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Diffstat (limited to 'lib_sparc/time.c')
-rw-r--r-- | lib_sparc/time.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/lib_sparc/time.c b/lib_sparc/time.c new file mode 100644 index 00000000000..433f3eb5a0d --- /dev/null +++ b/lib_sparc/time.c @@ -0,0 +1,78 @@ +/* + * (C) Copyright 2000, 2001 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2007 + * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> + +/* Implemented by SPARC CPUs */ +extern void cpu_wait_ticks(unsigned long ticks); +extern unsigned long cpu_usec2ticks(unsigned long usec); +extern unsigned long cpu_ticks2usec(unsigned long ticks); + +/* ------------------------------------------------------------------------- */ + +void wait_ticks(unsigned long ticks) +{ + cpu_wait_ticks(ticks); +} + +/* + * This function is intended for SHORT delays only. + */ +unsigned long usec2ticks(unsigned long usec) +{ + return cpu_usec2ticks(usec); +} + +/* ------------------------------------------------------------------------- */ + +/* + * We implement the delay by converting the delay (the number of + * microseconds to wait) into a number of time base ticks; then we + * watch the time base until it has incremented by that amount. + */ +void udelay(unsigned long usec) +{ + ulong ticks = usec2ticks(usec); + + wait_ticks(ticks); +} + +/* ------------------------------------------------------------------------- */ + +unsigned long ticks2usec(unsigned long ticks) +{ + return cpu_ticks2usec(ticks); +} + +/* ------------------------------------------------------------------------- */ + +int init_timebase(void) +{ + + return (0); +} + +/* ------------------------------------------------------------------------- */ |