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This commit is contained in:
Mateusz Faderewski 2024-07-07 18:06:05 +02:00
parent e89529275a
commit 11372e0910
1 changed files with 0 additions and 222 deletions
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222
fw/rtl/memory/memory_dma.sv
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@ -8,228 +8,6 @@ module memory_dma (
mem_bus.controller mem_bus
);
// logic stop_requested;
// logic dma_done;
// always_ff @(posedge clk) begin
// if (reset) begin
// dma_scb.busy <= 1'b0;
// stop_requested <= 1'b0;
// end else begin
// if (dma_scb.start) begin
// dma_scb.busy <= 1'b1;
// end
// if (dma_scb.busy && dma_scb.stop) begin
// stop_requested <= 1'b1;
// end
// if (dma_done) begin
// dma_scb.busy <= 1'b0;
// stop_requested <= 1'b0;
// end
// end
// end
// logic unaligned_start;
// logic unaligned_end;
// always_ff @(posedge clk) begin
// if (dma_scb.start) begin
// unaligned_start <= dma_scb.starting_address[0];
// // unaligned_end <= ;
// end
// end
// logic [26:0] bytes_remaining;
// always_ff @(posedge clk) begin
// bytes_remaining <= bytes_remaining - 27'd1;
// if (dma_scb.start) begin
// bytes_remaining <= dma_scb.transfer_length;
// end
// end
// logic mem_transfer_request;
// logic mem_wdata_buffer_ready;
// logic mem_rdata_buffer_ready;
// logic [15:0] mem_wdata_buffer;
// logic [15:0] mem_rdata_buffer;
// logic [1:0] mem_wdata_buffer_valid_bytes;
// logic mem_rdata_buffer_valid;
// always_comb begin
// mem_transfer_request = (
// !mem_bus.request || mem_bus.ack
// ) && (
// mem_wdata_buffer_ready || mem_rdata_buffer_ready
// );
// end
// always_ff @(posedge clk) begin
// if (dma_scb.start) begin
// mem_bus.write <= dma_scb.direction;
// mem_bus.address <= {dma_scb.starting_address[26:1], 1'b0};
// mem_rdata_buffer_valid <= 1'b0;
// end
// if (mem_bus.ack) begin
// mem_bus.request <= 1'b0;
// mem_bus.address <= mem_bus.address + 27'd2;
// mem_rdata_buffer <= mem_bus.rdata;
// mem_rdata_buffer_valid <= 1'b1;
// end
// if (reset) begin
// mem_bus.request <= 1'b0;
// end else if (mem_transfer_request) begin
// mem_bus.request <= 1'b1;
// mem_bus.wmask <= mem_wdata_buffer_valid_bytes;
// end
// if (!mem_bus.request || mem_bus.ack) begin
// if (mem_wdata_buffer_ready) begin
// if (dma_scb.byte_swap) begin
// mem_bus.wdata[15:8] <= mem_wdata_buffer[7:0];
// mem_bus.wdata[7:0] <= mem_wdata_buffer[15:8];
// end else begin
// mem_bus.wdata <= mem_wdata_buffer;
// end
// end
// end
// end
// // always_ff @(posedge clk) begin
// // mem_wdata_buffer_ready <= dma_scb.busy;
// // mem_wdata_buffer_valid_bytes <= 2'b10;
// // end
// logic [1:0] rx_fifo_bytes_available;
// logic [1:0] tx_fifo_bytes_available;
// always_comb begin
// rx_fifo_bytes_available = 2'd2;
// if (fifo_bus.rx_almost_empty) begin
// rx_fifo_bytes_available = 2'd1;
// end
// if (fifo_bus.rx_empty) begin
// rx_fifo_bytes_available = 2'd0;
// end
// tx_fifo_bytes_available = 2'd2;
// if (fifo_bus.tx_almost_full) begin
// tx_fifo_bytes_available = 2'd1;
// end
// if (fifo_bus.tx_full) begin
// tx_fifo_bytes_available = 2'd0;
// end
// end
// always_ff @(posedge clk) begin
// if (dma_scb.busy) begin
// if (!dma_scb.direction) begin
// // RX FIFO handling
// end
// end
// end
// always_ff @(posedge clk) begin
// if (dma_scb.busy) begin
// if (dma_scb.direction) begin
// // TX FIFO handling
// end
// end
// end
//XDDDAWDWD
// always_ff @(posedge clk) begin
// dma_done <= 1'b0;
// if (dma_scb.busy && bytes_remaining == 27'd0) begin
// // dma_done <= 1'b1;
// end
// end
// typedef enum bit [1:0] {
// } e_rx_fifo_state;
// typedef enum bit [1:0] {
// } e_tx_fifo_state;
// typedef enum bit [1:0] {
// MEM_BUS_IDLE = 2'b00,
// MEM_BUS_WAIT = 2'b01,
// MEM_BUS_TRANSFERRING = 2'b10,
// } e_mem_bus_state;
// e_mem_bus_state mem_bus_state;
// e_mem_bus_state next_mem_bus_state;
// always_ff @(posedge clk) begin
// mem_bus_state <= next_mem_bus_state;
// if (reset) begin
// mem_bus_state <= MEM_BUS_IDLE;
// end
// end
// always_comb begin
// next_mem_bus_state = mem_bus_state;
// case (mem_bus_state)
// MEM_BUS_IDLE: begin
// if (dma_scb.start) begin
// next_mem_bus_state = MEM_BUS_WAIT;
// end
// end
// MEM_BUS_WAIT: begin
// i
// end
// MEM_BUS_TRANSFERRING: begin
// end
// endcase
// end
// DMA start/stop control
logic dma_start;