firmware services

[orangecms]

• BIOS
• UEFI (the interface)
  • https://trusted-services.readthedocs.io/en/integration/services/uefi-smm-services.html
  • https://uefi.org/sites/default/files/resources/UEFI_Plugfest_May_2015%20Firmware%20-%20Securing%20SMM.pdf
• SBI
• PSCI

also: peripheral firmware interfaces are similar to interfaces on the same processing core

processor modes

• RISC-V M-mode
• x86 SMM