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openocd/src/jtag/drivers/vdebug.c

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/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) */
/*----------------------------------------------------------------------------
* Copyright 2020-2021 Cadence Design Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*----------------------------------------------------------------------------
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*----------------------------------------------------------------------------
*/
/*!
* @file
*
* @brief the virtual debug interface provides a connection between a sw debugger
* and the simulated, emulated core over a soft connection, implemented by DPI
* The vdebug debug driver currently supports JTAG transport
* TODO: implement support and test big endian platforms
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* close */
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#endif
#include <stdio.h>
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include "jtag/interface.h"
#include "jtag/commands.h"
#include "transport/transport.h"
#include "helper/time_support.h"
#include "helper/replacements.h"
#include "helper/log.h"
#define VD_VERSION 43
#define VD_BUFFER_LEN 4024
#define VD_CHEADER_LEN 24
#define VD_SHEADER_LEN 16
#define VD_MAX_MEMORIES 4
#define VD_POLL_INTERVAL 500
#define VD_SCALE_PSTOMS 1000000000
/**
* @brief List of transactor types
*/
enum {
VD_BFM_JTDP = 0x0001, /* transactor DAP JTAG DP */
VD_BFM_SWDP = 0x0002, /* transactor DAP SWD DP */
VD_BFM_AHB = 0x0003, /* transactor AMBA AHB */
VD_BFM_APB = 0x0004, /* transactor AMBA APB */
VD_BFM_AXI = 0x0005, /* transactor AMBA AXI */
VD_BFM_JTAG = 0x0006, /* transactor serial JTAG */
VD_BFM_SWD = 0x0007, /* transactor serial SWD */
};
/**
* @brief List of signals that can be read or written by the debugger
*/
enum {
VD_SIG_TCK = 0x0001, /* JTAG clock; tclk */
VD_SIG_TDI = 0x0002, /* JTAG TDI; tdi */
VD_SIG_TMS = 0x0004, /* JTAG TMS; tms */
VD_SIG_RESET = 0x0008, /* DUT reset; rst */
VD_SIG_TRST = 0x0010, /* JTAG Reset; trstn */
VD_SIG_TDO = 0x0020, /* JTAG TDO; tdo */
VD_SIG_POWER = 0x0100, /* BFM power; bfm_up */
VD_SIG_TCKDIV = 0x0200, /* JTAG clock divider; tclkdiv */
VD_SIG_BUF = 0x1000, /* memory buffer; mem */
};
/**
* @brief List of errors
*/
enum {
VD_ERR_NONE = 0x0000, /* no error */
VD_ERR_NOT_IMPL = 0x0100, /* feature not implemented */
VD_ERR_USAGE = 0x0101, /* incorrect usage */
VD_ERR_PARAM = 0x0102, /* incorrect parameter */
VD_ERR_CONFIG = 0x0107, /* incorrect configuration */
VD_ERR_NO_MEMORY = 0x0104, /* out of memory */
VD_ERR_SHM_OPEN = 0x010a, /* cannot open shared memory */
VD_ERR_SHM_MAP = 0x010b, /* cannot map shared memory */
VD_ERR_SOC_OPEN = 0x011a, /* cannot open socket */
VD_ERR_SOC_OPT = 0x011b, /* cannot set socket option */
VD_ERR_SOC_ADDR = 0x011c, /* cannot resolve host address */
VD_ERR_SOC_CONN = 0x011d, /* cannot connect to host */
VD_ERR_SOC_SEND = 0x011e, /* error sending data on socket */
VD_ERR_SOC_RECV = 0x011f, /* error receiving data from socket */
VD_ERR_LOCKED = 0x0202, /* device locked */
VD_ERR_NOT_RUN = 0x0204, /* transactor not running */
VD_ERR_NOT_OPEN = 0x0205, /* transactor not open/connected */
VD_ERR_LICENSE = 0x0206, /* cannot check out the license */
VD_ERR_VERSION = 0x0207, /* transactor version mismatch */
VD_ERR_TIME_OUT = 0x0301, /* time out, waiting */
VD_ERR_NO_POWER = 0x0302, /* power out error */
VD_ERR_BUS_ERROR = 0x0304, /* bus protocol error, like pslverr */
VD_ERR_NO_ACCESS = 0x0306, /* no access to an object */
VD_ERR_INV_HANDLE = 0x0307, /* invalid object handle */
VD_ERR_INV_SCOPE = 0x0308, /* invalid scope */
};
