time.c

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#include <ppc/timebase.h>
#include <stdint.h>
 
static void tdelay(uint64_t i)
{
    uint64_t t = mftb();
    t += i;
    while (mftb() < t) asm volatile("or 31,31,31");
    asm volatile("or 2,2,2");
}
 
void udelay(int u)
{
    tdelay(((long long)PPC_TIMEBASE_FREQ) * u / 1000000);
}
 
void mdelay(int u)
{
    tdelay(((long long)PPC_TIMEBASE_FREQ) * u / 1000);
}
 
void delay(int u)
{
    tdelay(((long long)PPC_TIMEBASE_FREQ) * u);
}