PlatformReset

Overview

DXE Runtime Reset Driver for the Purley platform that installs the EFI_RESET_ARCH_PROTOCOL and provides the ResetSystem runtime service. Handles cold reset, warm reset, shutdown, and platform-specific reset types through PCH SMBus controller access and PCH reset registers, with PCI Express MMIO configuration support.

Key Functions

• PlatformResetEntryPoint -- Main entry, installs Reset Architecture Protocol
• PlatformResetSystem -- Runtime ResetSystem handler (cold/warm/shutdown/platform)
• PlatformResetDriverEntryPoint -- Initialize globals, register events, configure PCIe MMIO
• PlatformResetUnload -- Driver unload, cleanup events and mappings
• nullsub_1 -- Null notification callback

Dependencies

• gEfiResetArchProtocolGuid -- Reset Architecture Protocol
• PCI Express MMIO configuration space
• PCH SMBus controller
• PCD Protocol

Platform

Intel Purley (Xeon Scalable), PCH LBG. x86-64 UEFI Runtime Driver.