riscv/rocket-chip
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Author SHA1 Message Date
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
Megan Wachs
bd32f0c122 synchronizers: properly pass parameters up to the superclass 2017-08-30 11:58:25 -07:00
Megan Wachs
483e63da19 synchronizers: Correctly pass the width through 2017-08-30 11:50:25 -07:00
Megan Wachs
91c3fa2865 Merge pull request #979 from freechipsproject/buffer_params_debuginfo 
TLBuffer: Add a nodedebugstring
 2017-08-29 17:52:50 -07:00
Megan Wachs
a62ce0afe6 TLBuffer: Add a nodedebugstring for quick browsing of the properties of the buffer. 2017-08-29 10:36:46 -07:00
Megan Wachs
c473538e36 Merge remote-tracking branch 'origin/master' into async_reg 2017-08-28 17:19:03 -07:00
Megan Wachs
451334ac73 Add 1-deep synchronizer register for output of AsyncQueue 2017-08-28 17:18:54 -07:00
Wesley W. Terpstra
bf19440db5 SystemBus: use a full buffer on slaves 2017-08-26 02:47:04 -07:00
Megan Wachs
85c39b2f97 syncregs: Not sure the use case for SynchronizerShiftRegInit, so remove it YAGNI 2017-08-24 17:47:04 -07:00
Megan Wachs
4e773f4738 syncregs: Use synchronizer primivites for LevelSyncCrossing 2017-08-24 17:42:31 -07:00
Megan Wachs
130b24355f syncregs: Use synchronizer primitives for IntXing 2017-08-24 17:39:07 -07:00
Megan Wachs
8b462d1595 syncregs: Use common primitives for AsyncQueue grey code synchronizers 2017-08-24 17:34:07 -07:00
Megan Wachs
3461cb47cc syncregs: Make Reset catcher use the synchronizer primitive 2017-08-24 17:26:38 -07:00
Megan Wachs
c78ee9f0e4 syncreg: Refactor common code 2017-08-24 17:18:04 -07:00
Megan Wachs
d83a6dc6af syncregs: Add utilities for Synchronizing Shift Registers 2017-08-24 16:55:17 -07:00
Megan Wachs
bdaae40035 Merge pull request #973 from freechipsproject/named_buffers 
systemBus: allowing naming the TLBuffers which get inserted
 2017-08-24 16:31:14 -07:00
Megan Wachs
7f683eeb24 async_regs: Make modules have predictable names 2017-08-24 15:33:53 -07:00
Megan Wachs
0f75ebee92 async_reg: Rename the file to match scalastyle 2017-08-24 15:31:29 -07:00
Megan Wachs
103b6bc6d3 systemBus: allowing naming the TLBuffers which get inserted 2017-08-24 14:49:12 -07:00
Wesley W. Terpstra
17134125e1 SystemBus: remove misnamed functions (#972) 
These functions were actually for cross connecting chips.
 2017-08-24 23:35:01 +02:00
Megan Wachs
6e689f55ed Merge pull request #965 from freechipsproject/quash_x 
async_reset_reg: Squash X's the same as for synchronous reg
 2017-08-21 16:48:25 -07:00
Megan Wachs
81890e3a42 async_reg: Clean up some funky indentation 2017-08-21 16:06:36 -07:00
Megan Wachs
4f45379863 async_reset_reg: Squash X's the same as for reset reg 2017-08-21 14:33:19 -07:00
Andrew Waterman
82df766f4a Merge pull request #963 from freechipsproject/interrupt-order 
Respect ISA requirements on interrupt priority order
 2017-08-18 00:10:19 -07:00
Andrew Waterman
8087a205cc Remove redundant check in interrupt priority encoding 
chooseInterrupts already sorts M interrupts above S interrupts.
 2017-08-17 22:23:42 -07:00
Andrew Waterman
cbe7c51b50 Respect ISA requirements on interrupt priority order 
a62e76cb16
 2017-08-17 21:27:08 -07:00
Shreesha Srinath
b1719cfee0 Fixing requirements for PAddrBits (#961) 
Previously, the requirement for PAddrBits only checked to be equal or greater than the bundle bits. Changing it to check for these to match exactly as for cases when the PAddrBits greater than address bits we could run into scenarios which cause possible address wrap around issues.
 2017-08-17 11:53:59 -07:00