1 /* 2 * Copyright 2002-2006, Haiku Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Copyright 2002, Travis Geiselbrecht. All rights reserved. 6 * Distributed under the terms of the NewOS License. 7 */ 8 #ifndef _KERNEL_CPU_H 9 #define _KERNEL_CPU_H 10 11 12 #include <smp.h> 13 #include <timer.h> 14 #include <boot/kernel_args.h> 15 #include <arch/cpu.h> 16 17 18 /* CPU local data structure */ 19 20 typedef struct cpu_ent { 21 int cpu_num; 22 23 // thread.c: used to force a reschedule at quantum expiration time 24 int preempted; 25 timer quantum_timer; 26 27 // keeping track of CPU activity 28 bigtime_t active_time; 29 bigtime_t last_kernel_time; 30 bigtime_t last_user_time; 31 32 bool disabled; 33 34 // arch-specific stuff 35 arch_cpu_info arch; 36 } cpu_ent __attribute__((aligned(64))); 37 38 39 extern cpu_ent gCPU[MAX_BOOT_CPUS]; 40 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 status_t cpu_preboot_init_percpu(struct kernel_args *args, int curr_cpu); 47 status_t cpu_init(struct kernel_args *args); 48 status_t cpu_init_percpu(kernel_args *ka, int curr_cpu); 49 status_t cpu_init_post_vm(struct kernel_args *args); 50 status_t cpu_init_post_modules(struct kernel_args *args); 51 bigtime_t cpu_get_active_time(int32 cpu); 52 53 cpu_ent *get_cpu_struct(void); 54 extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; } 55 56 void _user_clear_caches(void *address, size_t length, uint32 flags); 57 bool _user_cpu_enabled(int32 cpu); 58 status_t _user_set_cpu_enabled(int32 cpu, bool enabled); 59 60 #ifdef __cplusplus 61 } 62 #endif 63 64 #endif /* _KERNEL_CPU_H */ 65