source: freewrt/target/linux/ar7-2.4/patches/006-sched_use_tsc.patch@ a3abab6

arch/mips/kernel/time.c

@@ -151 +151 @@
 unsigned int (*mips_hpt_read)(void);
 void (*mips_hpt_init)(unsigned int);
 
+extern __u32 get_htscl(void)
+{
+        return timerhi;
+}
+
+static __u64 tscll_last = 0;
+
+extern __u64 get_tscll(void)
+{
+        __u64 h = (__u64) timerhi;
+        __u32 c = read_c0_count();
+
+        h <<= 32;
+        h += c;
+
+        while (h < tscll_last)
+                h += (((__u64) 1) << 32);
+
+        tscll_last = h;
+        return h;       
+}
 
 /*
  * timeofday services, for syscalls.
@@ -761 +782 @@
 EXPORT_SYMBOL(to_tm);
 EXPORT_SYMBOL(rtc_set_time);
 EXPORT_SYMBOL(rtc_get_time);
+EXPORT_SYMBOL(get_htscl);
+EXPORT_SYMBOL(get_tscll);

include/asm-mips/timex.h

@@ -31 +31 @@
         return read_c0_count();
 }
 
+extern __u32 get_htscl(void);
+extern __u64 get_tscll(void);
+
+#define rdtsc(low, high) \
+                high = get_htscl(); \
+                low = read_c0_count();
+
+#define rdtscl(low) \
+                low = read_c0_count();
+
+#define rdtscll(val) \
+                val = get_tscll();
+
 #define vxtime_lock()           do {} while (0)
 #define vxtime_unlock()         do {} while (0)
 

include/net/pkt_sched.h

@@ -5 +5 @@
 #define PSCHED_JIFFIES          2
 #define PSCHED_CPU              3
 
+#ifdef __mips__
+#define PSCHED_CLOCK_SOURCE     PSCHED_CPU
+#else
 #define PSCHED_CLOCK_SOURCE     PSCHED_JIFFIES
+#endif
 
 #include <linux/config.h>
 #include <linux/types.h>
@@ -271 +275 @@
 #define PSCHED_US2JIFFIE(delay) (((delay)+psched_clock_per_hz-1)/psched_clock_per_hz)
 #define PSCHED_JIFFIE2US(delay) ((delay)*psched_clock_per_hz)
 
-#ifdef CONFIG_X86_TSC
+#if defined(CONFIG_X86_TSC) || defined(__mips__)
 
 #define PSCHED_GET_TIME(stamp) \
 ({ u64 __cur; \