I'm thinking about adding these two fn's to target->type. It would
provide a polymorphic interface on top of which we can implement
general mrc/mcr commands.
Do we need anything but cp15? If not, then cpnum could be
omitted.
/* Read coprocessor - arm specific. Default implementation returns
error. */
int (*mrc)(struct target_s *target, int cpnum, uint32_t op1, uint32_t
op2, uint32_t CRn, uint32_t CRm, uint32_t *value);
/* Write coprocessor. Default implementation returns error. */
int (*mrc)(struct target_s *target, int cpnum, uint32_t op1, uint32_t
op2, uint32_t CRn, uint32_t CRm, uint32_t value);
Regarding command syntax, since we're omitting the register
to/from argument we're not 100% compatible with the machine code
syntax anyway.
For the mrc(read) operation, I was thinking about having the register
read returned as a Tcl result, so one could do:
set result [mrc x y ...]
I want the commands to be tcl friendly, on top of which we can implement
tcl wrappers for humans.
--
Øyvind Harboe
http://www.zylin.com/zy1000.html
ARM7 ARM9 ARM11 XScale Cortex
JTAG debugger and flash programmer
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