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