enum {
VD_CMD_OPEN = 0x01,
VD_CMD_CLOSE = 0x02,
VD_CMD_CONNECT = 0x04,
VD_CMD_DISCONNECT = 0x05,
VD_CMD_WAIT = 0x09,
VD_CMD_SIGSET = 0x0a,
VD_CMD_SIGGET = 0x0b,
VD_CMD_JTAGCLOCK = 0x0f,
VD_CMD_JTAGSHTAP = 0x1a,
VD_CMD_MEMOPEN = 0x21,
VD_CMD_MEMCLOSE = 0x22,
VD_CMD_MEMWRITE = 0x23,
};
enum {
VD_BATCH_NO = 0,
VD_BATCH_WO = 1,
VD_BATCH_WR = 2,
};
struct vd_shm {
struct { /* VD_CHEADER_LEN written by client */
uint8_t cmd; /* 000; command */
uint8_t type; /* 001; interface type */
uint16_t waddr; /* 002; write pointer */
uint16_t wbytes; /* 004; data bytes */
uint16_t rbytes; /* 006; data bytes to read */
uint16_t wwords; /* 008; data words */
uint16_t rwords; /* 00a; data words to read */
uint32_t rwdata; /* 00c; read/write data */
uint32_t offset; /* 010; address offset */
uint16_t offseth; /* 014; address offset 47:32 */
uint16_t wid; /* 016; request id*/
};
union { /* 018; */
uint8_t wd8[VD_BUFFER_LEN];
uint16_t wd16[VD_BUFFER_LEN / 2];
uint32_t wd32[VD_BUFFER_LEN / 4];
uint64_t wd64[VD_BUFFER_LEN / 8];
};
struct { /* VD_SHEADER_LEN written by server */
uint16_t rid; /* fd0: request id read */
uint16_t awords; /* fd2: actual data words read back */
int32_t status; /* fd4; */
uint64_t duttime; /* fd8; */
};
union { /* fe0: */
uint8_t rd8[VD_BUFFER_LEN];
uint16_t rd16[VD_BUFFER_LEN / 2];
uint32_t rd32[VD_BUFFER_LEN / 4];
uint64_t rd64[VD_BUFFER_LEN / 8];
};
uint32_t state; /* 1f98; connection state */
uint32_t count; /* 1f9c; */
uint8_t dummy[96]; /* 1fa0; 48+40B+8B; */
};
struct vd_client {
uint8_t trans_batch;
bool trans_first;
bool trans_last;
uint8_t mem_ndx;
uint8_t buf_width;
uint8_t addr_bits;
uint8_t bfm_type;
uint16_t sig_read;
uint16_t sig_write;
uint32_t bfm_period;
uint32_t mem_base[VD_MAX_MEMORIES];
uint32_t mem_size[VD_MAX_MEMORIES];
uint32_t mem_width[VD_MAX_MEMORIES];
uint32_t mem_depth[VD_MAX_MEMORIES];
uint16_t server_port;
uint32_t poll_cycles;
uint32_t poll_min;
uint32_t poll_max;
uint32_t targ_time;
int hsocket;
char server_name[32];
char bfm_path[128];
char mem_path[VD_MAX_MEMORIES][128];
uint8_t *tdo;
};
struct vd_jtag_hdr {
uint64_t tlen:24;
uint64_t post:3;
uint64_t pre:3;
uint64_t cmd:2;
uint64_t wlen:16;
uint64_t rlen:16;
};
static struct vd_shm *pbuf;
static struct vd_client vdc;
static int vdebug_socket_error(void)
{
#ifdef _WIN32
return WSAGetLastError();
#else
return errno;
#endif
}
static int vdebug_socket_open(char *server_addr, uint32_t port)
{
int hsock;
int rc = 0;
uint32_t buflen = sizeof(struct vd_shm); /* size of the send and rcv buffer */
struct addrinfo *ainfo = NULL;
struct addrinfo ahint = { 0, AF_INET, SOCK_STREAM, 0, 0, NULL, NULL, NULL };
#ifdef _WIN32
hsock = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (hsock == INVALID_SOCKET)
rc = vdebug_socket_error();
#else
uint32_t rcvwat = VD_SHEADER_LEN; /* size of the rcv header, as rcv min watermark */
hsock = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (hsock < 0)
rc = errno;
else if (setsockopt(hsock, SOL_SOCKET, SO_RCVLOWAT, &rcvwat, sizeof(rcvwat)) < 0)
rc = errno;
#endif
else if (setsockopt(hsock, SOL_SOCKET, SO_SNDBUF, (const char *)&buflen, sizeof(buflen)) < 0)
rc = vdebug_socket_error();
else if (setsockopt(hsock, SOL_SOCKET, SO_RCVBUF, (const char *)&buflen, sizeof(buflen)) < 0)
rc = vdebug_socket_error();
if (rc) {
LOG_ERROR("socket_open: cannot set socket option, error %d", rc);
} else if (getaddrinfo(server_addr, NULL, &ahint, &ainfo) != 0) {
LOG_ERROR("socket_open: cannot resolve address %s, error %d", server_addr, vdebug_socket_error());
rc = VD_ERR_SOC_ADDR;
} else {
((struct sockaddr_in *)(ainfo->ai_addr))->sin_port = htons(port);
if (connect(hsock, ainfo->ai_addr, sizeof(struct sockaddr)) < 0) {
