94 Commits

Author	SHA1	Message	Date
Ross Thompson	fbf543bf57	Updated HPTW to route access faults generated by the HPTW to the original access type either instruction access fault, load access fault or store access fault.	2022-11-29 17:19:31 -06:00
Ross Thompson	0ed0c18aa1	Fixed a very subtle bug in the trap handler. It was possible to select the wrong cause if an interrupt was pending, but it was supressed by Committed and another exception triggered.	2022-10-02 16:21:21 -05:00
Ross Thompson	32449dfe97	Hmm. the icache and ifu didn't have a CommittedF signals going back to the privileged unit. They probably should. If an interrupt occurred during the middle of an instruction fetch icache miss I think it would corrupt the icache.	2022-09-28 17:39:51 -05:00
David Harris	05aa18fe14	Cleaned up fcvt selection control to IEU and FPUIllegalInst signals	2022-08-23 12:17:19 -07:00
David Harris	129fab3794	Provided sfencevmaM to hazard unit and renamed TLBFlush signals to sfencevma going into LSU/IFU. Preparing for SFENCE.VMA to flush the pipeline, but that is not yet working.	2022-06-02 14:18:55 +00:00
David Harris	31815422d2	../src/privileged/csrc.sv	2022-05-31 21:12:17 +00:00
David Harris	2935188035	Moved delegation logic from privmode to trap to simplify interface	2022-05-31 14:58:11 +00:00
Ross Thompson	9079e67aae	Updated fpga debugger.	2022-05-17 23:04:01 -05:00
David Harris	f5e2cff45a	Cause simplification	2022-05-12 23:47:21 +00:00
David Harris	6303d4e81f	Cause simplification	2022-05-12 23:39:10 +00:00
David Harris	c4621c5b6b	Cause simplification	2022-05-12 23:37:40 +00:00
David Harris	7daf631c13	Cause simplification	2022-05-12 23:33:35 +00:00
David Harris	de51c7eeb3	Cause simplification	2022-05-12 23:33:22 +00:00
David Harris	803bfc4fe4	Cause simplification	2022-05-12 23:29:35 +00:00
David Harris	2d27d20db9	Cause simplification	2022-05-12 23:27:02 +00:00
David Harris	87dadc8208	trap/csr cleanup	2022-05-12 22:26:21 +00:00
David Harris	ea0d9fd9a8	More trap/csr simplification	2022-05-12 22:06:03 +00:00
David Harris	2eb6a65fa2	More trap/csr simplification	2022-05-12 22:04:20 +00:00
David Harris	2d8ccbd4ea	More trap/csr simplification	2022-05-12 22:00:23 +00:00
David Harris	417e36bff5	More trap/csr simplification	2022-05-12 21:55:50 +00:00
David Harris	ca6b7716e2	Simplifying trap/csr interface	2022-05-12 21:50:15 +00:00
David Harris	56c154f2e7	Simplified MTVAL logic	2022-05-12 21:36:13 +00:00
David Harris	730bcac6ba	Partitioned privileged pipeline registers into module	2022-05-12 20:45:45 +00:00
David Harris	c5868b81e4	privileged cleanup	2022-05-12 20:21:33 +00:00
David Harris	5537c33196	Formatting cleanup	2022-05-12 18:37:47 +00:00
David Harris	449472ba58	Moved Breakpoint and Ecall fault logic into privdec	2022-05-12 16:45:53 +00:00
David Harris	9f8dca5190	Moved TLB Flush logic into privdec	2022-05-12 16:41:52 +00:00
David Harris	1d01bc98a4	Moved WFI timeout into privdec	2022-05-12 16:22:39 +00:00
David Harris	21c1e58829	Partitioned privilege mode fsm into new module	2022-05-12 16:16:42 +00:00
David Harris	5acb526375	More unused signal cleanup	2022-05-12 15:21:09 +00:00
David Harris	7e764fbda1	More unused signal cleanup	2022-05-12 15:15:30 +00:00
David Harris	e2dea3bb89	Removed more unused signals, simplified csri state	2022-05-12 15:10:10 +00:00
David Harris	fb725a9e0a	Clean up unused signals	2022-05-12 14:49:58 +00:00
David Harris	15659b05e4	Simplifed mstatus.TSR handling	2022-05-12 14:09:52 +00:00
David Harris	877c4eefd1	Fixed typo in csrm	2022-05-12 06:55:39 -07:00
David Harris	32f8841f79	Added MCONFIGPTR CSR hardwired to 0	2022-05-12 04:31:45 +00:00
David Harris	a8c9f504fa	Added M prefix for MTimerInt and MSwInt to distinguish from future supervisor SwInt	2022-05-11 15:08:33 +00:00
David Harris	91472eb948	Removed M suffix from interrupts because they are generated asynchronously to pipeline	2022-05-11 14:41:55 +00:00
David Harris	8066ba45e8	Preliminary support for big endian modes. Regression passes but no big endian tests written yet.	2022-05-08 06:46:35 +00:00
David Harris	2792d77e4e	Fixed bug in delegated interrupts not being taken	2022-05-08 04:50:27 +00:00
David Harris	2cdd49c7d2	WFI terminates when an interrupt is pending even if interrupts are globally disabled	2022-05-08 04:30:46 +00:00
David Harris	66424a8246	SFENCE.VMA should be illegal in user mode	2022-05-05 15:15:02 +00:00
David Harris	866540580a	SFENCE.VMA should be illegal in user mode	2022-05-05 14:59:52 +00:00
David Harris	c100c9893b	wally32priv and wally64priv now passing WALLY-status-tw. Fixed privileged.sv to produce the correct EPC on timeouts	2022-05-05 14:37:21 +00:00
David Harris	94459ade3d	Changed WFI to stall pipeline in memory stage	2022-05-05 02:03:44 +00:00
David Harris	554c2b3550	Illegal instruction fault when running FPU instruction with STATUS_FS = 0	2022-05-03 18:32:01 +00:00
David Harris	9c4de0e9c1	FPU generates illegal instruction if MSTATUS.FS = 00	2022-05-03 11:56:31 +00:00
Kip Macsai-Goren	8ad920fcb3	fixed initial value, timing on fs bits changing after floating point instruction	2022-04-25 19:17:29 +00:00
David Harris	cf1fde62fb	Restored MPRV behavior per spec	2022-04-25 14:52:18 +00:00
David Harris	0ede295e88	Added dummy mstatus byte endianness fields tied to 0, mstatush register, removed UIE and UPIE depricated fields	2022-04-25 14:49:00 +00:00