diff options
author | wdenk <wdenk> | 2003-03-27 12:09:35 +0000 |
---|---|---|
committer | wdenk <wdenk> | 2003-03-27 12:09:35 +0000 |
commit | c021880ac5837154ca51b9d84e6b75f39b64aabe (patch) | |
tree | 5f9c3cce4dd7b49e69ec5007f58c9b9a2f215c15 /lib_mips/time.c | |
parent | ac6dbb85b7f080d923013bff4e1d5267cb6f8a5a (diff) | |
download | bootable_bootloader_goldelico_gta04-c021880ac5837154ca51b9d84e6b75f39b64aabe.zip bootable_bootloader_goldelico_gta04-c021880ac5837154ca51b9d84e6b75f39b64aabe.tar.gz bootable_bootloader_goldelico_gta04-c021880ac5837154ca51b9d84e6b75f39b64aabe.tar.bz2 |
* Add support for MIPS32 4Kc CPUs
* Add support for INCA-IP Board
Diffstat (limited to 'lib_mips/time.c')
-rw-r--r-- | lib_mips/time.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/lib_mips/time.c b/lib_mips/time.c new file mode 100644 index 0000000..9e6138d --- /dev/null +++ b/lib_mips/time.c @@ -0,0 +1,103 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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> + + +static inline void mips_compare_set(u32 v) +{ + asm volatile ("mtc0 %0, $11" : : "r" (v)); +} + +static inline void mips_count_set(u32 v) +{ + asm volatile ("mtc0 %0, $9" : : "r" (v)); +} + + +static inline u32 mips_count_get(void) +{ + u32 count; + + asm volatile ("mfc0 %0, $9" : "=r" (count) :); + return count; +} + +/* + * timer without interrupts + */ + +int timer_init(void) +{ + mips_compare_set(0); + mips_count_set(0); + + return 0; +} + +void reset_timer(void) +{ + mips_count_set(0); +} + +ulong get_timer(ulong base) +{ + return mips_count_get() - base; +} + +void set_timer(ulong t) +{ + mips_count_set(t); +} + +void udelay (unsigned long usec) +{ + ulong tmo; + ulong start = get_timer(0); + + tmo = usec * CFG_HZ / 1000; + tmo /= 1000; + + while ((ulong)((mips_count_get() - start)) < tmo) + /*NOP*/; +} + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On MIPS it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return mips_count_get(); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On MIPS it returns the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + return CFG_HZ; +} + + |