The semantics of "-work-area-virt 0" (or phys) changed with
the patch to require specifying physical or virtrual work
area addresses. Specifying zero was previously a NOP. Now
it means that address zero is valid.
This patch addresses three related issues:
- MMU-less processors should never specify work-area-virt;
remove those specifications. Such processors include
ARM7TDMI, Cortex-M3, and ARM966.
- MMU-equipped processors *can* specify work-area-virt...
but zero won't be appropriate, except in mischievous
contexts (which hide null pointer exceptions).
Remove those specs from those processors too. If any of
those mappings is valid, someone will need to submit a
patch adding it ... along with a comment saying what OS
provides the mapping, and in which context. Example,
say "works with Linux 2.6.30+, in kernel mode". (Note
that ARM Linux doesn't map kernel memory to zero ...)
- Clarify docs on that "-virt" and other work area stuff.
Seems to me work-area-virt is quite problematic; not every
operating system provides such static mappings; if they do,
they're not in every MMU context...
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Without some extra delay after releasing SRST, we seemed to
be trying to talk to the TAP before it was ready to respond.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Split out OSK5912 board support from the omap5912 target config, and make
it pass sanity checks on my (Rev C/original) hardware:
- Fix syntax error ("-irlen" not "irlen")
- Provide real TAP ids for the ARM926ejs and the C55x dsp
- Label both CPUs appropriately (DSP, ARM)
- List both flash chips
The scan chain looks like this (note truncated DSP instruction code):
TapName | Enabled | IdCode Expected IrLen IrCap IrMask Instr
---|--------------------|---------|------------|------------|------|------|------|---------
0 | omap5912.dsp | Y | 0x03df1d81 | 0x03df1d81 | 0x26 | 0x00 | 0x00 | 0xffffffff
1 | omap5912.arm | Y | 0x0692602f | 0x0692602f | 0x04 | 0x01 | 0x00 | 0x0c
2 | omap5912.unknown | Y | 0x00000000 | 0x00000000 | 0x08 | 0x00 | 0x00 | 0xff
I still don't know what that third TAP is; maybe an early version of
an ICEpick JTAG router.
git-svn-id: svn://svn.berlios.de/openocd/trunk@1974 b42882b7-edfa-0310-969c-e2dbd0fdcd60
- Move src/tcl to tcl/.
- Update top Makefile.am to use new path name.
git-svn-id: svn://svn.berlios.de/openocd/trunk@1919 b42882b7-edfa-0310-969c-e2dbd0fdcd60
David Brownell
dbrownell
zwelch