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authorwdenk <wdenk>2002-11-02 23:30:20 +0000
committerwdenk <wdenk>2002-11-02 23:30:20 +0000
commite221174377d7e3ee848e014b96430d4c97023e93 (patch)
treecfaa85f367bc58b8770b3dabf4e9fd64121127bf /doc/README.bedbug
parent7ebf7443ad018a0647f549a835a55f0c08d7a15d (diff)
Initial revision
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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.