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Commit Graph

101 Commits

Author SHA1 Message Date
Matthias Welwarsky
b551c62a7f cortex_a: fix handling of Thumb-2 32bit breakpoints
When debugging Thumb-2 code, Gdb will at times send a
breakpoint packet 'Z0,<addr>,3', the number 3 denoting that
the instruction to break on is 32 bits long. Handle this by
replacing it with two consecutive 16bit Thumb BKPTs and make
sure to save and restore the full, original 32bit
instruction.

Note that this fix is only applicable if you debug a bare-metal program
(like the linux kernel) with the 'wrong' gdb, e.g. use an 
"arm-linux" gdb instead of an "arm-eabi" gdb. But since most people
may not know about the subtle differences between gdb configurations
regarding thumb2 breakpoints it's still valid.

Change-Id: Ib93025faf35b11f0dba747a8c1fc36fd09a4c0f8
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4241
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Tested-by: jenkins
2018-02-21 08:20:28 +00:00
Matthias Welwarsky
78a4b6607e cortex_a: faster debug init
Don't use atomic dap operations when not necessary

Change-Id: Idc6dcd2bda95f7994852df4ae2a588976f4c9010
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/4142
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2018-02-07 18:10:52 +00:00
Matthias Welwarsky
4afa32ece1 aarch64: unify armv7-a and armv8 debug entry decoding
Make DSCR_RUN_MODE() usable for armv8 and arm7 debug

Change-Id: Ib3ba3000d5b6aa03e590f3ca4969e677474eb12c
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
2017-02-10 14:01:39 +01:00
David Ung
9cbfc9feb3 arm_dpm: Add new state ARM_STATE_AARCH64
Add new enum ARM_STATE_AARCH64 to the list of possible states.

Change-Id: I3cb2df70f8d5803a63d8374bf3eb75de988e24f8
Signed-off-by: David Ung <david.ung.42@gmail.com>
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
2017-02-10 13:52:52 +01:00
Dongxue Zhang
47b8cf8420 target: Add 64-bit target address support
Define a target_addr_t type to support 32-bit and 64-bit addresses at
the same time. Also define matching TARGET_PRI*ADDR format macros as
well as a convenient TARGET_ADDR_FMT.

In targets that are 32-bit (avr32, nds32, arm7/9/11, fm4, xmc1000)
be least invasive by leaving the formatting unchanged apart from the
type;
for generic code adopt TARGET_ADDR_FMT as unified address format.

Don't silently change gdb formatting here, leave that to later.

Add COMMAND_PARSE_ADDRESS() macro to abstract the address type.
Implement it using its own parse_target_addr() function, in the hopes
of catching pointer type mismatches better.

Add '--disable-target64' configure option to revert to previous 32-bit
target address behavior.

Change-Id: I2e91d205862ceb14f94b3e72a7e99ee0373a85d5
Signed-off-by: Dongxue Zhang <elta.era@gmail.com>
Signed-off-by: David Ung <david.ung.42@gmail.com>
[AF: Default to enabling (Paul Fertser), rename macros, simplify]
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
2017-02-10 13:50:17 +01:00
Paul Fertser
d491b88dd9 target: cortex_a: fix segfault when SPSR is not properly handled
OpenOCD doesn't (yet) know how to handle HYP mode properly so spsr
register is not getting initialised when OpenOCD connects to a target
stopped in this mode.

Reported on IRC by thinkfat and nearffxx.

Change-Id: I4bda9ba0c582c8e9cacefe708cc4a3d947151f84
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/3906
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Chengyu Zheng <chengyu.zheng@polimi.it>
2016-12-25 09:23:56 +00:00
Matthias Welwarsky
cdba6ba0ad cortex_a: fix reset for SWD transport
Change b0698501b0 fixed
reset for i.MX6 and TI Sitara SoCs but broke reset for
cortex-a targets that use SWD. This patch is a work-
around that forces asserting SRST when SWD is used.

