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* ADIv5 clean up AP selection and register cachingDavid Brownell2010-02-214-34/+60
| | | | | | | | | | | | | | | | | | | Handling of AP (and AP register bank) selection, and cached AP registers, is pretty loose ... start tightening it: - It's "AP bank" select support ... there are no DP banks. Rename. + dap_dp_bankselect() becomes dap_ap_bankselect() + "dp_select_value" struct field becomes "ap_bank_value" - Remove duplicate AP cache init paths ... only use dap_ap_select(), and don't make Cortex (A8 or M3) cores roll their own code. - For dap_ap_bankselect(), pass up any fault code from writing the SELECT register. (Nothing yet checks those codes.) - Add various bits of Doxygen Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: keep a handle to the PCDavid Brownell2010-02-2116-88/+106
| | | | | | | | | | | | | | | | Keep a handle to the PC in "struct arm", and use it. This register is used a fair amount, so this is a net minor code shrink (other than some line length fixes), but mostly it's to make things more readable. For XScale, fix a dodgy sequence while stepping. It was initializing a variable to a non-NULL value, then updating it to handle the step-over-active-breakpoint case, and then later testing for non-NULL to see if it should reverse that step-over-active logic. It should have done like ARM7/ARM9 does: init to NULL. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM DPM: support adding/removing HW breakpointsDavid Brownell2010-02-211-38/+113
| | | | | | | | | | | | | | Generalize the core of watchpoint setup so that it can handle breakpoints too. Create breakpoint add/remove routines which will use that, and hook them up to target types which don't provide their own breakpoint support (nothing, yet). This suffices for hardware-only breakpoint support. The ARM11 code will be able to switch over to this without much trouble, since it doesn't yet handle software breakpoints. Switching Cortex-A8 will be a bit more involved. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM11: per-core options should not be globalDavid Brownell2010-02-212-33/+44
| | | | | | | | | | Address some FIXME comments by getting rid of globals, moving per-core parameters in the existing per-core data structure. This will matter most whenever there are multiple ARM11 cores, e.g. ARM11 MPcore chips, but in general is just cleanup. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARMv7-M: start using "struct arm"David Brownell2010-02-215-9/+74
| | | | | | | | | | | | | | | | | | | | | | | | | | | This sets up a few of the core "struct arm" data structures so they can be used with ARMv7-M cores. Specifically, it: - defines new ARM core_modes to match the microcontroller modes (e.g. HANDLER not IRQ, and two types of thread mode); - Establishes a new microcontroller "core_type", which can be used to make sure v7-M (and v6-M) cores are handled right; - adds "struct arm" to "struct armv7m" and arranges for the target_to_armv7m() converter to use it; - sets up the arm.core_cache and arm.cpsr values - makes the Cortex-M3 code maintain arm.map and arm.core_mode. This is currently set up as a parallel data structure, primarily to minimize special cases for the semihosting support with microcontroller profile cores. Later patches can rip out the duplicative ARMv7-M support and start reusing core ARM code. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* arm920t line length cleanupDavid Brownell2010-02-201-115/+247
| | | | | | | | | | | | The recent patch to fixbreakpoints and dcache handling added a bunch of overlong lines (80+ chars) ... shrink them, and do the same to a few lines which were already overlong. Also add a few FIXME comments to nudge (a) replacement of some magic numbers with opcode macros, which will be much better at showing what's actually going on, and (b) correct return codes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* atm920t : fix breakpoints and data cache handlingMarc Pignat2010-02-191-17/+103
| | | | | | | | | Breakpoints did not work because the data cache was not flushed properly. As a bonus add capability to write to memory marked as read only by the MMU, which allows software breakpoints in such memory regions.
