diff options
Diffstat (limited to 'src/geode_msr.c')
| -rw-r--r-- | src/geode_msr.c | 50 |
1 files changed, 46 insertions, 4 deletions
diff --git a/src/geode_msr.c b/src/geode_msr.c index b7c56d9..8f57939 100644 --- a/src/geode_msr.c +++ b/src/geode_msr.c @@ -33,18 +33,36 @@ #include <fcntl.h> #include <sys/types.h> #include <errno.h> + +#ifdef __OpenBSD__ +#include <sys/ioctl.h> +#include <machine/amdmsr.h> +#endif + #include "os.h" #include "geode.h" +#ifdef __OpenBSD__ +#define _PATH_MSRDEV "/dev/amdmsr" +#define X_PRIVSEP +#else +#define _PATH_MSRDEV "/dev/cpu/0/msr" +#endif + static int _msr_open(void) { static int msrfd = 0; if (msrfd == 0) { - msrfd = open("/dev/cpu/0/msr", O_RDWR); +#ifdef X_PRIVSEP + msrfd = priv_open_device(_PATH_MSRDEV); +#else + msrfd = open(_PATH_MSRDEV, O_RDWR); +#endif if (msrfd == -1) - ErrorF("Unable to open /dev/cpu/0/msr: %d\n", errno); + FatalError("Unable to open %s: %s\n", _PATH_MSRDEV, + strerror(errno)); } return msrfd; @@ -53,6 +71,19 @@ _msr_open(void) int GeodeReadMSR(unsigned long addr, unsigned long *lo, unsigned long *hi) { +#ifdef __OpenBSD__ + struct amdmsr_req req; + int fd = _msr_open(); + + req.addr = addr; + + if (ioctl(fd, RDMSR, &req) == -1) + FatalError("Unable to read MSR at address %0x06x: %s\n", addr, + strerror(errno)); + + *hi = req.val >> 32; + *lo = req.val & 0xffffffff; +#else unsigned int data[2]; int fd = _msr_open(); int ret; @@ -72,13 +103,24 @@ GeodeReadMSR(unsigned long addr, unsigned long *lo, unsigned long *hi) *hi = data[1]; *lo = data[0]; - +#endif return 0; } int GeodeWriteMSR(unsigned long addr, unsigned long lo, unsigned long hi) { +#ifdef __OpenBSD__ + struct amdmsr_req req; + int fd = _msr_open(); + + req.addr = addr; + req.val = (u_int64_t) hi << 32 | (u_int64_t)lo; + + if (ioctl(fd, WRMSR, &req) == -1) + FatalError("Unable to write MSR at address 0x%06x: %s\n", addr, + strerror(errno)); +#else unsigned int data[2]; int fd = _msr_open(); @@ -93,6 +135,6 @@ GeodeWriteMSR(unsigned long addr, unsigned long lo, unsigned long hi) if (write(fd, (void *) data, 8) != 8) return -1; - +#endif return 0; } |