soc.git
2 years agowhitespace and use exc is None not exc == None
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 15:41:32 +0000 (15:41 +0000)]
whitespace and use exc is None not exc == None

2 years agoadd a second LD request to dcache which is merged with first,
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 15:26:03 +0000 (15:26 +0000)]
add a second LD request to dcache which is merged with first,
to implement mis-aligned LD operations

2 years agostart adding in mis-aligned LD/ST support into LoadStore1
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 14:10:16 +0000 (14:10 +0000)]
start adding in mis-aligned LD/ST support into LoadStore1
currently not activated or used so will have no effect

2 years agoadd function test_pi_ld_misalign
Tobias Platen [Sat, 8 Jan 2022 13:30:25 +0000 (14:30 +0100)]
add function test_pi_ld_misalign

2 years agobegin testcase for misalign
Tobias Platen [Fri, 7 Jan 2022 18:07:43 +0000 (19:07 +0100)]
begin testcase for misalign

2 years agowhitespace
Luke Kenneth Casson Leighton [Fri, 7 Jan 2022 16:59:59 +0000 (16:59 +0000)]
whitespace

2 years agoadd missing MSRSpec import
Luke Kenneth Casson Leighton [Fri, 7 Jan 2022 16:57:56 +0000 (16:57 +0000)]
add missing MSRSpec import

2 years agoadd msr_o to issuer in microwatt_compat mode
Luke Kenneth Casson Leighton [Fri, 7 Jan 2022 12:26:45 +0000 (12:26 +0000)]
add msr_o to issuer in microwatt_compat mode

2 years agodouble the number of lines in the L1 D/I-Cache to match microwatt
Luke Kenneth Casson Leighton [Thu, 6 Jan 2022 17:32:46 +0000 (17:32 +0000)]
double the number of lines in the L1 D/I-Cache to match microwatt
early tests halved the number of lines so as to reduce the size of SRAMs
but the issue is that this is mis-matched against the microwatt.dts
device-tree file

2 years agoadd SECOND_REQ state to loadstore.py, not yet implemented
Luke Kenneth Casson Leighton [Thu, 6 Jan 2022 17:31:57 +0000 (17:31 +0000)]
add SECOND_REQ state to loadstore.py, not yet implemented

2 years agoadd easy-to-access debug reporting of instruction and PC
Luke Kenneth Casson Leighton [Wed, 5 Jan 2022 16:32:42 +0000 (16:32 +0000)]
add easy-to-access debug reporting of instruction and PC
for microwatt verilator

2 years agouse microwatt-specific PLRU due to bug in nmutil version
Luke Kenneth Casson Leighton [Wed, 5 Jan 2022 16:31:39 +0000 (16:31 +0000)]
use microwatt-specific PLRU due to bug in nmutil version
(needs investigating)

2 years agofix DriverConflict over MSR write in Issuer/Core by providing an
Luke Kenneth Casson Leighton [Tue, 4 Jan 2022 17:19:47 +0000 (17:19 +0000)]
fix DriverConflict over MSR write in Issuer/Core by providing an
extra write-port to StateRegs

2 years agoremove FetchFSM from TestIssuer (it served its purpose for creating
Luke Kenneth Casson Leighton [Tue, 4 Jan 2022 17:03:48 +0000 (17:03 +0000)]
remove FetchFSM from TestIssuer (it served its purpose for creating
the Inorder version)

2 years agodoh, bus-hack was the wrong way round. *output* the address with
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 23:37:28 +0000 (23:37 +0000)]
doh, bus-hack was the wrong way round. *output* the address with
3 extra LSBs at the front to fix the wishbone incompatibility

2 years agosigh, microwatts wishbone bus usage is non-wishbone-compliant:
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 23:28:13 +0000 (23:28 +0000)]
sigh, microwatts wishbone bus usage is non-wishbone-compliant:
the full address (including LSBs) is dropped onto the bus

