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/* This file is part of test microkernel for OpenRISC 1000. */
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/* This file is part of test microkernel for OpenRISC 1000. */
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/* (C) 2001 Simon Srot, srot@opencores.org */
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/* (C) 2001 Simon Srot, srot@opencores.org */
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#include "spr_defs.h"
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#include "spr_defs.h"
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#include "support.h"
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#include "support.h"
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/* Tick timer period */
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/* Tick timer period */
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unsigned long tick_period;
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unsigned long tick_period;
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/* Inform of tick interrupt */
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/* Inform of tick interrupt */
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void (*tick_inf)();
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void (*tick_inf)();
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/* Tick interrupt routine */
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/* Tick interrupt routine */
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void tick_int()
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void tick_int()
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{
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{
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/* Call inf routine */
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/* Call inf routine */
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(*tick_inf)();
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(*tick_inf)();
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/* Set new counter period iand clear inet pending bit */
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/* Set new counter period iand clear inet pending bit */
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mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | (tick_period & SPR_TTMR_PERIOD));
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mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | (tick_period & SPR_TTMR_PERIOD));
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}
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}
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/* Initialize routine */
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/* Initialize routine */
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int tick_init(unsigned long period, void (* inf)())
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int tick_init(unsigned long period, void (* inf)())
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{
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{
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/* Save tick timer period and inform routine */
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/* Save tick timer period and inform routine */
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tick_period = period;
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tick_period = period;
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tick_inf = inf;
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tick_inf = inf;
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/* Set counter period, enable timer and interrupt */
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/* Set counter period, enable timer and interrupt */
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mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | (period & SPR_TTMR_PERIOD));
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mtspr(SPR_TTMR, SPR_TTMR_IE | SPR_TTMR_RT | (period & SPR_TTMR_PERIOD));
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return 0;
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return 0;
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}
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}
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