LOG_ERROR("socket_open: cannot connect to %s:%d, error %d", server_addr, port, vdebug_socket_error());
rc = VD_ERR_SOC_CONN;
}
}
if (rc) {
close_socket(hsock);
hsock = 0;
}
if (ainfo)
freeaddrinfo(ainfo);
return hsock;
}
static int vdebug_socket_receive(int hsock, struct vd_shm *pmem)
{
int rc;
int dreceived = 0;
int offset = (uint8_t *)&pmem->rid - &pmem->cmd;
int to_receive = VD_SHEADER_LEN + pmem->rbytes;
char *pb = (char *)pmem;
do {
rc = recv(hsock, pb + offset, to_receive, 0);
if (rc <= 0) {
LOG_WARNING("socket_receive: recv failed, error %d", rc < 0 ? vdebug_socket_error() : 0);
return rc;
}
to_receive -= rc;
offset += rc;
LOG_DEBUG_IO("socket_receive: received %d, to receive %d", rc, to_receive);
dreceived += rc;
} while (to_receive);
return dreceived;
}
static int vdebug_socket_send(int hsock, struct vd_shm *pmem)
{
int rc = send(hsock, (const char *)&pmem->cmd, VD_CHEADER_LEN + pmem->wbytes, 0);
if (rc <= 0)
LOG_WARNING("socket_send: send failed, error %d", vdebug_socket_error());
else
LOG_DEBUG_IO("socket_send: sent %d, to send 0", rc);
return rc;
}
static uint32_t vdebug_wait_server(int hsock, struct vd_shm *pmem)
{
if (!hsock)
return VD_ERR_SOC_OPEN;
int st = vdebug_socket_send(hsock, pmem);
if (st <= 0)
return VD_ERR_SOC_SEND;
int rd = vdebug_socket_receive(hsock, pmem);
if (rd <= 0)
return VD_ERR_SOC_RECV;
int rc = pmem->status;
LOG_DEBUG_IO("wait_server: cmd %02" PRIx8 " done, sent %d, rcvd %d, status %d",
pmem->cmd, st, rd, rc);
return rc;
}
int vdebug_run_jtag_queue(int hsock, struct vd_shm *pm, unsigned int count)
{
uint8_t num_pre, num_post, tdi, tms;
unsigned int num, anum, bytes, hwords, words;
unsigned int req, waddr, rwords;
int64_t ts, te;
uint8_t *tdo;
int rc;
struct vd_jtag_hdr *hdr;
req = 0; /* beginning of request */
waddr = 0;
rwords = 0;
pm->wbytes = pm->wwords * vdc.buf_width;
pm->rbytes = pm->rwords * vdc.buf_width;
ts = timeval_ms();
rc = vdebug_wait_server(hsock, pm);
while (!rc && (req < count)) { /* loop over requests to read data and print out */
hdr = (struct vd_jtag_hdr *)&pm->wd8[waddr * 4];
hwords = hdr->wlen;
words = hdr->rlen;
anum = hdr->tlen;
num_pre = hdr->pre;
num_post = hdr->post;
if (num_post)
num = anum - num_pre - num_post + 1;
else
num = anum - num_pre;
bytes = (num + 7) / 8;
vdc.trans_last = (req + 1) < count ? 0 : 1;
vdc.trans_first = waddr ? 0 : 1;
if (hdr->cmd == 3) { /* read */
tdo = vdc.tdo;
for (unsigned int j = 0; j < bytes; j++) {
tdo[j] = (pm->rd8[rwords * 8 + j] >> num_pre) | (pm->rd8[rwords * 8 + j + 1] << (8 - num_pre));
LOG_DEBUG_IO("%04x D0[%02x]:%02x", pm->wid - count + req, j, tdo[j]);
}
rwords += words; /* read data offset */
} else {
tdo = NULL;
}
waddr += sizeof(struct vd_jtag_hdr) / 4; /* waddr past header */
tdi = (pm->wd8[waddr * 4] >> num_pre) | (pm->wd8[waddr * 4 + 1] << (8 - num_pre));
tms = (pm->wd8[waddr * 4 + 4] >> num_pre) | (pm->wd8[waddr * 4 + 4 + 1] << (8 - num_pre));
LOG_DEBUG("%04x L:%02d O:%05x @%03x DI:%02x MS:%02x DO:%02x",
pm->wid - count + req, num, (vdc.trans_first << 14) | (vdc.trans_last << 15),
waddr - 2, tdi, tms, (tdo ? tdo[0] : 0xdd));
waddr += hwords * 2; /* start of next request */
req += 1;
}
if (rc) {
LOG_ERROR("0x%x executing transaction", rc);
rc = ERROR_FAIL;
}
te = timeval_ms();
vdc.targ_time += (uint32_t)(te - ts);
pm->offseth = 0; /* reset buffer write address */
pm->offset = 0;
pm->rwords = 0;
pm->waddr = 0;
return rc;
}
static int vdebug_open(int hsock, struct vd_shm *pm, const char *path,
uint8_t type, uint32_t period_ps, uint32_t sig_mask)
{
int rc = VD_ERR_NOT_OPEN;
pm->cmd = VD_CMD_OPEN;
pm->wid = VD_VERSION; /* client version */
pm->wbytes = 0;
pm->rbytes = 0;
pm->wwords = 0;
pm->rwords = 0;
rc = vdebug_wait_server(hsock, pm);
if (rc != 0) { /* communication problem */
