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sh: Update sh2/sh2a timer

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Renesas SH2/SH2A timer broken.
This patch fix timer function.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Nobuhiro Iwamatsu 2008-12-09 11:32:46 +09:00 committed by Nobuhiro Iwamatsu
parent a319f14962
commit d8bbc51c7b
1 changed files with 11 additions and 5 deletions
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16
lib_sh/time_sh2.c
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@ -65,8 +65,8 @@ unsigned long long get_ticks(void)
return cmt0_timer;
}
static vu_long cmcnt;
ulong get_timer(ulong base)
static vu_long cmcnt = 0;
static unsigned long get_usec (void)
{
ulong data = readw(CMCNT_0);
@ -81,7 +81,13 @@ ulong get_timer(ulong base)
cmt0_timer += cmcnt;
cmcnt = data;
return cmt0_timer - base;
return cmt0_timer;
}
/* return msec */
ulong get_timer(ulong base)
{
return (get_usec()/1000) - base;
}
void set_timer(ulong t)
@ -99,9 +105,9 @@ void reset_timer(void)
void udelay(unsigned long usec)
{
unsigned int start = get_timer(0);
unsigned long end = get_usec() + usec;
while (get_timer((ulong) start) < (usec * (CONFIG_SYS_HZ / 1000000)))
while (get_usec() < end)
continue;
}