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Add VexRiscv.

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colin 2022-02-25 11:56:36 +00:00
parent ccc993e003
commit 65545d5e03
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# Weekend group
我们不卷，只是爱好。
自由的参与方式
## 分歧决议

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# VexRiscV
## install special OpenOCD to support VexRiscV
```bash
https://github.com/SpinalHDL/openocd_riscv.git
sudo apt-get install libtool automake libusb-1.0.0-dev texinfo libusb-dev libyaml-dev pkg-config
./bootstrap
./configure --enable-ftdi --enable-dummy --enable-cmsis-dap --enable-remote-bitbang --enable-jtag_vpi --enable-ftdi --enable-jlink
make -j
sudo make install
```
## install sbt
```
# JAVA JDK 8
sudo add-apt-repository -y ppa:openjdk-r/ppa
sudo apt-get update
sudo apt-get install openjdk-8-jdk -y
sudo update-alternatives --config java
sudo update-alternatives --config javac
# Install SBT - https://www.scala-sbt.org/
echo "deb https://repo.scala-sbt.org/scalasbt/debian all main" | sudo tee /etc/apt/sources.list.d/sbt.list
echo "deb https://repo.scala-sbt.org/scalasbt/debian /" | sudo tee /etc/apt/sources.list.d/sbt_old.list
curl -sL "https://keyserver.ubuntu.com/pks/lookup?op=get&search=0x2EE0EA64E40A89B84B2DF73499E82A75642AC823" | sudo apt-key add
sudo apt-get update
sudo apt-get install sbt
```
## VexRiscv
```bash
# To generate the SoC without any content in the ram
sbt "runMain vexriscv.demo.Murax"
# To generate the SoC with a demo program already in ram
sbt "runMain vexriscv.demo.MuraxWithRamInit"
```

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obj_dir/
build/
logs/

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export CODE_BASE_PATH = ${PWD}/../../E906_RTL_FACTORY
GDB_PREFIX = /opt/riscv/bin/riscv32-unknown-elf-gdb
FILELIST = -F ./dpi/jtag.fl ../Murax.v
DEMODIR = ${PWD}
TEST = sim
# CFLAGS for verilator generated Makefiles. Without -std=c++11 it complains for `auto` variables
CFLAGS += "-std=c++11"
# Optimization for better performance; alternative is nothing for slower runtime (faster compiles)
# -O2 for faster runtime (slower compiles), or -O for balance.
VERILATOR_MAKE_FLAGS = OPT_FAST="-Os"
# Targets
all: clean verilator
clean:
rm -rf obj_dir
##################### Verilog Builds #####################################
verilator-build:
verilator --cc -CFLAGS ${CFLAGS} \
-Wno-UNOPTFLAT \
-Wno-STMTDLY \
-Wno-MULTIDRIVEN \
-Wno-CASEINCOMPLETE \
-Wno-COMBDLY \
-Wno-LATCH \
-Wno-WIDTH \
-Wno-IMPLICIT \
${FILELIST} \
soc_sim.v \
--trace \
--top-module soc_sim -exe test_soc_sim.cpp --autoflush
cp ${DEMODIR}/test_soc_sim.cpp obj_dir
$(MAKE) -j -C obj_dir/ -f Vsoc_sim.mk $(VERILATOR_MAKE_FLAGS)
##################### Simulation Runs #####################################
verilator: verilator-build
./obj_dir/Vsoc_sim
##################### openocd #####################################
openocd:
openocd -c "set MURAX_CPU0_YAML cpu0.yaml" -f murax.cfg
# openocd -f riscv.cfg
# openocd -f riscv.cfg -d3
gdb:
$(GDB_PREFIX) -x gdbinit ./hello_world.elf
help:
@echo Possible targets: verilator help clean all verilator-build program.hex
.PHONY: help clean verilator

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# jtag simulation
## start openocd
`openocd -d -f swerv.cfg`
## start gdb
`/opt/riscv/bin/riscv32-unknown-elf-gdb -ex "target extended-remote :3333"`
## quick start
At demo/jtag/
1. `make all`
2. `make openocd`
3. `make gdb`

