soc.git
3 years agoallow small decimal opcodes convert-csv-opcode-to-binary
Jacob Lifshay [Thu, 18 Mar 2021 07:16:49 +0000 (00:16 -0700)]
allow small decimal opcodes

3 years agoupdate submodule
Jacob Lifshay [Thu, 18 Mar 2021 07:16:37 +0000 (00:16 -0700)]
update submodule

3 years agochange csv opcode field to require 0b... prefix and opint=True
Jacob Lifshay [Thu, 18 Mar 2021 03:28:32 +0000 (20:28 -0700)]
change csv opcode field to require 0b... prefix and opint=True

3 years agoupdate submodule
Jacob Lifshay [Thu, 18 Mar 2021 03:28:20 +0000 (20:28 -0700)]
update submodule

3 years agoforce opcode field to be always specified in binary for opint=True CSVs
Jacob Lifshay [Thu, 18 Mar 2021 02:45:39 +0000 (19:45 -0700)]
force opcode field to be always specified in binary for opint=True CSVs

3 years agoadd simplev.py to .gitignore
Jacob Lifshay [Thu, 18 Mar 2021 02:44:58 +0000 (19:44 -0700)]
add simplev.py to .gitignore

3 years agoupdate submodule
Jacob Lifshay [Thu, 18 Mar 2021 02:32:07 +0000 (19:32 -0700)]
update submodule

3 years agocorrect comments
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 22:33:15 +0000 (22:33 +0000)]
correct comments

3 years agore-enable SVP64 ISACaller predicate tests
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 22:29:07 +0000 (22:29 +0000)]
re-enable SVP64 ISACaller predicate tests

3 years agoadd ascii graphic for extsw svp64 operation
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 22:25:21 +0000 (22:25 +0000)]
add ascii graphic for extsw svp64 operation

3 years agoadd more explanatory comments
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 22:21:12 +0000 (22:21 +0000)]
add more explanatory comments

3 years agoadd twin-predicated extsw SVP64 ISACaller unit test
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 22:15:58 +0000 (22:15 +0000)]
add twin-predicated extsw SVP64 ISACaller unit test

3 years agoadd SVP64 dststep incrementing in PowerDecoder2, Testissuer and ISACaller
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 21:29:49 +0000 (21:29 +0000)]
add SVP64 dststep incrementing in PowerDecoder2, Testissuer and ISACaller

3 years agoadd CR-based predication to ISACaller
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 20:40:49 +0000 (20:40 +0000)]
add CR-based predication to ISACaller

3 years agocleanup raduxmmu._walk_tree
Tobias Platen [Wed, 17 Mar 2021 19:13:40 +0000 (20:13 +0100)]
cleanup raduxmmu._walk_tree

3 years agocreate iterative mmu lookup loop
Tobias Platen [Wed, 17 Mar 2021 18:59:12 +0000 (19:59 +0100)]
create iterative mmu lookup loop

3 years agoadd SVP64 INT-style predication to ISACaller
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 15:20:02 +0000 (15:20 +0000)]
add SVP64 INT-style predication to ISACaller

3 years agoadd predication SVP64 unit test
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 14:13:02 +0000 (14:13 +0000)]
add predication SVP64 unit test

3 years agoadd predication read ports (CR and INT)
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 13:21:25 +0000 (13:21 +0000)]
add predication read ports (CR and INT)

3 years agowhoops shift has to be done at same bitwidth
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 13:16:24 +0000 (13:16 +0000)]
whoops shift has to be done at same bitwidth

3 years agosplit out new_lookup function
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 13:14:07 +0000 (13:14 +0000)]
split out new_lookup function

3 years agolink up SVP64 RM Mode decoding into PowerDecoder2
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 13:00:28 +0000 (13:00 +0000)]
link up SVP64 RM Mode decoding into PowerDecoder2

3 years agoadd priv and mode to RADIXMMU
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 12:46:54 +0000 (12:46 +0000)]
add priv and mode to RADIXMMU

3 years agoadd instr_fetch mode to ISACaller Mem and RADIXMMU
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 12:34:04 +0000 (12:34 +0000)]
add instr_fetch mode to ISACaller Mem and RADIXMMU

3 years agowhitespace
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 12:22:44 +0000 (12:22 +0000)]
whitespace

