(%2)\n" "std 22,176(%2)\n" "std 23,184(%2)\n" "std 24,192(%2)\n" "std 25,200(%2)\n" "std 26,208(%2)\n" "std 27,216(%2)\n" "std 28,224(%2)\n" "std 29,232(%2)\n" "std 30,240(%2)\n" "std 31,248(%2)\n" "mfmsr %0\n" "std %0, 264(%2)\n" "mfctr %0\n" "std %0, 280(%2)\n" "mflr %0\n" "std %0, 288(%2)\n" "bl 1f\n" "1: mflr %1\n" "std %1, 256(%2)\n" "mtlr %0\n" "mfxer %0\n" "std %0, 296(%2)\n" : "=&r" (tmp1), "=&r" (tmp2) : "b" (newregs) : "memory"); } } #else /* * Provide a dummy definition to avoid build failures. Will remain * empty till crash dump support is enabled. */ static inline void crash_setup_regs(struct pt_regs *newregs, struct pt_regs *oldregs) { } #endif /* !__powerpc64 __ */ 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); typedef void (*crash_shutdown_t)(void); 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) { ; } #endif /* CONFIG_KEXEC */ #endif /* ! __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KEXEC_H */