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-rw-r--r--arch/mips/cavium-octeon/csrc-octeon.c63
1 files changed, 55 insertions, 8 deletions
diff --git a/arch/mips/cavium-octeon/csrc-octeon.c b/arch/mips/cavium-octeon/csrc-octeon.c
index 0bf4bbe04ae2..b6847c8e0ddd 100644
--- a/arch/mips/cavium-octeon/csrc-octeon.c
+++ b/arch/mips/cavium-octeon/csrc-octeon.c
@@ -53,7 +53,6 @@ static struct clocksource clocksource_mips = {
unsigned long long notrace sched_clock(void)
{
/* 64-bit arithmatic can overflow, so use 128-bit. */
-#if (__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 3))
u64 t1, t2, t3;
unsigned long long rv;
u64 mult = clocksource_mips.mult;
@@ -73,13 +72,6 @@ unsigned long long notrace sched_clock(void)
: [cnt] "r" (cnt), [mult] "r" (mult), [shift] "r" (shift)
: "hi", "lo");
return rv;
-#else
- /* GCC > 4.3 do it the easy way. */
- unsigned int __attribute__((mode(TI))) t;
- t = read_c0_cvmcount();
- t = t * clocksource_mips.mult;
- return (unsigned long long)(t >> clocksource_mips.shift);
-#endif
}
void __init plat_time_init(void)
@@ -88,3 +80,58 @@ void __init plat_time_init(void)
clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);
clocksource_register(&clocksource_mips);
}
+
+static u64 octeon_udelay_factor;
+static u64 octeon_ndelay_factor;
+
+void __init octeon_setup_delays(void)
+{
+ octeon_udelay_factor = octeon_get_clock_rate() / 1000000;
+ /*
+ * For __ndelay we divide by 2^16, so the factor is multiplied
+ * by the same amount.
+ */
+ octeon_ndelay_factor = (octeon_udelay_factor * 0x10000ull) / 1000ull;
+
+ preset_lpj = octeon_get_clock_rate() / HZ;
+}
+
+void __udelay(unsigned long us)
+{
+ u64 cur, end, inc;
+
+ cur = read_c0_cvmcount();
+
+ inc = us * octeon_udelay_factor;
+ end = cur + inc;
+
+ while (end > cur)
+ cur = read_c0_cvmcount();
+}
+EXPORT_SYMBOL(__udelay);
+
+void __ndelay(unsigned long ns)
+{
+ u64 cur, end, inc;
+
+ cur = read_c0_cvmcount();
+
+ inc = ((ns * octeon_ndelay_factor) >> 16);
+ end = cur + inc;
+
+ while (end > cur)
+ cur = read_c0_cvmcount();
+}
+EXPORT_SYMBOL(__ndelay);
+
+void __delay(unsigned long loops)
+{
+ u64 cur, end;
+
+ cur = read_c0_cvmcount();
+ end = cur + loops;
+
+ while (end > cur)
+ cur = read_c0_cvmcount();
+}
+EXPORT_SYMBOL(__delay);