platform_mb.c

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/*
 * platform_mb.c
 *
 * MicroBlaze platform specific functions.
 */

#ifdef __MICROBLAZE__

#include "platform.h"
#include "platform_config.h"

#include "mb_interface.h"

#include "xparameters.h"
#include "xintc.h"
#include "xtmrctr_l.h"

void
xadapter_timer_handler(void *p)
{
	timer_callback();

	/* Load timer, clear interrupt bit */
	XTmrCtr_SetControlStatusReg(PLATFORM_TIMER_BASEADDR, 0,
			XTC_CSR_INT_OCCURED_MASK
			| XTC_CSR_LOAD_MASK);

	XTmrCtr_SetControlStatusReg(PLATFORM_TIMER_BASEADDR, 0,
			XTC_CSR_ENABLE_TMR_MASK
			| XTC_CSR_ENABLE_INT_MASK
			| XTC_CSR_AUTO_RELOAD_MASK
			| XTC_CSR_DOWN_COUNT_MASK);

	XIntc_AckIntr(XPAR_INTC_0_BASEADDR, PLATFORM_TIMER_INTERRUPT_MASK);
}

#define MHZ (66)
#define TIMER_TLR (25000000*((float)MHZ/100))

void
platform_setup_timer()
{
	/* set the number of cycles the timer counts before interrupting */
	/* 100 Mhz clock => .01us for 1 clk tick. For 100ms, 10000000 clk ticks need to elapse  */
	XTmrCtr_SetLoadReg(PLATFORM_TIMER_BASEADDR, 0, TIMER_TLR);

	/* reset the timers, and clear interrupts */
	XTmrCtr_SetControlStatusReg(PLATFORM_TIMER_BASEADDR, 0, XTC_CSR_INT_OCCURED_MASK | XTC_CSR_LOAD_MASK );

	/* start the timers */
	XTmrCtr_SetControlStatusReg(PLATFORM_TIMER_BASEADDR, 0,
			XTC_CSR_ENABLE_TMR_MASK | XTC_CSR_ENABLE_INT_MASK
			| XTC_CSR_AUTO_RELOAD_MASK | XTC_CSR_DOWN_COUNT_MASK);

	/* Register Timer handler */
	XIntc_RegisterHandler(XPAR_INTC_0_BASEADDR,
			PLATFORM_TIMER_INTERRUPT_INTR,
			(XInterruptHandler)xadapter_timer_handler,
			0);
}

void platform_enable_interrupts()
{
	microblaze_enable_interrupts();
}
#endif