* ARM920T scanchain 15 comments/cleanupDavid Brownell2010-02-161-51/+112
| | | | | | | | | | | | | | | | | For folk who don't know the ARM920 JTAG interface very well, the two modes of scan chain 15 access to CP15 are confusing. Make those parts of the ARM920 code less opaque, by: - Adding comments referencing the relevant parts of the TRM, catching up to similar updates in the User's Guide. - Replacing magic numbers in physical access clients with symbolic equivalents. No functional change. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* fix crash with DSP563XXMathias Kuester2010-02-141-0/+25
| | | | | | | | | | | When a DSP563xx-aware GDB asks OpenOCD for target registers, the result should be a GDB with register data ... not an OpenOCD crash. (Note that mainline GDB doesn't currently support this core, so for now, this requires a GDB with FreeScale patches.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* arm720t: virt2phys callback addedØyvind Harboe2010-02-121-4/+14
| | | | | | | | This is a copy and paste of arm926ejs. Not tested, but ready for testing at least. There is a good chance that it will work if the generic armv4_5 fn's are robust enough... Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* arm920: add virt2phys fnMarc Pignat2010-02-121-3/+13
| | | | | | | Copy of the 926ejs function. I have tested it only using my rtems application (where virtual address mapping == physical). Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* arm11: fix another infinite loop bugØyvind Harboe2010-02-101-4/+23
| | | | | | | | | | | | | reset init would get stuck in an infinite loop when e.g. khz was too high. Added timeout. This is a copy of paste of a number of such bugfixes in the arm11 code. Arm11 code reviewed for further such infinite loop bugs and I couldn't find any more. Xing fingers it's the last one... Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* target: add todo in target_write_memory() about alignmentØyvind Harboe2010-02-091-2/+13
| | | | | | | target_write_buffer() does not align "buffer" in host memory passed to target_write_memory(). Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* ADIv5: doxygenDavid Brownell2010-02-062-32/+138
| | | | | | | | | | | | | | | | | Provide doxygen for many of the public ADIv5 interfaces (i.e. the ones called from Cortex core support code). Add FIXMEs (and a TODO) to help resolve implementation issues which became more apparent when trying to document this code: - Error-prone context-sensitivity (queued/nonqueued) in many procedures. - Procedures that lie by ignoring errors and wrongly claiming success. Also, there was no point in a return from dap_ap_select(); it can't fail, and no caller checks its return status. Clean that up, make it void. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARMv7-M: make DAP commands verify target is an ARMv7-MDavid Brownell2010-02-042-3/+31
| | | | | | | | Init the ARMv7-M magic number. Define predicate verifying it. Use it to resolve a lurking bug/FIXME: make sure the ARMv7-M specific DAP ops reject non-ARMv7-M targets. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM semihosting: fix EOF handling with SYS_READNicolas Pitre2010-02-021-1/+1
| | | | | | | | The semihosting interface has a strange convention for read/write where the unused amount of buffer must be returned. We failed to return the total buffer size when the local read() call returned 0. Signed-off-by: Nicolas Pitre <nico@marvell.com>
* gdb: restore behavior from 0.3.1 for srst_asserted and power_restoreØyvind Harboe2010-02-011-13/+23
| | | | | | | | srst_asserted and power_restore can now be overriden to do nothing. By default they will "reset init" the targets and halt gdb. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* ADIv5: more messaging cleanup, docsDavid Brownell2010-01-311-12/+20
| | | | | | | | | When the TAR cache was explicitly invalidated, don't bother printing it; the actual hardware status is more informative. Provide some doxygen for the MEM-AP setup routine. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* build: fix problems with "struct stat" not being defined under eCosØyvind Harboe2010-01-311-0/+1
| | | | | | | Include <sys/stat.h> according to http://www.opengroup.org/onlinepubs/000095399/functions/stat.html Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* Subject: ADIv5: fix more diagnosticsDavid Brownell2010-01-311-9/+16
| | | | | | | | | | | If the MEM-AP cache is invalid, don't display it; just report that invalidity as an error. (This bug has been observed with "mdw 0 32" after just a "reset halt". Some code is being wrongly bypassed...) If it's valid, display that cache at DEBUG level, not ERROR. Also, don't assume it's an AHB-AP; it could be another flavor of MEM-AP. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ADIv5 error checking for Tcl commandsDavid Brownell2010-01-301-1/+17
