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Adding stride to EDMA

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-Still need some time to think through this..wip
This commit is contained in:
Andreas Olofsson 2015-04-28 16:54:09 -04:00
parent a2ceb8ff6e
commit 22bf7a6b0e
1 changed files with 23 additions and 13 deletions
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36
edma/hdl/edma.v
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@ -46,6 +46,7 @@ module edma (/*AUTOARG*/
reg [AW-1:0] edma_srcaddr_reg;
reg [AW-1:0] edma_dstaddr_reg;
reg [AW-1:0] edma_count_reg;
reg [AW-1:0] edma_stride_reg;
reg [8:0] edma_cfg_reg;
reg [1:0] edma_status_reg;
reg [31:0] mi_dout;
@ -56,6 +57,7 @@ module edma (/*AUTOARG*/
wire edma_cfg_write ;
wire edma_srcaddr_write;
wire edma_dstaddr_write;
wire edma_stride_write;
wire edma_count_write;
wire edma_message;
wire edma_expired;
@ -73,9 +75,10 @@ module edma (/*AUTOARG*/
//DMA configuration
assign edma_cfg_write = edma_write & (mi_addr[RFAW+1:2]==`EDMACFG);
assign edma_srcaddr_write = edma_write & (mi_addr[RFAW+1:2]==`EDMASRC);
assign edma_dstaddr_write = edma_write & (mi_addr[RFAW+1:2]==`EDMADST);
assign edma_srcaddr_write = edma_write & (mi_addr[RFAW+1:2]==`EDMASRCADDR);
assign edma_dstaddr_write = edma_write & (mi_addr[RFAW+1:2]==`EDMADSTADDR);
assign edma_count_write = edma_write & (mi_addr[RFAW+1:2]==`EDMACOUNT);
assign edma_stride_write = edma_write & (mi_addr[RFAW+1:2]==`EDMASTRIDE);
//###########################
//# DMACFG
@ -113,11 +116,9 @@ module edma (/*AUTOARG*/
edma_status_reg[0] <= edma_enable & ~edma_expired;//dma busy
edma_status_reg[1] <= edma_status_reg[1] | (edma_enable & edma_error);
end
//###########################
//# DMASRC
//# EDMASRCADDR
//###########################
always @ (posedge clk or posedge reset)
if(reset)
@ -129,7 +130,7 @@ module edma (/*AUTOARG*/
assign edma_srcaddr[31:0] = edma_srcaddr_reg[31:0];
//###########################
//# DMADST
//# EDMADSTADR
//###########################
always @ (posedge clk or posedge reset)
if(reset)
@ -138,11 +139,11 @@ module edma (/*AUTOARG*/
edma_dstaddr_reg[AW-1:0] <= mi_din[AW-1:0];
else if (edma_enable & ~edma_wait)
edma_dstaddr_reg[AW-1:0] <= edma_dstaddr_reg[AW-1:0] + (1<<edma_datamode[1:0]);
assign edma_dstaddr[31:0] = edma_dstaddr_reg[31:0];
//###########################
//# DMACOUNT
//# EDMACOUNT
//###########################
always @ (posedge clk or posedge reset)
if(reset)
@ -155,12 +156,21 @@ module edma (/*AUTOARG*/
assign edma_last_tran = (edma_count_reg[AW-1:0]==32'b1);
assign edma_expired = (edma_count_reg[AW-1:0]==32'b0);
//###########################
//# EDMASTRIDE
//###########################
//NOTE: not supported yet, need to think about feature...
always @ (posedge clk or posedge reset)
if(reset)
edma_stride_reg[AW-1:0] <= 'd0;
else if (edma_stride_write)
edma_stride_reg[AW-1:0] <= mi_din[AW-1:0];
//###########################
//# DUMMY DATA
//###########################
assign edma_data[31:0] = TEST_PATTERN;
//###############################
//# DATA READBACK MUX
//###############################
@ -171,8 +181,8 @@ module edma (/*AUTOARG*/
case(mi_addr[RFAW+1:2])
`EDMACFG: mi_dout[31:0] <= {23'b0, edma_cfg_reg[8:0]};
`EDMASTATUS: mi_dout[31:0] <= {30'b0, edma_status_reg[1:0]};
`EDMASRC: mi_dout[31:0] <= {edma_srcaddr_reg[31:0]};
`EDMADST: mi_dout[31:0] <= {edma_dstaddr_reg[31:0]};
`EDMASRCADDR:mi_dout[31:0] <= {edma_srcaddr_reg[31:0]};
`EDMADSTADDR:mi_dout[31:0] <= {edma_dstaddr_reg[31:0]};
`EDMACOUNT: mi_dout[31:0] <= {edma_count_reg[31:0]};
default: mi_dout[31:0] <= 32'd0;
endcase