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tb_daq.cpp
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tb_daq.cpp
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#include <stdlib.h>
#include <stddef.h>
#include <setjmp.h>
#include <stdarg.h>
#include <pcre.h>
#include <arpa/inet.h>
#include "Vtb_daq.h"
#include "verilated.h"
#include "vsyms.h"
static int color_disabled = 0;
#ifndef min
#define min(a,b) ((a) < (b) ? (a) : (b))
#endif
#define HZ 48000000
#define WF_WATCH 1
#define WF_PRINT 2
#define WF_ALL (WF_WATCH | WF_PRINT)
#define FORM_BIN 1
#define FORM_HEX 2
#define FORM_DEC 3
#define COLOR_NONE 1
#define COLOR_CHANGED 2
#define COLOR_ALWAYS 3
typedef struct _watch_entry {
int sig; /* signal number */
char *nick;
int flags;
void *val;
uint64_t *mask;
int format;
int cmp;
} watch_entry_t;
typedef struct _watch {
watch_entry_t *we;
int n;
Vtb_daq *tb;
uint64_t last_cycle;
} watch_t;
typedef struct {
Vtb_daq *tb;
uint64_t last_change;
watch_t *wp;
uint64_t cycle;
jmp_buf main_jb;
jmp_buf test_jb;
vluint8_t *signal8p;
vluint8_t signal8v;
uint64_t delay_until;
} sim_t;
static void fail(const char *msg, ...);
static void signal_tick(sim_t *sp);
watch_t *
watch_init(Vtb_daq *tb)
{
watch_t *wp = (watch_t *)calloc(sizeof(*wp), 1);
wp->we = (watch_entry_t *)calloc(sizeof(*wp->we), NSIGS * 10);
wp->tb = tb;
return wp;
}
static int
sig_to_len(int sig)
{
int len;
switch (vsigs[sig].type) {
case sigC: len = 1; break;
case sigS: len = 2; break;
case sigI: len = 4; break;
case sigQ: len = 8; break;
case sigW: len = 4; break;
default:
printf("inval sig type\n");
exit(1);
}
return len * vsigs[sig].num;
}
static void *
watch_get_value(watch_t *wp, int sig)
{
int len = sig_to_len(sig);
Vtb_daq *tb = wp->tb;
void *v = malloc(len);
memcpy(v, (uint8_t *)tb + vsigs[sig].offset, len);
return v;
}
static int
watch_cmp_value(int sig, void *v1, void *v2, uint64_t *mask)
{
int len = sig_to_len(sig);
return memcmp(v1, v2, len);
}
static int
find_signal(const char *name, int *start)
{
int i;
const char *err_str;
int err_off;
int ret;
pcre *comp = pcre_compile(name, 0, &err_str, &err_off, NULL);
if (comp == NULL) {
printf("name %s not a valid regexp: %s\n", name, err_str);
exit(1);
}
for (i = *start; i < NSIGS; ++i) {
ret = pcre_exec(comp, NULL, vsigs[i].name,
strlen(vsigs[i].name), 0, 0, NULL, 0);
if (ret == PCRE_ERROR_NOMATCH)
continue;
if (ret < 0) {
printf("pcre match failed with %d\n", ret);
exit(1);
}
*start = i + 1;
return i;
}
return -1;
}
static void
watch_add(watch_t *wp, const char *name, const char *nick, uint64_t *mask,
int format, int flags)
{
int _r = 0;
int at_least_one = 0;
int sig;
while ((sig = find_signal(name, &_r)) >= 0) {
if (nick)
printf("watch: adding %s as %s\n", vsigs[sig].name, nick);
else
printf("watch: adding %s as <unnamed>\n", vsigs[sig].name);
wp->we[wp->n].sig = sig;
wp->we[wp->n].nick = nick ? strdup(nick) : NULL;
wp->we[wp->n].flags = flags;
wp->we[wp->n].format = format;
wp->we[wp->n].val = watch_get_value(wp, sig);
/* TODO: save mask */
++wp->n;
if (wp->n == NSIGS * 10) {
