30 lines
754 B
C
30 lines
754 B
C
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#include <kernel/hardware/tmu.h>
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#include <kernel/devices/timer.h>
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void timer_handler(void)
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{
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extern struct timer_cache_s timercache[TIMER_NUMBER];
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uint32_t intevt;
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int timer_ID;
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// Get timer ID
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// @note: tricky way to get timer ID
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// TODO: find better way !
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intevt = *(uint32_t*)0xff000028;
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timer_ID = (intevt - 0x400) >> 9;
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// Stop timer flag and clear interrupt flags.
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SH7305_TMU.TSTR.BYTE &= ~(1 << timer_ID);
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SH7305_TMU.TIMER[timer_ID].TCR.UNF = 0;
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// Execute callback if possible.
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if (timercache[timer_ID].status != TIMER_UNUSED &&
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timercache[timer_ID].callback != NULL)
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{
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((void (*)(volatile void *))timercache[timer_ID].callback)(timercache[timer_ID].arg);
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}
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// Re-start timer.
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SH7305_TMU.TSTR.BYTE |= 1 << timer_ID;
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}
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