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* ARM11: don't expose DSCRDavid Brownell2009-12-022-185/+7
| | | | | | | | | | | Remove the remaining extra copy of DSCR, and the register cache of which it was a part. That cache wasn't a very safe, or even necessary, idea; it was essentialy letting debugger-private state be manipulated by Tcl code that couldn't know how to do it right. This makes the "reg" output of an ARM11 resemble what most other ARM cores produce ... forward motion in the "make ARM11 work like the rest of the ARM cores" Jihad!
* ARM11: store a clean copy of DSCRDavid Brownell2009-12-024-76/+56
| | | | | | | Just store a clean copy of DSCR in the per-CPU struct, so we trivially pass a pointer to a recent copy. This replaces the previous "last_dscr" and cleans up most of the related calling conventions ... but it doesn't remove the other DSCR copy.
* ARM11: don't expose WDTRDavid Brownell2009-12-022-14/+11
| | | | | | | | | Don't expose the WDTR register through the register cache any more. If anyone wants Tcl scripts to be able to use DCC based communication with app code in the target, this wouldn't do it. Bugfix: don't trust the Tcl-accessible version of DSCR to flag whether WDTR needs to be restored when resuming.
* ARM11: don't expose RDTRDavid Brownell2009-12-022-15/+11
| | | | | | | | | Don't expose the RDTR register through the register cache any more. If anyone wants Tcl scripts to be able to use DCC based communication with app code in the target, this wouldn't do it. Bugfix: don't trust the Tcl-accessible version of DSCR to flag whether RDTR needs to be restored when resuming.
* ARM11: streamline debug entryDavid Brownell2009-12-021-25/+20
| | | | | | | | | | | | | Streamline arm11_on_enter_debug_state() entry: - It should handle the standard updates: * target->debug_reason * target->state - Don't waste time re-reading DSCR; just pass it in Also rename the routine to "arm11_debug_entry()", matching the convention used elsewhere in OpenOCD.
* ARM11: remove arm11->targetDavid Brownell2009-12-023-20/+12
| | | | | Don't need/want arm11->target; we have arm11->arm.target instead. Also remove some unused watchpoint stuff.
* ARM DPM: tweak initializationDavid Brownell2009-12-026-23/+33
| | | | | | Move the initial breakpoint/watchpoint disable calls to arm_dpm_initialize(), and start using that routine. This split helps with arm11 support.
* adding files required for distributionZachary T Welch2009-12-021-0/+1
| | | | | Add headers missing from Makefile rules to pass 'make distcheck'. These were included in the tree but were not added with those commits.
* fix 'target init' command registrationZachary T Welch2009-12-021-6/+6
| | | | | The command handler registration was put at the top level, rather than as a subcommand. Move it to where it belongs.
* target: factor init to 'target init'Zachary T Welch2009-12-021-0/+23
| | | | Adds 'target init' command handler, called as part of 'init'.
* target: factor target_init() into piecesZachary T Welch2009-12-021-69/+84
| | | | | Moves body of target initialization loop into a helper function, cleaning up its visual flow in the process.
