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c5d7d2fe3bd93d6187b0c0dcba47a1162ce0d260
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192 Commits
Author SHA1 Message Date
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 
Committed on the Free edition of March Hare Software CVSNT Server.
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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 
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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 
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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.

Committed on the Free edition of March Hare Software CVSNT Server.
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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 
Committed on the Free edition of March Hare Software CVSNT Server.
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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
jens a3c4ba6e82 - minor improvements for load/store shifter 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@430 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-15 13:21:39 +00:00
jens f34847adb1 - some new control signals in cop0_ctrl 
- added exc-Flag in WB_stage
- simplified int signals

Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@428 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-11 08:37:11 +00:00
jens b5b15b90e2 - Int-port is now at cop instead of pipeline 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@427 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-11 08:35:46 +00:00
jens d3e486b6d5 Reworked exception FSM: 
- Pipeline is now flushed and finished and all dependencies are solved before entering exception handler
  - User mode writes on status register are now correctly finished before status is altered by exception
  - Processor stalls for 2 cycles after RFE to ensure that status register is correct in user mode
- Added int-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@426 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-11 08:34:50 +00:00
jens ae50048039 - reworked exception stuff 
- removed int-port (it's now in cop)

Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@425 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-04-11 08:30:41 +00:00
jens 6983e7ebec - removed weird feature, which prevents cop registers to be written in front of exception. 
cop register behavior is now hopefully the same as general registers.
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@421 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-30 23:29:33 +00:00
jens 2e1850c19b - redesigned 
- added invalidate_all and invalidate_at control
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@420 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-30 22:26:15 +00:00
jens 599380bd10 - 'dcache_en' now doesn't depend on CYC_O_dmem_rd or write_busy 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@419 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-30 22:25:29 +00:00
jens eb22574d20 - changed reset generator and added BIU-Reset signal 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@418 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-30 09:05:19 +00:00
jens 1cbfc94fde - added control 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@417 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-29 12:03:14 +00:00
jens 4dc562bfe5 - removed MUX for RESET_VECTOR in proc_stage_pc: 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@416 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-28 18:27:05 +00:00
jens e89e61291a - assigned c0_ctrl to BIU for cache_ctrl 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@415 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-28 18:26:33 +00:00
jens ad0284bd10 - added cache_ctrl input 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@414 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-28 18:25:53 +00:00
jens 962cffac1d - added cache_ctrl record. Used in c0_ctrl_out 
Committed on the Free edition of March Hare Software CVSNT Server.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@413 cc03376c-175c-47c8-b038-4cd826a8556b
 2009-03-28 18:25:23 +00:00