printf("too many signals in watchlist\n");
exit(1);
}
at_least_one = 1;
nick = NULL;
}
if (!at_least_one) {
printf("name %s doesn't match any signal\n", name);
exit(0);
}
}
static void
watch_remove(watch_t *wp, const char *name)
{
int _r = 0;
int sig;
int i;
while ((sig = find_signal(name, &_r)) >= 0) {
for (i = 0; i < wp->n; ++i) {
if (wp->we[i].sig == sig) {
free(wp->we[i].nick);
free(wp->we[i].val);
memmove(wp->we + i, wp->we + i + 1, sizeof(*wp->we) * (wp->n - i));
--wp->n;
break;
}
}
}
}
static void
watch_clear(watch_t *wp)
{
int i;
for (i = 0; i < wp->n; ++i) {
free(wp->we[i].nick);
free(wp->we[i].val);
}
wp->n = 0;
}
#define C_BLACK "\e[30m"
#define C_RED "\e[31m"
#define C_GREEN "\e[32m"
#define C_YELLOW "\e[33m"
#define C_BLUE "\e[34m"
#define C_MAGENTA "\e[35m"
#define C_CYAN "\e[36m"
#define C_WHITE "\e[37m"
#define C_RESET "\e[0m"
static void
print_value(watch_entry_t *we, int do_color)
{
int len = sig_to_len(we->sig);
const char *c = NULL;
char outbuf[1000];
uint64_t v;
int type = vsigs[we->sig].type;
if (color_disabled)
do_color = COLOR_NONE;
if (do_color == COLOR_CHANGED && we->cmp)
c = C_RED;
else if (do_color == COLOR_ALWAYS)
c = C_GREEN;
if (we->nick)
printf(" %s %s", we->nick, c ? c : "");
else
printf(" %s", c ? c : "");
for (int i = 0; i < vsigs[we->sig].num; ++i) {
uint64_t val;
if (i > 0)
printf("/");
if (type == sigC)
val = ((uint8_t *)we->val)[i];
else if (type == sigS)
val = ((uint16_t *)we->val)[i];
else if (type == sigI)
val = ((uint32_t *)we->val)[i];
else if (type == sigQ)
val = ((uint64_t *)we->val)[i];
else if (type == sigW)
val = ((uint32_t *)we->val)[i];
if (we->format == FORM_HEX) {
printf("%lx", val);
} else if (we->format == FORM_DEC) {
printf("%ld", val);
} else if (we->format == FORM_BIN) {
int first = 0;
int i;
for (i = 63; i >= 0; --i) {
int bit = (val & (1ul << 63)) != 0;
val <<= 1;
if (bit == 0 && !first)
continue;
first = 1;
printf("%d", bit);
}
if (!first)
printf("0");
} else {
printf("invalid format %d\n", we->format);
exit(1);
}
}
if (c)
printf("%s", C_RESET);
}
static void
do_watch(watch_t *wp, uint64_t cycle)
{
int i;
int same = 1;
int header_done;
void *v;
if (cycle - wp->last_cycle > 1000000)
fail("abort due to inactivity\n");
/*
* compare signals
*/
for (i = 0; i < wp->n; ++i) {
watch_entry_t *we = wp->we + i;
int ret = 0;
void *v = NULL;
v = watch_get_value(wp, we->sig);
ret = watch_cmp_value(we->sig, we->val, v, we->mask);
if (ret != 0 && (we->flags & WF_WATCH))
same = 0;
we->cmp = ret;
free(we->val);
we->val = v;
}
if (same)
return;
uint64_t diff = cycle - wp->last_cycle;
/* print all fixed values */
header_done = 0;
for (i = 0; i < wp->n; ++i) {
watch_entry_t *we = wp->we + i;
int flags = we->flags;
if (flags & WF_PRINT) {
if (!header_done) {
printf("% 10d % 6d", cycle, diff);
header_done = 1;
}
print_value(we, COLOR_CHANGED);
}
}
if (header_done)
printf("\n");
header_done = 0;
/* print watch-only first */
for (i = 0; i < wp->n; ++i) {
watch_entry_t *we = wp->we + i;
int flags = we->flags;
if (flags & WF_WATCH && we->cmp && ~flags & WF_PRINT) {