* ARMv7a/Cortex-A8: report watchpoint trigger insnDavid Brownell2009-12-025-44/+33
| | | | | | | | | | | Save and display the address of the instruction which triggered the watchpoint. Because of pipelining, that's well behind the PC value when debug entry completes. (Example in a subroutine that had been returned from...) Remove unused A8 stuff, mostly watchpoint hooks from the header. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: label SP and LR correctlyDavid Brownell2009-12-021-12/+12
| | | | | | | | | | | Except for USR/SYS mode, the labels for the shadowed SP and LR registers were reversed. LR is r14; SP is r13. Fix. This would not affect GDB users; GDB references are positional. Only folk working directly with OpenOCD register values would have noticed this bug. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-A8: basic watchpoint supportDavid Brownell2009-12-011-0/+66
| | | | | | | Actually this should handle both breakpoints and watchpoints ... but the DPM framework only handles watchpoints for now. Works on Beagle. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: core DPM support for watchpointsDavid Brownell2009-12-014-41/+302
| | | | | | | | | | | | | | | | | | | | | This is a NOP unless the underlying core exposes two new methods, and neither of the two cores using this (ARM11xx, Cortex-A8) do so yet. This patch only updates those cores so they pass a flag saying whether or not to update breakpoint and watchpoint status before resuming; and removing some now-needless anti-segfault code from ARM11. Cortex-A8 didn't have that code ... yes, it segfaulted when setting watchpoints. NOTE: this uses a slightly different strategy for setting/clearing breakpoints than the ARM7/ARM9/etc code uses. It leaves them alone unless it's *got* to change something, to speed halt/resume cycles (including single stepping). ALSO NOTE: this under-delivers for Cortex-A8, where regions with size up to 2 GBytes can be watched ... it handles watchpoints which ARM11 can also handle (size 1/2/4 bytes). Should get fixed later. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARMv7a: move constants out of Cortex-A8 headerDavid Brownell2009-12-012-35/+48
| | | | | | These are architecturally defined, not core-specific. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM11: remove previous mcr()/mrc() methodsDavid Brownell2009-12-011-75/+0
| | | | | | We don't need this code, now that the DPM code handles it. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-A8: remove previous mcr()/mrc() methodsDavid Brownell2009-12-012-104/+1
| | | | | | | | We don't need this code, now that the DPM code handles it. Neither do we need the ARMv7-A CP15 operations; remove their remnants too. And disable a mostly-needless diagnostic. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: implement mrc()/mcr() as DPM opsDavid Brownell2009-12-011-0/+59
| | | | | | | | | | | | | Instead of having separate ARM11 and Cortex-A8 implementations of this code, have one shared implementation which just builds on the existing "run instruction via R0" support. This enables followup patches to remove that now-unused code from those two drivers. (Patches to move the "mrc" and "mcr" code into "struct arm" are due too ... MIPS and other cores do not support those ARM-specific concepts.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: "mcr" and "mrc" are ARM-specificDavid Brownell2009-12-019-218/+228
| | | | | | | | | | | | | | Switch "mrc" and "mcr" commands to be toplevel ARM operations, as they should initially have been. Correct the usage message for both commands: it matches ARM documentation (as one wants!) instead of reordering them to match the funky mrc() and mcr() method usage (sigh). For Cortex-A8: restore a line that got accidentally dropped, so the secure monitor mode shadow registers will show again. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARMv7-A: stop using CP15 opsDavid Brownell2009-12-011-5/+36
| | | | | | | | | | | The ARMv7-A code uses read_cp15() to access fault registers. Instead, use DPM operations directly, passing in the relevant MRC instructions. This eliminates per-operation overhead (though it'll be hard to observe, this is uncommon) and helps eliminate read_cp15(). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-A8: stop using CP15 opsDavid Brownell2009-12-011-16/+53
| | | | | | | | | | | | | | | | | | | | | There were two chunks of Cortex-A8 code which called the ARMv7-A CP15 operations; get rid of them, helping prepare to remove those methods completely: - post_debug_entry() can use the mrc() method to read its two registers. - write_memory() can use dpm->instr_write_data_r0() to flush the ICache and DCache ... doing it this way is actually faster since it reduces per-write overhead. Note that the mrc() method parameters are re-ordered with respect to the ARM instruction documentation, so that part can be confusing. Cleaned up the layout and comments in those areas a bit. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* XScale: restore_context() cleanupDavid Brownell2009-11-301-38/+30
| | | | | | | | | | | Clean up two aspects to this routine: bad naming, since it doesn't restore the context, just the banked registers; and excess indentation for the bulk of the code. Also make some of its call sites stash the function's return code; someday they should use it for error checking. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* XScale: context restore, cleanup/bugfixDavid Brownell2009-11-301-15/+29
| | | | | | | | | | | | | | This "loop over all registers" routine shared the same mess as full_context() in terms of dozens of needless number_to_mode() calls. Fix that, and comments, with related cleanup. The misnamed xscale_restore_context() had a related bug. It was restoring the *WRONG REGISTERS* ... always from whatever the current mode was, instead of using the copy from whichever register bank it was trying to restore. (But it marked the intended register as having been restored...) Fixed that. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* do not extern 'interp' from command.cZachary T Welch2009-11-302-5/+7
| | | | | Adds 'interp' field to command_context, chasing the few remaining references to the global variable outside of the command module.