LOG_ERROR("0x%x connecting to server", rc);
} else if (pm->rid < pm->wid) {
LOG_ERROR("server version %d too old for the client %d", pm->rid, pm->wid);
pm->cmd = VD_CMD_CLOSE; /* let server close the connection */
vdebug_wait_server(hsock, pm);
rc = VD_ERR_VERSION;
} else {
pm->cmd = VD_CMD_CONNECT;
pm->type = type; /* BFM type to connect to, here JTAG */
pm->rwdata = sig_mask | VD_SIG_BUF | (VD_SIG_BUF << 16);
pm->wbytes = strlen(path) + 1;
pm->rbytes = 12;
pm->wid = 0; /* reset wid for transaction ID */
pm->wwords = 0;
pm->rwords = 0;
memcpy(pm->wd8, path, pm->wbytes + 1);
rc = vdebug_wait_server(hsock, pm);
vdc.sig_read = pm->rwdata >> 16; /* signal read mask */
vdc.sig_write = pm->rwdata; /* signal write mask */
vdc.bfm_period = period_ps;
vdc.buf_width = pm->rd32[0] / 8;/* access width in bytes */
vdc.addr_bits = pm->rd32[2]; /* supported address bits */
}
if (rc) {
LOG_ERROR("0x%x connecting to BFM %s", rc, path);
return ERROR_FAIL;
}
LOG_DEBUG("%s type %0x, period %dps, buffer %dx%dB signals r%04xw%04x",
path, type, vdc.bfm_period, VD_BUFFER_LEN / vdc.buf_width,
vdc.buf_width, vdc.sig_read, vdc.sig_write);
return ERROR_OK;
}
static int vdebug_close(int hsock, struct vd_shm *pm, uint8_t type)
{
pm->cmd = VD_CMD_DISCONNECT;
pm->type = type; /* BFM type, here JTAG */
pm->wbytes = 0;
pm->rbytes = 0;
pm->wwords = 0;
pm->rwords = 0;
vdebug_wait_server(hsock, pm);
pm->cmd = VD_CMD_CLOSE;
pm->wid = VD_VERSION; /* client version */
pm->wbytes = 0;
pm->rbytes = 0;
pm->wwords = 0;
pm->rwords = 0;
vdebug_wait_server(hsock, pm);
LOG_DEBUG("type %0x", type);
return ERROR_OK;
}
static int vdebug_wait(int hsock, struct vd_shm *pm, uint32_t cycles)
{
if (cycles) {
pm->cmd = VD_CMD_WAIT;
pm->wbytes = 0;
pm->rbytes = 0;
pm->rwdata = cycles; /* clock sycles to wait */
int rc = vdebug_wait_server(hsock, pm);
if (rc) {
LOG_ERROR("0x%x waiting %" PRIx32 " cycles", rc, cycles);
return ERROR_FAIL;
}
LOG_DEBUG("%d cycles", cycles);
}
return ERROR_OK;
}
static int vdebug_sig_set(int hsock, struct vd_shm *pm, uint32_t write_mask, uint32_t value)
{
pm->cmd = VD_CMD_SIGSET;
pm->wbytes = 0;
pm->rbytes = 0;
pm->rwdata = (write_mask << 16) | (value & 0xffff); /* mask and value of signals to set */
int rc = vdebug_wait_server(hsock, pm);
if (rc) {
LOG_ERROR("0x%x setting signals %04" PRIx32, rc, write_mask);
return ERROR_FAIL;
}
LOG_DEBUG("setting signals %04" PRIx32 " to %04" PRIx32, write_mask, value);
return ERROR_OK;
}
static int vdebug_jtag_clock(int hsock, struct vd_shm *pm, uint32_t value)
{
pm->cmd = VD_CMD_JTAGCLOCK;
pm->wbytes = 0;
pm->rbytes = 0;
pm->rwdata = value; /* divider value */
int rc = vdebug_wait_server(hsock, pm);
if (rc) {
LOG_ERROR("0x%x setting jtag_clock", rc);
return ERROR_FAIL;
}
LOG_DEBUG("setting jtag clock divider to %" PRIx32, value);
return ERROR_OK;
}
static int vdebug_jtag_shift_tap(int hsock, struct vd_shm *pm, uint8_t num_pre,
const uint8_t tms_pre, uint32_t num, const uint8_t *tdi,
uint8_t num_post, const uint8_t tms_post, uint8_t *tdo,
uint8_t f_last)
{
const uint32_t tobits = 8;
uint16_t bytes, hwords, anum, words, waddr;
int rc = 0;
pm->cmd = VD_CMD_JTAGSHTAP;
vdc.trans_last = f_last || (vdc.trans_batch == VD_BATCH_NO) || tdo;
if (vdc.trans_first)
waddr = 0; /* reset buffer offset */
else
waddr = pm->offseth; /* continue from the previous transaction */
if (num_post) /* actual number of bits to shift */
anum = num + num_pre + num_post - 1;
else
anum = num + num_pre;
hwords = (anum + 4 * vdc.buf_width - 1) / (4 * vdc.buf_width); /* in 4B TDI/TMS words */
words = (hwords + 1) / 2; /* in 8B TDO words to read */
bytes = (num + 7) / 8; /* data only portion in bytes */
/* buffer overflow check and flush */