if (!header_done) {
printf("% 10d % 6d changed", cycle, diff);
header_done = 1;
}
print_value(we, COLOR_NONE);
}
}
if (header_done)
printf("\n");
wp->last_cycle = cycle;
}
/*
* main tick loop
*/
static void test(sim_t *sp);
static sim_t *
init(Vtb_daq *tb)
{
sim_t *sp = (sim_t *)calloc(1, sizeof(*sp));
uint64_t d = HZ / 250000; /* uart divider */
sp->tb = tb;
sp->last_change = 0;
sp->cycle = 0;
sp->wp = watch_init(tb);
return sp;
}
static void
yield(sim_t *sp)
{
if (setjmp(sp->test_jb) == 0)
longjmp(sp->main_jb, 1);
}
static void
step(sim_t *sp, uint64_t cycle)
{
int ret;
Vtb_daq *tb = sp->tb;
int want_dump = 0;
sp->cycle = cycle;
signal_tick(sp);
/* watch output before test, so we might see failure reasons */
do_watch(sp->wp, cycle);
/* continue test procedure */
ret = setjmp(sp->main_jb);
if (ret == 0)
longjmp(sp->test_jb, 1);
if (ret == 1)
want_dump = 1;
fflush(stdout);
}
static void
delay(sim_t *sp, uint64_t ticks)
{
sp->delay_until = sp->cycle + ticks;
while (sp->cycle < sp->delay_until)
yield(sp);
}
static void
wait_for_signal8(sim_t *sp, vluint8_t *signal, vluint8_t val)
{
sp->signal8p = signal;
sp->signal8v = val;
while (*sp->signal8p != sp->signal8v)
yield(sp);
}
static void
fail(const char *msg, ...)
{
va_list ap;
va_start(ap, msg);
printf("test failed: ");
vprintf(msg, ap);
exit(1);
}
static void
check_packet(sim_t *sp, uint32_t *exp_data, int exp_len, int *seq)
{
Vtb_daq *tb = sp->tb;
int i;
int j;
int plen;
uint32_t buf[500];
uint8_t *p = (uint8_t *)buf;
/* wait for packet */
for (i = 0; i < 481000; ++i) {
if (tb->eth_tx_en)
break;
yield(sp);
}
if (i == 481000)
fail("no packet found\n");
/* first receive all bits */
for (i = 0; i < 1530; ++i) {
uint8_t b = 0;
if (tb->eth_tx_en == 0)
break;
for (j = 0; j < 4; ++j) {
if (tb->eth_tx_en == 0)
fail("tx_en deasserted mid-octet\n");
b = (b >> 2) | (tb->eth_tx0 << 6) | (tb->eth_tx1 << 7);
yield(sp);
}
p[i] = b;
}
if (i > 1522)
fail("packet too long\n");
plen = i;
printf("PACKET: ");
for (i = 0; i < plen; ++i)
printf("%02x ", p[i]);
printf("\n");
/* check IPG */
for (i = 0; i < 12 * 4; ++i) {
if (tb->eth_tx0 || tb->eth_tx1)
fail("activity during inter packet gap\n");
yield(sp);
}
if (plen < 68)
fail("frame too short\n");
if ((plen % 4) != 0)
fail("frame length not multiple of 4\n");
if (ntohl(buf[0]) != 0x55555555)
fail("bad preamble1\n");
if (ntohl(buf[1]) != 0x555555d5)
fail("bad preamble2\n");
if (ntohl(buf[2]) != 0x66554433)
fail("bad dst mac\n");
if (ntohl(buf[3]) != 0x22111234)
fail("bad dst/src mac\n");
if (ntohl(buf[4]) != 0x56789abc)
fail("bad src mac\n");
if ((ntohl(buf[5]) & 0xffff0000) != 0x51390000)
fail("ether type/fill %08x\n", ntohl(buf[5]));
if ((ntohl(buf[5]) & 0xfff) != *seq)
fail("seq %d != %d\n", ntohl(buf[5]) & 0xffff, *seq);
(*seq)++;
/* calculate crc */
uint32_t crc = 0xffffffff;
for (i = 8; i < plen - 4; ++i) {
unsigned int byte, mask;
byte = p[i];
crc = crc ^ byte;
for (j = 7; j >= 0; j--) {
mask = -(crc & 1);
crc = (crc >> 1) ^ (0xEDB88320 & mask);
}
}
crc = ~crc;
uint32_t recv_crc = buf[plen / 4 - 1]; /* no bswap */
