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author | Stefan Reinauer <stepan@coresystems.de> | 2009-08-19 10:46:23 +0000 |
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committer | Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> | 2009-08-19 10:46:23 +0000 |
commit | 173e3eaabef842e3ad785f3c3c510bf4122deff9 (patch) | |
tree | ffb21185452182d795e4fb5eeb3b1d2834d172aa /physmap.c | |
parent | dfade10e393d43b9b37c4866da032e31f910b0b6 (diff) | |
download | flashrom-173e3eaabef842e3ad785f3c3c510bf4122deff9.tar.gz flashrom-173e3eaabef842e3ad785f3c3c510bf4122deff9.tar.bz2 flashrom-173e3eaabef842e3ad785f3c3c510bf4122deff9.zip |
Support rdmsr/wrmsr operations on FreeBSD
So far, AMD Geode LX is the only user of this infrastructure. It needs
/dev/cpu0 from ports/sysutils on FreeBSD during runtime on Geode LX.
Corresponding to flashrom svn r690.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Idwer Vollering <vidwer@gmail.com>
Acked-by: <putlinuxonit@gmail.com>
Diffstat (limited to 'physmap.c')
-rw-r--r-- | physmap.c | 86 |
1 files changed, 86 insertions, 0 deletions
@@ -215,6 +215,91 @@ void cleanup_cpu_msr(void) fd_msr = -1; } #else +#if defined(__FreeBSD__) || defined(__DragonFly__) +#include <sys/ioctl.h> + +typedef struct { + int msr; + uint64_t data; +} cpu_msr_args_t; +#define CPU_RDMSR _IOWR('c', 1, cpu_msr_args_t) +#define CPU_WRMSR _IOWR('c', 2, cpu_msr_args_t) + +static int fd_msr = -1; + +msr_t rdmsr(int addr) +{ + cpu_msr_args_t args; + + msr_t msr = { 0xffffffff, 0xffffffff }; + + args.msr = addr; + + if (ioctl(fd_msr, CPU_RDMSR, &args) < 0) { + perror("CPU_RDMSR"); + close(fd_msr); + exit(1); + } + + msr.lo = args.data & 0xffffffff; + msr.hi = args.data >> 32; + + return msr; +} + +int wrmsr(int addr, msr_t msr) +{ + cpu_msr_args_t args; + + args.msr = addr; + args.data = (((uint64_t)msr.hi) << 32) | msr.lo; + + if (ioctl(fd_msr, CPU_WRMSR, &args) < 0) { + perror("CPU_WRMSR"); + close(fd_msr); + exit(1); + } + + return 0; +} + +int setup_cpu_msr(int cpu) +{ + char msrfilename[64]; + memset(msrfilename, 0, 64); + sprintf(msrfilename, "/dev/cpu%d", cpu); + + if (fd_msr != -1) { + printf("MSR was already initialized\n"); + return -1; + } + + fd_msr = open(msrfilename, O_RDWR); + + if (fd_msr < 0) { + perror("Error while opening /dev/cpu0"); + printf("Did you install ports/sysutils/devcpu?\n"); + return -1; + } + + return 0; +} + +void cleanup_cpu_msr(void) +{ + if (fd_msr == -1) { + printf("No MSR initialized.\n"); + return; + } + + close(fd_msr); + + /* Clear MSR file descriptor */ + fd_msr = -1; +} + +#else + #ifdef __DARWIN__ int setup_cpu_msr(int cpu) { @@ -251,4 +336,5 @@ void cleanup_cpu_msr(void) } #endif #endif +#endif |