This eliminates redundant code for parsing and retreiving the bank
specified from a script command argument.  This patch was written to
replace existing functionality; however, the parsing logic can be
updated later to allow flash commands to accept bank names as well as
their numbers.

Passes cmd_ctx into parse_load_image_command_args for reporting the
parsing errors therein.

This helper eliminates significant amount of redundant code in command
handler functions throughout the system.  It wraps the lower-level
parse_* macros to implement a policy for reporting parse errors to the
active command context (cmd_ctx).  If errors do occur, this macro causes
the calling function to abort with the proper return code.

The arm920t has a concept of read modify write cycles
that may have to be represented in the mrcmcr interface
eventually.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Now matches machine code syntax and old arm11 syntax.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

This avoids polluting help for targets that can never support mrc/mcr

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Fail watchpoint_add() if it's the same address but the
parameters are different ... don't just assume having
the same address means the same watchpoint!  (Note that
overlapping watchpoints aren't detected...)

Handle unrecognized return codes more sanely; don't exit()!
And describe command params right.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>