if (recv_crc != crc)
fail("crc differ: recv %08x calc %08x\n", recv_crc, crc);
if (plen != 28 + (exp_len < 11 ? 11 : exp_len) * 4)
fail("bad packet length %d\n", plen);
for (i = 0; i < exp_len; ++i) {
if (ntohl(buf[6 + i]) != exp_data[i])
fail("bad packet contents at %d: is %x should %x\n",
i, ntohl(buf[6 + i]), exp_data[i]);
}
for (i = exp_len; i < 11; ++i)
if (buf[6 + i] != 0xffffffff)
fail("bad packet filler at %i\n", i);
}
void
send_packet(sim_t *sp, int channel, uint32_t *buf, int len)
{
Vtb_daq *tb = sp->tb;
int i;
int mask = 1 << channel;
tb->daq_req |= mask;
delay(sp, 1);
for (i = 0; i < 1000; ++i) {
if (tb->daq_grant & mask)
break;
yield(sp);
}
if (i == 1000)
fail("grant not set\n");
tb->daq_req &= ~mask;
delay(sp, 1);
tb->daq_valid = mask;
for (i = 0; i < len; ++i) {
tb->daq_data[channel] = buf[i];
if (i == len - 1)
tb->daq_end = mask;
delay(sp, 1);
}
tb->daq_valid &= ~mask;
tb->daq_end &= ~mask;
}
static void
test_daq(sim_t *sp)
{
Vtb_daq *tb = sp->tb;
int i;
uint32_t starttime;
uint32_t buf[10000];
int len;
int seq = 0;
int first_packet_len;
int first_packet_done;
tb->daq_req = 0;
watch_add(sp->wp, "eth_tx0", "tx0", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "eth_tx1", "tx1", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "eth_tx_en", "tx_en", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "^daq_req$", "req", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "^daq_grant$", "grant", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "^daq_valid$", "valid", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "^daq_end$", "end", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_daq.state$", "d_state", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "^daqo_len_ready$", "len_ready", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "^daqo_len$", "len", NULL, FORM_DEC, WF_ALL);
#if 1
watch_add(sp->wp, "^daqo_data$", "data", NULL, FORM_HEX, WF_ALL);
#endif
watch_add(sp->wp, "^daqo_len_rd_en$", "len_rd_en", NULL, FORM_BIN, WF_ALL);
watch_add(sp->wp, "^daqo_data_rd_en$", "data_rd_en", NULL, FORM_BIN, WF_ALL);
watch_add(sp->wp, "u_mac.next_len$", "n_len", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.data_len$", "d_len", NULL, FORM_DEC, WF_ALL);
#if 0
watch_add(sp->wp, "u_mac.state$", "m_state", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.tx_state$", "t_state", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.tx_dicnt$", "dicnt", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.next_eof$", "n_eof", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.tx_eof$", "t_eof", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.tx_data$", "t_data", NULL, FORM_HEX, WF_ALL);
#endif
watch_add(sp->wp, "u_mac.next_data$", "n_data", NULL, FORM_HEX, WF_ALL);
#if 0
watch_add(sp->wp, "data_fifo_data", "df_data", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "data_fifo_wr_en", "df_wr_en", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_daq.daq_data", "daq_data", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_daq.daq_valid", "daq_valid", NULL, FORM_BIN, WF_ALL);
