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7258 Commits

Author SHA1 Message Date
Tim Newsome 78fe0b56db Deal with dbus being busy in all cases. 
Change-Id: Ifede6e05c3c4538f22a52cd0e9833cf3a9983d04
 2016-09-29 08:28:31 -07:00
Tim Newsome b04d5e8821 Read idle, and test all debug RAM. 
Read dtmcontrol's idle field to decide how many run-test/idle cycles are
required to communicate with the target.

In riscv_examine(), write and read all of Debug RAM to check the target
is at least somewhat sane.

Change-Id: Ieedb7a50418fa1f5e0d456cde53c52f7fc51662b
 2016-09-27 13:06:32 -07:00
Tim Newsome c67850b63d Only write to existing dram. Clear dbus error. 
Old code would write 64 bytes of DRAM if the dbus was busy in
cache_write().

New code clears the dbus error condition when the bus is busy. (This
part is untested.)

Change-Id: Ia396fe819fa1828bb75726d85513b113cc9e13f0
 2016-09-27 08:45:51 -07:00
Tim Newsome 54c65a9a4b Improve low-level logging. 
Now logging is consistent and more readable.
I did remove most logging during riscv_poll() since it clutters up the
log/screen and is not generally helpful.
 2016-09-23 14:16:24 -07:00
Tim Newsome 08228e6f53 Make more code use the scans "class". 
Helps with consistency, and this is a rare commit that net deletes
lines.
 2016-09-23 14:16:24 -07:00
Tim Newsome cf1dc0b6cb Implement hardware triggers that match spec. 
It's basically working, but the following corner cases are failing:
    TriggerDmode
    TriggerLoadAddressInstant
    TriggerStoreAddressInstant
 2016-09-23 14:16:24 -07:00
Tim Newsome 526bbc5284 Optimize read a bit. 
Remove some unnecessary scans.
 2016-09-23 14:16:24 -07:00
Tim Newsome c68b13ed67 Properly mark the cache as clean after its written 
This reduces the number of scans, but I doubt it noticeably improves
performance.
 2016-09-23 14:16:24 -07:00
Tim Newsome 243233c8b8 Convert some more code for 64-bit. 2016-09-23 14:16:24 -07:00
Tim Newsome b04f89076a Properly write 64-bit PCs. 2016-09-23 14:16:24 -07:00
Tim Newsome e3e745abb9 WIP for 64-bit support. 
GPR register writes/reads seem to work.
 2016-09-23 14:16:24 -07:00
Megan Wachs 7927e90a42 Prevent the State Machine from moving during runtest 2016-09-23 14:16:24 -07:00
Tim Newsome 2f1b6b5803 Stop using conditional writes. 
It doesn't help, and makes the spec more complex. Now that I've proven
OpenOCD doesn't need it, I'll remove it from the spec.
 2016-09-23 14:16:24 -07:00
Tim Newsome 5dbad6b0c9 Check for business in block reads. 2016-09-23 14:16:24 -07:00
Tim Newsome f8b0f4bf29 Check for exceptions in reads and writes. 2016-09-23 14:16:23 -07:00
Tim Newsome f5ae4d864c Add support for virtual priv register. 
Users can use this register to inspect and change the privilege level of
the core. It doesn't make any assumptions about the actual underlying
debug mechanism (as opposed to having the user change DCSR directly,
which may not exist in all debug implementations).
 2016-09-23 14:16:23 -07:00
Tim Newsome 5de81da8f4 Remove commented out code. 
Also added back the initial check that confirms debug RAM is written
correctly.
 2016-09-23 14:16:23 -07:00
Tim Newsome a916d204b9 Optimize memory read. 
Saves 8s on the full test suite.
 2016-09-23 14:16:23 -07:00
Tim Newsome 32e7a962c3 Write fence.i before dret. 
Makes things work if the ROM doesn't contain fence.i (which is slow, so
Andrew took it out).
 2016-09-23 14:16:23 -07:00