Change-Id: I7e39f2a469b9b4b2b74ad48ba49f2eeb58528921
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3641
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2016-12-08 13:03:49 +00:00
Steven Stallion
c0e7ccbd87 semihosting: support fileio operation
This patch adds support for bridging semihosting to GDB's File-I/O
remote protocol extension. For the most part operations match up 1:1,
however some require a working area to complete successfully, namely
operations that devolve to read, stat, and gettimeofday.

A new command was added to enable support for fileio named `arm
semihosting_fileio`, which ensures that the default behavior remains
intact for those that prefer it.

Finally, redundant logging was removed from the target_arch_state
function; this permits ARM targets to quiesce log output when polling
for a fileio reply. This prevents filling the logs with halt/resume
messages when using semihosting fileio.

Change-Id: Ifbb864fc2373336a501cc0332675b887b552e1ee
Signed-off-by: Steven Stallion <stallion@squareup.com>
Reviewed-on: http://openocd.zylin.com/3566
Tested-by: jenkins
Reviewed-by: Steven Stallion <sstallion@gmail.com>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2016-12-08 12:32:58 +00:00
Evan Hunter
3b021e013f Cortex-R: Force usage of physical memory read/write since there is no MMU
Change-Id: I69d6e6301ab66744258fe650a76c7241bebe00a8
Signed-off-by: Evan Hunter <ehunter@broadcom.com>
Reviewed-on: http://openocd.zylin.com/3203
Tested-by: jenkins
Reviewed-by: Girts Folkmanis <opensource@girts.me>
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Jiri Kastner <cz172638@gmail.com>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2016-12-08 12:30:00 +00:00
Matthias Welwarsky
0a2f1b29e6 cortex_a: remove partnum magic from arp_examine and dbginit
Depending on the Debug implementation the "OS Lock" feature might be
implemented or not. It is not actually depending on the part number of the
implemented ARM core but on the DBGOSLSR.OSLM bits. This patch removes
querying the part number and implements proper parsing of OSLM. Result is
a more generic approach that will work out-of-box on more devices.

Change-Id: I79e052869c2f9af1d7fdedef42faddb7292e7332
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3213
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2016-12-08 12:25:35 +00:00
Matthias Welwarsky
0099430104 cortex_a/r/m: fix handling of un-examined cores
On multi-core systems, with some cores in power-down state, examination
will fail for these cores. Make sure assert- and deassert_reset functions
don't crash due to uninitialized variables.

Change-Id: I472f8d19af2cd3c770c05f3e57a31b35a863b687
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3552
Tested-by: jenkins
Reviewed-by: Jiri Kastner <cz172638@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
2016-11-04 21:25:11 +00:00
Andrey Smirnov
d1bdcdcc8d semihosting armv7a: Add support for ARMv7-A
Add semihosting support for ARMv7-A based processors.

Tested with custom Vybrid VF610 based board
and Pandaboard ES (Rev. B1) board (Cortex-A9).

Change-Id: I6b896a61c1c6a1c5dcf89de834486f82dd6c80a2
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Tsung-Han Lin <tsunghan.tw@gmail.com>
Reviewed-on: http://openocd.zylin.com/2908
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Tested-by: jenkins
2016-11-04 21:21:50 +00:00
Marc Schink
d0e763ac7e Remove FSF address from GPL notices
Also make GPL notices consistent according to:
https://www.gnu.org/licenses/gpl-howto.html

Change-Id: I84c9df40a774958a7ed91460c5d931cfab9f45ba
Signed-off-by: Marc Schink <openocd-dev@marcschink.de>
Reviewed-on: http://openocd.zylin.com/3488
Tested-by: jenkins
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2016-05-24 22:30:01 +01:00
Andreas Färber
0c8ec7c826 Fix spelling of ARM Cortex
It's Cortex-Xn, not Cortex Xn or cortex xn or cortex-xn or CORTEX-Xn
or CortexXn. Further it's Cortex-M0+, not M0plus.

