2 * Copyright (c) 2003, Joseph Koshy
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * PMC interface used by the base kernel.
33 #ifndef _SYS_PMCKERN_H_
34 #define _SYS_PMCKERN_H_
36 #include <sys/param.h>
37 #include <sys/kernel.h>
42 #define PMC_FN_PROCESS_EXIT 1
43 #define PMC_FN_PROCESS_EXEC 2
44 #define PMC_FN_PROCESS_FORK 3
45 #define PMC_FN_CSW_IN 4
46 #define PMC_FN_CSW_OUT 5
49 extern int (*pmc_hook)(struct thread *_td, int _function, void *_arg);
50 extern int (*pmc_intr)(int cpu, uintptr_t pc);
52 /* SX lock protecting the hook */
53 extern struct sx pmc_sx;
55 /* hook invocation; for use within the kernel */
56 #define PMC_CALL_HOOK(t, cmd, arg) \
59 if (pmc_hook != NULL) \
60 (pmc_hook)((t), (cmd), (arg)); \
61 sx_sunlock(&pmc_sx); \
64 /* hook invocation that needs an exclusive lock */
65 #define PMC_CALL_HOOK_X(t, cmd, arg) \
68 if (pmc_hook != NULL) \
69 (pmc_hook)((t), (cmd), (arg)); \
70 sx_xunlock(&pmc_sx); \
73 /* context switches cannot take locks */
74 #define PMC_SWITCH_CONTEXT(t, cmd) \
76 if (pmc_hook != NULL) \
77 (pmc_hook)((t), (cmd), NULL); \
82 * check if a process is using HWPMCs.
85 #define PMC_PROC_IS_USING_PMCS(p) \
86 (__predict_false(atomic_load_acq_int(&(p)->p_flag) & \
89 /* helper functions */
90 int pmc_cpu_is_disabled(int _cpu);
91 int pmc_cpu_is_logical(int _cpu);
93 #endif /* _SYS_PMCKERN_H_ */