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mibuild/sim: clean up and move eth struct to sim

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This commit is contained in:
Florent Kermarrec 2015-03-09 14:37:04 +01:00
parent a72c091bc2
commit efc5f221d9
1 changed files with 93 additions and 83 deletions
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176
mibuild/sim/dut_tb.cpp
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@ -17,6 +17,16 @@
#include <linux/if.h> #include <linux/if.h>
#include <linux/if_tun.h> #include <linux/if_tun.h>
/* ios */
#ifdef SERIAL_SOURCE_STB
#define WITH_SERIAL
#endif
#ifdef ETH_SOURCE_STB
#define WITH_ETH
#endif
#define MAX(a,b) (((a)>(b))?(a):(b)) #define MAX(a,b) (((a)>(b))?(a):(b))
#define MIN(a,b) (((a)<(b))?(a):(b)) #define MIN(a,b) (((a)<(b))?(a):(b))
@ -28,9 +38,36 @@ double sc_time_stamp()
return main_time; return main_time;
} }
/* ios */ /* Sim struct */
struct sim {
bool run;
/* Terminal functions */ unsigned int tick;
clock_t start;
clock_t end;
float speed;
#ifdef WITH_SERIAL
char rx_serial_stb;
char rx_serial_data;
char rx_serial_presented;
#endif
#ifdef WITH_ETH
const char *eth_dev;
const char *eth_tap;
int eth_fd;
unsigned char eth_txbuffer[2048];
unsigned char eth_rxbuffer[2048];
int eth_txbuffer_len;
int eth_rxbuffer_len;
int eth_rxbuffer_pos;
int eth_last_source_stb;
#endif
};
/* Serial functions */
#ifdef WITH_SERIAL
struct termios orig_termios; struct termios orig_termios;
void reset_terminal_mode(void) void reset_terminal_mode(void)
@ -71,6 +108,7 @@ int getch(void)
return c; return c;
} }
} }
#endif
/* Ethernet functions */ /* Ethernet functions */
/* create tap: /* create tap:
@ -79,98 +117,73 @@ int getch(void)
mknod /dev/net/tap0 c 10 200 mknod /dev/net/tap0 c 10 200
delete tap: delete tap:
openvpn --rmtun --dev tap0 */ openvpn --rmtun --dev tap0 */
#ifdef ETH_SOURCE_STB #ifdef WITH_ETH
unsigned char eth_txbuffer[1532]; void eth_init(struct sim *s, const char *dev, const char*tap)
unsigned char eth_rxbuffer[1532];
int eth_txbuffer_len = 0;
int eth_rxbuffer_len = 0;
int eth_rxbuffer_pos = 0;
struct eth_device
{ {
char *dev; s->eth_txbuffer_len = 0;
char *tap; s->eth_rxbuffer_len = 0;
int fd; s->eth_rxbuffer_pos = 0;
}; s->eth_last_source_stb = 0;
s->eth_dev = dev;
s->eth_tap = tap;
}
void eth_open(struct eth_device *eth) void eth_open(struct sim *s)
{ {
struct ifreq ifr; struct ifreq ifr;
eth->fd = open (eth->dev, O_RDWR); s->eth_fd = open (s->eth_dev, O_RDWR);
if(eth->fd < 0) { if(s->eth_fd < 0) {
fprintf (stderr, " Could not open dev %s\n", eth->dev); fprintf (stderr, " Could not open dev %s\n", s->eth_dev);
return; return;
} }
memset (&ifr, 0, sizeof(ifr)); memset (&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI; ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strncpy (ifr.ifr_name, eth->tap, IFNAMSIZ); strncpy (ifr.ifr_name, s->eth_tap, IFNAMSIZ);
if (ioctl (eth->fd, TUNSETIFF, (void *) &ifr) < 0) { if (ioctl (s->eth_fd, TUNSETIFF, (void *) &ifr) < 0) {
fprintf (stderr, " Could not set %s\n", eth->tap); fprintf (stderr, " Could not set %s\n", s->eth_tap);
close(eth->fd); close(s->eth_fd);
} }
return; return;
} }
int eth_close(struct eth_device *eth) int eth_close(struct sim *s)
{ {
if (eth->fd < 0) if (s->eth_fd < 0)
close(eth->fd); close(s->eth_fd);
} }
void eth_write_tap( void eth_write_tap(struct sim *s, unsigned char *buf, int len)
struct eth_device *eth,
unsigned char *buf,
unsigned long int length)
{ {