2 years agosigh have to allow external clocks and reset mess even in microwatt-compat
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 22:33:39 +0000 (22:33 +0000)]
sigh have to allow external clocks and reset mess even in microwatt-compat
mode.  soc.vhdl still needs to be able to pull an external reset OR
DMI needs to be able to instruct the core to do it. hardly surprising

2 years agogive module appropriate top-level name in microwatt compat mode
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 22:10:17 +0000 (22:10 +0000)]
give module appropriate top-level name in microwatt compat mode

2 years agoadd missing ext_irq signal to testissuer in microwatt compat mode
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 22:09:56 +0000 (22:09 +0000)]
add missing ext_irq signal to testissuer in microwatt compat mode

2 years agoadding an extra option to issuer_verilog.py to be able to cteate a
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 19:55:53 +0000 (19:55 +0000)]
adding an extra option to issuer_verilog.py to be able to cteate a
microwatt-core-compatible verilog file.  it needs to be compatible
with this interface, such that microwatt.v can have TestIssuerInternal
dropped directly in place

module core_512_88be32b2ccc17aa9df4dd9526954b105d7825eba(clk,
rst, alt_reset, \wishbone_insn_in.dat , \wishbone_insn_in.ack ,
\wishbone_insn_in.stall , \wishbone_data_in.dat , \wishbone_data_in.ack ,
\wishbone_data_in.stall , dmi_addr, dmi_din, dmi_req, dmi_wr, ext_irq,
\wishbone_insn_out.adr , \wishbone_insn_out.dat , \wishbone_insn_out.sel ,
\wishbone_insn_out.cyc , \wishbone_insn_out.stb , \wishbone_insn_out.we ,
\wishbone_data_out.adr , \wishbone_data_out.dat , \wishbone_data_out.sel ,
\wishbone_data_out.cyc , \wishbone_data_out.stb , \wishbone_data_out.we ,
dmi_dout, dmi_ack, terminated_out);

2 years agobring external irq out for microwatt-compatible mode in testissuer
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 19:00:46 +0000 (19:00 +0000)]
bring external irq out for microwatt-compatible mode in testissuer

2 years agostop display of LDSTCompUnit debug info on every cycle
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 14:08:19 +0000 (14:08 +0000)]
stop display of LDSTCompUnit debug info on every cycle

2 years agoOn inorder.py, after Execute, update the PC and go back to Fetch
Cesar Strauss [Mon, 3 Jan 2022 13:02:34 +0000 (10:02 -0300)]
On inorder.py, after Execute, update the PC and go back to Fetch

When removing SVP64 from inorder.py, this code block must have
been deleted by mistake.

"python test_issuer.py nosvp64 --inorder" now completes successfully,
without going into an infinite loop.

2 years agorename nia to cia in MMU input record and mmu FSM
Luke Kenneth Casson Leighton [Thu, 30 Dec 2021 14:24:20 +0000 (14:24 +0000)]
rename nia to cia in MMU input record and mmu FSM
this gets the PC passed over when an instruction fault occurs in
MSR.IR=True mode.

previous tests were only working because the instructions started at 0x0000
and a full cache line was read by I-Cache.  tests greater than a cache
line would have failed

2 years agoAdd an --inorder option to test_issuer.py
Cesar Strauss [Tue, 28 Dec 2021 21:06:02 +0000 (18:06 -0300)]
Add an --inorder option to test_issuer.py

To use, add "--inorder" as the last option, before the test list
It's using the newly added pspec flag (see openpower-isa repo)

2 years agoadd misaligned mmu.bin test 5 notes: currently LoadStore1 does not
Luke Kenneth Casson Leighton [Tue, 28 Dec 2021 02:30:11 +0000 (02:30 +0000)]
add misaligned mmu.bin test 5 notes: currently LoadStore1 does not
support misaligned LD/ST therefore a 0x600 exception is raised
where actually a page-table lookup over the boundary (into a second
PTE which does not exist) should result in a 0x300 (DAR) fault.

