riscv/rocket-chip
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Author SHA1 Message Date
Wesley W. Terpstra
42f1ae27fc Xbar: use the IdentityModule to encourage wider fanout 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
5626cdd18f util: add the IdentityModule, useful to dedup wires 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
1a87ed1193 coreplex: add externalSlaveBuffers configuration option 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
fd8a51a910 coreplex: rename externalBuffers to externalMasterBuffers 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
4911a7d44f tilelink Bus: toAsyncSlaves now supports BufferChains 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
040f7e1d49 tilelink: add Bus.toSyncSlaves for easy BufferChain attachment 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
d5c6494f59 tilelink: Bus.toRationalSlaves can have a BufferChain 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
80965e8230 tilelink Buffer: use new :=? adapter API 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
1b705f62f6 diplomacy: support :=? for unknown star inference 2017-09-07 16:03:35 -07:00
Wesley W. Terpstra
6bfea86dbf config: support p.lift(key) to optionally return a value 2017-09-07 16:03:34 -07:00
Wesley W. Terpstra
2d93262f71 RationalCrossing: use ShiftQueues 
These are faster and small don't cost much more.
 2017-09-07 16:03:34 -07:00
Wesley W. Terpstra
50d5d8c1fd ShiftQueue: added a helper object 2017-09-07 16:03:34 -07:00
Wesley W. Terpstra
3e3024c256 ShiftQueue: fix bug in !flow case 2017-09-07 16:03:34 -07:00
Wesley W. Terpstra
ed70b243bd plic: support a configurable number of interrupt register stages 2017-09-07 16:03:34 -07:00
Wesley W. Terpstra
9b55063de6 clint: support a configurable number of interrupt register stages 2017-09-07 16:03:34 -07:00
Megan Wachs
929a924779 Merge pull request #975 from freechipsproject/async_reg 
Cleanup some register primitives
 2017-09-07 13:32:54 -07:00
Megan Wachs
1320f65ae6 Merge remote-tracking branch 'origin/master' into async_reg 2017-09-07 11:27:36 -07:00
Megan Wachs
b7acb6ca3d Merge pull request #986 from freechipsproject/jtag_vpi_reset 
jtag_vpi: add some hysteresis for waiting for init_done
 2017-09-07 11:26:42 -07:00
Megan Wachs
126d56b254 synchronizers: I learn how foldRight works 2017-09-07 10:48:27 -07:00
Megan Wachs
1da6cb85ab shiftReg: Make it so that register '0' is always closest to the q output, regardless of the type of shift register created. 2017-09-07 09:57:50 -07:00
Megan Wachs
f68390e458 jtag_vpi: Use a parameter for INIT_DELAY vs constant 2017-09-07 09:06:07 -07:00
Megan Wachs
19eabb6728 jtag_vpi: add some hysterisis for waiting for init_done 2017-09-06 18:13:04 -07:00
Megan Wachs
dcafb5fea3 Merge remote-tracking branch 'origin/master' into async_reg 2017-09-06 11:07:19 -07:00
Megan Wachs
3c4b472f66 shift regs: remove some unnecessary primitives, and add some that actually are necessary 2017-09-06 10:37:59 -07:00
Jim Lawson
f1b7666d21 Jtagresettobool - add explicit toBool cast now required on reset. (#984) 
Add explicit toBool cast on reset, for chisel3 compatability
 2017-09-06 09:49:47 -07:00
Wesley W. Terpstra
55a0df4186 Merge pull request #982 from freechipsproject/frontbus3 
Add a FrontBus to which low-bandwidth bus masters attach
 2017-09-06 02:38:55 +02:00
Megan Wachs
777f052f95 regs: Add named/initial value ShiftRegister primitives so they are all in one place 2017-09-05 17:32:53 -07:00
Wesley W. Terpstra
b1cacc56ad SystemBus: restore correct order of FIFOFixer and Buffer 2017-09-05 16:41:39 -07:00
Wesley W. Terpstra
b74a419bfb FrontBus: FIFOFixer should not have a buffer between it and Xbar 2017-09-05 16:27:57 -07:00
Megan Wachs
e9e46db600 sync reg: Rename the file to reflect the more generic shift registers also in the file. 2017-09-05 15:54:25 -07:00
Megan Wachs
5df23c5514 Synchronizers: remove some newlines and unncessary gen's 2017-09-05 15:17:21 -07:00
Wesley W. Terpstra
e65f49b89a FrontBus: attach to splitter for cross-chip visibility 2017-09-05 15:03:41 -07:00
Wesley W. Terpstra
5886025b1a sbus => pbus: 2 buffers should already be enough 
There is a buffer on the sbus backside.
There is a buffer on the pbus frontside.

Between them is only an AtomicAutomata.
That should be enough for most designs.
 2017-09-05 15:03:38 -07:00
Henry Cook
a902e15987 pbus: clarify that we are adding buffers when attaching to sbus 2017-09-05 15:03:38 -07:00
Henry Cook
8fc4d78c84 frontbus: provide fifofixer on the side of the front bus where masters connect 2017-09-05 15:03:38 -07:00
Megan Wachs
667d966410 TLBuffer: Create a wrapper module for TLBufferChain, to allow for more stable naming 2017-09-05 15:03:38 -07:00
Megan Wachs
94f06dc85c pbus: turn down overkill buffering between PBus and SBus 2017-09-05 15:03:38 -07:00
Megan Wachs
c353f68dc0 buses: name dummy buffers too 2017-09-05 15:03:38 -07:00
Henry Cook
3bde9506c6 coreplex: allow buffer chains on certain bus ports 2017-09-05 15:03:36 -07:00
Megan Wachs
57d0360c35 frontbus: Name the connection. 2017-08-30 18:07:34 -07:00
Megan Wachs
c99afe4c66 buses: Name all the things. 2017-08-30 17:31:42 -07:00
Henry Cook
32cb358c81 coreplex: include optional tile name for downstream name stabilization 2017-08-30 15:48:55 -07:00
Megan Wachs
183fefb2b9 Front/SystemBus: allow naming the intermediate TLNodes that get sprinkled in 2017-08-30 15:27:56 -07:00
Wesley W. Terpstra
d5b62dffda SystemBus: add stupidly many (4 more) buffers from sbus=>pbus 
This should probably be reverted.
 2017-08-30 14:22:49 -07:00
Henry Styles
f7330028cc Add optional frontbus for peripherals mastering into SBus. Switch FF and Buffer order on non-tile masters into SBus. Buffer non-L2 side of splitter 2017-08-30 14:22:49 -07:00
Wesley W. Terpstra
173f185b17 Merge pull request #976 from freechipsproject/system-buffer 
SystemBus: add output buffering
 2017-08-30 23:22:13 +02:00
Wesley W. Terpstra
656609d610 SystemBus: split FIFOFixers along bus boundaries 
If you have a system with a lot of periphery slaves, you wan to FIFO fix
them on the periphery bus rather than paying the circuit cost at the sbus.
 2017-08-30 13:28:11 -07:00
Megan Wachs
a3bc5f2e33 synchronizers: Add a generic shift register and then extend from it, since an asynchronously resettable shift register is also a useful primitive 2017-08-30 12:59:16 -07:00
Megan Wachs
8139014c9e syncrhonizers: Remove unused sync from superclass 2017-08-30 12:33:03 -07:00
Megan Wachs
9dd6c4c32d synchronizers: New chisel ways of cloning type and use simpler lambda function 2017-08-30 12:11:14 -07:00