Chapter 59. CPU Identification

The Previous Chapter

This chapter described the hardware and software characteristics of the Pentium® M processor as well as an overview of the Centrino chipset. It included:

• The Pentium® M and Centrino.

• Characteristics Overview.

• The FSB Characteristics.

• Enhanced Power Management Characteristics.

• Three Different Packaging Models.

• Improved Thermal Monitor Mode.

• Enhanced Branch Prediction.

• μop Fusion.

• Advanced Stack Management.

• Hardware-Based Data Prefetcher.

• The L2 Cache.

• The Data Cache and Hyper-Threading.

• The Next Pentium® M.

This Chapter

This chapter provides a detailed description of the CPUID instruction. It includes:

• Prior to the Advent of the CPUID Instruction.

• Determining if the CPUID instruction Is Supported.

• Determining Basic Request Types Supported.

• Determining Extended Request Types Supported.

• The Basic Request Types.

• Request Type 1.

• Request Type 2.

• Request Type 3.

• Request Type 4.

• Request Type 5.

• The Extended Request Types.

• Enhanced Processor Signature.

The Next Chapter

This chapter provides a detailed description of System Management Mode (SMM). It includes:

• What Falls Under the Heading of System Management?

• The Genesis of SMM.

• SMM Has Its Own Private Memory Space.

• The Basic Elements of SMM.

• How the Processor Knows the SM Memory Start Address.

• The Organization of SM RAM.

• Entering SMM.

• Exiting SMM.

• The Auto Halt Restart Feature.

• The IO Instruction Restart Feature.

• Caching from SM Memory.

• Setting Up the SMI Handler in SM Memory.

• Relocating the SM RAM Base Address.

• SMM in an MP System.