watch_add(sp->wp, "u_mac.crc$", "crc", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_mac.crc_data", "crc_data", NULL, FORM_HEX, WF_ALL);
#endif
watch_add(sp->wp, "u_daq.rptr$", "rptr", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_daq.wptr$", "wptr", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_daq.data_ring_full$", "full", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_daq.data_ring_empty$", "empty", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_daq.discarded_pkts$", "disc_p", NULL, FORM_DEC, WF_ALL);
watch_add(sp->wp, "u_mac.enable$", "enable", NULL, FORM_DEC, WF_ALL);
delay(sp, 1000);
tb->daq_data[0] = 0x11223344;
tb->daq_data[1] = 0xaabbccdd;
tb->daq_data[2] = 0x01234567;
tb->daq_data[3] = 0x456789ab;
tb->daq_data[4] = 0xffeeddcc;
tb->daq_valid = 0;
tb->daq_end = 0;
tb->enable = 2; /* running */
delay(sp, 10);
/*
* send a single packet and wait for it to be sent
* by timeout
*/
buf[0] = 0x18293a4b;
buf[1] = 0x33aa1122;
send_packet(sp, 1, buf, 2);
/* wait for the packet */
for (i = 0; i < 481000; ++i) {
if (tb->eth_tx_en == 1)
break;
delay(sp, 1);
}
if (i < 470000)
fail("packet too early at %d\n", i);
if (i == 481000)
fail("no packet\n");
check_packet(sp, buf, 2, &seq);
/*
* send two packets with a short gap, should arrive as one
*/
buf[0] = 0xa124512f;
buf[1] = 0xda324a9c;
buf[2] = 0xcc10afec;
buf[3] = 0x99ab2100;
send_packet(sp, 1, buf, 3);
delay(sp, 5000);
send_packet(sp, 1, buf + 3, 1);
delay(sp, 1000);
check_packet(sp, buf, 4, &seq);
/*
* send enough data to fill 1 1/2 packets. the first one has to arrive
* full
* spread over some channels
* we set the daq to queueing again. this way we don't need to receive
* while filling the buffer
*/
tb->enable = 0;
delay(sp, 2);
srand(0);
first_packet_len = 0;
first_packet_done = 0;
for (i = 0; i < 10000; ++i)
buf[i] = rand();
for (i = 0; i < 500;) {
int len = rand() % 9 + 1;
int channel = rand() % 5;
if (len > 500 - i)
len = 500 - i;
send_packet(sp, channel, buf + i, len);
delay(sp, 1 + rand() % 20);
i += len;
if (!first_packet_done && first_packet_len + len <= 375) {
first_packet_len += len;
} else {
first_packet_done = 1;
}
}
/* now set the maschine to running again and let the buffer drain */
tb->enable = 2; /* running */
check_packet(sp, buf, first_packet_len, &seq);
check_packet(sp, buf + first_packet_len, 500 - first_packet_len, &seq);
delay(sp, 1000);
/* test discard mode */
tb->enable = 1; /* discard */
delay(sp, 2);
for (i = 0; i < 100; i += 3)
send_packet(sp, 0, buf + i, 3);
/* give it some time to discard */
delay(sp, 2000);
if (tb->tb_daq__DOT__daqo_len_ready)
fail("packets not discarded\n");
tb->enable = 0; /* queue */
delay(sp, 2);
/*
* fill the whole buffer and see that new packets get discarded properly
*/
for (i = 0; i < 8192 - 16; i += 16)
send_packet(sp, 0, buf + i, 16);
send_packet(sp, 0, buf + i, 13);
/* this packet is supposed to be discarded */
send_packet(sp, 0, buf + i + 14, 6);
/* this packet still fits */
send_packet(sp, 0, buf + i + 14, 1);