also took the opportunity to set align_intr when no-cache is requested
on dcbz

2 years agofound bug in mmu with calculating addrsh, should have been a right
Luke Kenneth Casson Leighton [Mon, 27 Dec 2021 18:52:05 +0000 (18:52 +0000)]
found bug in mmu with calculating addrsh, should have been a right
shift

2 years agoadd mmu.py microwatt mmu.bin test4 page table
Luke Kenneth Casson Leighton [Mon, 27 Dec 2021 18:51:28 +0000 (18:51 +0000)]
add mmu.py microwatt mmu.bin test4 page table
and add some debug / clarity for signal names in mmu.py
looking for addrsh bug

2 years agoFix indentation
Cesar Strauss [Mon, 27 Dec 2021 13:26:45 +0000 (10:26 -0300)]
Fix indentation

2 years agogood grief, finally tracked down a piece of missing code in the MMU
Luke Kenneth Casson Leighton [Sun, 26 Dec 2021 18:52:29 +0000 (18:52 +0000)]
good grief, finally tracked down a piece of missing code in the MMU
address-shift had somehow not been included
@@ -509,6 +523,10 @@ class MMU(Elaboratable):
         comb += tlb_mask.shift.eq(r.shift)
         comb += finalmask.eq(tlb_mask.mask)

+        # Shift address bits 61--12 right by 0--47 bits and
+        # supply the least significant 16 bits of the result.
+        comb += addrsh.eq(r.addr[12:62] << r.shift)
+

microwatt mmu.bin test 2 should now succeed

2 years agowhoops, using variable RegStage0 in dcache stage_0, should not use sync
Luke Kenneth Casson Leighton [Sun, 26 Dec 2021 00:43:31 +0000 (00:43 +0000)]
whoops, using variable RegStage0 in dcache stage_0, should not use sync

2 years agomissed reset of d_valid in dcache.py and missed that its
Luke Kenneth Casson Leighton [Sun, 26 Dec 2021 00:16:53 +0000 (00:16 +0000)]
missed reset of d_valid in dcache.py and missed that its
input is sync not comb

2 years agorename addr to raddr in LoadStore1 to avoid conflict with
Luke Kenneth Casson Leighton [Sun, 26 Dec 2021 00:15:35 +0000 (00:15 +0000)]
rename addr to raddr in LoadStore1 to avoid conflict with
PortInterfaceBase

2 years agoadd mmu.bin test2 to much simpler test_loadstore1.py
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 15:49:25 +0000 (15:49 +0000)]
add mmu.bin test2 to much simpler test_loadstore1.py
this eliminates TestIssuer (and the MMU FSM-based FU) from enquiries
into a VM lookup bug where virtual address is being treated as the real

2 years agomove msr in test_loadstore1.py outside of conditional block
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 15:42:04 +0000 (15:42 +0000)]
move msr in test_loadstore1.py outside of conditional block

2 years agowhitespace
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 15:32:59 +0000 (15:32 +0000)]
whitespace

2 years agomove microwatt mmu.bin test 3 page table to test pagetables module
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 15:27:20 +0000 (15:27 +0000)]
move microwatt mmu.bin test 3 page table to test pagetables module

2 years agowait for MMU "done" when setting PRTBL and PIDR
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 07:24:11 +0000 (07:24 +0000)]
wait for MMU "done" when setting PRTBL and PIDR

2 years agoadd microwatt mmu.bin regression test test_mmu_3
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 06:57:15 +0000 (06:57 +0000)]
add microwatt mmu.bin regression test test_mmu_3

2 years agoenable instruction redirect in mmu ifetch test
Luke Kenneth Casson Leighton [Fri, 24 Dec 2021 13:49:19 +0000 (13:49 +0000)]
enable instruction redirect in mmu ifetch test

2 years agosomehow managed to miss out setting r1.forward_valid1 in dcache
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 20:04:54 +0000 (20:04 +0000)]
somehow managed to miss out setting r1.forward_valid1 in dcache