* target: avoid using interp global variableZachary T Welch2009-11-302-9/+11
| | | | | Adds 'interp' to target_event_action structure to avoid using the global variable of the same name.
* XScale: clean up full_context() (#2)David Brownell2009-11-291-39/+30
| | | | | | | Streamline the loop by continuing as soon as we know there's no work to be done; this lets us un-indent almost everything. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* XScale: clean up full_context() (#1)David Brownell2009-11-291-17/+32
| | | | | | | | | When fetching all the registers, XScale was doing various stupid things like calling number_to_mode() a few dozen times instead of just once, and mapping access to each register three times (again, instead of just once). Stop that. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* XScale: debug entry uses new register mappingDavid Brownell2009-11-291-9/+10
| | | | | | | | Use the new mapping interfaces in the debug entry path. SPSR and the banked registers now have smaller and faster accessors ... use them. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* XScale: initial PXA3xx supportMarek Vasut2009-11-292-11/+39
| | | | | | [dbrownell@users.sourceforge.net: user's guide; variant param is optional] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM11: fix warning on cygwinDavid Brownell2009-11-291-9/+22
| | | | | | Previous version of JTAG_DEBUG() macro hid this bug. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-M3: don't chain "struct arm" commandsDavid Brownell2009-11-281-3/+0
| | | | | | | | | | | | Those commands presume support for the "classic" set of CPU modes (FIQ, supervisor, IRQ, etc) ... which aren't supported by the ARMv7-M or ARMv6-M architectures. They also presume a "struct arm" base type, which this code doesn't use. We haven't cleaned up the register handling enough to be able to share any of those "base" methods. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* add more stub handlers to testee targetZachary T Welch2009-11-281-2/+22
| | | | Prevent everything from crashing when exercising various commands.
* explode tcl_target_func into many handlersZachary T Welch2009-11-281-387/+521
| | | | | | | | Eliminate the monolithic tcl_target_func by registering each of its commands using the new chained command registration mechanism. Also chains the target's commands under the CPU command, though these may not work properly without some further modification.
* split jim_target into multiple handlersZachary T Welch2009-11-281-109/+137
| | | | | | | | The 'target' command group was implemented using its own command dispatching, which can be eliminated by using the new chained command registration mechanism. This patch splits the jim_target() function into individual handlers, which makes them to be visible to the help and usage commands. These one-trick handlers are much easier to understand.