/* these will be discarded again */
send_packet(sp, 0, buf + i + 14, 8);
send_packet(sp, 0, buf + i + 14, 4);
send_packet(sp, 0, buf + i + 20, 3);
tb->enable = 2; /* running */
delay(sp, 2);
for (i = 0; i < 8192 - 16 - 368; i += 368)
check_packet(sp, buf + i, 368, &seq);
/* patch the discard marker into the expected buffer */
buf[(8192 - 16) + 13] = 0xfe000001;
buf[(8192 - 16) + 15] = 0xfe000003;
check_packet(sp, buf + i, (8192 - 16) % 368 + 13 + 3, &seq);
/* see if all is working again */
send_packet(sp, 0, buf + 100, 8);
check_packet(sp, buf + 100, 8, &seq);
#if 0
printf("sleep\n"); sleep(1000);
#endif
watch_clear(sp->wp);
}
static void
signal_tick(sim_t *sp)
{
Vtb_daq *tb = sp->tb;
tb->sig_grant = tb->sig_req;
}
#define PST_SOP 0
#define PST_IN_PACKET 1
typedef struct _parser {
uint32_t *buf;
int len; /* length of buffer */
int ptr; /* current pointer into buffer */
int ix; /* bit index in current word */
int state; /* parser state */
int p_end; /* end of current packet (excl.) */
int rle_len;/* bit width of rle counter */
int sig_width;/* bit width signal */
uint32_t recv_systime; /* systime at start of packet */
int resid_len; /* residual from prev packet */
uint32_t resid;
int not_first_packet;
int eos; /* end of stream */
uint32_t systime;
int recv_off;
int check_off;
} parser_t;
/*
* can return a partial result. call as often as necessary
*/
static int
_get_bits(parser_t *p, int num, uint32_t *res)
{
uint32_t ret = 0;
int i;
if (p->eos)
fail("data requested at end of stream\n");
if (p->state == PST_SOP) {
uint32_t h1;
uint32_t h2;
int off;
/* read start of packet */
if (p->ptr + 2 > p->len)
fail("not a full header in stream\n");
h1 = p->buf[p->ptr++];
h2 = p->buf[p->ptr++];
if ((h1 >> 24) != 0x40)
fail("not a signal packet (0x%02x)\n", h1 >> 24);
off = (h1 >> 18) & 0x1f;
p->p_end = p->ptr + (h1 & 0xff);
if (p->not_first_packet && ((h1 >> 13) & 0x1f) != p->rle_len)
fail("rle len changed\n");
p->rle_len = (h1 >> 13) & 0x1f;
if (p->not_first_packet && ((h1 >> 8) & 0x1f) != p->sig_width)
fail("sig width changed\n");
p->sig_width = (h1 >> 8) & 0x1f;
p->recv_systime = h2;
p->recv_off = off;
p->check_off = 1;
if (!p->not_first_packet) {
if (off != 0)
fail("offset in first packet\n");
}
p->not_first_packet = 1;
printf("SOP: off %d ptr %d end %d rle_len %d sig_width %d systime %d\n",
off, p->ptr, p->p_end, p->rle_len, p->sig_width, p->recv_systime);
p->state = PST_IN_PACKET;
*res = 0;
return 0;
}
if (p->state == PST_IN_PACKET) {
int n = min(32 - p->ix, num);
*res = (p->buf[p->ptr] >> (32 - p->ix - n));
*res &= (1 << n) - 1;
p->ix += n;
if (p->ix == 32) {
++p->ptr;
p->ix = 0;
if (p->ptr == p->p_end)
p->state = PST_SOP;
if (p->ptr == p->len)
p->eos = 1;
}
printf("new ix %d ptr %d res %x rlen %d\n", p->ix, p->ptr, *res, n);
return n;
}
}
static uint32_t
get_bits(parser_t *p, int num)
{
uint32_t r;
uint32_t res = 0;
int n;
while (num > 0) {
n = _get_bits(p, num, &r);
res <<= n;
res |= r;
num -= n;
};
return res;
}
static void
check_offset(parser_t *p)
{
uint32_t r;
/*
* at start of packet, push header through to get current values