2 years agouniquify names in dcache.py
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 19:47:39 +0000 (19:47 +0000)]
uniquify names in dcache.py

2 years agoallow MSR reset to default to a value set by issuer_verilog.py
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 17:05:53 +0000 (17:05 +0000)]
allow MSR reset to default to a value set by issuer_verilog.py

2 years agopass in msr_reset to issuer_verilog.py
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 16:57:59 +0000 (16:57 +0000)]
pass in msr_reset to issuer_verilog.py

2 years agoadd ability to set the reset values of RegFileArray
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 16:56:21 +0000 (16:56 +0000)]
add ability to set the reset values of RegFileArray

2 years agoRemove extra wait on core_stop_o at end of Execute.
Cesar Strauss [Thu, 23 Dec 2021 11:45:25 +0000 (08:45 -0300)]
Remove extra wait on core_stop_o at end of Execute.

Fixes https://bugs.libre-soc.org/show_bug.cgi?id=726
Now, there is only one wait, before Fetch.
It fixes DMI single-stepping for Power ISA 3.0B instructions, but
single-stepping in the middle of a SVP64 VL loop no longer works,
for now.

2 years agoRe-enable core stopped signal when stopped.
Cesar Strauss [Thu, 23 Dec 2021 10:56:42 +0000 (07:56 -0300)]
Re-enable core stopped signal when stopped.

2 years agoonly use a single variable for ack adjusting in dcache.py
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 23:21:50 +0000 (23:21 +0000)]
only use a single variable for ack adjusting in dcache.py
STORE_WAIT_ACK state

2 years agofix issues with running core in DMI "stopped" status when
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 23:20:14 +0000 (23:20 +0000)]
fix issues with running core in DMI "stopped" status when
issuing a single-step

2 years agowhen setting DSISR in LoadStore1 use correct load bit (from register)
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 03:53:45 +0000 (03:53 +0000)]
when setting DSISR in LoadStore1 use correct load bit (from register)

2 years agouse correct X-Form L field in OP_MTMSRD
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 03:53:13 +0000 (03:53 +0000)]
use correct X-Form L field in OP_MTMSRD

2 years agocheck problem state in OP_MTMSRD from original reg RA rather than
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 03:24:44 +0000 (03:24 +0000)]
check problem state in OP_MTMSRD from original reg RA rather than
after the fact

2 years agowhoops, use MSR.IR for I-Cache fetch!
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 02:44:57 +0000 (02:44 +0000)]
whoops, use MSR.IR for I-Cache fetch!
virtual memory instruction fetch uses MSR.IR not MSR.DR

2 years agoremove unneeded state in LoadStore1
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 01:47:38 +0000 (01:47 +0000)]
remove unneeded state in LoadStore1

2 years agoclear instruction fault on exception WAIT_MMU ACK in LoadStore1
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:49:07 +0000 (00:49 +0000)]
clear instruction fault on exception WAIT_MMU ACK in LoadStore1

2 years agoclear out instr_fault when exception is thrown
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:42:16 +0000 (00:42 +0000)]
clear out instr_fault when exception is thrown

2 years agoclear instruction fault on idle/valid in Loadstore1
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:39:30 +0000 (00:39 +0000)]
clear instruction fault on idle/valid in Loadstore1

2 years agoooo far too late at night to be doing this
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:19:54 +0000 (00:19 +0000)]
ooo far too late at night to be doing this

2 years agowhoops use C not Const
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:18:39 +0000 (00:18 +0000)]
whoops use C not Const

2 years agowhoops use C not Const
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:15:26 +0000 (00:15 +0000)]
whoops use C not Const

2 years agoremove bus_ack (found bug in Simulation, sorted)
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:15:07 +0000 (00:15 +0000)]
remove bus_ack (found bug in Simulation, sorted)

2 years agobug in mmu setting radix tree size with one extra bit
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:03:33 +0000 (00:03 +0000)]
bug in mmu setting radix tree size with one extra bit
rts does not include bit 63 (MSB0 bit 0)