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debug: !!vexriscv.DebugReport {hardwareBreakpointCount: 0}

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// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
#include "tcp_server.h"
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
/**
* Simple buffer for passing data between TCP sockets and DPI modules
*/
const int BUFSIZE_BYTE = 25600;
struct tcp_buf {
unsigned int rptr;
unsigned int wptr;
char buf[BUFSIZE_BYTE];
};
/**
* TCP Server thread context structure
*/
struct tcp_server_ctx {
// Writeable by the host thread
char *display_name;
uint16_t listen_port;
volatile bool socket_run;
// Writeable by the server thread
tcp_buf *buf_in;
tcp_buf *buf_out;
int sfd; // socket fd
int cfd; // client fd
pthread_t sock_thread;
};
static bool tcp_buffer_is_full(struct tcp_buf *buf) {
if (buf->wptr >= buf->rptr) {
return (buf->wptr - buf->rptr) == (BUFSIZE_BYTE - 1);
} else {
return (buf->rptr - buf->wptr) == 1;
}
}
static bool tcp_buffer_is_empty(struct tcp_buf *buf) {
return (buf->wptr == buf->rptr);
}
static void tcp_buffer_put_byte(struct tcp_buf *buf, char dat) {
bool done = false;
while (!done) {
if (!tcp_buffer_is_full(buf)) {
buf->buf[buf->wptr++] = dat;
buf->wptr %= BUFSIZE_BYTE;
done = true;
}
}
}
static bool tcp_buffer_get_byte(struct tcp_buf *buf, char *dat) {
if (tcp_buffer_is_empty(buf)) {
return false;
}
*dat = buf->buf[buf->rptr++];
buf->rptr %= BUFSIZE_BYTE;
return true;
}
static struct tcp_buf *tcp_buffer_new(void) {
struct tcp_buf *buf_new;
buf_new = (struct tcp_buf *)malloc(sizeof(struct tcp_buf));
buf_new->rptr = 0;
buf_new->wptr = 0;
return buf_new;
}
static void tcp_buffer_free(struct tcp_buf **buf) {
free(*buf);
*buf = NULL;
}
/**
* Start a TCP server
*
* This function creates attempts to create a new TCP socket instance. The
* socket is a non-blocking stream socket, with buffering disabled.
*
* @param ctx context object
* @return 0 on success, -1 in case of an error
*/
static int start(struct tcp_server_ctx *ctx) {
int rv;
assert(ctx->sfd == 0 && "Server already started.");
// create socket
int sfd = socket(AF_INET, SOCK_STREAM, 0);
if (sfd == -1) {
fprintf(stderr, "%s: Unable to create socket: %s (%d)\n", ctx->display_name,
strerror(errno), errno);
return -1;
}
rv = fcntl(sfd, F_SETFL, O_NONBLOCK);
if (rv != 0) {
fprintf(stderr, "%s: Unable to make socket non-blocking: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
return -1;
}
// reuse existing socket (if existing)
int reuse_socket = 1;
rv = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse_socket, sizeof(int));
if (rv != 0) {
fprintf(stderr, "%s: Unable to set socket options: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
return -1;
}
// stop tcp socket from buffering (buffering prevents timely responses to
// OpenOCD which severly limits debugging performance)
int tcp_nodelay = 1;
rv = setsockopt(sfd, IPPROTO_TCP, TCP_NODELAY, &tcp_nodelay, sizeof(int));
if (rv != 0) {
fprintf(stderr, "%s: Unable to set socket nodelay: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
return -1;
}
// bind server
struct sockaddr_in addr;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(ctx->listen_port);
rv = bind(sfd, (struct sockaddr *)&addr, sizeof(addr));
if (rv != 0) {
fprintf(stderr, "%s: Failed to bind socket: %s (%d)\n", ctx->display_name,
strerror(errno), errno);
return -1;
}
// listen for incoming connections
rv = listen(sfd, 1);
if (rv != 0) {
fprintf(stderr, "%s: Failed to listen on socket: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
return -1;
}
ctx->sfd = sfd;
assert(ctx->sfd > 0);
return 0;
}
/**
* Accept an incoming connection from a client (nonblocking)
*
* The resulting client fd is made non-blocking.
*
* @param ctx context object
* @return 0 on success, any other value indicates an error
*/
static int client_tryaccept(struct tcp_server_ctx *ctx) {
int rv;
assert(ctx->sfd > 0);
assert(ctx->cfd == 0);
int cfd = accept(ctx->sfd, NULL, NULL);
if (cfd == -1 && errno == EAGAIN) {
return -EAGAIN;
}
if (cfd == -1) {
fprintf(stderr, "%s: Unable to accept incoming connection: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
return -1;
}
rv = fcntl(cfd, F_SETFL, O_NONBLOCK);
if (rv != 0) {
fprintf(stderr, "%s: Unable to make client socket non-blocking: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
return -1;
}
ctx->cfd = cfd;
assert(ctx->cfd > 0);
printf("%s: Accepted client connection\n", ctx->display_name);
return 0;
}
/**
* Stop the TCP server
*
* @param ctx context object
*/
static void stop(struct tcp_server_ctx *ctx) {
assert(ctx);
if (!ctx->sfd) {
return;
}