3 years agoadd in SVP64 RM Mode decoder
Luke Kenneth Casson Leighton [Wed, 17 Mar 2021 12:19:06 +0000 (12:19 +0000)]
add in SVP64 RM Mode decoder

3 years agoradixmmu: detect badtree
Tobias Platen [Tue, 16 Mar 2021 18:49:20 +0000 (19:49 +0100)]
radixmmu: detect badtree

3 years agoadd valid, leaf to loop
Tobias Platen [Tue, 16 Mar 2021 17:35:35 +0000 (18:35 +0100)]
add valid, leaf to loop

3 years agoUse symbolic values for subfields and bits
Cesar Strauss [Tue, 16 Mar 2021 10:55:48 +0000 (07:55 -0300)]
Use symbolic values for subfields and bits

3 years agoAdd subfield and bit definitions for the SVP64 RM mode field
Cesar Strauss [Tue, 16 Mar 2021 10:48:05 +0000 (07:48 -0300)]
Add subfield and bit definitions for the SVP64 RM mode field

3 years agoDefine and initialise the mode variable, to be used later on
Cesar Strauss [Tue, 16 Mar 2021 00:12:11 +0000 (21:12 -0300)]
Define and initialise the mode variable, to be used later on

3 years agoRename class so it does not clash with the enum
Cesar Strauss [Tue, 16 Mar 2021 00:02:28 +0000 (21:02 -0300)]
Rename class so it does not clash with the enum

3 years agoFix import
Cesar Strauss [Mon, 15 Mar 2021 22:33:34 +0000 (19:33 -0300)]
Fix import

3 years agoadd rpte bitfields valid and leaf
Tobias Platen [Mon, 15 Mar 2021 18:49:44 +0000 (19:49 +0100)]
add rpte bitfields valid and leaf

3 years agoremove "sv." and replace with "sv" in all SVP64Asm
Luke Kenneth Casson Leighton [Sun, 14 Mar 2021 14:55:28 +0000 (14:55 +0000)]
remove "sv." and replace with "sv" in all SVP64Asm

3 years agoremove "sv." and replace with "sv" in all SVP64Asm
Luke Kenneth Casson Leighton [Sun, 14 Mar 2021 14:54:45 +0000 (14:54 +0000)]
remove "sv." and replace with "sv" in all SVP64Asm

3 years agoActivate the VL==0 loop with any SVP64 prefix whatsoever
Cesar Strauss [Sun, 14 Mar 2021 13:46:08 +0000 (10:46 -0300)]
Activate the VL==0 loop with any SVP64 prefix whatsoever

Besides agreeing with documentation, this will ease doing the VL==0
loop entirely on the Fetch FSM, since no opcode decoding is needed.

3 years agoadd setvl unit test assertions, add 2nd test
Luke Kenneth Casson Leighton [Sat, 13 Mar 2021 17:07:09 +0000 (17:07 +0000)]
add setvl unit test assertions, add 2nd test

3 years agoget first revision setvl operational in ISACaller
Luke Kenneth Casson Leighton [Sat, 13 Mar 2021 16:10:02 +0000 (16:10 +0000)]
get first revision setvl operational in ISACaller

3 years agoadd setvl-to-long converter in SVP64Asm (sigh)
Luke Kenneth Casson Leighton [Sat, 13 Mar 2021 13:35:30 +0000 (13:35 +0000)]
add setvl-to-long converter in SVP64Asm (sigh)

3 years agoadd setvl unit test
Luke Kenneth Casson Leighton [Sat, 13 Mar 2021 12:22:16 +0000 (12:22 +0000)]
add setvl unit test

3 years agoupdate submodule to include simplev setvl
Luke Kenneth Casson Leighton [Sat, 13 Mar 2021 12:20:02 +0000 (12:20 +0000)]
update submodule to include simplev setvl

3 years agoinclude SVSTATE in namespace, passing to ISACaller
Luke Kenneth Casson Leighton [Sat, 13 Mar 2021 11:33:53 +0000 (11:33 +0000)]
include SVSTATE in namespace, passing to ISACaller

3 years agoupdate submodule
Jacob Lifshay [Fri, 12 Mar 2021 22:55:24 +0000 (14:55 -0800)]
update submodule

3 years agoadd setvl to decoder
Jacob Lifshay [Fri, 12 Mar 2021 22:52:16 +0000 (14:52 -0800)]
add setvl to decoder

3 years agoautoformat code
Jacob Lifshay [Fri, 12 Mar 2021 22:50:01 +0000 (14:50 -0800)]
autoformat code

