Advanced Configuration and Power Interface Specification

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ACPI Software Programming Model ......................................................... 101
5.1 Overview of the System Description Table Architecture .............................................. 101
5.1.1 Address Space Translation ............................................................................... 104
5.2 ACPI System Description Tables.................................................................................. 104
5.2.1 Reserved Bits and Fields .................................................................................. 105
5.2.2 Compatability .................................................................................................... 106
5.2.3 Address Format................................................................................................. 106
5.2.4 Universal Uniform Identifiers (UUID)................................................................. 108
5.2.5 Root System Description Pointer (RSDP)......................................................... 109
5.2.6 System Description Table Header .................................................................... 110
5.2.7 Root System Description Table (RSDT) ........................................................... 115
5.2.8 Extended System Description Table (XSDT) .................................................... 115
5.2.9 Fixed ACPI Description Table (FADT) .............................................................. 116
5.2.10 Firmware ACPI Control Structure (FACS)....................................................... 130
5.2.11 Definition Blocks.............................................................................................. 135
5.2.12 Multiple APIC Description Table (MADT)........................................................ 138
5.2.13 Global System Interrupts................................................................................. 154
5.2.14 Smart Battery Table (SBST) ........................................................................... 155
5.2.15 Embedded Controller Boot Resources Table (ECDT) .................................... 156
5.2.16 System Resource Affinity Table (SRAT) ......................................................... 158
5.2.17 System Locality Distance Information Table (SLIT) ........................................ 162
5.2.18 Corrected Platform Error Polling Table (CPEP) .............................................. 163
5.2.19 Maximum System Characteristics Table (MSCT) ........................................... 164
5.2.20 ACPI RAS FeatureTable (RASF) .................................................................... 166
5.2.21 Memory Power StateTable (MPST) ................................................................ 170
5.2.22 Boot Graphics Resource Table (BGRT).......................................................... 188
5.2.23 Firmware Performance Data Table (FPDT) .................................................... 190
5.2.24 Generic Timer Description Table (GTDT) ....................................................... 196
5.2.25 NVDIMM Firmware Interface Table (NFIT) ..................................................... 201
5.3 ACPI Namespace ........................................................................................................ 212
5.3.1 Predefined Root Namespaces .......................................................................... 214
5.3.2 Objects .............................................................................................................. 215
5.4 Definition Block Encoding ............................................................................................. 215
5.5 Using the ACPI Control Method Source Language ...................................................... 217
5.5.1 ASL Statements ................................................................................................ 218
5.5.2 Control Method Execution................................................................................. 219
5.6 ACPI Event Programming Model .................................................................................. 241
5.6.1 ACPI Event Programming Model Components................................................ 241
5.6.2 Types of ACPI Events ....................................................................................... 242
5.6.3 Fixed Event Handling ........................................................................................ 243
5.6.4 General-Purpose Event Handling ..................................................................... 243
5.6.5 GPIO-signaled ACPI Events ............................................................................. 248
5.6.6 Device Object Notifications ............................................................................... 250
5.6.7 Device Class-Specific Objects .......................................................................... 256
5.6.8 Predefined ACPI Names for Objects, Methods, and Resources....................... 258
5.7 Predefined Objects ....................................................................................................... 269
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