close(ctx->sfd);
ctx->sfd = 0;
}
/**
* Receive a byte from a connected client
*
* @param ctx context object
* @param cmd byte received
* @return true if a byte was read
*/
static bool get_byte(struct tcp_server_ctx *ctx, char *cmd) {
assert(ctx);
ssize_t num_read = read(ctx->cfd, cmd, 1);
if (num_read == 0) {
return false;
}
if (num_read == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
return false;
} else if (errno == EBADF) {
// Possibly client went away? Accept a new connection.
fprintf(stderr, "%s: Client disappeared.\n", ctx->display_name);
tcp_server_client_close(ctx);
return false;
} else {
fprintf(stderr, "%s: Error while reading from client: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
assert(0 && "Error reading from client");
}
}
assert(num_read == 1);
return true;
}
/**
* Send a byte to a connected client
*
* @param ctx context object
* @param cmd byte to send
*/
static void put_byte(struct tcp_server_ctx *ctx, char cmd) {
while (1) {
ssize_t num_written = send(ctx->cfd, &cmd, sizeof(cmd), MSG_NOSIGNAL);
if (num_written == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
continue;
} else if (errno == EPIPE) {
printf("%s: Remote disconnected.\n", ctx->display_name);
tcp_server_client_close(ctx);
break;
} else {
fprintf(stderr, "%s: Error while writing to client: %s (%d)\n",
ctx->display_name, strerror(errno), errno);
assert(0 && "Error writing to client.");
}
}
if (num_written >= 1) {
break;
}
}
}
/**
* Cleanup server context
*
* @param ctx context object
*/
static void ctx_free(struct tcp_server_ctx *ctx) {
// Free the buffers
tcp_buffer_free(&ctx->buf_in);
tcp_buffer_free(&ctx->buf_out);
// Free the display name
free(ctx->display_name);
// Free the ctx
free(ctx);
ctx = NULL;
}
/**
* Thread function to create a new server instance
*
* @param ctx_void context object
* @return Always returns NULL
*/
static void *server_create(void *ctx_void) {
// Cast to a server struct
struct tcp_server_ctx *ctx = (struct tcp_server_ctx *)ctx_void;
struct timeval timeout;
// Start the server
int rv = start(ctx);
if (rv != 0) {
fprintf(stderr, "%s: Unable to create TCP server on port %d\n",
ctx->display_name, ctx->listen_port);
goto err_cleanup_return;
}
// Initialise timeout
timeout.tv_sec = 0;
// Initialise fd_set
// Start waiting for connection / data
char xfer_data;
while (ctx->socket_run) {
// Initialise structure of fds
fd_set read_fds;
FD_ZERO(&read_fds);
if (ctx->sfd) {
FD_SET(ctx->sfd, &read_fds);
}
if (ctx->cfd) {
FD_SET(ctx->cfd, &read_fds);
}
// max fd num
int mfd = (ctx->cfd > ctx->sfd) ? ctx->cfd : ctx->sfd;
// Set timeout - 50us gives good performance
timeout.tv_usec = 50;
// Wait for socket activity or timeout
rv = select(mfd + 1, &read_fds, NULL, NULL, &timeout);
if (rv < 0) {
printf("%s: Socket read failed, port: %d\n", ctx->display_name,
ctx->listen_port);
tcp_server_client_close(ctx);
}
// New connection
if (FD_ISSET(ctx->sfd, &read_fds)) {
client_tryaccept(ctx);
}
// New client data
if (FD_ISSET(ctx->cfd, &read_fds)) {
while (get_byte(ctx, &xfer_data)) {
tcp_buffer_put_byte(ctx->buf_in, xfer_data);
}
}
if (ctx->cfd != 0) {
while (tcp_buffer_get_byte(ctx->buf_out, &xfer_data)) {
put_byte(ctx, xfer_data);
}
}
}
err_cleanup_return:
// Simulation done - clean up
tcp_server_client_close(ctx);
stop(ctx);
return NULL;
}
// Abstract interface functions
tcp_server_ctx *tcp_server_create(const char *display_name, int listen_port) {
struct tcp_server_ctx *ctx =
(struct tcp_server_ctx *)calloc(1, sizeof(struct tcp_server_ctx));
assert(ctx);
// Create the buffers
struct tcp_buf *buf_in = tcp_buffer_new();
struct tcp_buf *buf_out = tcp_buffer_new();
assert(buf_in);
assert(buf_out);
// Populate the struct with buffer pointers
ctx->buf_in = buf_in;
ctx->buf_out = buf_out;
// Set up socket details
ctx->socket_run = true;
ctx->listen_port = listen_port;
ctx->display_name = strdup(display_name);
assert(ctx->display_name);
if (pthread_create(&ctx->sock_thread, NULL, server_create, (void *)ctx) !=
0) {
fprintf(stderr, "%s: Unable to create TCP socket thread\n",
ctx->display_name);
ctx_free(ctx);
free(ctx);
return NULL;
}
return ctx;
}
bool tcp_server_read(struct tcp_server_ctx *ctx, char *dat) {
return tcp_buffer_get_byte(ctx->buf_in, dat);
}
void tcp_server_write(struct tcp_server_ctx *ctx, char dat) {
tcp_buffer_put_byte(ctx->buf_out, dat);
}
void tcp_server_close(struct tcp_server_ctx *ctx) {
// Shut down the socket thread
ctx->socket_run = false;
pthread_join(ctx->sock_thread, NULL);
ctx_free(ctx);
}
void tcp_server_client_close(struct tcp_server_ctx *ctx) {
assert(ctx);
if (!ctx->cfd) {
return;
}
close(ctx->cfd);
ctx->cfd = 0;
}

