Subversion Repositories pentevo

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4 lvd 1 
   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
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 I | I | I | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | I | I | I | - number of cycles left in block
3 
   |   |   | 4 | 4 | 4 | 4 | 3 | 2 | 1 | 0 | 4 | 3 | 2 | 1 | 0 | 0 | 0 | 0 |   |   |   | - number of video cycles left in block
4 
   |   |  r|  r|  r|  r|  r|  -|  -|  -|  -|   |   |   |   |   |   |   |   |   |   |   | - cpu requests
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   |   |   | z | z | z | z | v | v | v | v | z | v | v | v | v |   |   |   |   |   |   | - cycle type
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   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
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   |   |   | 3 | 2 | 2 | 1 | 0 | 0 | 0 | 0 | 4 | 3 | 2 | 1 | 0 | 0 | 0 | 0 |   |   |   | - number of video cycles left in block
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   |   |   |   |  r|   |   |   |   |  r|  r|   |   |   |   |   |   |   |   |   |   |   | - cpu requests
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   |   |   | v | v | z | v | v |   |   | z | z | v | v | v | v |   |   |   |   |   |   | - cycle type
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   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
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   |   |   | 4 | 4 | 3 | 3 | 3 | 2 | 1 | 0 | 4 | 4 | 3 | 3 | 3 | 2 | 1 | 0 |   |   |   |
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   |   |  r|  r|   |  r|  r|   |  r|  -|  -|  r|   |  r|  r|   |  r|  -|  -|  r|   |   |
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   |   |   | z | z | v | z | z | v | v | v | z | z | v | z | z | v | v | v | z | z |   |
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   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
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   |   |   | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S | S |   |   |   | - stall cycles (BW=1)
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   |   |  r|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|  -|   |   |   |
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   |   |   | v | v | v | v | v | v | v | v | v | v | v | v | v | v | v | v | z |   |   |
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   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
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rules:
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if nexttype=idle and cpureq then next=cpu
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if nexttype=idle and no cpureq then next=rfsh
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if nexttype=stall then next=video
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if nexttype=block then // block is when BW<1, else stall
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begin
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	if cpureq then
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	begin
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		if blk_rem==0 or blk_rem!=vid_rem then next=cpu else next=video
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	end
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	else // no cpureq
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	begin
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		if vid_rem!=0 then next=video else next=rfsh
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	end
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end
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// trace blk_rem and vid_rem
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if currtype==idle or (currtype==block and blk_rem==0)
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begin
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	if go then nexttype=block, blk_nrem=7
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	else nexttype=idle, blk_nrem=0
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	if
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end
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else // currtype==block and blk_rem!=0
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begin
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	blk_nrem=blk_rem-1
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end
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always @(posedge clk) blk_rem<=blk_nrem;
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