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0499e58f4bb98b940a0a5a341787fff12211029c
Commit Graph
156 Commits
Author SHA1 Message Date
jens 148c71d2b4 update 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@759 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-03-07 16:11:03 +00:00
jens 9bf3b46cf3 - added generic 'simulate_tx' for output of TX-Data into simulation log 
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git-svn-id: http://moon:8086/svn/vhdl/trunk@758 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-03-07 16:10:57 +00:00
jens c6983bd768 - added MRDY_O for I/D-Cache 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@757 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-03-07 16:00:53 +00:00
jens e5f5e1d0e3 Initial version 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@756 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-22 19:48:45 +00:00
jens daed8e12a0 - cleaned up 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@753 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-14 15:44:22 +00:00
jens 5889dc2d4a - added new FIFO generics 
- no STB_O if Bus input FIFO full.
  => Bus out FIFO is read if SRDY_I = '1'  and MRDY_O = '1'
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@748 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-11 21:56:03 +00:00
jens 385aa5e008 - changed frequencies into MHz units (real data type) 
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git-svn-id: http://moon:8086/svn/vhdl/trunk@733 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-09 07:25:49 +00:00
jens c42c0ba5b8 - added asynchronous BUS FIFOs 
- added cpu_clk
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git-svn-id: http://moon:8086/svn/vhdl/trunk@726 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-07 19:12:19 +00:00
jens e0e8566bec - made time specs in nano seconds 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@725 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-07 19:11:55 +00:00
jens 7f8a82d9ba - added asynchronous BUS FIFOs 
- added cpu_clk
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git-svn-id: http://moon:8086/svn/vhdl/trunk@724 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-07 19:01:33 +00:00
jens 2e3f14ea17 - added 16-depth Bus input FIFO (2 cycles additional latency) 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@709 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-06 14:07:47 +00:00
jens 0b403e7a58 Minor changes 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@708 cc03376c-175c-47c8-b038-4cd826a8556b
 2010-02-06 13:16:05 +00:00
jens 1f387fdd75 - Loads image for bugfix: instructions uncached LW => cached LW (with cache-miss) was buggy. 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@682 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-11-24 11:35:08 +00:00
jens 21b41da6e2 - bugfix: instructions uncached LW => cached LW (with cache-miss) was buggy. 
Symptoms:
  ...
1.: lw     $a0, 32($s0)  # Uncached load from memory mapped I/O
2.: lw     $a2, 4($v0)   # Cached load and cache-miss.
                                  # $a0 receives same value as $a2.
                                  # CPU skips writing $a0 due to busy flag of D-Cache,
                                  # which is already active in the previous cycle
...

Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@681 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-11-24 11:33:37 +00:00
jens 3eef19bb28 - removed unused 'en' pin. 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@680 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-11-24 11:30:36 +00:00
jens 2db39f4504 - zero lead-in / lead-out, 
but added 4 cycles relelease necessary for writes. See tWR in datasheet)
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@568 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-30 13:55:06 +00:00
jens a38101e448 - Minor changes 
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git-svn-id: http://moon:8086/svn/vhdl/trunk@566 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-30 12:27:36 +00:00
jens e85aded32a update 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@565 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-30 12:27:18 +00:00
jens 9ad3c6cd4e - now 30 ns 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@562 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-29 22:57:11 +00:00
jens a3d54edf64 - added 'page_mode_en' for async_port 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@551 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-28 22:45:36 +00:00
jens 9ea208eaf0 -added new page_read parameters 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@550 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-28 22:45:24 +00:00
jens 6da937fe58 - flash has access time of 25 ns 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@548 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-28 10:43:27 +00:00
jens 1d72b92b46 - Booting from Flash is now from cached area (faster) 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@547 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-27 23:46:07 +00:00
jens c8306cafc4 - changed names 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@534 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-27 21:22:03 +00:00
jens 4a5178da93 - added flash_we_n 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@533 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-27 21:21:50 +00:00
jens fe950520b4 update 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@525 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-17 17:35:37 +00:00
jens a07b596168 - added some comments 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@524 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-17 17:33:45 +00:00
jens d8083946f3 - changed NMI/RST behavior: reset exception entered after NMI/RST transition 1 => 0. 
- BEV = 1 after NMI/RST (like hard reset)
- status not KUc,IEc not saved to KUp, IEp at NMI/RST (like hard reset)
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@523 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-17 17:19:41 +00:00
jens 584ac47a8a - Bugfix: register bypass with same target register, used for unaligned loads (LWL, LWR), was incorrect. 
Newlib's memcpy() (MIPS-optimized) uses this for unaligned copy.
  Consectutive load instructions without nops using same target register (which is legal) like
   lw $1, 0(mem)
   lwl $1, 1(mem)
  or
   lwl $1, 0(mem)
   lwr $1, 1(mem)
  or similar, lead to incorrect result. Now it's fixed.