Cf. http://www.arm.com/products/processors/index.php

Consistently write it the official way, so that it stops propagating.
Originally spotted in the documentation, it mainly affects code comments
but also Atmel SAM3/SAM4/SAMV, NiietCM4 and SiM3x flash driver output.

Found via:

  git grep -i "Cortex "
  git grep -i "Cortex-" | grep -v "Cortex-" | grep -v ".cpu"
  git grep -i "CortexM"

Change-Id: Ic7b6ca85253e027f6f0f751c628d1a2a391fe914
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/3483
Tested-by: jenkins
Reviewed-by: Marc Schink <openocd-dev@marcschink.de>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2016-05-20 21:38:03 +01:00
Andreas Fritiofson
8f26fa3c0f cortex_a: Rename APB-AP to CPU in memory contexts
Memory accesses are not made through the APB-AP, they are made through
the CPU (which happens to be controlled over the APB-AP). Rename all
irrelevant uses of the APB-AP term. And fix the long standing typo in
the function names...

Change-Id: Ide466fb2728930968bdba698f0dd9012cc9dbdf9
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3216
Tested-by: jenkins
Reviewed-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
2016-05-20 21:17:03 +01:00
Matthias Welwarsky
b0698501b0 cortex_a: fix cortex_a_assert_reset() if srst_gates_jtag
The cortex_a specific assert_reset function must only apply nSRST if
the reset configuration states that JTAG can be used while nSRST is
asserted.

Change-Id: If604a65fdea5bcb46ec723ada547a4e8d6fa8c59
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3356
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
2016-05-08 09:22:09 +01:00
Tomas Vanek
8825804273 target: improve robustness of reset command
Before this change jim_target_reset() checked examined state of a target
and failed without calling .assert_reset in particular target layer
(and without comprehensible warning to user).
Cortex-M target (which refuses access to DP under active SRST):
If connection is lost then reset process fails before asserting SRST
and connection with MCU is not restored.
This resulted in:
1) A lot of Cortex-M MCUs required use of reset button or cycling power
after firmware blocked SWD access somehow (sleep, misconfigured clock etc).
If firmware blocks SWD access early during initialization, a MCU could
become completely inaccessible by SWD.
2) If OpenOCD is (re)started and a MCU is in a broken state unresponsive
to SWD, reset command does not work even if it could help to restore communication.
Hopefully this scenario is not possible under full JTAG.

jim_target_reset() in target.c now does not check examined state
and delegates this task to a particular target. All targets have been checked
and xx_assert_reset() (or xx_deassert_reset()) procedures were changed
to check examined state if needed. Targets except arm11, cortex_a and cortex_m
just fail if target is not examined although it may be possible to use
at least hw reset. Left as TODO for developers familiar with these targets.

cortex_m_assert_reset(): memory access errors are stored
instead of immediate returning them to a higher level.
Errors from less important reads/writes are ignored.
Requested reset always leads to a configured action.

arm11_assert_reset() just asserts hw reset in case of not examined target.
cortex_a_assert_reset() works as usual in case of not examined target.

Change-Id: I84fa869f4f58e2fa83b6ea75de84440d9dc3d929
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/2606
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2016-05-05 07:42:24 +01:00
Matthias Welwarsky
b6c4a5db3e cortex_a: allow physical memory access through AHB-AP again
This feature is required for boards that use a programmatical way
to reset the cpu, like the TI Pandaboard with OMAP4. The board only
has a 14 pin JTAG header that doesn't feature SRST and is reset by
direct write to the PRM_RSTCTL register.

iMX6 can be reset through triggering the on-chip watchdog, but for these
methods to work reliably, access through the AHB-AP without interaction
with the CPU core is necessary.

