openwrt/target/linux/brcm-2.4/patches/007-sched_use_tsc.patch

   1 diff -urN linux.old/arch/mips/kernel/time.c linux.dev/arch/mips/kernel/time.c
   2 --- linux.old/arch/mips/kernel/time.c   2005-11-14 11:06:38.661262000 +0100
   3 +++ linux.dev/arch/mips/kernel/time.c   2005-11-15 20:02:50.059676750 +0100
   4 @@ -151,6 +151,27 @@
   5  unsigned int (*mips_hpt_read)(void);
   6  void (*mips_hpt_init)(unsigned int);
   7
   8 +extern __u32 get_htscl(void)
   9 +{
  10 +       return timerhi;
  11 +}
  12 +
  13 +static __u64 tscll_last = 0;
  14 +
  15 +extern __u64 get_tscll(void)
  16 +{
  17 +       __u64 h = (__u64) timerhi;
  18 +       __u32 c = read_c0_count();
  19 +
  20 +       h <<= 32;
  21 +       h += c;
  22 +
  23 +       while (h < tscll_last)
  24 +               h += (((__u64) 1) << 32);
  25 +
  26 +       tscll_last = h;
  27 +       return h;
  28 +}
  29
  30  /*
  31   * timeofday services, for syscalls.
  32 @@ -761,3 +782,5 @@
  33  EXPORT_SYMBOL(to_tm);
  34  EXPORT_SYMBOL(rtc_set_time);
  35  EXPORT_SYMBOL(rtc_get_time);
  36 +EXPORT_SYMBOL(get_htscl);
  37 +EXPORT_SYMBOL(get_tscll);
  38 diff -urN linux.old/include/asm-mips/timex.h linux.dev/include/asm-mips/timex.h
  39 --- linux.old/include/asm-mips/timex.h  2005-11-14 11:06:38.685263500 +0100
  40 +++ linux.dev/include/asm-mips/timex.h  2005-11-14 11:02:21.069163500 +0100
  41 @@ -31,6 +31,19 @@
  42         return read_c0_count();
  43  }
  44
  45 +extern __u32 get_htscl(void);
  46 +extern __u64 get_tscll(void);
  47 +
  48 +#define rdtsc(low, high) \
  49 +               high = get_htscl(); \
  50 +               low = read_c0_count();
  51 +
  52 +#define rdtscl(low) \
  53 +               low = read_c0_count();
  54 +
  55 +#define rdtscll(val) \
  56 +               val = get_tscll();
  57 +
  58  #define vxtime_lock()          do {} while (0)
  59  #define vxtime_unlock()                do {} while (0)
  60
  61 diff -urN linux.old/include/net/pkt_sched.h linux.dev/include/net/pkt_sched.h
  62 --- linux.old/include/net/pkt_sched.h   2005-11-14 11:06:38.709265000 +0100
  63 +++ linux.dev/include/net/pkt_sched.h   2005-11-14 11:02:21.069163500 +0100
  64 @@ -5,7 +5,11 @@
  65  #define PSCHED_JIFFIES                 2
  66  #define PSCHED_CPU             3
  67
  68 +#ifdef __mips__
  69 +#define PSCHED_CLOCK_SOURCE    PSCHED_CPU
  70 +#else
  71  #define PSCHED_CLOCK_SOURCE    PSCHED_JIFFIES
  72 +#endif
  73
  74  #include <linux/config.h>
  75  #include <linux/types.h>
  76 @@ -271,7 +275,7 @@
  77  #define PSCHED_US2JIFFIE(delay) (((delay)+psched_clock_per_hz-1)/psched_clock_per_hz)
  78  #define PSCHED_JIFFIE2US(delay) ((delay)*psched_clock_per_hz)
  79
  80 -#ifdef CONFIG_X86_TSC
  81 +#if defined(CONFIG_X86_TSC) || defined(__mips__)
  82
  83  #define PSCHED_GET_TIME(stamp) \
  84  ({ u64 __cur; \