u64 timer_us(u64 base)
{
static u64 hz;
// Only check timer_hz once. Assume it doesn't change.
if (hz == 0) {
hz = timer_hz();
if (hz < 1000000) {
printf("Timer frequency %lld is too low, "
"must be at least 1MHz.\n", hz);
halt();
}
}
return (1000000 * timer_raw_value()) / hz - base;
}
static void update_clock(void)
{
u64 delta = timer_raw_value() - clock.ticks;
int secs;
static uint64_t ticks_per_sec = 0;
static uint64_t ticks_per_usec = 0;
if (!ticks_per_sec) {
ticks_per_sec = timer_hz();
ticks_per_usec = timer_hz() / 1000000;
}
clock.ticks += delta;
secs = (int) (delta / ticks_per_sec);
clock.secs += secs;
delta -= (secs * ticks_per_sec);
clock.usecs += (int)(delta / ticks_per_usec);
if (clock.usecs > 1000000) {
clock.usecs -= 1000000;
clock.secs++;
}
}
static inline void _delay(uint64_t delta)
{
uint64_t start = timer_raw_value();
while (timer_raw_value() - start < delta) ;
}
static void gettimeofday_init(void)
{
/* Record the number of ticks */
clock.ticks = timer_raw_value();
}
void timer_monotonic_get(struct mono_time *mt)
{
mono_time_set_usecs(mt, timer_raw_value() / CLOCKS_PER_USEC);
}
void timer_monotonic_get(struct mono_time *mt)
{
mono_time_set_usecs(mt, timer_raw_value() / clocks_per_usec);
}
int main(void)
{
NetbootParam *param;
// Initialize some consoles.
serial_console_init();
cbmem_console_init();
video_console_init();
input_init();
printf("\n\nStarting netboot on " CONFIG_BOARD "...\n");
timestamp_init();
if (run_init_funcs())
halt();
// Make sure graphics are available if they aren't already.
enable_graphics();
dc_usb_initialize();
srand(timer_raw_value());
printf("Looking for network device... ");
while (!net_get_device())
usb_poll();
printf("done.\n");
printf("Waiting for link... ");
int ready = 0;
while (!ready) {
if (net_ready(&ready))
halt();
}
mdelay(200); // some dongles need more time than they think
printf("done.\n");
// Start up the network stack.
uip_init();
// Plug in the MAC address.
const uip_eth_addr *mac_addr = net_get_mac();
if (!mac_addr)
halt();
printf("MAC: ");
print_mac_addr(mac_addr);
printf("\n");
uip_setethaddr(*mac_addr);
// Find out who we are.
uip_ipaddr_t my_ip, next_ip, server_ip;
const char *dhcp_bootfile;
while (dhcp_request(&next_ip, &server_ip, &dhcp_bootfile))
printf("Dhcp failed, retrying.\n");
printf("My ip is ");
uip_gethostaddr(&my_ip);
print_ip_addr(&my_ip);
printf("\nThe DHCP server ip is ");
print_ip_addr(&server_ip);
printf("\n");
// Retrieve settings from the shared data area.
FmapArea shared_data;
if (fmap_find_area("SHARED_DATA", &shared_data)) {
printf("Couldn't find the shared data area.\n");
halt();
}
void *data = flash_read(shared_data.offset, shared_data.size);
netboot_params_init(data, shared_data.size);
// Get TFTP server IP and file name from params with DHCP as fallback
uip_ipaddr_t *tftp_ip = NULL;
param = netboot_params_val(NetbootParamIdTftpServerIp);
if (param->data && param->size >= sizeof(uip_ipaddr_t)) {
tftp_ip = (uip_ipaddr_t *)param->data;
printf("TFTP server IP set from firmware parameters: ");
} else {
tftp_ip = &next_ip;
printf("TFTP server IP supplied by DHCP server: ");
}
print_ip_addr(tftp_ip);
printf("\n");
const char *bootfile = NULL;
param = netboot_params_val(NetbootParamIdBootfile);
if (param->data && param->size > 0 && strnlen((const char *)param->data,
param->size) < param->size) {
bootfile = (const char *)param->data;
printf("Bootfile set from firmware parameters: %s\n", bootfile);
} else {
bootfile = dhcp_bootfile;
printf("Bootfile supplied by DHCP server: %s\n", bootfile);
}
// Download the bootfile.
uint32_t size;
if (tftp_read(payload, tftp_ip, bootfile, &size, MaxPayloadSize)) {
printf("Tftp failed.\n");
if (dhcp_release(server_ip))
printf("Dhcp release failed.\n");
halt();
}
printf("The bootfile was %d bytes long.\n", size);
// Use command line from params when present (added to the default).
param = netboot_params_val(NetbootParamIdKernelArgs);
if (param->data && param->size > 0 && *(char *)param->data != '\0') {
cmd_line[sizeof(def_cmd_line) - 1] = ' ';
strncpy(&cmd_line[sizeof(def_cmd_line)], param->data,
sizeof(cmd_line) - sizeof(def_cmd_line));
printf("Command line set from firmware parameters.\n");
// Otherwise, try to fetch it dynamically as a TFTP file.
} else if (!(tftp_read(cmd_line, tftp_ip, "cmdline." CONFIG_BOARD,
&size, sizeof(cmd_line) - 1))) {
while (cmd_line[size - 1] <= ' ') // strip trailing whitespace
if (!--size) break; // and control chars (\n, \r)
cmd_line[size] = '\0';
while (size--) // replace inline control
if (cmd_line[size] < ' ') // chars with spaces
cmd_line[size] = ' ';
printf("Command line loaded dynamically from TFTP server.\n");
// If the file doesn't exist, finally fall back to built-in default.
} else {
printf("No command line from TFTP, falling back to default.\n");
}
cmd_line[sizeof(cmd_line) - 1] = '\0';
// We're done on the network, so release our IP.
if (dhcp_release(server_ip)) {
printf("Dhcp release failed.\n");
halt();
}
// Add tftp server IP into command line.
static const char def_tftp_cmdline[] = " tftpserverip=xxx.xxx.xxx.xxx";
const int tftp_cmdline_def_size = sizeof(def_tftp_cmdline) - 1;
int cmd_line_size = strlen(cmd_line);
if (cmd_line_size + tftp_cmdline_def_size >= sizeof(cmd_line)) {
printf("Out of space adding TFTP server IP to the command line.\n");
return 1;
}
sprintf(&cmd_line[cmd_line_size], " tftpserverip=%d.%d.%d.%d",
uip_ipaddr1(tftp_ip), uip_ipaddr2(tftp_ip),
uip_ipaddr3(tftp_ip), uip_ipaddr4(tftp_ip));
printf("The command line is: %s\n", cmd_line);
// Boot.
boot(payload, cmd_line, NULL, NULL);
// We should never get here.
printf("Got to the end!\n");
halt();
return 0;
}
void timer_monotonic_get(struct mono_time *mt)
{
mono_time_set_usecs(mt, timer_raw_value() / GPT_MHZ);
}