Change-Id: I9a07a536adda83cc2f93e504384c8c7f0306220b
Signed-off-by: Matthias Welwarsky <matthias.welwarsky@sysgo.com>
Reviewed-on: http://openocd.zylin.com/3359
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2016-03-24 12:32:43 +00:00
Evan Hunter
9721e9dd71 Cortex-A/R: Fix Mask-ISR parsing
Remove needless error when not halted with wrong return.
Allow usage in any mode
Add error message for incorrect arguments

Change-Id: I3e94e159609351e503ed3f35760503079e3aa53c
Signed-off-by: Evan Hunter <ehunter@broadcom.com>
Reviewed-on: http://openocd.zylin.com/3195
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2016-02-29 20:26:13 +00:00
Evan Hunter
4fef1d5bb0 Cortex-A/R: Add missing timeout for loop polling DSCR & fix timeout types
Change-Id: I345658cfdc8a34a98418727423ac6bd562e980f3
Signed-off-by: Evan Hunter <ehunter@broadcom.com>
Reviewed-on: http://openocd.zylin.com/3201
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2016-02-29 20:23:54 +00:00
Evan Hunter
76b1983202 Cortex-A: Fix unicode quote in comment
Change-Id: I4747c113ab6c02199f078d9b4a4ec372d011fb2d
Signed-off-by: Evan Hunter <ehunter@broadcom.com>
Reviewed-on: http://openocd.zylin.com/3200
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2016-01-12 23:22:35 +00:00
Matthias Welwarsky
5bee7f5b2c cortex_a: add 'dacrfixup' to cortex-a command group
work around issues with software breakpoints when the text segment
is mapped read-only by the OS. Set DACR to "all-manager" to bypass
TLB permission checks on memory access.

Change-Id: I79fd9b32b04a4d538d489896470ee30b26b72b30
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3107
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2015-12-29 21:43:45 +00:00
Matthias Welwarsky
45b897873d cortex_a: select APB-AP as the default AP
Debug initialization blindly selects AP#0 as default, which is the AHB-AP
in many cases. This sets the default for target_read/write functions.
However, AHB-AP is the wrong choice, because it bypasses caches on read
and write and also makes some peripherals inaccessible (e.g. l2 outer
caches). This patch explicitely selects the APB-AP (debug_ap) as the
default.

Change-Id: I13f9e0750186d35dcfc135c8d67d437c5884d9c4
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3113
Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2015-12-29 20:33:16 +00:00
Andreas Fritiofson
d84c7d9196 cortex: Set default memaccess_tck only during examine
It's currently set during target creation but the AP that will be used
for the target is not even known.

Change-Id: I4502e7eb1fa8d90f746445b8cf8a4c21cb7d519e
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3155
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:31:55 +00:00
Andreas Fritiofson
4a7bb931e3 arm_adi_v5: Remove all mem_ap_sel_* functions
All mem_ap_* functions now make sure the SELECT register is updated with
the AP number that it's operating on. This shouldn't have to be handled
explicitly.

Change-Id: Ib193d8930fabb6a25715064355f98258c9580b5d
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3153
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:31:19 +00:00
Andreas Fritiofson
00dbc185ee arm_adi_v5: Split ahbap_debugport_init
This function does two separate things, powering up the DP and setting
up a MEM-AP. But the DP needs to be powered before even searching for a
MEM-AP to initialize and targets may have multiple MEM-APs that need
initializing.

Split the function into dap_dp_init() and mem_ap_init() and change all
call sites to use the appropriate one.

Change-Id: I92f55e09754a93f3f01dd8e5aa1ffdf60c856126
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3151
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:29:46 +00:00
Andreas Fritiofson
8a069b7b90 arm_adi_v5: Change mem_ap calls to take pointer to AP and not DAP
Change-Id: I8d3e42056aa5828cb917ca578a54b7d53846a150
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3149
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:29:14 +00:00
Andreas Fritiofson
f9dfbf3ac7 cortex_a: Find debug base using the detected APB-AP and not AP 1
Change-Id: I6b98c3b4486903029e5a0d6d964bd5c48ff55926
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3148
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:28:45 +00:00
Andreas Fritiofson
557aa6dc5c arm_adi_v5: Convert the AP references from numbers to pointers
Change the debug_ap and memory_ap fields of the cortex_a target and
the debug_ap field of the cortex_m target to be pointers to the
struct adiv5_ap instead of AP numbers in some known DAP.

