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uncore cleanup

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This commit is contained in:
David Harris 2023-01-14 17:00:58 -08:00
parent 9ac905b5c0
commit ae7e7b57ec
3 changed files with 44 additions and 108 deletions
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55
pipelined/src/sdc
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@ -1,55 +0,0 @@
SD Flash interface
regsiter map:
1. clock divider
2. address
3. data register
4. command register
5. size register
Number of bytes to read or write.
6. status register
1. bits 11 to 0: bytes currently in the buffer
2. bits 12 to 29: reservered
3. bit 30: fault
4. bit 31: busy
5. bits XLEN-1 to 32: reservered
non dma read operation
1. write the address regsiter
2. write the command register to read
3. wait for interrupt or pool on status
4. Check status for fault and number of bytes.
5. read the data register for 512 bytes. (64 ld, or 128 lw)
non dma write operation
1. write address register
2. write data register for 512 bytes. (64 sd, or 128 sw)
3. write command register to write data to flash
4. wait for interrupt or pool on status
5. check status for fault and number of bytes written.
implement dma transfers later
interrupts
1. operation done
2. bus error (more of an exception)
Occurs if attempting to do an operation while the flash controller is busy.
ie. if status[31] is set generate an interrupt
This is tricky in a multiprocessor environment.
tasks
1. [-] Remove all AFRL identifiers
2. [X] get the existing sdc compiled on wally.
1. [X] use wally primatives over tcore's
3. build abhlite interface with the above registers and necessary fsm.
1. [ ] The sd card reader uses a 4 bit data interface. We can change this to be something
more pratical.
4. write test programs
5. [X] Convert VHDL to system verilog

4
pipelined/src/uncore/sdc/SDCcounter.sv
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@ -3,13 +3,13 @@
//
// Written: Richard Davis
// Modified: Ross Thompson
// Converted to system verilog.
// Converted to SystemVerilog.
//
// Purpose: basic up counter
//
// A component of the CORE-V-WALLY configurable RISC-V project.
//
/ SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
//
// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file
// except in compliance with the License, or, at your option, the Apache License version 2.0. You