write (eth->fd, buf, length); write (s->eth_fd, buf, len);
} }
int eth_read_tap ( int eth_read_tap (struct sim *s, unsigned char *buf)
struct eth_device *eth,
unsigned char *buf)
{ {
struct pollfd fds[1]; struct pollfd fds[1];
int n; int n;
int length; int len;
fds[0].fd = eth->fd; fds[0].fd = s->eth_fd;
fds[0].events = POLLIN; fds[0].events = POLLIN;
n = poll(fds, 1, 0); n = poll(fds, 1, 0);
if ((n > 0) && ((fds[0].revents & POLLIN) == POLLIN)) { if ((n > 0) && ((fds[0].revents & POLLIN) == POLLIN)) {
length = read(eth->fd, buf, 1532); len = read(s->eth_fd, buf, 1532);
} else { } else {
length = 0; len = 0;
} }
return length; return len;
} }
#endif #endif
Vdut* dut; Vdut* dut;
VerilatedVcdC* tfp; VerilatedVcdC* tfp;
#define MAX_LEN 2048 #ifdef WITH_SERIAL
struct sim {
bool run;
unsigned int tick;
clock_t start;
clock_t end;
float speed;
char txbuffer[MAX_LEN];
char rxbuffer[MAX_LEN];
char rx_serial_stb;
char rx_serial_data;
char rx_serial_presented;
};
int console_service(struct sim *s) int console_service(struct sim *s)
{ {
/* fpga --> console */ /* fpga --> console */
@ -198,38 +211,37 @@ int console_service(struct sim *s)
} }
return 0; return 0;
} }
#endif
#ifdef ETH_SOURCE_STB #ifdef WITH_ETH
int eth_last_source_stb = 0; int ethernet_service(struct sim *s) {
int ethernet_service(struct eth_device *eth) {
/* fpga --> tap */ /* fpga --> tap */
ETH_SOURCE_ACK = 1; ETH_SOURCE_ACK = 1;
if(ETH_SOURCE_STB == 1) { if(ETH_SOURCE_STB == 1) {
eth_txbuffer[eth_txbuffer_len] = ETH_SOURCE_DATA; s->eth_txbuffer[s->eth_txbuffer_len] = ETH_SOURCE_DATA;
eth_txbuffer_len++; s->eth_txbuffer_len++;
} else { } else {
if (eth_last_source_stb) { if (s->eth_last_source_stb) {
eth_write_tap(eth, eth_txbuffer, eth_txbuffer_len-1); // XXX FIXME software or gateware? eth_write_tap(s, s->eth_txbuffer, s->eth_txbuffer_len-1); // XXX FIXME software or gateware?
eth_txbuffer_len = 0; s->eth_txbuffer_len = 0;
} }
} }
eth_last_source_stb = ETH_SOURCE_STB; s->eth_last_source_stb = ETH_SOURCE_STB;
/* tap --> fpga */ /* tap --> fpga */
if (eth_rxbuffer_len == 0) { if (s->eth_rxbuffer_len == 0) {
ETH_SINK_STB = 0; ETH_SINK_STB = 0;
eth_rxbuffer_pos = 0; s->eth_rxbuffer_pos = 0;
eth_rxbuffer_len = eth_read_tap(eth, eth_rxbuffer); s->eth_rxbuffer_len = eth_read_tap(s, s->eth_rxbuffer);
} else { } else {
if (eth_rxbuffer_pos < MAX(eth_rxbuffer_len, 60)) { if (s->eth_rxbuffer_pos < MAX(s->eth_rxbuffer_len, 60)) {
ETH_SINK_STB = 1; ETH_SINK_STB = 1;
ETH_SINK_DATA = eth_rxbuffer[eth_rxbuffer_pos]; ETH_SINK_DATA = s->eth_rxbuffer[s->eth_rxbuffer_pos];
eth_rxbuffer_pos++; s->eth_rxbuffer_pos++;
} else { } else {
ETH_SINK_STB = 0; ETH_SINK_STB = 0;
eth_rxbuffer_len = 0; s->eth_rxbuffer_len = 0;
memset(eth_rxbuffer, 0, 1532); memset(s->eth_rxbuffer, 0, 1532);
} }
} }
} }
@ -275,23 +287,21 @@ int main(int argc, char **argv, char **env)
struct sim s; struct sim s;
sim_init(&s); sim_init(&s);
#ifdef ETH_SOURCE_STB #ifdef WITH_ETH
struct eth_device eth; eth_init(&s, "/dev/net/tap0", "tap0");
char dev[] = "/dev/net/tap0"; eth_open(&s);
char tap[] = "tap0";
eth.dev = dev;
eth.tap = tap;
eth_open(&eth);
#endif #endif
s.run = true; s.run = true;
while(s.run) { while(s.run) {
sim_tick(&s); sim_tick(&s);
if (SYS_CLK) { if (SYS_CLK) {
#ifdef WITH_SERIAL
if (console_service(&s) != 0) if (console_service(&s) != 0)
s.run = false; s.run = false;
#ifdef ETH_SOURCE_STB #endif
ethernet_service(&eth); #ifdef WITH_ETH
ethernet_service(&s);
#endif #endif
} }
} }