This reduces the dependency on the DAP struct in the targets and
enables MEM-AP accesses to take the relevant AP as parameter.

Change-Id: I39d7b134d78000564b7eec5bff464adf0ef89147
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3147
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:28:33 +00:00
Andreas Fritiofson
cd12c423dc cortex_a: Call ahbap_debugport_init on the discovered AP and not 0
Change-Id: I76bb9bd800697776a375ab803402780c3c7bea35
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3145
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:27:42 +00:00
Andreas Fritiofson
dc574aa1da target/arm: Remove usage of struct arm_jtag in ARMv7 targets
The Cortex-A and Cortex-M keeps an arm_jtag struct around just to be
able to pass a pointer to it to one common JTAG function which anyway
only uses the TAP field.

Refactor the function to take a TAP directly, remove the legacy struct
from cortex instances and store the TAP pointer only in the DAP.

Cortex-M makes a call to arm_jtag_setup_connection() with the struct
but the function does nothing useful for a Cortex-M target so remove
the call.

Change-Id: I3b33709ef55372ef14522ed4337e9f2e817ae3ab
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3142
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
2015-12-29 20:27:01 +00:00
Patrick Stewart
bf4cf76631 arm_debug: Support multiple APs per DAP and remove DAP from armv7* structs
Separate out the values from adiv5_dap that are associated with a specific AP into a new struct, so we can properly support multiple APs. Remove the DAP struct from the armv7* structs, because we can have multiple CPUs per DAP, and we shouldn't have multiple DAP structs. Tidy up a few places where ap_current is used incorrectly.

Change-Id: I0c6ef4b49cc86b140366347aaf9b76c07cbab0a8
Signed-off-by: Patrick Stewart <patstew@gmail.com>
Reviewed-on: http://openocd.zylin.com/2984
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2015-12-29 12:35:50 +00:00
Patrick Stewart
67f24e6734 cortex_m: Select an AP when accessing the DAP
Prepare to support multiple cortex-m cores on one DAP. Uses mem_ap_sel_*
functions and removes mem_ap_* functions. Adds a new debug_ap
parameter to the cortex_m (currently set to zero as in existing code).

Change-Id: I6926029d1e7bf44a42d453d1aff349bda824ba72
Signed-off-by: Patrick Stewart <patstew@gmail.com>
Reviewed-on: http://openocd.zylin.com/2983
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2015-12-29 12:35:04 +00:00
Alamy Liu
f1dac60894 cortex-a: Fix "Detected core" number is always '0'
Problem
No matter what target->coreid is, it always shows
  Detected core 0 dbgbase: ...

In dap_lookup_cs_component(), it decreases the core index value to zero
in order to find the desired core.
The reference to coreidx is necessary considering "a device which has nested
ROM tables, with each core described in its own table." (by Paul Fertser).

Change-Id: I9b56d45d6edf6639e748a625ab27787f8e5a5776
Signed-off-by: Alamy Liu <alamy.liu@gmail.com>
Reviewed-on: http://openocd.zylin.com/2902
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2015-12-29 12:33:56 +00:00
Matthias Welwarsky
332023fb23 cortex_a: fix fast-mode memory reads
cortex_a_read_apb_ab_memory_fast() uses the wrong order of ITR and DSCR
writes when setting up the transfer. ARM DDI0406C says in C8.2 regarding
"Fast mode" operation to first switch to fast mode and then latch the
instruction in ITR. Current implementation first wrote ITR, causing
the instruction to be executed immediately, then switched to fast mode
without an instruction latched. Repeated reading of DTRTX didn't
execute LDC and thus replicated its current content into the whole buffer.

