Xilinx OS and Libraries Overview - 2020.2 English

The Standard C support library consists of the newlib, libc, which contains the standard C functions such as stdio, stdlib, and string routines. The math library is an enhancement over the newlib math library, libm, and provides the standard math routines. The LibXil libraries consist of the following:

• LibXil Driver (Xilinx device drivers)
• XilMFS (Xilinx memory file system)
• XilFlash (a parallel flash programming library)
• XilIsf (a serial flash programming library)

The Hardware Abstraction Layer (HAL) provides common functions related to register I/O, exception, and cache. These common functions are uniform across MicroBlaze™ and Cortex A9 processors. The Standalone platform document provides some processor specific functions and macros for accessing the processor-specific features. Most routines in the library are written in C and can be ported to any platform. User applications must include appropriate headers and link with required libraries for proper compilation and inclusion of required functionality. These libraries and their corresponding include files are created in the processor \lib and \include directories, under the current project, respectively. The -I and -L options of the compiler being used should be leveraged to add these directories to the search paths.

Your application can interface with the components in a variety of ways. The libraries are independent of each other, with the exception of some interactions. The LibXil drivers and the Standalone form the lowermost hardware abstraction layer. The library and OS components rely on standard C library components. The math library, libm.a is also available for linking with the user applications. Taking into account some restrictions and implications, which are described in the reference guides for each component, you can mix and match the component libraries.