MTRR(4) - Device Drivers Manual (amd64) # MTRR(4) - Device Drivers Manual (amd64)
NAME # mtrr - driver for CPU memory range attributes
SYNOPSIS # pseudo-device mtrr 1
DESCRIPTION # The mtrr device provides access to the memory range attributes supported by the MTRRs on AMD64 compatible CPUs.
IOCTL INTERFACE # Several architectures allow attributes to be associated with ranges of physical memory. These attributes can be manipulated via ioctl() calls performed on /dev/mem or /dev/xf86.
...
MTRR(4) - Device Drivers Manual (i386) # MTRR(4) - Device Drivers Manual (i386)
NAME # mtrr - driver for CPU memory range attributes
SYNOPSIS # pseudo-device mtrr 1
DESCRIPTION # The mtrr device provides access to the memory range attributes supported by the MTRRs on Pentiums.
IOCTL INTERFACE # Several architectures allow attributes to be associated with ranges of physical memory. These attributes can be manipulated via ioctl() calls performed on /dev/mem or /dev/xf86.
...
XF86(4) - Device Drivers Manual # XF86(4) - Device Drivers Manual
NAME # xf86 - X Window System aperture driver
SYNOPSIS # option APERTURE
DESCRIPTION # On the alpha, amd64, i386, macppc, and sparc64 architectures, the /dev/xf86 driver provides access to the memory and I/O ports of a VGA board and to the PCI configuration registers for use by the X servers when running with a kernel security level greater than 0.
...