Use case : For Boot from Block device feature, As Block device is not Memory mapped, we need some agent to load the Initial firmware to Host memory. CSE takes care of it by mapping CSE internal SRAM to host memory of 4GB to 4 GB – 256 KB.
*Boot from Block Configuration Host Memory Map :* Current Implementation Future Recommendation POC on Current Implementation CSE Mapped host memory 4GB to 4GB – 256 KB 4GB to 4GB – 512KB 4GB to 4GB – 256 KB BIOS Flash Map Definition 4GB to 4GB – 256 KB à Empty Firmware volume ( *hole in flash map* ) 4GB – 256KB to 4GB – 10 MB ( BIOS Firmware Volumes) 4GB to 4GB – 512KB à Empty Firmware volume ( *hole in flash map* ) 4GB – 512 KB to 4GB – 10 MB ( BIOS Firmware Volumes) *Eliminate the Empty Firmware volume /hole in flash memory.* *(by shifting flash range by 256 KB as shown below)* Flash Map range 4GB to 4GB – 10 MB For 10 MB BIOS. 4GB to 4GB – 10 MB For 10 MB BIOS. 4GB *– 256 KB* to 4GB – 10 MB *– 256 KB* For 10 MB BIOS Below is the usage of this addition. @if "%BFX_BUILD%" == "TRUE" ( %WORKSPACE_PLATFORM%\%PLATFORM_FULL_PACKAGE%\Tools\FitGen_Split_Boot\FitGen.exe ^ -D ^ %BUILD_DIR%\FV\ClientBios.fd ^ %BUILD_DIR%\FV\ClientBios.fd ^ -F 0x40 ^ -NA ^ *-REMAP 0xFFF80000 ^* -L %SLOT_SIZE% %MICROCODE_ARRAY_FFS_GUID% ^ -I %BIOS_INFO_GUID% ^ %STARTUP_AC_PARA% ^ -O 0x0C RESERVE 0x600 ^ -O 0x0B RESERVE 0x400 ^ -P 0xA 0x70 0x71 0x1 0x4 0x2a ) %STARTUP_AC_PARA% ^ -O 0x0C RESERVE 0x600 ^ -O 0x0B RESERVE 0x400 ^ -P 0xA 0x70 0x71 0x1 0x4 0x2a -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#65713): https://edk2.groups.io/g/devel/message/65713 Mute This Topic: https://groups.io/mt/77189022/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