if (4 * waddr + sizeof(struct vd_jtag_hdr) + 8 * hwords + 64 > VD_BUFFER_LEN) {
vdc.trans_last = 1; /* force flush within 64B of buffer end */
} else if (4 * waddr + sizeof(struct vd_jtag_hdr) + 8 * hwords > VD_BUFFER_LEN) {
/* this req does not fit, discard it */
LOG_ERROR("%04x L:%02d O:%05x @%04x too many bits to shift",
pm->wid, anum, (vdc.trans_first << 14) | (vdc.trans_last << 15), waddr);
rc = ERROR_FAIL;
}
if (!rc && anum) {
uint16_t i, j;
struct vd_jtag_hdr *hdr = (struct vd_jtag_hdr *)&pm->wd8[4 * waddr]; /* 8 bytes header */
hdr->cmd = (tdo ? 3 : 1); /* R and W bits */
hdr->pre = num_pre;
hdr->post = num_post;
hdr->tlen = anum;
hdr->wlen = hwords;
hdr->rlen = words;
pm->wid++; /* transaction ID */
waddr += 2; /* waddr past header */
/* TDI/TMS data follows as 32 bit word pairs {TMS,TDI} */
pm->wd8[4 * waddr] = (tdi ? (tdi[0] << num_pre) : 0);
pm->wd8[4 * waddr + 4] = tms_pre; /* init with tms_pre */
if (num + num_pre <= 8) /* and tms_post for num <=4 */
pm->wd8[4 * waddr + 4] |= (tms_post << (num + num_pre - 1));
for (i = 1, j = 4 * waddr; i < bytes; i++) {
if (i == bytes - 1 && num + num_pre <= bytes * tobits)
pm->wd8[j + i + 4] = tms_post << ((num + num_pre - 1) % 8);
else
pm->wd8[j + i + 4] = 0x0;/* placing 4 bytes of TMS bits into high word */
if (!tdi) /* placing 4 bytes of TDI bits into low word */
pm->wd8[j + i] = 0x0;
else
pm->wd8[j + i] = (tdi[i] << num_pre) | (tdi[i - 1] >> (8 - num_pre));
if (i % 4 == 3)
j += 4;
}
if (tdi)
if (num + num_pre > bytes * tobits) /* in case 1 additional byte needed for TDI */
pm->wd8[j + i] = (tdi[i - 1] >> (8 - num_pre)); /* put last TDI bits there */
if (num + num_pre <= bytes * tobits) { /* in case no or 1 additional byte needed */
pm->wd8[j + i + 4] = tms_post >> (8 - (num + num_pre - 1) % 8); /* may need to add higher part */
/* in case exactly 1 additional byte needed */
} else if (num + num_pre > bytes * tobits && anum <= (bytes + 1) * tobits) {
pm->wd8[j + i + 4] = tms_post << ((num + num_pre - 1) % 8); /* add whole tms_post */
} else { /* in case 2 additional bytes, tms_post split */
pm->wd8[j + i + 4] = tms_post << ((num + num_pre - 1) % 8);/* add lower part of tms_post */
if (i % 4 == 3) /* next byte is in the next 32b word */
pm->wd8[j + i + 4 + 5] = tms_post >> (8 - (num + num_pre - 1) % 8); /* and higher part */
else /* next byte is in the same 32b word */
pm->wd8[j + i + 4 + 1] = tms_post >> (8 - (num + num_pre - 1) % 8); /* and higher part */
}
if (tdo) {
pm->rwords += words; /* keep track of the words to read */
vdc.tdo = tdo;
}
pm->wwords = waddr / 2 + hwords; /* payload size *2 to include both TDI and TMS data */
pm->waddr++;
}
if (!waddr) /* flush issued, but buffer empty */
;
else if (!vdc.trans_last) /* buffered request */
pm->offseth = waddr + hwords * 2; /* offset for next transaction, must be even */
else /* execute batch of requests */
rc = vdebug_run_jtag_queue(hsock, pm, pm->waddr);
vdc.trans_first = vdc.trans_last; /* flush forces trans_first flag */
return rc;
}
static int vdebug_mem_open(int hsock, struct vd_shm *pm, const char *path, uint8_t ndx)
{
int rc;
if (!path)
return ERROR_OK;
pm->cmd = VD_CMD_MEMOPEN;
pm->wbytes = strlen(path) + 1; /* includes terminating 0 */
pm->rbytes = 8;
pm->wwords = 0;
pm->rwords = 0;
memcpy(pm->wd8, path, pm->wbytes);
rc = vdebug_wait_server(hsock, pm);
if (rc) {
LOG_ERROR("0x%x opening memory %s", rc, path);
} else if (ndx != pm->rd16[1]) {
LOG_WARNING("Invalid memory index %" PRIu16 " returned. Direct memory access disabled", pm->rd16[1]);
} else {
vdc.mem_width[ndx] = pm->rd16[0] / 8; /* memory width in bytes */
vdc.mem_depth[ndx] = pm->rd32[1]; /* memory depth in words */
LOG_DEBUG("%" PRIx8 ": %s memory %" PRIu32 "x%" PRIu32 "B, buffer %" PRIu32 "x%" PRIu32 "B", ndx, path,
