2 * Copyright (c) 2003 Joseph Koshy
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/pmckern.h>
35 int (*pmc_hook)(struct thread *td, int function, void *arg) = NULL;
37 /* Interrupt handler */
38 int (*pmc_intr)(int cpu, uintptr_t pc) = NULL;
41 * Since PMC(4) may not be loaded in the current kernel, the
42 * convention followed is that a non-NULL value of 'pmc_hook' implies
43 * the presence of this kernel module.
45 * This requires us to protect 'pmc_hook' with a
46 * shared (sx) lock -- thus making the process of calling into PMC(4)
47 * somewhat more expensive than a simple 'if' check and indirect call.
51 SX_SYSINIT(pmc, &pmc_sx, "pmc shared lock");
56 * return TRUE if the cpu specified has been disabled.
60 pmc_cpu_is_disabled(int cpu)
63 return ((hlt_cpus_mask & (1 << cpu)) != 0);
70 pmc_cpu_is_logical(int cpu)
73 return ((logical_cpus_mask & (1 << cpu)) != 0);