static status_t
amd_stdops(int32 op, ...)
{
switch (op) {
case B_MODULE_INIT:
return amd_init();
case B_MODULE_UNINIT:
return B_OK;
}
return B_ERROR;
}
// returns 0 for success or negative for failure
//int kern_pmc_init(struct pmc_info *info)
int kern_pmc_init(void)
{
int status = STATUS_UNKNOWN_CPU_INIT;
struct pmc_info info;
ULONG64 cr4;
if (!cpu_id(&info)) return STATUS_NO_CPUID;
// we need to at least support MSR registers, RDTSC, & RDPMC
if(!(info.features & MSR)) return STATUS_NO_MSR;
if(!(info.features & TSC)) return STATUS_NO_TSC;
if(!(info.features & MMX)) return STATUS_NO_MMX; // assume MMX tracks RDPMC
if (!strncmp(info.vendor, "GenuineIntel", 12)) status = intel_init(info.family,info.stepping,info.model);
else if (!strncmp(info.vendor, "AuthenticAMD", 12)) status = amd_init(info.family);
// we really don't need to claim support for Cyrix, do we?
// else if (!strncmp(info.vendor, "CyrixInstead", 12)) status = cyrix_init(info.family);
if(status == STATUS_SUCCESS) set_cr4_pce();
return status;
}
