RTEMS 4.9.4 On-Line Library

Initialization Code Board Initialization

BSP and Device Driver Development Guide

7.3: Board Initialization

Initialization Code Start Code - Assembly Language Initialization

Initialization Code boot_card() - Boot the Card

Initialization Code bsp_start() - BSP Specific Initialization

Initialization Code RTEMS Pretasking Callback

Initialization Code RTEMS Predriver Callback

Initialization Code Device Driver Initialization

Initialization Code RTEMS Postdriver Callback

This section describes the steps an application goes through from the time the first BSP code is executed until the first application task executes. The following figure illustrates the program flow during this sequence:

The above figure illustrates the flow from assembly language start code to the shared bootcard.c framework then through the C Library, RTEMS, device driver initialization phases, and the context switch to the first application task. After this, the application executes until it calls exit, rtems_shutdown_executive, or some other normal termination initiating routine and control is returned to bootcard.c which allows the BSP to perform some clanup in C (bsp_cleanup) and then boot_card returns to the assembly language which initially invoked it.

The routines invoked during this will be discussed and their location in the RTEMS source tree pointed out as we discuss each.

BSP and Device Driver Development Guide