vdc.mem_depth[ndx], vdc.mem_width[ndx], VD_BUFFER_LEN / vdc.mem_width[ndx], vdc.mem_width[ndx]);
}
return ERROR_OK;
}
static void vdebug_mem_close(int hsock, struct vd_shm *pm, uint8_t ndx)
{
pm->cmd = VD_CMD_MEMCLOSE;
pm->rwdata = ndx; /* which memory */
pm->wbytes = 0;
pm->rbytes = 0;
pm->wwords = 0;
pm->rwords = 0;
vdebug_wait_server(hsock, pm);
LOG_DEBUG("%" PRIx8 ": %s", ndx, vdc.mem_path[ndx]);
}
static int vdebug_init(void)
{
vdc.hsocket = vdebug_socket_open(vdc.server_name, vdc.server_port);
pbuf = calloc(1, sizeof(struct vd_shm));
if (!pbuf) {
close_socket(vdc.hsocket);
vdc.hsocket = 0;
LOG_ERROR("cannot allocate %lu bytes", sizeof(struct vd_shm));
return ERROR_FAIL;
}
if (vdc.hsocket <= 0) {
free(pbuf);
pbuf = NULL;
LOG_ERROR("cannot connect to vdebug server %s:%" PRIu16,
vdc.server_name, vdc.server_port);
return ERROR_FAIL;
}
vdc.trans_first = 1;
vdc.poll_cycles = vdc.poll_max;
uint32_t sig_mask = VD_SIG_RESET | VD_SIG_TRST | VD_SIG_TCKDIV;
int rc = vdebug_open(vdc.hsocket, pbuf, vdc.bfm_path, vdc.bfm_type, vdc.bfm_period, sig_mask);
if (rc != 0) {
LOG_ERROR("cannot connect to %s, rc 0x%x", vdc.bfm_path, rc);
close_socket(vdc.hsocket);
vdc.hsocket = 0;
free(pbuf);
pbuf = NULL;
} else {
for (uint8_t i = 0; i < vdc.mem_ndx; i++) {
rc = vdebug_mem_open(vdc.hsocket, pbuf, vdc.mem_path[i], i);
if (rc != 0)
LOG_ERROR("cannot connect to %s, rc 0x%x", vdc.mem_path[i], rc);
}
LOG_INFO("vdebug %d connected to %s through %s:%" PRIu16,
VD_VERSION, vdc.bfm_path, vdc.server_name, vdc.server_port);
}
return rc;
}
static int vdebug_quit(void)
{
for (uint8_t i = 0; i < vdc.mem_ndx; i++)
if (vdc.mem_width[i])
vdebug_mem_close(vdc.hsocket, pbuf, i);
int rc = vdebug_close(vdc.hsocket, pbuf, vdc.bfm_type);
LOG_INFO("vdebug %d disconnected from %s through %s:%" PRIu16 " rc:%d", VD_VERSION,
vdc.bfm_path, vdc.server_name, vdc.server_port, rc);
if (vdc.hsocket)
close_socket(vdc.hsocket);
free(pbuf);
pbuf = NULL;
return ERROR_OK;
}
static int vdebug_reset(int trst, int srst)
{
uint16_t sig_val = 0xffff;
uint16_t sig_mask = 0;
sig_mask |= VD_SIG_RESET;
if (srst)
sig_val &= ~VD_SIG_RESET;/* active low */
if (transport_is_jtag()) {
sig_mask |= VD_SIG_TRST;
if (trst)
sig_val &= ~VD_SIG_TRST; /* active low */
}
LOG_INFO("rst trst:%d srst:%d mask:%" PRIx16 " val:%" PRIx16, trst, srst, sig_mask, sig_val);
int rc = vdebug_sig_set(vdc.hsocket, pbuf, sig_mask, sig_val);
if (rc == 0)
rc = vdebug_wait(vdc.hsocket, pbuf, 20); /* 20 clock cycles pulse */
return rc;
}
static int vdebug_jtag_tms_seq(const uint8_t *tms, int num, uint8_t f_flush)
{
LOG_INFO("tms len:%d tms:%x", num, *(const uint32_t *)tms);
return vdebug_jtag_shift_tap(vdc.hsocket, pbuf, num, *tms, 0, NULL, 0, 0, NULL, f_flush);
}
static int vdebug_jtag_path_move(struct pathmove_command *cmd, uint8_t f_flush)
{
uint8_t tms[DIV_ROUND_UP(cmd->num_states, 8)];
LOG_INFO("path num states %d", cmd->num_states);
memset(tms, 0, DIV_ROUND_UP(cmd->num_states, 8));
for (uint8_t i = 0; i < cmd->num_states; i++) {
if (tap_state_transition(tap_get_state(), true) == cmd->path[i])
buf_set_u32(tms, i, 1, 1);
tap_set_state(cmd->path[i]);
}
return vdebug_jtag_tms_seq(tms, cmd->num_states, f_flush);
}
static int vdebug_jtag_tlr(tap_state_t state, uint8_t f_flush)
{
int rc = ERROR_OK;
uint8_t cur = tap_get_state();
uint8_t tms_pre = tap_get_tms_path(cur, state);
uint8_t num_pre = tap_get_tms_path_len(cur, state);
LOG_INFO("tlr from %" PRIx8 " to %" PRIx8, cur, state);
if (cur != state) {
rc = vdebug_jtag_shift_tap(vdc.hsocket, pbuf, num_pre, tms_pre, 0, NULL, 0, 0, NULL, f_flush);
tap_set_state(state);
}
return rc;
}
static int vdebug_jtag_scan(struct scan_command *cmd, uint8_t f_flush)
{
int rc = ERROR_OK;