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// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
/**
* Functions to create and interact with a threaded TCP server
*
* This is intended to be used by simulation add-on DPI modules to provide
* basic TCP socket communication between a host and simulated peripherals.
*/
#ifndef TCP_SERVER_H_
#define TCP_SERVER_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
struct tcp_server_ctx;
/**
* Non-blocking read of a byte from a connected client
*
* @param ctx tcp server context object
* @param dat byte received
* @return true if a byte was read
*/
bool tcp_server_read(struct tcp_server_ctx *ctx, char *dat);
/**
* Write a byte to a connected client
*
* The write is internally buffered and so does not block if the client is not
* ready to accept data, but does block if the buffer is full.
*
* @param ctx tcp server context object
* @param dat byte to send
*/
void tcp_server_write(struct tcp_server_ctx *ctx, char dat);
/**
* Create a new TCP server instance
*
* @param display_name C string description of server
* @param listen_port On which port the server should listen
* @return A pointer to the created context struct
*/
tcp_server_ctx *tcp_server_create(const char *display_name, int listen_port);
/**
* Shut down the server and free all reserved memory
*
* @param ctx tcp server context object
*/
void tcp_server_close(struct tcp_server_ctx *ctx);
/**
* Instruct the server to disconnect a client
*
* @param ctx tcp server context object
*/
void tcp_server_client_close(struct tcp_server_ctx *ctx);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // TCP_SERVER_H_

