upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/doc/README.bedbug

1.9 KiB

BEDBUG Support for U-Boot
--------------------------

These changes implement the bedbug (emBEDded deBUGger) debugger in U-Boot.
A specific implementation is made for the AMCC 405 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/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
AMCC 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()

New Files:

cpu/mpc8xx/bedbug_860.c
CPU-specific routines for 860 debug registers.