longrun(1) [redhat man page]

LONGRUN(1)						      General Commands Manual							LONGRUN(1)

NAME

       Transmeta(TM) Crusoe(TM) LongRun(TM) utility

SYNOPSIS

       longrun [-c device] [-m device] [-hlpv] [-f flag] [-s low high]

DESCRIPTION

       The longrun utility is used to control and query LongRun settings on Transmeta Crusoe processors.

       -c device
	      Set the CPUID device.  The default CPUID device is /dev/cpu/0/cpuid.

       -m device
	      Set the MSR device.  The default CPUID device is /dev/cpu/0/msr.

       -h     Print help.

       -l     List LongRun information about available performance levels for the CPU.

	      The following values are reported on all Transmeta CPUs that implement LongRun.

		 %	An  available  performance  level, expressed as a percentage of range of available core CPU frequencies.  0 corresponds to
			the lowest available frequency and 100 corresponds to the highest.

		 MHz	The core CPU frequency at that level.

		 Volts	The core CPU voltage at that level.

		 usage	The power usage relative to the maximum performance level.

       -p     Print current LongRun settings and status: whether LongRun is enabled, whether LongRun Thermal Extensions are  active,  the  current
	      LongRun performance window (expressed as a percentile range), the current LongRun performance level (expressed as a percentile), and
	      the current LongRun flags.

       -v     Be more verbose.

       -f flag
	      Set a LongRun mode flag.	Currently, the two supported flags are performance and economy.  This controls whether the processor is in
	      "performance mode" or "economy mode".

       -s low high
	      Set  the	current  LongRun  performance  window  as a percentile range.  The low number cannot be greater than the high number.  The
	      minimum and maximum performance values accepted by the CPU are 0 and 100, respectively.

ENVIRONMENT

       No environment variables are used.

FILES

       This program requires that the Linux CPUID and MSR devices be compiled into the kernel (or  loaded  as  kernel  modules),  that	the  CPUID
       character device be readable, and that the MSR character device be both readable and writable.

SEE ALSO

       acpid(8), apmd(8), hdparm(8)

AUTHOR

       Daniel Quinlan <quinlan@transmeta.com>

								 February 14, 2001							LONGRUN(1)

CPUCTL(4)						   BSD Kernel Interfaces Manual 						 CPUCTL(4)

NAME

     cpuctl -- cpuctl pseudo device

SYNOPSIS

     To compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device cpuctl

     Alternatively, to load the driver as a module at boot time, place the following in loader.conf(5):

	   cpuctl_load="YES"

DESCRIPTION

     The special device /dev/cpuctl presents interface to the system CPU.  It provides functionality to retrieve CPUID information, read/write
     machine specific registers (MSR) and perform CPU firmware updates.

     For each CPU present in the system, the special device /dev/cpuctl%d with the appropriate index will be created.  For multicore CPUs such a
     special device will be created for each core.

     Currently, only i386 and amd64 processors are supported.

IOCTL INTERFACE

     All of the supported operations are invoked using the ioctl(2) system call.  Currently, the following ioctls are defined:

     CPUCTL_RDMSR cpuctl_msr_args_t *args

     CPUCTL_WRMSR cpuctl_msr_args_t *args
			 Read/write CPU machine specific register.  The cpuctl_msr_args_t structure is defined in <sys/cpuctl.h> as:

			 typedef struct {
				 int		 msr;	 /* MSR to read */
				 uint64_t	 data;
			 } cpuctl_msr_args_t;

     CPUCTL_MSRSBIT cpuctl_msr_args_t *args

     CPUCTL_MSRCBIT cpuctl_msr_args_t *args
			 Set/clear MSR bits according to the mask given in the data field.

     CPUCTL_CPUID cpuctl_cpuid_args_t *args
			 Retrieve CPUID information.  Arguments are supplied in the following structure:

			 typedef struct {
				 int		 level; 	 /* CPUID level */
				 uint32_t	 data[4];
			 } cpuctl_cpuid_args_t;
			 It is equivalent to the CPUCTL_CPUID_COUNT request with level_type set to 0.

     CPUCTL_CPUID_COUNT cpuctl_cpuid_count_args_t *args
			 Retrieve CPUID information.  Arguments are supplied in the following structure:

			 typedef struct {
				 int		 level; 	 /* CPUID level */
				 int		 level_type;	 /* CPUID level type */
				 uint32_t	 data[4];
			 } cpuctl_cpuid_count_args_t;
			 The level field indicates the CPUID level to retrieve, it is loaded into the %eax register before the CPUID instruction
			 is executed, The level_type field indicates the CPUID level type to retrieve, it is loaded into the %ecx register.

			 The data field is used to store the received CPUID data.  That is, data[0] contains the value of %eax register after the
			 CPUID instruction is executed, data[1] is for %ebx, data[2] for %ecx, and data[3] for %edx.

     CPUCTL_UPDATE cpuctl_update_args_t *args
			 Update CPU firmware (microcode).  The structure is defined in <sys/cpuctl.h> as:

			 typedef struct {
				 void	 *data;
				 size_t  size;
			 } cpuctl_update_args_t;

			 The data field should point to the firmware image of size size.

     For additional information refer to cpuctl.h.

RETURN VALUES

     [ENXIO]		The operation requested is not supported by the device (e.g., unsupported architecture or the CPU is disabled).

     [EINVAL]		Incorrect request was supplied, or microcode image is not correct.

     [ENOMEM]		No physical memory was available to complete the request.

     [EFAULT]		The firmware image address points outside the process address space.

FILES

     /dev/cpuctl

SEE ALSO

     hwpmc(4), cpucontrol(8)

HISTORY

     The cpuctl driver first appeared in FreeBSD 7.2.

AUTHORS

     The cpuctl module and this manual page were written by Stanislav Sedov <stas@FreeBSD.org>.

BUGS

     Yes, probably, report if any.

BSD
								   June 20, 2014							       BSD