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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [orpsocv2/] [sw/] [drivers/] [or1200/] [or1200-utils.c] - Rev 403
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#include "spr-defs.h" #include "or1200-utils.h" #include "board.h" // For timer rate (IN_CLK, TICKS_PER_SEC) /* For writing into SPR. */ void mtspr(unsigned long spr, unsigned long value) { asm("l.mtspr\t\t%0,%1,0": : "r" (spr), "r" (value)); } /* For reading SPR. */ unsigned long mfspr(unsigned long spr) { unsigned long value; asm("l.mfspr\t\t%0,%1,0" : "=r" (value) : "r" (spr)); return value; } /* Print out a character via simulator */ void sim_putc(unsigned char c) { asm("l.addi\tr3,%0,0": :"r" (c)); asm("l.nop %0": :"K" (NOP_PUTC)); } /* print long */ void report(unsigned long value) { asm("l.addi\tr3,%0,0": :"r" (value)); asm("l.nop %0": :"K" (NOP_REPORT)); } /* Loops/exits simulation */ void exit (int i) { asm("l.add r3,r0,%0": : "r" (i)); asm("l.nop %0": :"K" (NOP_EXIT)); while (1); } /* Tick timer variable */ unsigned long timer_ticks; /* Tick timer functions */ /* Enable tick timer and interrupt generation */ void enable_timer(void) { mtspr(SPR_SR, SPR_SR_TEE | mfspr(SPR_SR)); mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | ((IN_CLK/TICKS_PER_SEC) & SPR_TTMR_PERIOD)); } /* Disable tick timer and interrupt generation */ void disable_timer(void) { // Disable timer: clear it all! mtspr (SPR_SR, mfspr (SPR_SR) & ~SPR_SR_TEE); mtspr(SPR_TTMR, 0); } /* Timer increment - called by interrupt routine */ void timer_tick(void) { timer_ticks++; mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | ((IN_CLK/TICKS_PER_SEC) & SPR_TTMR_PERIOD)); } /* Reset tick counter */ void clear_timer_ticks(void) { timer_ticks=0; } /* Get tick counter */ unsigned long get_timer_ticks(void) { return timer_ticks; } /* Wait for 10ms */ void wait_10ms(void) { unsigned long first_time = get_timer_ticks(); while (first_time == get_timer_ticks()); }
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