What is a BSP(Board Support Package)?

In embedded systems, a board support package (BSP) is an implementation of specific support code (software) for a given (device motherboard) board that conforms to a given operating system. It is commonly built with a bootloader that contains the minimal device support to load the operating system and device drivers for all the devices on the board.

Some suppliers also provide a root file system, a toolchain for building programs to run on the embedded system (which would be part of the architecture support package), and utilities to configure the device (while running).

Example

The Wind River board support package for the ARM Integrator 920T board contains, among other things, the following elements:

• A config.h file, which defines constants such as ROM_SIZE and RAM_HIGH_ADRS.
• A Makefile, which defines binary versions of VxWorks ROM images for programming into flash memory.
• A bootrom file, which defines the boot line parameters for the board.
• A target.ref file, which describes board-specific information such as switch and jumper settings, interrupt levels, and offset bias.
• A VxWorks image.
• Various C files, including:

flashMem.c — the device driver for the board's flash memory

pciIomapShow.c — mapping file for the PCI bus

primeCellSio.c — TTY driver

sysLib.c — system-dependent routines specific to this board

romInit.s — ROM initialization module for the board; contains entry code for images that start running from ROM

A board support package (BSP) is essential code code for a given computer hardware device that will make that device work with the computer's OS (operating system). The BSP contains a small program called a boot loader or boot manager that places the OS and device drivers into memory. The contents of the BSP depend on the particular hardware and OS.

Specific tasks that the BSP performs include the following, in order:

• Initialize the processor.
• Initialize the bus.
• Initialize the interrupt controller.
• Initialize the clock.
• Initialize the RAM (random access memory) settings.
• Configure the segments (if applicable).
• Run the boot loader.

In addition to the foregoing, a BSP can contain directives, compilation parameters, and hardware parameters for configuring the OS.

for more information click on below link

https://www.windriver.com/products/bsp_web/what_is_a_bsp.pdf