2 years agocontinue to assert PC in FetchFSM if needed
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 23:50:47 +0000 (23:50 +0000)]
continue to assert PC in FetchFSM if needed

2 years agoenable I-Cache wishbone memory type in issuer_verilog.py if MMU requested
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 16:32:55 +0000 (16:32 +0000)]
enable I-Cache wishbone memory type in issuer_verilog.py if MMU requested

2 years agowhoops issuer_verilog.py enabling mmu has to pass microwatt_mmu
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 15:57:37 +0000 (15:57 +0000)]
whoops issuer_verilog.py enabling mmu has to pass microwatt_mmu
option to TestMemPSpec

2 years agofor each unit test case in test_issuer_mmu_data_path.py initialise memory
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 15:47:39 +0000 (15:47 +0000)]
for each unit test case in test_issuer_mmu_data_path.py initialise memory
to empty

2 years agotest_issuer_mmu_data_path.py needs to use wb_get because of
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 14:21:06 +0000 (14:21 +0000)]
test_issuer_mmu_data_path.py needs to use wb_get because of
reading from i-cache cannot be done without it

2 years agommu code-comments
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 12:51:45 +0000 (12:51 +0000)]
mmu code-comments

2 years agocomments
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 05:07:37 +0000 (05:07 +0000)]
comments

2 years agouse prtbl in proc_tbl_wait in mmu
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 04:59:48 +0000 (04:59 +0000)]
use prtbl in proc_tbl_wait in mmu

2 years agommu.py comments
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 04:53:45 +0000 (04:53 +0000)]
mmu.py comments

2 years agoset up DAR correctly in unit tests, added set_ldst_spr() which toggles
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 23:10:09 +0000 (23:10 +0000)]
set up DAR correctly in unit tests, added set_ldst_spr() which toggles
LoadStore1 input flags in order to store DAR in the unit itself

2 years agounit tests for SPRs when MMU enabled,
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 19:07:44 +0000 (19:07 +0000)]
unit tests for SPRs when MMU enabled,
start setting DAR, DSISR, PIDR, PRTBL etc

2 years agomore code-comments
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 15:11:46 +0000 (15:11 +0000)]
more code-comments

2 years agocode-comments in MMU
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 15:08:20 +0000 (15:08 +0000)]
code-comments in MMU

2 years agoprefer not to invert when doing if/else.
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 15:01:38 +0000 (15:01 +0000)]
prefer not to invert when doing if/else.

2 years agomore code-comments
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 13:42:09 +0000 (13:42 +0000)]
more code-comments

2 years agoadd RTPDE - Radit Tree Page Directory Entry - Record and use it in MMU
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 13:38:44 +0000 (13:38 +0000)]
add RTPDE - Radit Tree Page Directory Entry - Record and use it in MMU
RTPDE is different from RTPTE

2 years agoadd (and ues) PRTBL Record in MMU
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 13:14:12 +0000 (13:14 +0000)]
add (and ues) PRTBL Record in MMU
PRTBL: Page Table Record.  it is identical in format and naming PGTBL

2 years agocreate PGTBL Record and use it in MMU page_table_idle
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 12:53:11 +0000 (12:53 +0000)]
create PGTBL Record and use it in MMU page_table_idle

2 years agoadd hard stop address in ifetch unit test, bit of a mess:
Luke Kenneth Casson Leighton [Sun, 19 Dec 2021 21:26:25 +0000 (21:26 +0000)]
add hard stop address in ifetch unit test, bit of a mess:
TestIssuerFSM is just being caught on the edge of attempting to execute
another instruction at a TRAP point

2 years agoset terminate if core terminate requested
Luke Kenneth Casson Leighton [Sun, 19 Dec 2021 15:54:15 +0000 (15:54 +0000)]
set terminate if core terminate requested
rather than override what is in TestIssuerBase, which examines PC for
a DBG DMI Halt condition (stop_addr_o)