3 years agoadd OP_SETVL to MicrOp in power_enums.py
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 21:50:44 +0000 (21:50 +0000)]
add OP_SETVL to MicrOp in power_enums.py

3 years agoadd ability to set and distinguish RT=0 (RT_OR_ZERO) to OutSel enum
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 21:41:57 +0000 (21:41 +0000)]
add ability to set and distinguish RT=0 (RT_OR_ZERO) to OutSel enum

3 years agouse PowerDecoder2.loop_continue instead of no_out_vec
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 15:02:06 +0000 (15:02 +0000)]
use PowerDecoder2.loop_continue instead of no_out_vec

3 years agoremove old code
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 14:17:17 +0000 (14:17 +0000)]
remove old code

3 years agoremove old code
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 14:16:10 +0000 (14:16 +0000)]
remove old code

3 years agoremove old code
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 14:12:41 +0000 (14:12 +0000)]
remove old code

3 years agoadd more sophisticated checking of whether SVP64 loop should continue
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 12:13:58 +0000 (12:13 +0000)]
add more sophisticated checking of whether SVP64 loop should continue
PowerDecoder2

3 years ago**FOR NOW** LD/ST relies on detection of twin-predication to determine
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 12:03:39 +0000 (12:03 +0000)]
**FOR NOW** LD/ST relies on detection of twin-predication to determine
if it should continue looping.
this needs double-checking

3 years agodecoding of svp64 reg by name has to occur after immediate is extracted
Luke Kenneth Casson Leighton [Fri, 12 Mar 2021 12:00:58 +0000 (12:00 +0000)]
decoding of svp64 reg by name has to occur after immediate is extracted
otherwise tries to identify D(RA) as a GPR which of course fails

3 years agoadd forgotten PO (primary opcode) field to DecodeFields
Jacob Lifshay [Fri, 12 Mar 2021 05:50:42 +0000 (21:50 -0800)]
add forgotten PO (primary opcode) field to DecodeFields

3 years agoBring a few test cases from test_caller_64.py
Cesar Strauss [Thu, 11 Mar 2021 22:52:52 +0000 (19:52 -0300)]
Bring a few test cases from test_caller_64.py

1) Test early out when destination is not a vector
2) Do not increment source register number for scalar operand

3 years agoTest case for two successive SV instructions
Cesar Strauss [Thu, 11 Mar 2021 22:40:47 +0000 (19:40 -0300)]
Test case for two successive SV instructions

This checks that SRCSTEP is reset properly between instructions.

3 years agoadd link of RA_OR_ZERO SVP64 detection
Luke Kenneth Casson Leighton [Thu, 11 Mar 2021 20:01:47 +0000 (20:01 +0000)]
add link of RA_OR_ZERO SVP64 detection

3 years agoadd detection of whether *full* 7-bit of RA is zero/non-zero
Luke Kenneth Casson Leighton [Thu, 11 Mar 2021 19:50:19 +0000 (19:50 +0000)]
add detection of whether *full* 7-bit of RA is zero/non-zero
this because RA_OR_ZERO in PowerDecoder2 needs to test if the full
SVP64-extended register is zero

3 years agoadd in SVP64 LD/ST basic test for ISACaller
Luke Kenneth Casson Leighton [Thu, 11 Mar 2021 18:32:51 +0000 (18:32 +0000)]
add in SVP64 LD/ST basic test for ISACaller

3 years agowhoops sort out when svstate not active in ISACaller
Luke Kenneth Casson Leighton [Thu, 11 Mar 2021 18:29:26 +0000 (18:29 +0000)]
whoops sort out when svstate not active in ISACaller

3 years agowhoops PIDR is defined as 32-bits in SPRs.csv (and spec)
Luke Kenneth Casson Leighton [Thu, 11 Mar 2021 18:19:43 +0000 (18:19 +0000)]
whoops PIDR is defined as 32-bits in SPRs.csv (and spec)

3 years agoadd understanding of LDST immediates to SVP64ASM
Luke Kenneth Casson Leighton [Thu, 11 Mar 2021 18:15:06 +0000 (18:15 +0000)]
add understanding of LDST immediates to SVP64ASM

3 years agofix runtime error
Tobias Platen [Thu, 11 Mar 2021 17:56:48 +0000 (18:56 +0100)]
fix runtime error