* ARM11: fix warning on amd64David Brownell2009-11-281-1/+4
| | | | | | Previous version of JTAG_DEBUG() macro hid this bug. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM11: fix dbgtap JTAG_DEBUGDavid Brownell2009-11-281-2/+2
| | | | | | | There is no DEBUG() macro; don't call one! Always at least *parse* debug code, to help prevent such errors. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: uplevel add_{break,watch}point() error checksDavid Brownell2009-11-286-38/+23
| | | | | | | | | | | | | | | | | | | | | | | | In target_type.h it's documented that the target must be halted for add_breakpoint() ... and with slight ambiguity, also for its add_watchpoint() sibling. So rather than verifying that constraint in the CPU drivers, do it in the target_add_{break,watch}point() routines. Add minor paranoia on the remove_*point() paths too: save the return value, and print it out in in the LOG_DEBUG message in case it's nonzero. Note that with some current cores, like all ARMv7 ones I've looked at, there's no technical issue preventing watchpoint or breakpoint add/remove operations on active cores. This model seems deeply wired into OpenOCD though. ALSO: the ARM targets were fairly "good" about enforcing that constraint themselves. The MIPS ones were relied on other code to catch such stuff, but it's not clear such code existed ... keep an eye out for new issues on MIPS. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: remove unused TARGET_EVENT_OLD_* symbolsDavid Brownell2009-11-281-2/+0
| | | | | | Just two *_OLD_* symbols left... Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-A8: support "reset-assert" eventDavid Brownell2009-11-271-5/+28
| | | | | | | | | | | | | | Use the new "reset-assert" event; else SRST; else fail. Tested on an OMAP3, using the event. NOTE: still doesn't handle "reset halt". For some reason neither VCR nor PRCR seemed effective; they held the value that was written, but VCR didn't trigger debug entry when the reset vector fired (maybe the vector needs configuring?) and PRCR refused to hold the chip in reset until deassert() could force the core into debug state. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: groundwork for "reset-assert" eventDavid Brownell2009-11-272-3/+21
| | | | | | | | | This defines a "reset-assert" event and a supporting utility routine, and documents both how targets should implement it and how config scripts should use it. Core-specific updates are needed to make this work. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM11: write_memory() avoids increment checkDavid Brownell2009-11-271-9/+19
| | | | | | | | | | | | When writing to a chip's "reset yourself" register, the ARM11 code was reporting a spurious failure. Just don't bother checking for correctly incremented pointers given single-unit writes ... it's a bit faster that way too. (Reads should likely do the same thing. For that matter, such checks are usually just a waste...) Shrink an overlong parameter name, and associated lines'o'code. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* XScale: add stub {read,write}_phys routinesDavid Brownell2009-11-261-0/+20
| | | | | | | | | Just make these fail, instead of letting them write over potentially random memory. Users should be able to work around the lack of real implementations by disbling the MMU by hand ... until someone provides a Real Fix. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: create and use target_name()David Brownell2009-11-254-19/+29
| | | | | | | | | | | | | Several of the sites now using target_type_name() really ought to be using an instance-specific name. Create a function called target_name(), accessing the instance's own (command) name. Use it in several places that really should be displaying instance-specific names. Also in several places which were already doing so, but which had no wrapper to call. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: target_get_name() --> target_type_name()David Brownell2009-11-256-15/+24
| | | | | | | | | | | | | There are two names that may matter on a per-target basis. One is a per-instance name (for example, "at91sam7s.cpu"). The other is the name of its type (for example, "arm7tdmi"), which is shared among multiple targets. Currently target_get_name() returns the type name, which is misleading and is rarely appropriate for target diagnostics. Rename that as target_type_name(). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: minor armv4/armv5 cleanupDavid Brownell2009-11-251-1/+12
| | | | | | Lines of 300+ characters are still bad; debug tweaks. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: comment tweaks in ADIv5David Brownell2009-11-251-2/+5
| | | | | | "OptimoDE DESS" is ARM's semicustom DSPish stuff. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM7/9: shrink run_algorithm_inner() linesDavid Brownell2009-11-251-2/+10
| | | | | | 300+ characters is unreasonable. So is half that. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* use ARRAY_SIZE macroZachary T Welch2009-11-255-24/+24
| | | | | Search and destroy lingering cases where the ARRAY_SIZE macro should be used to convey more intrinsic meaning in the OpenOCD code.
* add 'testee' target typeZachary T Welch2009-11-253-1/+52
| | | | | | | Alliteration aside, this should provide the final piece of the puzzle for developers that want to get started writing a new target type. In this way, it also seeks to complement the 'dummy' interface driver and 'faux' NOR flash driver.
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