xref: /haiku/headers/private/kernel/cpu.h (revision 508f54795f39c3e7552d87c95aae9dd8ec6f505b)
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 <arch/cpu.h>
17 
18 
19 // define PAUSE, if not done in arch/cpu.h
20 #ifndef PAUSE
21 #	define PAUSE()
22 #endif
23 
24 
25 struct kernel_args;
26 struct thread;
27 
28 
29 /* CPU local data structure */
30 
31 typedef struct cpu_ent {
32 	int				cpu_num;
33 
34 	// thread.c: used to force a reschedule at quantum expiration time
35 	int				preempted;
36 	timer			quantum_timer;
37 
38 	// keeping track of CPU activity
39 	bigtime_t		active_time;
40 	bigtime_t		last_kernel_time;
41 	bigtime_t		last_user_time;
42 
43 	// used in the kernel debugger
44 	addr_t			fault_handler;
45 	addr_t			fault_handler_stack_pointer;
46 	jmp_buf			fault_jump_buffer;
47 
48 	struct thread*	running_thread;
49 	bool			invoke_scheduler;
50 	bool			invoke_scheduler_if_idle;
51 	bool			disabled;
52 
53 	// arch-specific stuff
54 	arch_cpu_info arch;
55 } cpu_ent __attribute__((aligned(64)));
56 
57 
58 //extern cpu_ent gCPU[MAX_BOOT_CPUS];
59 extern cpu_ent gCPU[];
60 
61 
62 #ifdef __cplusplus
63 extern "C" {
64 #endif
65 
66 status_t cpu_preboot_init_percpu(struct kernel_args *args, int curr_cpu);
67 status_t cpu_init(struct kernel_args *args);
68 status_t cpu_init_percpu(struct kernel_args *ka, int curr_cpu);
69 status_t cpu_init_post_vm(struct kernel_args *args);
70 status_t cpu_init_post_modules(struct kernel_args *args);
71 bigtime_t cpu_get_active_time(int32 cpu);
72 
73 cpu_ent *get_cpu_struct(void);
74 extern inline cpu_ent *get_cpu_struct(void) { return &gCPU[smp_get_current_cpu()]; }
75 
76 void _user_clear_caches(void *address, size_t length, uint32 flags);
77 bool _user_cpu_enabled(int32 cpu);
78 status_t _user_set_cpu_enabled(int32 cpu, bool enabled);
79 
80 #ifdef __cplusplus
81 }
82 #endif
83 
84 #endif	/* _KERNEL_CPU_H */
85