Tim Newsome 4ced71b1f1 Log more. 2016-09-23 14:16:23 -07:00
Tim Newsome 20e2bfe3db Quickly read all GPRs on halt. 
gdb will ask for them anyway, and one by one is slow.
StepTest went from 9.7s to 5.3s.
 2016-09-23 14:16:23 -07:00
Tim Newsome 6fac5a41f8 Remove some hwbp debug code. 2016-09-23 14:16:23 -07:00
Tim Newsome 7dcc0681d4 Speed up some other operations. 2016-09-23 14:16:23 -07:00
Tim Newsome 1fdcfa7082 Speed up register read. 
Don't scan an extra sequence just to read the return value.
 2016-09-23 14:16:23 -07:00
Tim Newsome 27b94d36d0 Fix 32-bit build. 2016-09-23 14:16:23 -07:00
Tim Newsome 668070cc45 Faster download. 
16K testcase:
Transfer rate: 53 KB/sec, 2222 bytes/write.
 2016-09-23 14:16:23 -07:00
Tim Newsome 9aab0aa068 Minor cleanup. 2016-09-23 14:16:23 -07:00
Tim Newsome 06f6b5020c Use optimized cache/program write scheme for most 
operations.
 2016-09-23 14:16:23 -07:00
Tim Newsome a1875fbecf Working on optimized program running. 
Makes a big difference on the XLEN code (29ms to 8ms). Now to use it in
more places.
 2016-09-23 14:16:23 -07:00
Tim Newsome 9b9653ab7d Use hardware single step. 2016-09-23 14:16:23 -07:00
Tim Newsome eac8933b89 WIP on performance improvement. 
Also implement empty arch_state to prevent occasional startup crash.
 2016-09-23 14:16:23 -07:00
Tim Newsome 2d02e77bed Make this compile for 32-bit targets. 2016-09-23 14:16:23 -07:00
Tim Newsome aaa8ce10b8 Correctly figure out the number of extant hwbps. 2016-09-23 14:16:23 -07:00
Tim Newsome c471cfb63b Simple execute hardware breakpoint works. 2016-09-23 14:16:23 -07:00
Tim Newsome cb57aa55fa Deal with exceptions on register read. 
Cache dpc, so we can restore it when it's clobbered by an exception.
 2016-09-23 14:16:23 -07:00
Tim Newsome b81a846be5 Cache dcsr, since we're reading it anyway. 2016-09-23 14:16:23 -07:00
Tim Newsome c8430bb8f4 DebugTest.test_interrupt passes now. 2016-09-23 14:16:23 -07:00
Tim Newsome e10d407623 Speed up memory read a little. 2016-09-23 14:16:23 -07:00
Tim Newsome 4b19b7305f Save/restore T0 around block writes. 2016-09-23 14:16:23 -07:00
Tim Newsome 90f458e63f Reading/writing s1 now works. 2016-09-23 14:16:23 -07:00
Tim Newsome 0881092d9b Can successfully run to a swbp. 2016-09-23 14:16:23 -07:00
Tim Newsome c364bd0ab5 We can run to a software breakpoint, but 
gdb doesn't notice we're halted once we hit it, even though riscv_poll()
is setting the target state to halted.
 2016-09-23 14:16:23 -07:00
Tim Newsome 04cfc35147 Use the dram cache to save some scans. 2016-09-23 14:16:23 -07:00
Tim Newsome dce4a992a3 Single memory reads/writes work. 2016-09-23 14:16:23 -07:00
Tim Newsome 39788e5e6b Fix typo in comment. 2016-09-23 14:16:23 -07:00
Tim Newsome 1b349df638 WIP hackery. 
Main thing I added is code to output "verilog" for every JTAG op we do,
so we can run the same thing in simulation.
 2016-09-23 14:16:23 -07:00
Tim Newsome f40862d87c Go through run-test/idle once per dbus access. 2016-09-23 14:16:23 -07:00
Tim Newsome 9f22176618 Reading registers appears to work. 2016-09-23 14:16:23 -07:00
Tim Newsome 84944ded87 Fix up some register stuff. 
Now you can attach with gdb, and it'll attempt to read a register. That
will fail because the core won't clear debug interrupt. Adding nops
doesn't help this time.
 2016-09-23 14:16:23 -07:00
Tim Newsome f634702aaf Successfully determine xlen. 
There's a nop in there for no reason, though.
 2016-09-23 14:16:23 -07:00