6.2 Firmware Volumes
Stage IV finalizes silicon initialization, adds basic operating system required interfaces, and supports minimally featured operating system boot. The new components are support in a dedicated firmware volume.
Name | Content | Compressed | Parent FV |
FvOsBoot | DXE/BDS Services | Yes | None |
FvLateSilicon | ACPI and SMM silicon support | No | FvOsBoot |
Which yields this example extension of the flash map for MMIO storage (add to Stage I + II + III map):
Binary | FV | Components | Purpose |
Stage IV | FvOsBoot.fv | FvLateSilicon.fv (child FV) | |
| | Additional Components | Additional silicon initialization support that is performed late in the boot |
| | AcpiTable.efi | Provides common ACPI services |
| | PlatformAcpi.efi | Provides MinPlatform ACPI content |
| | BoardAcpi.efi | Provides board ACPI content |
| | PiSmmIpl.efi | SMM initial loader |
| | PiSmmCore.efi | SMM core services |
| | ReportStatusCodeRouterSmm.efi | SMM status code infrastructure |
| | StatusCodeHandlerSmm.efi | SMM status code handlers |
| | PiSmmCpu.efi | SMM CPU services |
| | CpuIo2Smm.efi | SMM CPU IO services |
| | FaultTolerantWriteSmm.efi | SMM fault tolerant write services |
| | SpiFvbServiceSmm.efi | SMM SPI FLASH services |
| | Additional Components | Additional post-memory components required for Stage IV boot |
Last modified 2yr ago