| | | | | | | | | Reject invalid AP numbers (256+) as Tcl operation parameters. Shrink one of the overlong lines. Add my copyright to the ADIv5 code (multiple contributions). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM ADIv5: fix diagnostics for block writesDavid Brownell2010-01-301-5/+14
| | | | | | They were reporting "read" errors, not "write" errors. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ADIv5: cleanup, rename swjdp_transaction_endcheck()David Brownell2010-01-293-34/+43
| | | | | | | | | | | | | | | | Make messages reference "DAP" if they're actually transport-agnostic, or "JTAG-DP" when they're JTAG-specific. Saying SWJ-DP is often wrong (on most Cortex-A8 chips) and is confusing even if correct (since we don't yet support SWD). Rename a JTAG-specific routine to jtagdp_transaction_endcheck() to highlight that it's JTAG-specific, and that identify DAP clients undesirably depending on JTAG. (They will all need to change for SWD support.) Shrink a few overlong lines of code. Copy a comment from code removed in a previous patch (for the ARMv7-M "dap baseaddr" command). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARMv7-M: use command handler for "dap baseaddr".David Brownell2010-01-291-30/+1
| | | | | | | | | | Make the ARMv7-M DAP code reuse the command handler for "dap baseaddr". For some reason, this DAP command wasn't converted earlier. This is a code shrink and simplification; it also removes a needless transport dependency on JTAG. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM: reference DPM defn from v6/v7 arch specDavid Brownell2010-01-281-0/+6
| | | | | | | | The term "DPM" is probably not well known ("Device Power Management"?), so identify its source in the current ARM architecture specification. It's relevant to ARMv6, ARMv7-A, and ARMv7-R ... but not "M" profiles. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM semihosting: win32 and cygwin fixesSpencer Oliver2010-01-281-16/+26
| | | | | | | | | | | | Cygwin would fail to reopen a previously written file if the mode is not given. Simplified converting the open flags and made sure the win32 O_BINARY bit is set. Added define for systems that do not support O_BINARY. Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
* ARM semihosting: fix writing to stdoutSpencer Oliver2010-01-281-8/+4
| | | | | | | | SYS_FLEN would be called before a write on a descriptor to check its size. Currently lseek would fail with -1 when given the stdout/stderr descriptor. Changing to use fstat seems to be the standard way of handling this. Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
* Cortex-M3: report lockup, and recoverDavid Brownell2010-01-271-0/+15
| | | | | | | | | | | | ARMv7-M defines a "lockup" state that's entered in certain double fault sequences which can't be recovered from without external help. OpenOCD has previously ignored this. Issue a diagnostic saying the chip has locked up, and force exit from this state by halting the core. It's not clear this is the best way to handle lockup; but there should now be less confusion. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM ADIv5: messaging tweaksDavid Brownell2010-01-271-2/+5
| | | | | | | Add space missing after the invalid ACK value. On init, say which AP is being used, and don't assume it's an AHP-AP. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-A8: debug messaging tweaksDavid Brownell2010-01-271-5/+6
| | | | | | | Make that "TODO" message say what needs to be done. Say what part of examining failed. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* core arm11: Silence logs at level 3 if there is no activityEdgar Grimberg2010-01-251-1/+1
| | | | | | | | If the target and openocd are idling, the log should normally be silent at level 3. (Given no verbose logging options.) Signed-off-by: Edgar Grimberg <edgar.grimberg@zylin.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* EmbeddedICE - fix Feroceon/Dragonite messageDavid Brownell2010-01-221-2/+9
| | | | | | | The breakpoint/watchpoint message was wrong for Feroceon and Dragonite, which have only one working watchpoint unit. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM11: fix breakpoints with GDBDavid Brownell2010-01-221-9/+15
| | | | | | | | | | | This fixes a bug whereby GDB's breakpoints weren't activated. The root cause is a confused interface to resume(). Fix by almost ignoring the "handle breakpoints" parameter; it only seems related to the case of skipping breakpoint-at-PC. Update a few coments to clarify what's happening. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Various doc/comment updatesDavid Brownell2010-01-211-0/+1
| | | | | | | | Doxygen: don't be needlessly verbose; alphabetically sort members TODO: add random bits; clarify which manuals are referenced ARM disassembler: mention a few opcodes that still aren't handled Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ADIv5 header cleanup (+ #defines)David Brownell2010-01-211-7/+27