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+incdir+./common+
+incdir+./jtagdpi+
-CFLAGS -lpthread
-LDFLAGS -lpthread
./common/tcp_server.c
./jtagdpi/jtagdpi.sv
./jtagdpi/jtagdpi.c

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// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
#include "jtagdpi.h"
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include "../common/tcp_server.h"
struct jtagdpi_ctx {
// Server context
struct tcp_server_ctx *sock;
// Signals
uint8_t tck;
uint8_t tms;
uint8_t tdi;
uint8_t tdo;
uint8_t trst_n;
uint8_t srst_n;
};
/**
* Reset the JTAG signals to a "dongle unplugged" state
*/
static void reset_jtag_signals(struct jtagdpi_ctx *ctx) {
assert(ctx);
ctx->tck = 0;
ctx->tms = 0;
ctx->tdi = 0;
// trst_n is pulled down (reset active) by default
ctx->trst_n = 0;
// srst_n is pulled up (reset not active) by default
ctx->srst_n = 1;
}
/**
* Update the JTAG signals in the context structure
*/
static void update_jtag_signals(struct jtagdpi_ctx *ctx) {
assert(ctx);
/*
* Documentation pointer:
* The remote_bitbang protocol implemented below is documented in the OpenOCD
* source tree at doc/manual/jtag/drivers/remote_bitbang.txt, or online at
* https://repo.or.cz/openocd.git/blob/HEAD:/doc/manual/jtag/drivers/remote_bitbang.txt
*/
// read a command byte
char cmd;
if (!tcp_server_read(ctx->sock, &cmd)) {
return;
}
bool act_send_resp = false;
bool act_quit = false;
// // Use for debug jtag signal
// if ((((cmd - '0') >> 2) & 0x1) == 0x1 && (ctx->tck) == 0x0) {
// char tdo_ascii = ctx->tdo + '0';
// std::cout << "AAAAAA tms " << (int)(((cmd - '0') >> 1) & 0x1) << " tdi "
// << (int)(((cmd - '0') >> 0) & 0x1) << " tdo " << tdo_ascii
// << std::endl;
// }
// parse received command byte
if (cmd >= '0' && cmd <= '7') {
// JTAG write
char cmd_bit = cmd - '0';
ctx->tdi = (cmd_bit >> 0) & 0x1;
ctx->tms = (cmd_bit >> 1) & 0x1;
ctx->tck = (cmd_bit >> 2) & 0x1;
} else if (cmd >= 'r' && cmd <= 'u') {
// JTAG reset (active high from OpenOCD)
char cmd_bit = cmd - 'r';
ctx->srst_n = !((cmd_bit >> 0) & 0x1);
ctx->trst_n = !((cmd_bit >> 1) & 0x1);
} else if (cmd == 'R') {
// JTAG read
act_send_resp = true;
} else if (cmd == 'B') {
// printf("%s: BLINK ON!\n", ctx->display_name);
} else if (cmd == 'b') {
// printf("%s: BLINK OFF!\n", ctx->display_name);
} else if (cmd == 'Q') {
// quit (client disconnect)
act_quit = true;
} else {
fprintf(stderr,
"JTAG DPI Protocol violation detected: unsupported command %c\n",
cmd);
exit(1);
}
// send tdo as response
if (act_send_resp) {
char tdo_ascii = ctx->tdo + '0';
tcp_server_write(ctx->sock, tdo_ascii);
}
if (act_quit) {
printf("JTAG DPI: Remote disconnected.\n");
tcp_server_client_close(ctx->sock);
}
}
void *jtagdpi_create(const char *display_name, int listen_port) {
struct jtagdpi_ctx *ctx =
(struct jtagdpi_ctx *)calloc(1, sizeof(struct jtagdpi_ctx));
assert(ctx);
// Create socket
ctx->sock = tcp_server_create(display_name, listen_port);
reset_jtag_signals(ctx);
printf(
"\n"
"JTAG: Virtual JTAG interface %s is listening on port %d. Use\n"
"OpenOCD and the following configuration to connect:\n"
" interface remote_bitbang\n"
" remote_bitbang_host localhost\n"
" remote_bitbang_port %d\n",
display_name, listen_port, listen_port);
return (void *)ctx;
}
void jtagdpi_close(void *ctx_void) {
struct jtagdpi_ctx *ctx = (struct jtagdpi_ctx *)ctx_void;
if (!ctx) {
return;
}
tcp_server_close(ctx->sock);
free(ctx);
}
void jtagdpi_tick(void *ctx_void, svBit *tck, svBit *tms, svBit *tdi,
svBit *trst_n, svBit *srst_n, const svBit tdo) {
struct jtagdpi_ctx *ctx = (struct jtagdpi_ctx *)ctx_void;
ctx->tdo = tdo;
// TODO: Evaluate moving this functionality into a separate thread
if (ctx) {
update_jtag_signals(ctx);
}
*tdi = ctx->tdi;
*tms = ctx->tms;
*tck = ctx->tck;
*srst_n = ctx->srst_n;
*trst_n = ctx->trst_n;
}