uint8_t cur = tap_get_state();
uint8_t state = cmd->ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT;
uint8_t tms_pre = tap_get_tms_path(cur, state);
uint8_t num_pre = tap_get_tms_path_len(cur, state);
uint8_t tms_post = tap_get_tms_path(state, cmd->end_state);
uint8_t num_post = tap_get_tms_path_len(state, cmd->end_state);
int num_bits = jtag_scan_size(cmd);
LOG_DEBUG("scan len:%d fields:%d ir/!dr:%d state cur:%x end:%x",
num_bits, cmd->num_fields, cmd->ir_scan, cur, cmd->end_state);
for (int i = 0; i < cmd->num_fields; i++) {
uint8_t cur_num_pre = i == 0 ? num_pre : 0;
uint8_t cur_tms_pre = i == 0 ? tms_pre : 0;
uint8_t cur_num_post = i == cmd->num_fields - 1 ? num_post : 0;
uint8_t cur_tms_post = i == cmd->num_fields - 1 ? tms_post : 0;
uint8_t cur_flush = i == cmd->num_fields - 1 ? f_flush : 0;
rc = vdebug_jtag_shift_tap(vdc.hsocket, pbuf, cur_num_pre, cur_tms_pre,
cmd->fields[i].num_bits, cmd->fields[i].out_value, cur_num_post, cur_tms_post,
cmd->fields[i].in_value, cur_flush);
if (rc)
break;
}
if (cur != cmd->end_state)
tap_set_state(cmd->end_state);
return rc;
}
static int vdebug_jtag_runtest(int cycles, tap_state_t state, uint8_t f_flush)
{
uint8_t cur = tap_get_state();
uint8_t tms_pre = tap_get_tms_path(cur, state);
uint8_t num_pre = tap_get_tms_path_len(cur, state);
LOG_DEBUG("idle len:%d state cur:%x end:%x", cycles, cur, state);
int rc = vdebug_jtag_shift_tap(vdc.hsocket, pbuf, num_pre, tms_pre, cycles, NULL, 0, 0, NULL, f_flush);
if (cur != state)
tap_set_state(state);
return rc;
}
static int vdebug_jtag_stableclocks(int num, uint8_t f_flush)
{
LOG_INFO("stab len:%d state cur:%x", num, tap_get_state());
return vdebug_jtag_shift_tap(vdc.hsocket, pbuf, 0, 0, num, NULL, 0, 0, NULL, f_flush);
}
static int vdebug_sleep(int us)
{
LOG_INFO("sleep %d us", us);
return vdebug_wait(vdc.hsocket, pbuf, us / 1000);
}
static int vdebug_jtag_speed(int speed)
{
unsigned int clkmax = VD_SCALE_PSTOMS / (vdc.bfm_period * 2); /* kHz */
unsigned int divval = clkmax / speed;
LOG_INFO("jclk speed:%d kHz set, BFM divider %u", speed, divval);
return vdebug_jtag_clock(vdc.hsocket, pbuf, divval);
}
static int vdebug_jtag_khz(int khz, int *jtag_speed)
{
unsigned int clkmax = VD_SCALE_PSTOMS / (vdc.bfm_period * 2); /* kHz */
unsigned int divval = khz ? clkmax / khz : 1;
*jtag_speed = clkmax / divval;
LOG_DEBUG("khz speed:%d from khz:%d", *jtag_speed, khz);
return ERROR_OK;
}
static int vdebug_jtag_div(int speed, int *khz)
{
*khz = speed;
LOG_DEBUG("div khz:%d from speed:%d", *khz, speed);
return ERROR_OK;
}
static int vdebug_jtag_execute_queue(void)
{
int rc = ERROR_OK;
for (struct jtag_command *cmd = jtag_command_queue; rc == ERROR_OK && cmd; cmd = cmd->next) {
switch (cmd->type) {
case JTAG_RUNTEST:
rc = vdebug_jtag_runtest(cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state, !cmd->next);
break;
case JTAG_STABLECLOCKS:
rc = vdebug_jtag_stableclocks(cmd->cmd.stableclocks->num_cycles, !cmd->next);
break;
case JTAG_TLR_RESET:
rc = vdebug_jtag_tlr(cmd->cmd.statemove->end_state, !cmd->next);
break;
case JTAG_PATHMOVE:
rc = vdebug_jtag_path_move(cmd->cmd.pathmove, !cmd->next);
break;
case JTAG_TMS:
rc = vdebug_jtag_tms_seq(cmd->cmd.tms->bits, cmd->cmd.tms->num_bits, !cmd->next);
break;
case JTAG_SLEEP:
rc = vdebug_sleep(cmd->cmd.sleep->us);
break;
case JTAG_SCAN:
rc = vdebug_jtag_scan(cmd->cmd.scan, !cmd->next);
break;
default:
LOG_ERROR("Unknown JTAG command type 0x%x encountered", cmd->type);
rc = ERROR_FAIL;
}
}
return rc;
}
COMMAND_HANDLER(vdebug_set_server)
{
if ((CMD_ARGC != 1) || !strchr(CMD_ARGV[0], ':'))
return ERROR_COMMAND_SYNTAX_ERROR;
char *pchar = strchr(CMD_ARGV[0], ':');
*pchar = '\0';
strncpy(vdc.server_name, CMD_ARGV[0], sizeof(vdc.server_name) - 1);