63
pipelined/src/uncore/uncore.sv
View File

@ -48,17 +48,18 @@ module uncore (
output logic HREADY, HRESP,
output logic HSELEXT,
// peripheral pins
output logic MTimerInt, MSwInt, MExtInt, SExtInt,
input logic [31:0] GPIOPinsIn,
output logic [31:0] GPIOPinsOut, GPIOPinsEn,
input logic UARTSin,
output logic UARTSout,
output logic SDCCmdOut,
output logic SDCCmdOE,
input logic SDCCmdIn,
input logic [3:0] SDCDatIn,
output logic SDCCLK,
output logic [63:0] MTIME_CLINT
output logic MTimerInt, MSwInt, // Timer and software interrupts from CLINT
output logic MExtInt, SExtInt, // External interrupts from PLIC
output logic [63:0] MTIME_CLINT, // MTIME, from CLINT
input logic [31:0] GPIOPinsIn, // GPIO pin input value
output logic [31:0] GPIOPinsOut, GPIOPinsEn, // GPIO pin output value and enable
input logic UARTSin, // UART serial input
output logic UARTSout, // UART serial output
output logic SDCCmdOut, // SD Card command output
output logic SDCCmdOE, // SD Card command output enable
input logic SDCCmdIn, // SD Card command input
input logic [3:0] SDCDatIn, // SD Card data input
output logic SDCCLK // SD Card clock
);
logic [`XLEN-1:0] HREADRam, HREADSDC;
@ -92,54 +93,42 @@ module uncore (
assign {HSELDTIM, HSELIROM, HSELEXT, HSELBootRom, HSELRam, HSELCLINT, HSELGPIO, HSELUART, HSELPLIC, HSELSDC} = HSELRegions[10:1];
// AHB -> APB bridge
ahbapbbridge #(4) ahbapbbridge
(.HCLK, .HRESETn, .HSEL({HSELUART, HSELPLIC, HSELCLINT, HSELGPIO}), .HADDR, .HWDATA, .HWSTRB, .HWRITE, .HTRANS, .HREADY,
ahbapbbridge #(4) ahbapbbridge (
.HCLK, .HRESETn, .HSEL({HSELUART, HSELPLIC, HSELCLINT, HSELGPIO}), .HADDR, .HWDATA, .HWSTRB, .HWRITE, .HTRANS, .HREADY,
.HRDATA(HREADBRIDGE), .HRESP(HRESPBRIDGE), .HREADYOUT(HREADYBRIDGE),
.PCLK, .PRESETn, .PSEL, .PWRITE, .PENABLE, .PADDR, .PWDATA, .PSTRB, .PREADY, .PRDATA);
assign HSELBRIDGE = HSELGPIO | HSELCLINT | HSELPLIC | HSELUART; // if any of the bridge signals are selected
// on-chip RAM
if (`UNCORE_RAM_SUPPORTED) begin : ram
ram_ahb #(
.BASE(`UNCORE_RAM_BASE), .RANGE(`UNCORE_RAM_RANGE)) ram (
.HCLK, .HRESETn,
.HSELRam, .HADDR,
.HWRITE, .HREADY,
.HTRANS, .HWDATA, .HWSTRB, .HREADRam,
.HRESPRam, .HREADYRam);
ram_ahb #(.BASE(`UNCORE_RAM_BASE), .RANGE(`UNCORE_RAM_RANGE)) ram (
.HCLK, .HRESETn, .HSELRam, .HADDR, .HWRITE, .HREADY,
.HTRANS, .HWDATA, .HWSTRB, .HREADRam, .HRESPRam, .HREADYRam);
end
if (`BOOTROM_SUPPORTED) begin : bootrom
rom_ahb #(.BASE(`BOOTROM_BASE), .RANGE(`BOOTROM_RANGE))
bootrom(
.HCLK, .HRESETn,
.HSELRom(HSELBootRom), .HADDR,
.HREADY, .HTRANS,
bootrom(.HCLK, .HRESETn, .HSELRom(HSELBootRom), .HADDR, .HREADY, .HTRANS,
.HREADRom(HREADBootRom), .HRESPRom(HRESPBootRom), .HREADYRom(HREADYBootRom));
end
// memory-mapped I/O peripherals
if (`CLINT_SUPPORTED == 1) begin : clint
clint_apb clint(
.PCLK, .PRESETn, .PSEL(PSEL[1]), .PADDR(PADDR[15:0]), .PWDATA, .PSTRB, .PWRITE, .PENABLE,
.PRDATA(PRDATA[1]), .PREADY(PREADY[1]),
.MTIME(MTIME_CLINT),
.MTimerInt, .MSwInt);
clint_apb clint(.PCLK, .PRESETn, .PSEL(PSEL[1]), .PADDR(PADDR[15:0]), .PWDATA, .PSTRB, .PWRITE, .PENABLE,
.PRDATA(PRDATA[1]), .PREADY(PREADY[1]), .MTIME(MTIME_CLINT), .MTimerInt, .MSwInt);
end else begin : clint
assign MTIME_CLINT = 0;
assign MTimerInt = 0; assign MSwInt = 0;
end
if (`PLIC_SUPPORTED == 1) begin : plic
plic_apb plic(
.PCLK, .PRESETn, .PSEL(PSEL[2]), .PADDR(PADDR[27:0]), .PWDATA, .PSTRB, .PWRITE, .PENABLE,
.PRDATA(PRDATA[2]), .PREADY(PREADY[2]),
.UARTIntr, .GPIOIntr,
.MExtInt, .SExtInt);
plic_apb plic(.PCLK, .PRESETn, .PSEL(PSEL[2]), .PADDR(PADDR[27:0]), .PWDATA, .PSTRB, .PWRITE, .PENABLE,
.PRDATA(PRDATA[2]), .PREADY(PREADY[2]), .UARTIntr, .GPIOIntr, .MExtInt, .SExtInt);
end else begin : plic
assign MExtInt = 0;
assign SExtInt = 0;
end
if (`GPIO_SUPPORTED == 1) begin : gpio
gpio_apb gpio(
.PCLK, .PRESETn, .PSEL(PSEL[0]), .PADDR(PADDR[7:0]), .PWDATA, .PSTRB, .PWRITE, .PENABLE,
@ -197,7 +186,9 @@ module uncore (
// takes more than 1 cycle to repsond it needs to hold on to the old select until the
// device is ready. Hense this register must be selectively enabled by HREADY.
// However on reset None must be seleted.
flopenl #(11) hseldelayreg(HCLK, ~HRESETn, HREADY, HSELRegions, 11'b1, {HSELDTIMD, HSELIROMD, HSELEXTD, HSELBootRomD, HSELRamD, HSELCLINTD, HSELGPIOD, HSELUARTD, HSELPLICD, HSELSDCD, HSELNoneD});
flopenl #(11) hseldelayreg(HCLK, ~HRESETn, HREADY, HSELRegions, 11'b1,
{HSELDTIMD, HSELIROMD, HSELEXTD, HSELBootRomD, HSELRamD,
HSELCLINTD, HSELGPIOD, HSELUARTD, HSELPLICD, HSELSDCD, HSELNoneD});
flopenr #(1) hselbridgedelayreg(HCLK, ~HRESETn, HREADY, HSELBRIDGE, HSELBRIDGED);
endmodule