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// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
#ifndef JTAGDPI_H_
#define JTAGDPI_H_
#include <svdpi.h>
#ifdef __cplusplus
extern "C" {
#endif
struct jtagdpi_ctx;
/**
* Constructor: Create and initialize jtagdpi context object
*
* Call from a initial block.
*
* @param display_name Name of the JTAG interface (for display purposes only)
* @param listen_port Port to listen on
* @return an initialized struct jtagdpi_ctx context object
*/
void *jtagdpi_create(const char *display_name, int listen_port);
/**
* Destructor: Close all connections and free all resources
*
* Call from a finish block.
*
* @param ctx_void a struct jtagdpi_ctx context object
*/
void jtagdpi_close(void *ctx_void);
/**
* Drive JTAG signals
*
* Call this function from the simulation at every clock tick to read/write
* from/to the JTAG signals.
*
* @param ctx_void a struct jtagdpi_ctx context object
* @param tck JTAG test clock signal
* @param tms JTAG test mode select signal
* @param tdi JTAG test data input signal
* @param trst_n JTAG test reset signal (active low)
* @param srst_n JTAG system reset signal (active low)
* @param tdo JTAG test data out
*/
void jtagdpi_tick(void *ctx_void, svBit *tck, svBit *tms, svBit *tdi,
svBit *trst_n, svBit *srst_n, const svBit tdo);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // JTAGDPI_H_

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// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
`timescale 1ns / 1ps
module jtagdpi #(
parameter string Name = "jtag0", // name of the JTAG interface (display only)
parameter int ListenPort = 44853 // TCP port to listen on
) (
input logic clk_i,
input logic rst_ni,
output logic jtag_tck,
output logic jtag_tms,
output logic jtag_tdi,
input logic jtag_tdo,
output logic jtag_trst_n,
output logic jtag_srst_n
);
import "DPI-C" function chandle jtagdpi_create(
input string name,
input int listen_port
);
import "DPI-C" function void jtagdpi_tick(
input chandle ctx,
output bit tck,
output bit tms,
output bit tdi,
output bit trst_n,
output bit srst_n,
input bit tdo
);
reg [1:0] plit;
import "DPI-C" function void jtagdpi_close(input chandle ctx);
chandle ctx;
initial begin
ctx = jtagdpi_create(Name, ListenPort);
end
final begin
jtagdpi_close(ctx);
ctx = 0;
end
always_ff @(posedge clk_i) plit <= plit + 1'b1;
always_ff @(posedge plit[1], negedge rst_ni) begin
jtagdpi_tick(ctx, jtag_tck, jtag_tms, jtag_tdi, jtag_trst_n, jtag_srst_n,
jtag_tdo);
end
endmodule

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target remote :3333
set remotetimeout 20000