int port = atoi(++pchar);
if (port < 0 || port > UINT16_MAX) {
LOG_ERROR("invalid port number %d specified", port);
return ERROR_COMMAND_SYNTAX_ERROR;
}
vdc.server_port = port;
LOG_DEBUG("server: %s port %u", vdc.server_name, vdc.server_port);
return ERROR_OK;
}
COMMAND_HANDLER(vdebug_set_bfm)
{
char prefix;
if ((CMD_ARGC != 2) || (sscanf(CMD_ARGV[1], "%u%c", &vdc.bfm_period, &prefix) != 2))
return ERROR_COMMAND_SYNTAX_ERROR;
strncpy(vdc.bfm_path, CMD_ARGV[0], sizeof(vdc.bfm_path) - 1);
switch (prefix) {
case 'u':
vdc.bfm_period *= 1000000;
break;
case 'n':
vdc.bfm_period *= 1000;
break;
case 'p':
default:
break;
}
vdc.bfm_type = VD_BFM_JTAG;
LOG_DEBUG("bfm_path: %s clk_period %ups", vdc.bfm_path, vdc.bfm_period);
return ERROR_OK;
}
COMMAND_HANDLER(vdebug_set_mem)
{
if (CMD_ARGC != 3)
return ERROR_COMMAND_SYNTAX_ERROR;
if (vdc.mem_ndx >= VD_MAX_MEMORIES) {
LOG_ERROR("mem_path declared more than %d allowed times", VD_MAX_MEMORIES);
return ERROR_FAIL;
}
strncpy(vdc.mem_path[vdc.mem_ndx], CMD_ARGV[0], sizeof(vdc.mem_path[vdc.mem_ndx]) - 1);
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], vdc.mem_base[vdc.mem_ndx]);
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], vdc.mem_size[vdc.mem_ndx]);
LOG_DEBUG("mem_path: set %s @ 0x%08x+0x%08x", vdc.mem_path[vdc.mem_ndx],
vdc.mem_base[vdc.mem_ndx], vdc.mem_size[vdc.mem_ndx]);
vdc.mem_ndx++;
return ERROR_OK;
}
COMMAND_HANDLER(vdebug_set_batching)
{
if (CMD_ARGC != 1)
return ERROR_COMMAND_SYNTAX_ERROR;
if (isdigit((unsigned char)CMD_ARGV[0][0]))
vdc.trans_batch = (CMD_ARGV[0][0] == '0' ? 0 : (CMD_ARGV[0][0] == '1' ? 1 : 2));
else if (CMD_ARGV[0][0] == 'r')
vdc.trans_batch = VD_BATCH_WR;
else if (CMD_ARGV[0][0] == 'w')
vdc.trans_batch = VD_BATCH_WO;
else
vdc.trans_batch = VD_BATCH_NO;
LOG_DEBUG("batching: set to %u", vdc.trans_batch);
return ERROR_OK;
}
COMMAND_HANDLER(vdebug_set_polling)
{
if (CMD_ARGC != 2)
return ERROR_COMMAND_SYNTAX_ERROR;
vdc.poll_min = atoi(CMD_ARGV[0]);
vdc.poll_max = atoi(CMD_ARGV[1]);
LOG_DEBUG("polling: set min %u max %u", vdc.poll_min, vdc.poll_max);
return ERROR_OK;
}
static const struct command_registration vdebug_command_handlers[] = {
{
.name = "server",
.handler = &vdebug_set_server,
.mode = COMMAND_CONFIG,
.help = "set the vdebug server name or address",
.usage = "<host:port>",
},
{
.name = "bfm_path",
.handler = &vdebug_set_bfm,
.mode = COMMAND_CONFIG,
.help = "set the vdebug BFM hierarchical path",
.usage = "<path> <clk_period[p|n|u]s>",
},
{
.name = "mem_path",
.handler = &vdebug_set_mem,
.mode = COMMAND_ANY,
.help = "set the design memory for the code load",
.usage = "<path> <base_address> <size>",
},
{
.name = "batching",
.handler = &vdebug_set_batching,
.mode = COMMAND_CONFIG,
.help = "set the transaction batching no|wr|rd [0|1|2]",
.usage = "<level>",
},
{
.name = "polling",
.handler = &vdebug_set_polling,
.mode = COMMAND_CONFIG,
.help = "set the polling pause, executing hardware cycles between min and max",
.usage = "<min cycles> <max cycles>",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration vdebug_command[] = {
{
.name = "vdebug",
.chain = vdebug_command_handlers,
.mode = COMMAND_ANY,
.help = "vdebug command group",
.usage = "",
},
COMMAND_REGISTRATION_DONE
};
static struct jtag_interface vdebug_jtag_ops = {
.supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = vdebug_jtag_execute_queue,
};
struct adapter_driver vdebug_adapter_driver = {
.name = "vdebug",
.transports = jtag_only,
.speed = vdebug_jtag_speed,
.khz = vdebug_jtag_khz,
.speed_div = vdebug_jtag_div,
.commands = vdebug_command,
.init = vdebug_init,
.quit = vdebug_quit,
.reset = vdebug_reset,
.jtag_ops = &vdebug_jtag_ops,
};
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