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291 commits 8 branches 8 tags 17 MiB
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40 commits

Author SHA1 Message Date
Olof Kindgren
1c11365ae8 Simulator-friendly cleanup of misalign_trap_sync 2021-04-22 15:44:18 +02:00
Olof Kindgren
62d5d5f8fb Remove unused wire cnt4 2021-04-18 22:01:32 +02:00
Olof Kindgren
7624466ddd Optimize serv_rf_ram_if 2021-02-15 08:50:24 +01:00
Olof Kindgren
9a0b0e877c Move shifter to mem_if 
This allows reusing the data bus registers for shift amount
 2021-02-06 23:24:23 +01:00
Olof Kindgren
6fbdea58d6 Optimize trap handling 2021-01-23 22:42:26 +01:00
Olof Kindgren
e4b773c17b Syntax fixes 2021-01-18 22:47:28 +01:00
Olof Kindgren
5e4181d204 Optimize shift operations 2021-01-18 22:46:51 +01:00
Olof Kindgren
d5febe8f63 Simplify and document trap handling 2021-01-18 22:38:07 +01:00
Olof Kindgren
17103dd1f5 Merge LSB registers into bufreg 2021-01-11 21:40:45 +01:00
Olof Kindgren
ace7b8ef44 Explain and optimize state counter 2021-01-03 00:01:09 +01:00
Olof Kindgren
c9f41b54e8 Optimize init signal 2020-12-22 22:13:57 +01:00
Olof Kindgren
116e370589 Reverse polarity of bufreg_hold signal 2020-12-06 22:39:04 +01:00
Olof Kindgren
aa16bc40b6 Move ibus_cyc handling to serv_state 2020-12-02 16:19:34 +01:00
Olof Kindgren
90ce4ff1af Syntax and reset fixes for ModelSim 2020-11-10 15:16:19 +01:00
Olof Kindgren
c1b8471678 Add reset_strategy parameter 
The reset_strategy parameter controls how much reset to apply to
SERV. It can be set to MINI for the default behaviour, or NONE to
only apply reset where absolutely needed and rely on POR to clear
FFs
 2020-11-10 15:16:19 +01:00
Olof Kindgren
554bdccba0 Silence some warnings 2020-11-10 15:16:19 +01:00
Olof Kindgren
ee6a86705d Set size of WITH_CSR to avoid Quartus warning 2020-09-29 17:52:02 +02:00
Olof Kindgren
8775b321d9 Move jump decision logic to serv_state 2020-08-13 23:37:11 +02:00
Olof Kindgren
1d311edb7d Make counter internal in serv_state 2020-04-15 10:29:50 +02:00
Olof Kindgren
09c7d6dbbf Remove FSM from serv_state 2020-04-05 00:22:44 +02:00
Olof Kindgren
8dd75fa752 Stop using states in logic expressions 2020-04-04 23:44:29 +02:00
Olof Kindgren
6b0e4fb3ea Disable misalignment traps when CSR is disabled 2020-03-27 08:55:34 +01:00
Olof Kindgren
726e520cce Fix lint warnings when CSR is disabled 2020-03-25 23:32:12 +01:00
Olof Kindgren
b48b02b8df Add parameter to disable CSR/interrupts 
Also disables timer in servant if CSR/interrupts are disabled
 2020-03-02 16:17:26 +01:00
Olof Kindgren
7f16f17ca5 Optimize CSR immediate handling 2020-02-19 10:02:48 +01:00
Olof Kindgren
badcd7ea55 Remove duplicate signals in serv_state 2020-02-17 23:48:39 +01:00
Olof Kindgren
5aa1fbe709 Stop depending on run state 2019-12-08 22:51:28 +01:00
Olof Kindgren
b516c10d72 Prepare for RF write on RF read request and optimize state FSM 2019-12-07 23:01:24 +01:00
Olof Kindgren
fc348f3a22 Fix wen delays in rf 2019-11-20 18:26:04 +01:00
Olof Kindgren
40000cbeb9 Fix IRQ 
This contains a lot of fixes as IRQ support was broken on both
RTL and zephyr side

* Interrupts are now synced to instruction lifetimes
* Interrupts are disabled on traps and mie is pushed to mpie
* Zephyr applications regenerated from rewritten Zephyr port
* Timer is 32-bit to avoid wrapping around too often
* MEPC was not read properly from CSR storage
 2019-11-19 11:06:50 +01:00
Olof Kindgren
8bc54a99ad Move mcause generation to serv_csr 2019-09-26 23:36:02 +02:00
Olof Kindgren
0f767ad2d3 Gate mem_misalign in mem_if 2019-09-26 23:23:42 +02:00
Olof Kindgren
5b96b3a938 Simplify jump flag 2019-09-26 23:12:07 +02:00
Olof Kindgren
126937f16a Rewrite RF and state machine 
Big patch, but would take more work to split it up
 2019-09-26 23:09:22 +02:00
Olof Kindgren
ca2beaf786 Pass rf_rreq through serv_state 2019-09-26 22:59:46 +02:00
Olof Kindgren
3d6eb3feca Separate rf_ready and dbus_ack 2019-09-26 22:59:46 +02:00
Olof Kindgren
920ad92bc7 Remove unused rs_en signal 2019-09-16 10:45:42 +02:00
Olof Kindgren
6518b5f30f Simplify bufreg_hold 2019-09-16 09:05:47 +02:00
Olof Kindgren
ef7706f26b Simplify two-stage signalling 2019-09-16 09:03:02 +02:00
Olof Kindgren
9575eb4fef Separate decode and state 2019-09-15 23:25:10 +02:00