openwrt/target/linux/linux-2.4/patches/brcm/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 15:21:17.890005500 +0100
   4 @@ -151,6 +151,20 @@
   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 +extern __u64 get_tscll(void)
  14 +{
  15 +       __u32 c = read_c0_count();
  16 +       __u64 h = (__u64) timerhi;
  17 +       h += (c < timerlo);
  18 +       h <<= 32;
  19 +       h += c;
  20 +       return h;
  21 +}
  22
  23  /*
  24   * timeofday services, for syscalls.
  25 @@ -761,3 +775,5 @@
  26  EXPORT_SYMBOL(to_tm);
  27  EXPORT_SYMBOL(rtc_set_time);
  28  EXPORT_SYMBOL(rtc_get_time);
  29 +EXPORT_SYMBOL(get_htscl);
  30 +EXPORT_SYMBOL(get_tscll);
  31 diff -urN linux.old/include/asm-mips/timex.h linux.dev/include/asm-mips/timex.h
  32 --- linux.old/include/asm-mips/timex.h  2005-11-14 11:06:38.685263500 +0100
  33 +++ linux.dev/include/asm-mips/timex.h  2005-11-14 11:02:21.069163500 +0100
  34 @@ -31,6 +31,19 @@
  35         return read_c0_count();
  36  }
  37
  38 +extern __u32 get_htscl(void);
  39 +extern __u64 get_tscll(void);
  40 +
  41 +#define rdtsc(low, high) \
  42 +               high = get_htscl(); \
  43 +               low = read_c0_count();
  44 +
  45 +#define rdtscl(low) \
  46 +               low = read_c0_count();
  47 +
  48 +#define rdtscll(val) \
  49 +               val = get_tscll();
  50 +
  51  #define vxtime_lock()          do {} while (0)
  52  #define vxtime_unlock()                do {} while (0)
  53
  54 diff -urN linux.old/include/net/pkt_sched.h linux.dev/include/net/pkt_sched.h
  55 --- linux.old/include/net/pkt_sched.h   2005-11-14 11:06:38.709265000 +0100
  56 +++ linux.dev/include/net/pkt_sched.h   2005-11-14 11:02:21.069163500 +0100
  57 @@ -5,7 +5,11 @@
  58  #define PSCHED_JIFFIES                 2
  59  #define PSCHED_CPU             3
  60
  61 +#ifdef __mips__
  62 +#define PSCHED_CLOCK_SOURCE    PSCHED_CPU
  63 +#else
  64  #define PSCHED_CLOCK_SOURCE    PSCHED_JIFFIES
  65 +#endif
  66
  67  #include <linux/config.h>
  68  #include <linux/types.h>
  69 @@ -271,7 +275,7 @@
  70  #define PSCHED_US2JIFFIE(delay) (((delay)+psched_clock_per_hz-1)/psched_clock_per_hz)
  71  #define PSCHED_JIFFIE2US(delay) ((delay)*psched_clock_per_hz)
  72
  73 -#ifdef CONFIG_X86_TSC
  74 +#if defined(CONFIG_X86_TSC) || defined(__mips__)
  75
  76  #define PSCHED_GET_TIME(stamp) \
  77  ({ u64 __cur; \