BSP and Device Driver Development Guide
Although not strictly part of initialization, there are a few global variables assumed to exist by reusable device drivers. These global variables should only defined by the BSP when using one of these device drivers.
The BSP author probably should be aware of the Configuration
Table structure generated by <rtems/confdefs.h> during debug but
should not explicitly reference it in the source code. There are helper
routines provided by RTEMS to access individual fields.
In older RTEMS versions, the BSP included a number of required global variables. We have made every attempt to eliminate these in the interest of simplicity.
BSP and Device Driver Development Guide
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