This patch uses the following, revised algorithm:
1) switch to non-blocking mode and issue the LDC for the first word
2) if more than one word is to be read:
 - switch to fast mode
 - latch the LDC instruction into ITR (it is _not_ executed)
 - issue (count-1) reads of DTRTX register, each read returns the current
   content of DTRTX and re-issues the latched instruction
 -> now the second-to-last word is in the buffer and the LDC for the last
    word has been issued.
3) wait for the last instruction to complete
4) switch back to non-blocking mode
5) Read DTRTX for the last (or: only) word and put it into the buffer

Change-Id: I44f5c585962ffa5af257c3d5a2a802c122b6b1e4
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3122
Tested-by: jenkins
Reviewed-by: Christopher Head <chead@zaber.com>
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2015-12-01 06:52:01 +00:00
Matthias Welwarsky
8b140fd724 cortex_a: replace cortex_a_check_address function
When accessing memory through the ARM core, privilege levels and mmu
access permissions observed. Thus it depends on the current mode of the
ARM core whether an access is possible or not. the ARM in USR mode can
not access memory mapped to a higher privilege level. This means, if the
ARM core is halted while executing at PL0, the debugger would be
prevented from setting a breakpoint at an address with a higher privilege
level, e.g. in the OS kernel. This is not desirable.

cortex_a_check_address() tried to work around this by predicting if an
access would fail and switched the ARM core to SVC mode. However, the
prediction was based on hardcoded address ranges and only worked for
Linux and a 3G/1G user/kernel space split.

This patch changes the policy to always switch to SVC mode for memory
accesses. It introduces two functions cortex_a_prep_memaccess() and
cortex_a_post_memaccess() which bracket memory reads and writes. These
function encapsulate all actions necessary for preparation and cleanup.

Change-Id: I4ccdb5fd17eadeb2b66ae28caaf0ccd2d014eaa9
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3119
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 10:07:54 +00:00
Matthias Welwarsky
3683f8cef0 cortex_a: rework mmu manipulation
when disabling the mmu to access physical addresses, normally the d-cache
must be disabled as well. Disabling the d-cache also requires a full
clean&invalidate. However, since all memory writes are treated as write-
through no-allocate and memory reads do not allocate cache lines,
effectively the d-cache state does not change at all. We can therefore
save the the d-cache disabling and flushing.

This patch also simplifies the function a bit.

Change-Id: Ia17c56a28f432156429cd4596107e3652b788e63
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3114
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2015-11-30 10:07:33 +00:00
Matthias Welwarsky
442e2506b1 cortex_a: force cache and tlb bypass when cpu is in debug state
for minimal impact on the hardware state, force all memory accesses to
bypass the caches and tlbs. This may actually be the default, but ARM
recommends in DDI0406C to set proper default values on debug init.

Change-Id: If5ac097b6ee725c047b1e86c2f90eabe16b98c7b
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3079
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 10:07:10 +00:00
Matthias Welwarsky
f24aa404ba cortex_a: Update instruction cache after setting a soft breakpoint
Call armv7a_l1_d_cache_flush_virt() before writing the breakpoint,
to make sure the d-cache is clean and invalid at the breakpoint
location down to PoC.

Call armv7a_l1_d_cache_inval_virt() after writing the breakpoint
again, so that d-cache will pick up the modified code.
Call armv7a_l1_i_cache_inval_virt() after writing the breakpoint
to memory to make the change visible to the CPU.

Change-Id: I24fc27058d99cb00d7f6002ccb623cab66b0d234
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3033
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 05:43:03 +00:00
Matthias Welwarsky
d17c11759f armv7a: rework automatic flush-on-write handling
The following changes are implemented:
- Clean&Invalidate the VA range to PoC *before* the write takes place
- Remove SMP handling since DCCIMVA instruction already maintains SMP
  coherence.
- Remove separate Invalidate step

Change-Id: I19fd3cc226d8ecf2937276fc63258b6a26e369a7
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3027
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 05:41:58 +00:00
Matthias Welwarsky
8704e53665 armv7a: fix handling of inner caches
ARMv7 architecture allows up to 7 cache levels that are architecturally
visible, as opposed to "system caches", which are outside of the domain
defined by ARMv7 and require separate management. This patch enables
detection and identification of caches at all levels. It also implements
a new "flush-all" function that cleans & invalidates all cache levels to
the "Point of Coherence".