| | | | | | | | | | Update the comments about DP registers and some of the bitfields. Remove inappropriate (and unused) DP_ZERO declaration. Add some (currently unused) #defines needed for SWD protocol support, based on previous patches from Andreas Fritiofson and Simon Qian. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* target: print reason why GDB haltsØyvind Harboe2010-01-211-0/+10
| | | | | | | | | | | If GDB halts unexpectedly, print reason: srst assert or power out detected. If polling fails, then things are a bit trickier. We do not want to spam telnet or the log with polling failed messages. Leave that case be w/a comment in a code for now. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* target: Fixed format problem for mdhEdgar Grimberg2010-01-211-1/+1
| | | | | | Fixed format problem for mdh. It needs to display 4 chars. Signed-off-by: Edgar Grimberg <edgar.grimberg@zylin.com>
* BUILD: remove cygwin gcc 3.4.4 build warningsSpencer Oliver2010-01-203-4/+4
| | | | Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
* arm7/9: add nags upon reset about options to improve performanceØyvind Harboe2010-01-201-0/+10
| | | | | | arm7_9 fast_memory_access and working area nags added. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* ARMV7M: handle bkpt instruction on resume/stepSpencer Oliver2010-01-203-2/+63
| | | | | | | | | | Skip over a bkpt instruction if found on resume/step. Only software breakpoints known to OpenOCD are currently handled. So this handles the special case of either a user added bkpt or library added, eg. semi-hosting support. Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
* ADIv5 improved diagnosticDavid Brownell2010-01-151-2/+3
| | | | | | | Don't just complain about an invalid ACK; say what the value was, to help troubleshooting. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM DPM: disable some nyet-ready breakpoint codeDavid Brownell2010-01-151-6/+14
| | | | | | | | Until we manage breakpoints at runtime (patches not ready for 0.4) the only way this code should touch them is to disable them at server startup (a previous debug session may have left them active). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM ADIv5: add commentsDavid Brownell2010-01-141-1/+27
| | | | | | | Add doxygen and other comments for what's more or less the lowest level JDAG-DP primitive, to access JTAG_DP_{A,D}PACC registers. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM7/ARM9: improved reset supportDavid Brownell2010-01-141-14/+23
| | | | | | | | | | Teach most remaining ARM cores how to use the "reset-assert" event. Same model as elsewhere: iff a handler is provided for that event, use that instead of trying to assert SRST (which may be unavailable, or inappropriate since it resets too much). Else no change. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* ARM7/9 minor cleanupsDavid Brownell2010-01-141-16/+34
| | | | | | | Shrink some overlong lines. Add my 2009 copyright. Move a declaration to the beginning of its block. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* Cortex-M3: improved core exception handlingDavid Brownell2010-01-132-23/+31
| | | | | | | | | | | | | | | | | | | | | | This updates three aspects of debugger/exception interactions: - Save the user's "vector_catch" setting, and restore it after reset. Previously, it was obliterated (rather annoyingly) each time. - Don't catch BusFault and HardFault exceptions unless the user says to do so. Target firmware may need to handle them. - Don't modify SHCSR to prevent escalating BusFault to HardFault. Target firmware may expect to handle it as a HardFault. Those simplifications fix several bugs. In one annoying case, OpenOCD would cause the target to lock up on ome faults which triggered after the debugger disconnected. NOTE: a known remaining issue is that OpenOCD can still leave DEMCR set after an otherwise-clean OpenOCD shutdown. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
* arm7/9: enable check that DCC downloads have been enabledØyvind Harboe2010-01-138-0/+9
| | | | Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* arm7/9: add fn to check if dcc downloads have been enabledØyvind Harboe2010-01-132-1/+13
| | | | | | | | DCC downloads should be enabled for any self repecting openocd config file for arm7/9. Print out note about it otherwise. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* target: add check_reset hookØyvind Harboe2010-01-133-1/+46
| | | | | | | Allow targets to run checks post reset. Used to check that e.g. DCC downloads have been enabled. Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
* ARM: bugfix for "movt" disassemblyDavid Brownell2010-01-121-1/+1
| | | | | | | Use the correct bitfield to specify the register whose top halfword gets replaced. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
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