| * Precise Delay Loops for SuperH |
| * Copyright (C) 1999 Niibe Yutaka & Kaz Kojima |
| void __delay(unsigned long loops) |
| * ST40-300 appears to have an issue with this code, |
| * normally taking two cycles each loop, as with all |
| * other SH variants. If however the branch and the |
| * delay slot straddle an 8 byte boundary, this increases |
| * This align directive ensures this doesn't occur. |
| inline void __const_udelay(unsigned long xloops) |
| __asm__("dmulu.l %0, %2\n\t" |
| "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy * (HZ/4)) |
| void __udelay(unsigned long usecs) |
| __const_udelay(usecs * 0x000010c6); /* 2**32 / 1000000 */ |
| void __ndelay(unsigned long nsecs) |
| __const_udelay(nsecs * 0x00000005); |