void clock_init(void)
{
timer0_en_write(0);
timer0_load_write(0x7fffffffffffffffLL);
timer0_reload_write(0x7fffffffffffffffLL);
timer0_en_write(1);
}
void misoc_timer_initialize(void)
{
/* Clear event pending */
timer0_ev_pending_write(timer0_ev_pending_read());
/* Disable timer*/
timer0_en_write(0);
/* Setup the timer reload register to generate interrupts at the rate of
* CLOCKS_PER_SEC.
*/
timer0_reload_write(SYSTICK_RELOAD);
timer0_load_write(SYSTICK_RELOAD);
/* Enable timer */
timer0_en_write(1);
/* Attach the timer interrupt vector */
(void)irq_attach(TIMER0_INTERRUPT, up_timerisr);
/* And enable the timer interrupt */
up_enable_irq(TIMER0_INTERRUPT);
/* Enable IRQ of the timer core */
timer0_ev_enable_write(1);
}
static int test_user_abort(void)
{
char c;
printf("Automatic boot in 2 seconds...\n");
printf("Q/ESC: abort boot\n");
printf("F7: boot from serial\n");
#ifdef MINIMAC_BASE
printf("F8: boot from network\n");
#endif
timer0_en_write(0);
timer0_reload_write(0);
timer0_load_write(identifier_frequency_read()*2);
timer0_en_write(1);
timer0_update_value_write(1);
while(timer0_value_read()) {
if(readchar_nonblock()) {
c = readchar();
if((c == 'Q')||(c == '\e')) {
puts("Aborted");
return 0;
}
if(c == 0x06) {
serialboot();
return 0;
}
#ifdef MINIMAC_BASE
if(c == 0x07) {
netboot();
return 0;
}
#endif
}
timer0_update_value_write(1);
}
static int check_ack(void)
{
int recognized;
static const char str[SFL_MAGIC_LEN] = SFL_MAGIC_ACK;
timer0_en_write(0);
timer0_reload_write(0);
timer0_load_write(identifier_frequency_read()/4);
timer0_en_write(1);
timer0_update_value_write(1);
recognized = 0;
while(timer0_value_read()) {
if(uart_read_nonblock()) {
char c;
c = uart_read();
if(c == str[recognized]) {
recognized++;
if(recognized == SFL_MAGIC_LEN)
return 1;
} else {
if(c == str[0])
recognized = 1;
else
recognized = 0;
}
}
timer0_update_value_write(1);
}
return 0;
}