2 years agocode-comments
Luke Kenneth Casson Leighton [Sun, 19 Dec 2021 15:49:07 +0000 (15:49 +0000)]
code-comments

2 years agoadd DMI STOPADDR register and use it in HDLRunner to halt simulations
Luke Kenneth Casson Leighton [Sun, 19 Dec 2021 15:47:13 +0000 (15:47 +0000)]
add DMI STOPADDR register and use it in HDLRunner to halt simulations
at exactly the right point.  very useful also for gdb hardware-level
breakpoints

2 years agobreak out when core is stopped in HDLRunner
Luke Kenneth Casson Leighton [Sun, 19 Dec 2021 15:03:55 +0000 (15:03 +0000)]
break out when core is stopped in HDLRunner
should be using DMI status check but this is quick

2 years agoadd link to XICS bugreport
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 23:49:06 +0000 (23:49 +0000)]
add link to XICS bugreport

2 years agosort out reset signalling after tracking down Simulation() bug
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 15:37:38 +0000 (15:37 +0000)]
sort out reset signalling after tracking down Simulation() bug

2 years agoadd icache/dcache/mmu unit test for TestIssuer
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 12:05:15 +0000 (12:05 +0000)]
add icache/dcache/mmu unit test for TestIssuer
this is a work-in-progress

2 years agoget instructions to re-run in issuer after I-Cache TLB lookup
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 02:19:06 +0000 (02:19 +0000)]
get instructions to re-run in issuer after I-Cache TLB lookup

2 years agoforgot to connect up I-Cache to MMU
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 01:57:20 +0000 (01:57 +0000)]
forgot to connect up I-Cache to MMU

2 years agomove connection of bus.stall in icache.py,
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 01:57:04 +0000 (01:57 +0000)]
move connection of bus.stall in icache.py,
only create a fake bus.stall if ibus does not have a stall signal

2 years agotidyup
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 01:22:06 +0000 (01:22 +0000)]
tidyup

2 years agotlb_req_index is TLB_BITS long not TLB_SIZE
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 01:19:40 +0000 (01:19 +0000)]
tlb_req_index is TLB_BITS long not TLB_SIZE

2 years agowhoops, a Simulation bug, dcache bus ack Signal needed to be
Luke Kenneth Casson Leighton [Thu, 16 Dec 2021 17:07:58 +0000 (17:07 +0000)]
whoops, a Simulation bug, dcache bus ack Signal needed to be
copied into a separate combinatorial Signal

2 years agogive names to MMU records
Luke Kenneth Casson Leighton [Thu, 16 Dec 2021 14:55:38 +0000 (14:55 +0000)]
give names to MMU records

2 years agoset_mmu_spr was using the slow-SPR index for the regfile
Luke Kenneth Casson Leighton [Thu, 16 Dec 2021 14:37:06 +0000 (14:37 +0000)]
set_mmu_spr was using the slow-SPR index for the regfile
not the actual 10-bit SPR number.  hence trying to set PRTBL
fails

2 years agowhoops remove duplicate code (cut/paste error) no harm done
Luke Kenneth Casson Leighton [Thu, 16 Dec 2021 14:07:09 +0000 (14:07 +0000)]
whoops remove duplicate code (cut/paste error) no harm done

2 years agoremove more unneeded code
Luke Kenneth Casson Leighton [Wed, 15 Dec 2021 20:15:56 +0000 (20:15 +0000)]
remove more unneeded code

2 years agoread MSR.PR and MSR.DR and update ICache priv/virt moed during fetch
Luke Kenneth Casson Leighton [Wed, 15 Dec 2021 15:49:45 +0000 (15:49 +0000)]
read MSR.PR and MSR.DR and update ICache priv/virt moed during fetch

2 years agoremove more of SVP64 from TestIssuerInternalInOrder
Luke Kenneth Casson Leighton [Wed, 15 Dec 2021 15:20:33 +0000 (15:20 +0000)]
remove more of SVP64 from TestIssuerInternalInOrder