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VexRiscv/sim/hello_world.elf Executable file
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adapter driver remote_bitbang
remote_bitbang host localhost
remote_bitbang port 44853
set _ENDIAN little
set _TAP_TYPE 1234
if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
# set useful default
set _CPUTAPID 0x10001fff
}
adapter speed 800
adapter srst delay 260
jtag_ntrst_delay 250
set _CHIPNAME fpga_spinal
jtag newtap $_CHIPNAME bridge -expected-id $_CPUTAPID -irlen 4 -ircapture 0x1 -irmask 0xF
target create $_CHIPNAME.cpu0 vexriscv -endian $_ENDIAN -chain-position $_CHIPNAME.bridge -coreid 0 -dbgbase 0xF00F0000
vexriscv readWaitCycles 12
vexriscv cpuConfigFile $MURAX_CPU0_YAML
poll_period 50
init
#echo "Halting processor"
soft_reset_halt
sleep 1000

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# "JTAG adapter" for simulation, exposed to OpenOCD through a TCP socket
# speaking the remote_bitbang protocol. The adapter is implemented as
# SystemVerilog DPI module.
# reset_config srst_only # donot support TRST, use five tms=1
# adapter_nsrst_assert_width 100
adapter driver remote_bitbang
remote_bitbang host localhost
remote_bitbang port 44853
# Target configuration for the riscv chip
set _CHIPNAME riscv
set _TARGETNAME $_CHIPNAME.tap
jtag newtap $_CHIPNAME tap -irlen 5 -expected-id 0x10001fff
target create $_TARGETNAME riscv -chain-position $_TARGETNAME
# Configure work area in on-chip SRAM
# $_TARGETNAME configure -work-area-phys 0x1000e000 -work-area-size 1000 -work-area-backup 0
riscv expose_csrs 1988
# Be verbose about GDB errors
gdb_report_data_abort enable
gdb_report_register_access_error enable
# Increase timeouts in simulation
riscv set_command_timeout_sec 1200
# Conclude OpenOCD configuration
init
# Halt the target
halt

