target/linux/generic-2.4/patches/114-sched_use_tsc.patch

   1 Index: linux-2.4.35.4/arch/mips/kernel/time.c
   2 ===================================================================
   3 --- linux-2.4.35.4.orig/arch/mips/kernel/time.c 2007-12-15 05:19:41.138765402 +0100
   4 +++ linux-2.4.35.4/arch/mips/kernel/time.c      2007-12-15 05:19:55.011555967 +0100
   5 @@ -151,6 +151,27 @@
   6  unsigned int (*mips_hpt_read)(void);
   7  void (*mips_hpt_init)(unsigned int);
   8
   9 +extern __u32 get_htscl(void)
  10 +{
  11 +       return timerhi;
  12 +}
  13 +
  14 +static __u64 tscll_last = 0;
  15 +
  16 +extern __u64 get_tscll(void)
  17 +{
  18 +       __u64 h = (__u64) timerhi;
  19 +       __u32 c = read_c0_count();
  20 +
  21 +       h <<= 32;
  22 +       h += c;
  23 +
  24 +       while (h < tscll_last)
  25 +               h += (((__u64) 1) << 32);
  26 +
  27 +       tscll_last = h;
  28 +       return h;
  29 +}
  30
  31  /*
  32   * timeofday services, for syscalls.
  33 @@ -761,3 +782,5 @@
  34  EXPORT_SYMBOL(to_tm);
  35  EXPORT_SYMBOL(rtc_set_time);
  36  EXPORT_SYMBOL(rtc_get_time);
  37 +EXPORT_SYMBOL(get_htscl);
  38 +EXPORT_SYMBOL(get_tscll);
  39 Index: linux-2.4.35.4/include/asm-mips/timex.h
  40 ===================================================================
  41 --- linux-2.4.35.4.orig/include/asm-mips/timex.h        2007-12-15 05:19:41.146765860 +0100
  42 +++ linux-2.4.35.4/include/asm-mips/timex.h     2007-12-15 05:19:55.015556197 +0100
  43 @@ -31,6 +31,19 @@
  44         return read_c0_count();
  45  }
  46
  47 +extern __u32 get_htscl(void);
  48 +extern __u64 get_tscll(void);
  49 +
  50 +#define rdtsc(low, high) \
  51 +               high = get_htscl(); \
  52 +               low = read_c0_count();
  53 +
  54 +#define rdtscl(low) \
  55 +               low = read_c0_count();
  56 +
  57 +#define rdtscll(val) \
  58 +               val = get_tscll();
  59 +
  60  #define vxtime_lock()          do {} while (0)
  61  #define vxtime_unlock()                do {} while (0)
  62
  63 Index: linux-2.4.35.4/include/net/pkt_sched.h
  64 ===================================================================
  65 --- linux-2.4.35.4.orig/include/net/pkt_sched.h 2007-12-15 05:19:41.154766315 +0100
  66 +++ linux-2.4.35.4/include/net/pkt_sched.h      2007-12-15 05:19:55.023556652 +0100
  67 @@ -5,7 +5,11 @@
  68  #define PSCHED_JIFFIES                 2
  69  #define PSCHED_CPU             3
  70
  71 +#ifdef __mips__
  72 +#define PSCHED_CLOCK_SOURCE    PSCHED_CPU
  73 +#else
  74  #define PSCHED_CLOCK_SOURCE    PSCHED_JIFFIES
  75 +#endif
  76
  77  #include <linux/config.h>
  78  #include <linux/types.h>
  79 @@ -261,7 +265,7 @@
  80  #define PSCHED_US2JIFFIE(delay) (((delay)+psched_clock_per_hz-1)/psched_clock_per_hz)
  81  #define PSCHED_JIFFIE2US(delay) ((delay)*psched_clock_per_hz)
  82
  83 -#ifdef CONFIG_X86_TSC
  84 +#if defined(CONFIG_X86_TSC) || defined(__mips__)
  85
  86  #define PSCHED_GET_TIME(stamp) \
  87  ({ u64 __cur; \