A method for managing use of a fixed memory space of a computer system is provided. The computer system interfaces with controllers for managing operation of devices that operate with the computer system. The method includes determining whether sufficient memory is allocated in the fixed memory space for initializing code for the controllers, and jumping to swappable portion of the fixed memory space. The method also includes executing code in the swappable portion of the fixed memory space. The method further includes loading additional code needed to initialize the controllers from an external memory chip to the fixed memory space where the additional code is executed to complete initialization of the controllers of the computer system.
A structure of embedded memory unit with loader comprises a main memory area and an information area as a part of the main memory area. A plurality of loader-program parts is dispersedly stored in different addresses of the main memory area, wherein the loader-program parts are combined to form a complete loader. A loader mapping area is used to store the loader-program during the boot stage. When the boot sequence starts, the original information stored in the loader mapping area is temporarily backup to a temporary space; and the released space is used to store the loader-program. After the boot sequence is completed, the original information is moved back to the original location.