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2020 Western Digital Corporation or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// `define E906
// // `define SOC_TOP tb.x_soc
// // `define RTL_MEM tb.x_soc.x_smem_ctrl
// // `define ISA_MEM tb.x_pa_isa
// `define JTAG_5
// `define IAHB_LITE
// `define RTL_IAHBL_MEM soc_sim.rvsoc.x_cpu_sub_system_ahb.x_iahb_mem_ctrl
// `define DAHB_LITE
// `define RTL_DAHBL_MEM soc_sim.rvsoc.x_cpu_sub_system_ahb.x_dahb_mem_ctrl
// `define CLK_PERIOD 10
// `define TCLK_PERIOD 33
// `define MAX_RUN_TIME 700000000
// `define clk tb.clk
// `define rst_b tb.rst_b
// `include "../cpu/environment.h"
`timescale 1ns / 1ps
module soc_sim (
input bit clk,
output jtag_tdo,
output jtag_tck,
output jtag_tms,
output jtag_tdi
);
wire rst;
bit [63:0] cycleCnt;
reg uart_tx;
wire uart_rx;
wire [ 7:0] gpioa;
wire jrst_b;
wire nrst_b;
wire [ 7:0] WriteData;
parameter MAX_CYCLES = 10_000_000_0;
assign rst = cycleCnt > 30 || cycleCnt < 10;
assign jrst_b = cycleCnt > 30 || cycleCnt < 10; // Very important
assign nrst_b = cycleCnt > 30 || cycleCnt < 10;
// ///////////////////////////////////////
// // Memory Initialization
// ///////////////////////////////////////
// integer i;
// // reg [31:0] mem_data_size;
// // reg [31:0] mem_inst_size;
// reg [31:0] mem_inst_temp[65536];
// // reg [31:0] mem_data_temp[65536];
// initial begin
// $display("\t******START TO LOAD PROGRAM******\n");
// $readmemh("../work/case.pat", mem_inst_temp);
// // $readmemh("./data.pat", mem_data_temp);
// for (i = 0; i < 65536; i = i + 1) begin
// `RTL_IAHBL_MEM.ram0.mem[i][7:0] = ((^mem_inst_temp[i][31:24]) === 1'bx ) ? 8'b0:mem_inst_temp[i][31:24];
// `RTL_IAHBL_MEM.ram1.mem[i][7:0] = ((^mem_inst_temp[i][23:16]) === 1'bx ) ? 8'b0:mem_inst_temp[i][23:16];
// `RTL_IAHBL_MEM.ram2.mem[i][7:0] = ((^mem_inst_temp[i][15: 8]) === 1'bx ) ? 8'b0:mem_inst_temp[i][15: 8];
// `RTL_IAHBL_MEM.ram3.mem[i][7:0] = ((^mem_inst_temp[i][ 7: 0]) === 1'bx ) ? 8'b0:mem_inst_temp[i][ 7: 0];
// end
// for (i = 0; i <= 65536; i = i + 1) begin
// `RTL_DAHBL_MEM.ram0.mem[i][7:0] = 8'b0;
// `RTL_DAHBL_MEM.ram1.mem[i][7:0] = 8'b0;
// `RTL_DAHBL_MEM.ram2.mem[i][7:0] = 8'b0;
// `RTL_DAHBL_MEM.ram3.mem[i][7:0] = 8'b0;
// end
// for (i = 0; i <= 65536; i = i + 1) begin
// `RTL_DAHBL_MEM.ram4.mem[i][7:0] = 8'b0;
// `RTL_DAHBL_MEM.ram5.mem[i][7:0] = 8'b0;
// `RTL_DAHBL_MEM.ram6.mem[i][7:0] = 8'b0;
// `RTL_DAHBL_MEM.ram7.mem[i][7:0] = 8'b0;
// end
// end
integer fd;
always @(posedge clk) begin
cycleCnt <= cycleCnt + 1;
if (cycleCnt == MAX_CYCLES) begin
$display("Hit max cycle count (%0d) .. stopping", cycleCnt);
$finish;
end
if (WriteData[7:0] == 8'hff) begin
$display("\nFinished by program");
$display("TEST_PASSED");
$finish;
end else if (WriteData[7:0] == 8'h1) begin
$display("TEST_FAILED");
$finish;
end else begin
$fwrite(fd, "%c", WriteData[7:0]);
$write("%c", WriteData[7:0]);
end
end
initial begin
fd = $fopen("console.log", "w");
end
Murax rvsoc (
.io_asyncReset(rst),
.io_mainClk(clk),
.io_jtag_tms(jtag_tms),
.io_jtag_tdi(jtag_tdi),
.io_jtag_tdo(jtag_tdo),
.io_jtag_tck(jtag_tck),
.io_gpioA_read(),
.io_gpioA_write(),
.io_gpioA_writeEnable(),
.io_uart_txd(uart_rx),
.io_uart_rxd(uart_tx)
);
jtagdpi jtagdpi (
.clk_i (clk),
.rst_ni(rst),
.jtag_tck(jtag_tck),
.jtag_tms(jtag_tms),
.jtag_tdi(jtag_tdi),
.jtag_tdo(jtag_tdo),
.jtag_trst_n(),
.jtag_srst_n()
);
endmodule

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2019 Western Digital Corporation or its affiliates.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include <stdlib.h>
#include <iostream>
#include <string>
#include <utility>
#include "Vsoc_sim.h"
#include "verilated.h"
#include "verilated_vcd_c.h"
vluint64_t main_time = 0;
const int isOpenDump = 0;
double sc_time_stamp() { return main_time; }
int main(int argc, char** argv) {
std::cout << "\nVerilatorTB: Start of sim\n" << std::endl;
Verilated::commandArgs(argc, argv);
Vsoc_sim* soc = new Vsoc_sim;
VerilatedVcdC* tfp = new VerilatedVcdC;
if (isOpenDump) {
Verilated::traceEverOn(true);
soc->trace(tfp, 99);
tfp->open("vlt_dump.vcd");
}
while (!Verilated::gotFinish()) {
main_time += 5;
soc->clk = !soc->clk;
soc->eval();
if (isOpenDump) {
tfp->dump(main_time);
}
}
if (isOpenDump) {
tfp->close();
}
soc->final();
std::cout << "\nVerilatorTB: End of sim" << std::endl;
exit(EXIT_SUCCESS);
}