A METHOD TO USE GLOBAL VARIABLES FOR PRE-EFI INITIALIZATION MODULES IN EFI-BASED FIRMWARE

摘要

The method for enabling global variable read / write operations in the pre-EFI initialization (PEI) is disclosed. The method includes generating a driver image. The driver image includes at least a section of code (i.e., text section), a data section, a relocation section. First round fixing on the driver image is performed to adjust the absolute non-volatile memory has the address of all address data items. The second round fixing on the driver image is performed to adjust the data has the first section as the absolute all address data items adjusted in round fixing that points to the address cache RAM (Cache-As-Random Access Memory). The adjusted image is recorded in the non-volatile memory device. The non-volatile memory device to boot when the data section of a driver image record is copied into the RAM as a cache (CAR) and have a read / write access from the by executing the executable code of the text section is static and global variables CAR is. ; Free EFI, global variables, static variables, drivers, image, round adjustment