git-svn-id: http://moon:8086/svn/vhdl/trunk@519 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-17 12:58:28 +00:00
jens 9a1a5579bf Bugfix in gen_fill_mask_rom (wrong result on zero shift amounts due to width mismatch) 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@509 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-14 21:15:31 +00:00
jens e7b85e0138 - added pin non-maskable interrupt (NMI). 
Exception vector is reset vector at (X"BFC00000")


Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@490 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-03 16:41:26 +00:00
jens c5027772aa - added pin non-maskable interrupt (NMI). 
Exception vector is reset vector at (X"BFC00000")
-  Interrupt pending flags (IP) are not masked in hardware by IM.

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git-svn-id: http://moon:8086/svn/vhdl/trunk@489 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-10-03 16:40:29 +00:00
jens 830f840b83 - minor changes 
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git-svn-id: http://moon:8086/svn/vhdl/trunk@487 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-08-08 18:54:45 +00:00
jens 27d59cb442 - COP dout generated from MEM_ex_result and DMEM_din with multiplexer, to reduce fanout of MEM.data. 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@485 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-08-08 14:00:28 +00:00
jens 2316880678 minor changes 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@483 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-08-08 12:39:01 +00:00
jens 331590cc36 - Status.TS tied high to indicate absence of an MMU 
- Removed possibility of writng read-only status bits
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@481 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-08-08 12:37:43 +00:00
jens bea098d743 - doubled I-Cache size to 32kByte 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@479 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-10 09:47:24 +00:00
jens 1fe9a2c398 - replaced comparator-based fill-stage with rom-based fill-stage 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@478 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-09 19:19:03 +00:00
jens 6449f3fa78 - minor changes (better timing) 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@477 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-08 22:19:35 +00:00
jens 1884f3158c - minor changes (bug) 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@476 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-08 21:48:31 +00:00
jens 9794a67ba6 - Reset vector is now injected during reset like an ordinary exception. 
This minimizes pc.nxt MUX (Better timing)
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@475 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-08 21:44:27 +00:00
jens 6f74cd1662 - removed register output latch (latch introduced global clock buffer, which is deprecated) 
- CPU is configured as BIG-endian
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@474 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-06 21:35:03 +00:00
jens 0edf614e5e - removed reference to fifo_sync_dist. 
Use fifo_sync instead and specified ditributed ram_style
  in XCF-file during synthesis

Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@472 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-06 10:36:58 +00:00
jens eabf73aa4f - renamed pc.is_branch:boolean to pc.branch_take:std_logic 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@471 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-05 22:07:19 +00:00
jens 3de1c312bb - removed register output latch (latch introduced global clock buffer, which is deprecated) 
- added separate reg_pointer for read/write
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@470 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-05-05 11:07:02 +00:00
jens 4c309f1eef - SR(7 .. 0) are not writable in user-mode 
- registered 'ctrl_out.int' for better timing
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@458 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-27 08:23:08 +00:00
jens 20dc046c75 - status register is always writable 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@457 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-19 17:57:33 +00:00
jens 2e57a02355 - changed Exception vector from 0x80000180 to 0x80000080 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@454 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-17 20:30:57 +00:00
jens 2fb198d941 - added port 'eb' for Endian-big selection 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@433 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-15 13:23:30 +00:00
jens d3c322ca48 - bugfix: wrong 'pa_offset' when big-endian and half-word load/store 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@431 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-15 13:22:31 +00:00