RTEMS 4.8.1 On-Line Library

Initialization Code boot_card() - Boot the Card

BSP and Device Driver Development Guide

The boot_card() is the first C code invoked. Most of the BSPs use the same shared version of boot_card() which is located in the following file:

c/src/lib/libbsp/shared/main.c

The boot_card() routine performs the following functions:

initializes the shared fields of the CPU Configuration Table (variable name Cpu_table) to a default state,
copies the application's RTEMS Configuration Table (variable name Configuration) to the BSP's Configuration Table (variable name BSP_Configuration) so it can be modified as necessary without copying the original table,
invokes the BSP specific routine bsp_start(),
invokes the RTEMS directive rtems_initialize_executive_early() to initialize the executive, C Library, and all device drivers but return without initiating multitasking or enabling interrupts,
invokes the shared main() in the same file as boot_card() which does not return until the rtems_shutdown_executive directive is called, and
invokes the BSP specific routine bsp_cleanup() to perform any necessary board specific shutdown actions.

It is important to note that the executive and much of the support environment must be initialized before invoking main().

BSP and Device Driver Development Guide