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| author | Shinya Kuribayashi <skuribay@ruby.dti.ne.jp> | 2008-06-05 22:29:00 +0900 |
|---|---|---|
| committer | Shinya Kuribayashi <skuribay@ruby.dti.ne.jp> | 2008-06-05 22:29:00 +0900 |
| commit | 199e4f657c8af42efe3fb3ba1d1104eb6bb28c25 (patch) | |
| tree | c4245d2ea3700fcd86d94c6a6dfaea7dcf9dd3b6 /lib_mips/time.c | |
| parent | c7e38e413ae69120d3e51f132c7cb1d6b3514d03 (diff) | |
| download | u-boot-imx-199e4f657c8af42efe3fb3ba1d1104eb6bb28c25.zip u-boot-imx-199e4f657c8af42efe3fb3ba1d1104eb6bb28c25.tar.gz u-boot-imx-199e4f657c8af42efe3fb3ba1d1104eb6bb28c25.tar.bz2 | |
[MIPS] lib_mips/time.c: Fix udelay
What we have to do is just to wait for given micro-seconds. No need to
take into account current time, get_timer and CFG_HZ.
Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
Diffstat (limited to 'lib_mips/time.c')
| -rw-r--r-- | lib_mips/time.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/lib_mips/time.c b/lib_mips/time.c index 2c696b7..fe36530 100644 --- a/lib_mips/time.c +++ b/lib_mips/time.c @@ -51,13 +51,12 @@ void set_timer(ulong t) write_c0_count(t); } -void udelay (unsigned long usec) +void udelay(unsigned long usec) { - ulong tmo; - ulong start = get_timer(0); + unsigned int tmo; - tmo = usec * (CFG_HZ / 1000000); - while ((ulong)((read_c0_count() - start)) < tmo) + tmo = read_c0_count() + (usec * (CFG_MIPS_TIMER_FREQ / 1000000)); + while ((tmo - read_c0_count()) < 0x7fffffff) /*NOP*/; } |