| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #include "msrtool.h" |
| |
| /* This Darwin support requires DirectHW, which is available at |
| * https://www.coreboot.org/DirectHW |
| */ |
| |
| int darwin_probe(const struct sysdef *system) |
| { |
| #ifdef __DARWIN__ |
| return iopl(3) == 0; |
| #else |
| return 0; |
| #endif |
| } |
| |
| int darwin_open(uint8_t cpu, enum SysModes mode) |
| { |
| #ifdef __DARWIN__ |
| if (cpu > 0) { |
| fprintf(stderr, "%s: only core 0 is supported on Mac OS X right now.\n", __func__); |
| return 0; |
| } |
| return 1; |
| #else |
| return 0; |
| #endif |
| } |
| |
| int darwin_close(uint8_t cpu) |
| { |
| return 1; |
| } |
| |
| int darwin_rdmsr(uint8_t cpu, uint32_t addr, struct msr *val) |
| { |
| #ifdef __DARWIN__ |
| msr_t msr; |
| |
| msr = rdmsr(addr); |
| |
| val->hi = msr.lo; |
| val->lo = msr.hi; |
| return 1; |
| #else |
| return 0; |
| #endif |
| } |