Luke Kenneth Casson Leighton [Sun, 9 Jan 2022 23:29:10 +0000 (23:29 +0000)]
add linux-5.7 unit test which showed a silly error:
LDST requests through PortInterface were truncated to 48 bits,
where linux uses the top 2 bits of an address for VM/guest (Quadrant 0-3)
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 17:46:56 +0000 (17:46 +0000)]
fix MMU lookup after 2nd request (misaligned) by also updating the
ldst_r with the next address/byte_sel
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 17:27:42 +0000 (17:27 +0000)]
add microwatt mmu.bin test5 to show page-fault on misaligned LD
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 16:49:27 +0000 (16:49 +0000)]
do not clear out ldst request after TLB entry is added
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 15:42:58 +0000 (15:42 +0000)]
enable microwatt mmu test2
Luke Kenneth Casson Leighton [Sat, 8 Jan 2022 15:41:32 +0000 (15:41 +0000)]
whitespace and use exc is None not exc == None
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
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
Tobias Platen [Sat, 8 Jan 2022 13:30:25 +0000 (14:30 +0100)]
add function test_pi_ld_misalign
Tobias Platen [Fri, 7 Jan 2022 18:07:43 +0000 (19:07 +0100)]
begin testcase for misalign
Luke Kenneth Casson Leighton [Fri, 7 Jan 2022 16:59:59 +0000 (16:59 +0000)]
whitespace
Luke Kenneth Casson Leighton [Fri, 7 Jan 2022 16:57:56 +0000 (16:57 +0000)]
add missing MSRSpec import
Luke Kenneth Casson Leighton [Fri, 7 Jan 2022 12:26:45 +0000 (12:26 +0000)]
add msr_o to issuer in microwatt_compat mode
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
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
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
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)
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
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)
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
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
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
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
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
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);
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
Luke Kenneth Casson Leighton [Mon, 3 Jan 2022 14:08:19 +0000 (14:08 +0000)]
stop display of LDSTCompUnit debug info on every cycle
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.
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
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)
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
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
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
Cesar Strauss [Mon, 27 Dec 2021 13:26:45 +0000 (10:26 -0300)]
Fix indentation
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
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
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
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
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
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
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 15:32:59 +0000 (15:32 +0000)]
whitespace
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
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 07:24:11 +0000 (07:24 +0000)]
wait for MMU "done" when setting PRTBL and PIDR
Luke Kenneth Casson Leighton [Sat, 25 Dec 2021 06:57:15 +0000 (06:57 +0000)]
add microwatt mmu.bin regression test test_mmu_3
Luke Kenneth Casson Leighton [Fri, 24 Dec 2021 13:49:19 +0000 (13:49 +0000)]
enable instruction redirect in mmu ifetch test
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
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 19:47:39 +0000 (19:47 +0000)]
uniquify names in dcache.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
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 16:57:59 +0000 (16:57 +0000)]
pass in msr_reset to issuer_verilog.py
Luke Kenneth Casson Leighton [Thu, 23 Dec 2021 16:56:21 +0000 (16:56 +0000)]
add ability to set the reset values of RegFileArray
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.
Cesar Strauss [Thu, 23 Dec 2021 10:56:42 +0000 (07:56 -0300)]
Re-enable core stopped signal when stopped.
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
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
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)
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 03:53:13 +0000 (03:53 +0000)]
use correct X-Form L field in OP_MTMSRD
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
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
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 01:47:38 +0000 (01:47 +0000)]
remove unneeded state 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
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:42:16 +0000 (00:42 +0000)]
clear out instr_fault when exception is thrown
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:39:30 +0000 (00:39 +0000)]
clear instruction fault on idle/valid in Loadstore1
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
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:18:39 +0000 (00:18 +0000)]
whoops use C not Const
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:15:26 +0000 (00:15 +0000)]
whoops use C not Const
Luke Kenneth Casson Leighton [Wed, 22 Dec 2021 00:15:07 +0000 (00:15 +0000)]
remove bus_ack (found bug in Simulation, sorted)
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)
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 23:50:47 +0000 (23:50 +0000)]
continue to assert PC in FetchFSM if needed
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
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
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
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
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 12:51:45 +0000 (12:51 +0000)]
mmu code-comments
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 05:07:37 +0000 (05:07 +0000)]
comments
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 04:59:48 +0000 (04:59 +0000)]
use prtbl in proc_tbl_wait in mmu
Luke Kenneth Casson Leighton [Tue, 21 Dec 2021 04:53:45 +0000 (04:53 +0000)]
mmu.py comments
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
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
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 15:11:46 +0000 (15:11 +0000)]
more code-comments
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 15:08:20 +0000 (15:08 +0000)]
code-comments in MMU
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 15:01:38 +0000 (15:01 +0000)]
prefer not to invert when doing if/else.
Luke Kenneth Casson Leighton [Mon, 20 Dec 2021 13:42:09 +0000 (13:42 +0000)]
more code-comments
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
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
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
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
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)
Luke Kenneth Casson Leighton [Sun, 19 Dec 2021 15:49:07 +0000 (15:49 +0000)]
code-comments
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
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
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 23:49:06 +0000 (23:49 +0000)]
add link to XICS bugreport
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 15:37:38 +0000 (15:37 +0000)]
sort out reset signalling after tracking down Simulation() bug
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
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
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 01:57:20 +0000 (01:57 +0000)]
forgot to connect up I-Cache to MMU
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
Luke Kenneth Casson Leighton [Sat, 18 Dec 2021 01:22:06 +0000 (01:22 +0000)]
tidyup
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
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
Luke Kenneth Casson Leighton [Thu, 16 Dec 2021 14:55:38 +0000 (14:55 +0000)]
give names to MMU records