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BEDBUG Support for U-Boot
--------------------------
These changes implement the bedbug (emBEDded deBUGger) debugger in U-Boot.
A specific implementation is made for the IBM405 processor but other flavors
can be easily implemented.
#####################
### Modifications ###
#####################
./common/Makefile
Included cmd_bedbug.c and bedbug.c in the Makefile.
./common/command.c
Added bedbug commands to command table.
./common/board.c
Added call to initialize debugger on startup.
./cpu/ppc4xx/Makefile
Added bedbug_405.c to the Makefile.
./cpu/ppc4xx/start.S
Added code to handle the debug exception (0x2000) on the 405.
Also added code to handle critical exceptions since the debug
is treated as critical on the 405.
./cpu/ppc4xx/traps.c
Added more detailed output for the program exception to tell
if it is an illegal instruction, privileged instruction or
a trap. Also added debug trap handler.
./include/cmd_confdefs.h
Added definition of CFG_CMD_BEDBUG.
./include/config_WALNUT405.h
Added CFG_CMD_BEDBUG to the CONFIG_COMMANDS for the WALNUT.
./include/ppc_asm.tmpl
Added code to handle critical exceptions
#################
### New Stuff ###
#################
./include/bedbug/ppc.h
./include/bedbug/regs.h
./include/bedbug/bedbug.h
./include/bedbug/elf.h [obsoleted by new include/elf.h]
./include/bedbug/tables.h
./include/cmd_bedbug.h
./common/cmd_bedbug.c
./common/bedbug.c
Bedbug library includes code for assembling and disassembling
PowerPC instructions to/from memory as well as handling
hardware breakpoints and stepping through code. These
routines are common to all PowerPC processors.
./cpu/ppc4xx/bedbug_405.c
IBM PPC405 specific debugger routines.
Bedbug support for the MPC860
-----------------------------
Changes:
common/cmd_bedbug.c
Added call to initialize 860 debugger.
cpu/mpc8xx/Makefile
Added new file "bedbug_860.c" to the makefile
cpu/mpc8xx/start.S
Added handler for InstructionBreakpoint (0xfd00)
cpu/mpc8xx/traps.c
Added new routine DebugException()
include/config_MBX.h
Added CFG_CMD_BEDBUG to CONFIG_COMMANDS define
New Files:
cpu/mpc8xx/bedbug_860.c
CPU-specific routines for 860 debug registers.
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