- added exc-Flag in WB_stage
- simplified int signals
Committed on the Free edition of March Hare Software CVSNT Server.
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- 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
- removed int-port (it's now in cop)
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cop register behavior is now hopefully the same as general registers.
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- added invalidate_all and invalidate_at control
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ICACHE_invalidate_at, ICACHE_invalidate_all,
DCACHE_invalidate_at, DCACHE_invalidate_all.
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- due to cop_reg_we in MEM_Stage, the output register is removed
(timing is slightly degraded). The reg pointer is delayed instead by one cycle
- test-reg is now writable in user mode regardles of cop0 usability.
Committed on the Free edition of March Hare Software CVSNT Server.
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if cop is read is now implemented into instruction decoder
- generate 'stall_all' signal if ID/EX/MEM stall is active
Committed on the Free edition of March Hare Software CVSNT Server.
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if cop is read is now implemented into instruction decoder
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New cop_read is now implemented into instruction decoder
Committed on the Free edition of March Hare Software CVSNT Server.
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if cop is read is now implemented into instruction decoder
- simplified use of stall signals
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git-svn-id: http://moon:8086/svn/vhdl/trunk@398 cc03376c-175c-47c8-b038-4cd826a8556b
- removed COPz debugging identifier
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This gives possibility to load cop with memory contents (LWCz).
- dmem_dout can be EX_STAGE.reg_b by default or cop_din if cop_instr_en is asserted.
This give possibility to store cop content to memory (SWCz)
- removed idecode_rom. Uses opcode_ctrl_lines() directly.
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git-svn-id: http://moon:8086/svn/vhdl/trunk@393 cc03376c-175c-47c8-b038-4cd826a8556b
- added cache line sizes to generic
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- added interface for external cop0 and copz
- reworked cop_read and cop_write signals.
Using only cop_read which is delay in pipeline
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- reworked cop0_ctrl_in/out types
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- unified control signals for later use with Copz
- cleaned up
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jens