* for the check below
*/
if (p->state == PST_SOP)
_get_bits(p, 0, &r);
if (!p->check_off)
return;
p->check_off = 0;
printf("own systime %d recv %d diff %d off %d recv %d\n",
p->systime, p->recv_systime, p->systime - p->recv_systime,
p->ix, p->recv_off);
if (p->systime != p->recv_systime || p->ix != p->recv_off)
fail("bad systime/ix in header\n");
}
static void
expand_sig(parser_t *p, uint32_t *out, int outmax)
{
int outlen = 0;
uint32_t slot;
uint32_t sample;
uint32_t scnt;
uint32_t pipeline[6] = { 0 };
int i;
printf("rle_len %d sig_width %d\n", p->rle_len, p->sig_width);
while (1) {
check_offset(p);
slot = get_bits(p, 3);
if (slot == 0) {
sample = get_bits(p, p->sig_width);
printf("got direct %x\n", sample);
out[outlen++] = sample;
if (outlen == outmax)
return;
scnt = 1;
memmove(pipeline + 1, pipeline + 0, sizeof(*pipeline) * 6);
pipeline[0] = sample;
} else {
scnt = get_bits(p, 1);
if (scnt == 0) {
scnt = get_bits(p, 4);
} else {
scnt = get_bits(p, 1);
if (scnt == 0) {
scnt = get_bits(p, 8);
} else {
scnt = get_bits(p, 1);
if (scnt == 1)
fail("inval cnt encoding\n");
scnt = get_bits(p, p->rle_len);
}
}
printf("got slot %d cnt %d\n", slot, scnt);
sample = pipeline[slot - 1];
memmove(pipeline + 1, pipeline + 0, sizeof(*pipeline) * (slot - 1));
pipeline[0] = sample;
printf("sample %x cnt %d\n", sample, scnt);
for (i = 0; i < scnt; ++i) {
out[outlen++] = sample;
if (outlen == outmax)
return;
}
}
p->systime += scnt;
}
}
static void
send_and_test_stimulus(sim_t *sp, uint32_t *buf, int len)
{
Vtb_daq *tb = sp->tb;
int i;
int rlen = 0;
uint32_t *result = (uint32_t *)malloc(sizeof(*result) * (len * 2 + 1000));
uint32_t systime = sp->cycle - 1;
for (i = 0; i < len + 50000; ++i) {
if (i < len) /* + 50000 cycles to push everything out */
tb->signal = buf[i];
yield(sp);
if (tb->sig_valid) {
result[rlen++] = tb->sig_data;
printf("recv: %08x\n", tb->sig_data);
}
}
printf("have result len %d\n", rlen);
parser_t p = { 0 };
p.buf = result;
p.len = rlen;
p.systime = systime;
int outlen = len + 3;
uint32_t *out = (uint32_t *)malloc(sizeof(*out) * outlen);
expand_sig(&p, out, outlen);
printf("expanded to %d samples\n", outlen);
/* discard first 3 0-word, sig inserts it at the start */
if (out[0] != 0 || out[1] != 0 || out[2] != 0)
fail("expected 3x 0 at start of stream\n");
for (i = 0; i < len; ++i)
if (out[i + 3] != buf[i])
fail("received data differ at %d: %x != %x\n", i,
out[i + 3], buf[i]);
free(out);
free(result);
}
static void
test_signal(sim_t *sp)
{
Vtb_daq *tb = sp->tb;
int i;
#if 0
watch_add(sp->wp, "u_signal.systime", "in", NULL, FORM_DEC, WF_ALL);
#endif
watch_add(sp->wp, "u_signal.signal", "in", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_signal.recv", "recv", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_signal.pipeline", "pipeline", NULL, FORM_HEX, WF_ALL);
watch_add(sp->wp, "u_signal.pvalid", "pvalid", NULL, FORM_BIN, WF_ALL);
watch_add(sp->wp, "u_signal.slot$", "slot", NULL, FORM_HEX, WF_ALL);
#if 0
watch_add(sp->wp, "u_signal.slot_cnt$", "scnt", NULL, FORM_HEX, WF_ALL);