Change-Id: Ib77115d6044d39845907941c6f031e208f6e0aa5
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/3024
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 05:40:57 +00:00
Oleksij Rempel
cd440bd32a add armv7a_cache handlers
This patch introduces, new command set and handlers for l1 and l2x caches.

Patch set 10 folded the following changes into this one:

Ib1a2a1fc1b929dc49532ac13a78e8eb796ab4415
If8d87a03281d0f4ad402909998e7834eb4837e79
I0749f129fa74e04f4e9c20d143a744f09ef750d8

Change-Id: I849f4d1f20610087885eeddefa81d976f77cf199
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-on: http://openocd.zylin.com/2800
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2015-11-30 05:39:40 +00:00
Oleksij Rempel
74592a8435 cortex_a: add cortex_a_[read|write]_memory_ahb
Change-Id: I39c457274e1714a8d42233f7fc490fb58f5cb38e
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-on: http://openocd.zylin.com/2798
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 05:39:15 +00:00
Oleksij Rempel
2f3127e1ab cortex_a: add cortex_a_[read|write]_buffer
Change-Id: I82011822d913aa7228f5c6262b540156494bedfe
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-on: http://openocd.zylin.com/2797
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 05:38:54 +00:00
Oleksij Rempel
b55361d07f cortex_a: remove cache handlers from cortex_a_write_phys_memory
This was needed for ahb access

Change-Id: I638f45a276a593c08140b5d9d7480617aa85f096
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-on: http://openocd.zylin.com/2796
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
Tested-by: jenkins
2015-11-30 05:38:24 +00:00
Oleksij Rempel
f478107d02 cortex_a: remove ahb support for phys_memory access
Change-Id: I5b7c21c16e95cc1a3160e356d6e64f1f8c449e6e
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Reviewed-on: http://openocd.zylin.com/2795
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
2015-11-30 05:37:56 +00:00
Paul Fertser
60d5701590 target: cortex_a: add deinit_target handler to free memory
Tested with Valgrind accesing a Pandaboard.

Change-Id: I51bba044974ecfc4d418998816d44a8563264123
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/3101
Tested-by: jenkins
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
2015-11-13 06:55:26 +00:00
Paul Fertser
408213f554 target: cortex_a: do not create new register cache every reset
Commit 68101e67ac introduced a
regression which resulted for ever-growing registers list (as output
by "reg" command), its contents were doubled every reset (actually,
every examination).

Change-Id: Ie3409c795160a2fc840a5e8a892928df0bcc0c57
Reported-by: Daniele Emancipato <daniele12457@hotmail.com>
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/3100
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
2015-11-07 20:36:56 +00:00
Evan Hunter
987201c6dc Cortex A/R : Allow interrupt disable during single-step
Example usage:
	cortex_a maskisr on
	cortex_a maskisr off
	cortex_r maskisr on
	cortex_r maskisr off

Change-Id: I799288d9b848a06f561ba29ec1eb8e5eeace5685
Signed-off-by: Evan Hunter <ehunter@broadcom.com>
Reviewed-on: http://openocd.zylin.com/2876
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>
Reviewed-by: Freddie Chopin <freddie.chopin@gmail.com>
2015-11-07 20:36:13 +00:00
Paul Fertser
68101e67ac target/cortex_a: examination should be done every time it's asked for
It was observed on AM437x that after every reset the target's debug
regions are unpowered. To be able to properly communicate with the
target and perform cortex_a init debug access after a reset event the
examination need to be performed every time, not just on OpenOCD
start.

Change-Id: Idf272e127ee88341e806ee00df154eade573451d
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2723
Tested-by: jenkins
Reviewed-by: Felipe Balbi <balbi@ti.com>
2015-04-24 14:47:16 +01:00