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 <setjmp.h> 13 14 #include <smp.h> 15 #include <timer.h> 16 #include <boot/kernel_args.h> 17 #include <arch/cpu.h> 18 19 20 // define PAUSE, if not done in arch/cpu.h 21 #ifndef PAUSE 22 # define PAUSE() 23 #endif 24 25 26 /* CPU local data structure */ 27 28 typedef struct cpu_ent { 29 int cpu_num; 30 31 // thread.c: used to force a reschedule at quantum expiration time 32 int preempted; 33 timer quantum_timer; 34 35 // keeping track of CPU activity 36 bigtime_t active_time; 37 bigtime_t last_kernel_time; 38 bigtime_t last_user_time; 39 40 // used in the kernel debugger 41 addr_t fault_handler; 42 addr_t fault_handler_stack_pointer; 43 jmp_buf fault_jump_buffer; 44 45 bool invoke_scheduler; 46 bool disabled; 47 48 // arch-specific stuff 49 arch_cpu_info arch; 50 } cpu_ent __attribute__((aligned(64))); 51 52 53 extern cpu_ent gCPU[MAX_BOOT_CPUS]; 54 55 56 #ifdef __cplusplus 57 extern "C" { 58 #endif 59 60 status_t cpu_preboot_init_percpu(struct kernel_args *args, int curr_cpu); 61 status_t cpu_init(struct kernel_args *args); 62 status_t cpu_init_percpu(kernel_args *ka, int curr_cpu); 63 status_t cpu_init_post_vm(struct kernel_args *args); 64 status_t cpu_init_post_modules(struct kernel_args *args); 65 bigtime_t cpu_get_active_time(int32 cpu); 66 67 cpu_ent *get_cpu_struct(void); 68 extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; } 69 70 void _user_clear_caches(void *address, size_t length, uint32 flags); 71 bool _user_cpu_enabled(int32 cpu); 72 status_t _user_set_cpu_enabled(int32 cpu, bool enabled); 73 74 #ifdef __cplusplus 75 } 76 #endif 77 78 #endif /* _KERNEL_CPU_H */ 79