| Andriy Gapon | d80e57c | 2009-11-28 05:21:42 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of msrtool. |
| 3 | * |
| 4 | * Copyright (c) 2009 Andriy Gapon <avg@icyb.net.ua> |
| 5 | * Copyright (c) 2009 Peter Stuge <peter@stuge.se> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/stat.h> |
| 23 | #include <fcntl.h> |
| 24 | #include <unistd.h> |
| 25 | #include <string.h> |
| 26 | #include <errno.h> |
| 27 | |
| 28 | #include "msrtool.h" |
| 29 | |
| 30 | static int msr_fd[MAX_CORES] = {-1, -1, -1, -1, -1, -1, -1, -1}; |
| 31 | |
| 32 | int freebsd_probe(const struct sysdef *system) |
| 33 | { |
| 34 | #ifdef __FreeBSD__ |
| 35 | struct stat st; |
| 36 | |
| 37 | return stat("/dev/cpuctl0", &st) == 0; |
| 38 | #else |
| 39 | return 0; |
| 40 | #endif |
| 41 | } |
| 42 | |
| 43 | int freebsd_open(uint8_t cpu, enum SysModes mode) |
| 44 | { |
| 45 | #ifdef __FreeBSD__ |
| 46 | int flags; |
| 47 | char devname[32]; |
| 48 | |
| 49 | if (cpu >= MAX_CORES) |
| 50 | return 0; |
| 51 | |
| 52 | if (SYS_RDWR == mode) |
| 53 | flags = O_RDWR; |
| 54 | else if (SYS_WRONLY == mode) |
| 55 | flags = O_WRONLY; |
| 56 | else |
| 57 | flags = O_RDONLY; |
| 58 | |
| 59 | snprintf(devname, sizeof(devname), "/dev/cpuctl%u", cpu); |
| 60 | msr_fd[cpu] = open(devname, flags); |
| 61 | if (msr_fd[cpu] < 0) { |
| 62 | perror(devname); |
| 63 | return 0; |
| 64 | } |
| 65 | return 1; |
| 66 | #else |
| 67 | return 0; |
| 68 | #endif |
| 69 | } |
| 70 | |
| 71 | int freebsd_close(uint8_t cpu) |
| 72 | { |
| 73 | if (cpu >= MAX_CORES) |
| 74 | return 0; |
| 75 | |
| 76 | if (msr_fd[cpu] != -1) |
| 77 | close(msr_fd[cpu]); |
| 78 | msr_fd[cpu] = -1; |
| 79 | return 1; |
| 80 | } |
| 81 | |
| 82 | int freebsd_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val) |
| 83 | { |
| 84 | #ifdef __FreeBSD__ |
| 85 | cpuctl_msr_args_t args; |
| 86 | |
| 87 | if (cpu >= MAX_CORES) |
| 88 | return 0; |
| 89 | |
| 90 | if (msr_fd[cpu] < 0) |
| 91 | return 0; |
| 92 | |
| 93 | args.msr = addr; |
| 94 | if (ioctl(msr_fd[cpu], CPUCTL_RDMSR, &args) < 0) { |
| 95 | perror("ioctl(CPUCTL_RDMSR)"); |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | val->hi = args.data >> 32; |
| 100 | val->lo = args.data & 0xffffffff; |
| 101 | return 1; |
| 102 | #else |
| 103 | return 0; |
| 104 | #endif |
| 105 | } |