3 years agoradix: reading first page table entry
Tobias Platen [Wed, 10 Mar 2021 18:41:11 +0000 (19:41 +0100)]
radix: reading first page table entry

3 years agoadd walk_tree arguments it needs
Luke Kenneth Casson Leighton [Wed, 10 Mar 2021 16:32:28 +0000 (16:32 +0000)]
add walk_tree arguments it needs
see https://bugs.libre-soc.org/show_bug.cgi?id=604#c13

3 years agofix address must convert to SelectableInt
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 19:40:19 +0000 (19:40 +0000)]
fix address must convert to SelectableInt

3 years agocall decode_ptre on address to obtain shift, mbits, and pgbase
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 19:38:24 +0000 (19:38 +0000)]
call decode_ptre on address to obtain shift, mbits, and pgbase

3 years agowhitespace
Tobias Platen [Tue, 9 Mar 2021 19:03:10 +0000 (20:03 +0100)]
whitespace

3 years agoRADIX: call self._walk_tree in ld and st
Tobias Platen [Tue, 9 Mar 2021 18:59:51 +0000 (19:59 +0100)]
RADIX: call self._walk_tree in ld and st

3 years agodebug radix mmu ISACaller
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 18:09:53 +0000 (18:09 +0000)]
debug radix mmu ISACaller

3 years agocomment out broken spr code
Tobias Platen [Tue, 9 Mar 2021 17:06:59 +0000 (18:06 +0100)]
comment out broken spr code

3 years ago_walk_tree: access sprs
Tobias Platen [Tue, 9 Mar 2021 16:34:17 +0000 (17:34 +0100)]
_walk_tree: access sprs

3 years agocreate first check_perms RADIX ISACaller function
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 13:09:35 +0000 (13:09 +0000)]
create first check_perms RADIX ISACaller function

3 years agomove Mem class out of ISACaller
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 12:56:49 +0000 (12:56 +0000)]
move Mem class out of ISACaller

3 years agocleanup imports
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 12:41:58 +0000 (12:41 +0000)]
cleanup imports

3 years agomove ISACaller RADIX MMU class to separate module
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 12:38:08 +0000 (12:38 +0000)]
move ISACaller RADIX MMU class to separate module

3 years agoadd pgtable and pte calculation to RADIX ISACaller
Luke Kenneth Casson Leighton [Tue, 9 Mar 2021 12:30:02 +0000 (12:30 +0000)]
add pgtable and pte calculation to RADIX ISACaller

3 years agoEnable VL==0 vector instruction skip test case
Cesar Strauss [Tue, 9 Mar 2021 11:00:04 +0000 (08:00 -0300)]
Enable VL==0 vector instruction skip test case

3 years agoAdd some extra debug traces to the GTKWave document
Cesar Strauss [Tue, 9 Mar 2021 10:57:41 +0000 (07:57 -0300)]
Add some extra debug traces to the GTKWave document

3 years agoCreate a new signal for the Simulator to wait on
Cesar Strauss [Tue, 9 Mar 2021 10:49:03 +0000 (07:49 -0300)]
Create a new signal for the Simulator to wait on

We wait on "core busy" before simulating an instruction. Trouble is, on a
VL==0 loop, there is no issue, so busy is never toggled. As a solution,
export a new insn_done signal with is pulsed either at end of Execute, or
when going back to Fetch due to skipping a vector instruction.

3 years agostart adding _get_prtable_addr
Luke Kenneth Casson Leighton [Mon, 8 Mar 2021 22:43:18 +0000 (22:43 +0000)]
start adding _get_prtable_addr

3 years agoactually make it possible to disable svp64 on commandline of test_issuer.py
Luke Kenneth Casson Leighton [Mon, 8 Mar 2021 17:21:34 +0000 (17:21 +0000)]
actually make it possible to disable svp64 on commandline of test_issuer.py

3 years agoadd option in TestRunner to disable svp64 via commandline test_runner.py nosvp64
Luke Kenneth Casson Leighton [Mon, 8 Mar 2021 17:00:36 +0000 (17:00 +0000)]
add option in TestRunner to disable svp64 via commandline test_runner.py nosvp64
currently does nothing

3 years agoadd option to cut out SVP64 from PowerDecoder2
Luke Kenneth Casson Leighton [Mon, 8 Mar 2021 12:10:00 +0000 (12:10 +0000)]
add option to cut out SVP64 from PowerDecoder2

3 years agocorrect comments in sv.add rc=1
Luke Kenneth Casson Leighton [Mon, 8 Mar 2021 12:07:50 +0000 (12:07 +0000)]
correct comments in sv.add rc=1

3 years agoRemove the unused internal insn_done signal
Cesar Strauss [Mon, 8 Mar 2021 10:22:57 +0000 (07:22 -0300)]
Remove the unused internal insn_done signal

This was used previously to enable writing to the PC register, but it's
done now within a state transition.

