IA32_CR4 Union Reference


Data Fields

struct {
   UINT32   VME:1
 Virtual-8086 Mode Extensions.
   UINT32   PVI:1
 Protected-Mode Virtual Interrupts.
   UINT32   TSD:1
 Time Stamp Disable.
   UINT32   DE:1
 Debugging Extensions.
   UINT32   PSE:1
 Page Size Extensions.
   UINT32   PAE:1
 Physical Address Extension.
   UINT32   MCE:1
 Machine Check Enable.
   UINT32   PGE:1
 Page Global Enable.
   UINT32   PCE:1
   UINT32   OSFXSR:1
   UINT32   OSXMMEXCPT:1
   UINT32   Reserved_0:2
 Reserved.
   UINT32   VMXE:1
 VMX Enable.
   UINT32   Reserved_1:18
 Reserved.
Bits
UINTN UintN

Detailed Description

Byte packed structure for Control Register 4 (CR4). 32-bits on IA-32. 64-bits on x64. The upper 32-bits on x64 are reserved.

Field Documentation

struct { ... } IA32_CR4::Bits

Debugging Extensions.

Machine Check Enable.

Operating System Support for FXSAVE and FXRSTOR instructions

Operating System Support for Unmasked SIMD Floating Point Exceptions.

Physical Address Extension.

Performance Monitoring Counter Enable.

Page Global Enable.

Page Size Extensions.

Protected-Mode Virtual Interrupts.

Reserved.

Reserved.

Time Stamp Disable.

Virtual-8086 Mode Extensions.

VMX Enable.


Generated on Wed Sep 23 16:24:28 2015 for MdePkg[ALL] by  doxygen 1.5.7.1