102 lines
1.9 KiB
C
102 lines
1.9 KiB
C
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/*
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* This file is part of msrtool.
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*
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* Copyright (c) 2009 Andriy Gapon <avg@icyb.net.ua>
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* Copyright (c) 2009 Peter Stuge <peter@stuge.se>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include "msrtool.h"
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static int msr_fd[MAX_CORES] = {-1, -1, -1, -1, -1, -1, -1, -1};
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int freebsd_probe(const struct sysdef *system)
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{
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#ifdef __FreeBSD__
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struct stat st;
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return stat("/dev/cpuctl0", &st) == 0;
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#else
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return 0;
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#endif
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}
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int freebsd_open(uint8_t cpu, enum SysModes mode)
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{
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#ifdef __FreeBSD__
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int flags;
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char devname[32];
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if (cpu >= MAX_CORES)
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return 0;
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if (SYS_RDWR == mode)
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flags = O_RDWR;
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else if (SYS_WRONLY == mode)
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flags = O_WRONLY;
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else
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flags = O_RDONLY;
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snprintf(devname, sizeof(devname), "/dev/cpuctl%u", cpu);
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msr_fd[cpu] = open(devname, flags);
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if (msr_fd[cpu] < 0) {
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perror(devname);
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return 0;
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}
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return 1;
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#else
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return 0;
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#endif
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}
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int freebsd_close(uint8_t cpu)
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{
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if (cpu >= MAX_CORES)
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return 0;
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if (msr_fd[cpu] != -1)
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close(msr_fd[cpu]);
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msr_fd[cpu] = -1;
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return 1;
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}
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int freebsd_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val)
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{
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#ifdef __FreeBSD__
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cpuctl_msr_args_t args;
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if (cpu >= MAX_CORES)
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return 0;
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if (msr_fd[cpu] < 0)
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return 0;
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args.msr = addr;
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if (ioctl(msr_fd[cpu], CPUCTL_RDMSR, &args) < 0) {
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perror("ioctl(CPUCTL_RDMSR)");
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return 0;
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}
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val->hi = args.data >> 32;
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val->lo = args.data & 0xffffffff;
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return 1;
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#else
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return 0;
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#endif
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}
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