3 years agoFix argument order to match function declaration
Cesar Strauss [Sun, 7 Mar 2021 22:32:45 +0000 (19:32 -0300)]
Fix argument order to match function declaration

No harm was done, since the second inversion undid the first.
Just the VCD traces were switched.

3 years agoFix missing NIA update on ISACaller
Cesar Strauss [Sun, 7 Mar 2021 20:55:39 +0000 (17:55 -0300)]
Fix missing NIA update on ISACaller

The effect of this bug was mostly hidden because NIA is later updated at
the end of the SV Loop, in call(). However, in a VL==0 loop, the effect
is apparent, as PC is incremented by 4 instead of 8.

3 years agowhoops should be "make gitupdate"
Luke Kenneth Casson Leighton [Sun, 7 Mar 2021 21:35:46 +0000 (21:35 +0000)]
whoops should be "make gitupdate"

3 years agoRADIX: read SPRs
Tobias Platen [Sun, 7 Mar 2021 18:22:57 +0000 (19:22 +0100)]
RADIX: read SPRs

3 years agoRADIX: implement memassign and call
Tobias Platen [Sun, 7 Mar 2021 16:39:23 +0000 (17:39 +0100)]
RADIX: implement memassign and call

3 years agoadd SVSTATE read to DMI interface
Luke Kenneth Casson Leighton [Sun, 7 Mar 2021 15:05:24 +0000 (15:05 +0000)]
add SVSTATE read to DMI interface

3 years agoMerge WAIT_RESET into INSN_FETCH on the Issue FSM
Cesar Strauss [Sun, 7 Mar 2021 11:49:55 +0000 (08:49 -0300)]
Merge WAIT_RESET into INSN_FETCH on the Issue FSM

In a VL==0 loop, while we are skipping vector instructions, there needs to
be a way to stop the core. Unfortunately, this means duplicating the
corresponding code at instruction end, since there is no state in common
on either loop (the VL==0 instruction skip loop and the VL>1 vector loop).

This does makes it a little non-deterministic.

Normally, we would stop the core at instruction end, but could instead end
up stopping at instruction start. For this to happen, you need to stop the
core at the right moment, just after the instruction ended and before
the next instruction begins.

A way to avoid this, if necessary, would be to create a duplicate of the
INSN_FETCH state, that doesn't wait on "core stop" release.

Since we are now waiting on "core stop" release at instruction start
anyway, there is no need for the special WAIT_RESET state anymore.

3 years agomove DMI stuff to separate function in issuer.py
Luke Kenneth Casson Leighton [Sun, 7 Mar 2021 11:34:32 +0000 (11:34 +0000)]
move DMI stuff to separate function in issuer.py

3 years agoupdate comments in issuer.py
Luke Kenneth Casson Leighton [Sun, 7 Mar 2021 11:30:34 +0000 (11:30 +0000)]
update comments in issuer.py

3 years agoadd Rc=1 SVP64 unit test to svp64_cases.py
Luke Kenneth Casson Leighton [Sun, 7 Mar 2021 11:12:36 +0000 (11:12 +0000)]
add Rc=1 SVP64 unit test to svp64_cases.py

3 years agoImplement the VL==0 loop
Cesar Strauss [Sun, 7 Mar 2021 09:41:47 +0000 (06:41 -0300)]
Implement the VL==0 loop

Just after decode, decide whether we proceed to Execute, or shortcut it
directly to the next Fetch.

3 years agoAllow updating the PC and SVSTATE registers while stopped
Cesar Strauss [Sat, 6 Mar 2021 22:38:00 +0000 (19:38 -0300)]
Allow updating the PC and SVSTATE registers while stopped

While the fetch address was overridden by a PC reset, the PC register
itself was updated (with NIA) only after the first instruction ended. Use
the time while the core is stopped to recognise and update the PC and
SVSTATE registers, before the first instruction starts.