Example

This section describes a dbgBsp for the UltraSPARC CP1500 board. The source files for this example are in the source_dir/nucleus/bsp/usparc/cpxxxx/src/dbg directory. There are three files in this directory:

• dbgBsp.c

• ns16550Bsp.c

• epfpldBsp.c

• Imakefile

dbgBsp.c:

• Declares and initializes a dbgBsp structure (as defined in bki/dbgBsp.h)

• Implements the board reset function

• Calls the serial and watchdog driver initialization functions and initializes the dbgBsp field in the BootConf structure

• Contains dbgBsp_init, which is an entry point for dbgBsp

ns16550Bsp.c:

• The ns16550_inb(), ns16550_outb() functions provide access to device registers

• The ns16550_divisor() function calculates the divisor corresponding to a given baud rate, which is then used to program the baud rate in the generic driver

• The ns16550_ioremap() function is called each time the I/O space mapping is changed

epfpldBsp.c:

• The epfpld_init() function assigns an initial physical address to the watchdog device

• The epfpld_pat() function resets the watchdog counter if the system is stopped by the system debugger

• The epfpld_ioremap() function assigns a new physical address to the watchdog device

Imakefile:

• Builds the dbgBsp binary file from dbgBsp.o, ns16550.o and epfpld.o

• Includes $(DRV_DIST_BIN)/dbg/ns16550.o, $(DRV_DIST_BIN)/dbg/dbg/epfpld.o (the generic drivers) and $(DRV_DIST_BIN)/dbg/dbgUartConf.o (the serial line configuration) in the binary file

• Declares dbgBsp_init as the entry point