kernel/fiasco/src/kern/sparc/cpu-sparc.cpp

   1 INTERFACE [sparc]:
   2
   3 #include "per_cpu_data.h"
   4 #include "types.h"
   5
   6 EXTENSION class Cpu
   7 {
   8 public:
   9   void init(bool is_boot_cpu = false);
  10   static void early_init();
  11
  12   static Per_cpu<Cpu> cpus;
  13   static Cpu *boot_cpu() { return _boot_cpu; }
  14
  15   Cpu(unsigned cpu) { set_id(cpu); }
  16
  17 private:
  18   static Cpu *_boot_cpu;
  19   unsigned _phys_id;
  20   static unsigned long _ns_per_cycle;
  21
  22 };
  23
  24 namespace Segment
  25 {
  26   enum Attribs_enum
  27   {
  28     Ks = 1UL << 30,
  29     Kp = 1UL << 29,
  30     N  = 1UL << 28,
  31     Default_attribs = Kp //Ks | Kp,
  32   };
  33 };
  34 //------------------------------------------------------------------------------
  35 IMPLEMENTATION [sparc]:
  36
  37 #include "panic.h"
  38 #include "boot_info.h"
  39 #include "psr.h"
  40
  41 #include <cstdio>
  42
  43 DEFINE_PER_CPU Per_cpu<Cpu> Cpu::cpus(true);
  44 Cpu *Cpu::_boot_cpu;
  45 unsigned long Cpu::_ns_per_cycle;
  46
  47 IMPLEMENT
  48 void
  49 Cpu::init(bool is_boot_cpu)
  50 {
  51   if (is_boot_cpu)
  52     {
  53       _boot_cpu = this;
  54       set_online(1);
  55     }
  56   _phys_id = 0; //Proc::cpu_id();
  57   _ns_per_cycle = 0; //1000000000 / Boot_info::get_time_base();
  58   //printf("Timebase: %lu\n", Boot_info::get_time_base());
  59 }
  60
  61 PUBLIC inline
  62 unsigned
  63 Cpu::phys_id() const
  64 { return _phys_id; }
  65
  66 IMPLEMENT
  67 void
  68 Cpu::early_init()
  69 {
  70 }
  71
  72 PUBLIC static inline
  73 Mword
  74 Cpu::read_vsid(unsigned sr = 0)
  75 {
  76   Mword vsid;
  77   (void)sr;
  78
  79   return (vsid & 0xffffff);
  80 }
  81
  82 /* set segment register 0-15 */
  83 PUBLIC static inline //NEEDS["paging.h"]
  84 void
  85 Cpu::set_vsid(Mword vsid)
  86 {
  87   vsid |= Segment::Default_attribs;
  88 }
  89
  90 PUBLIC static inline
  91 Mword
  92 Cpu::stack_align(Mword stack)
  93 { return stack & ~0xf; }
  94
  95 PUBLIC static inline
  96 bool
  97 Cpu::have_superpages()
  98 { return true; }
  99
 100 //------------------------------------------------------------------------------
 101 /* Time functions */
 102
 103 /**
 104  * Read time base registers
 105  */
 106 PUBLIC static inline
 107 Unsigned64
 108 Cpu::rdtsc()
 109 {
 110   Unsigned32 tb_upper, tb_lower;
 111   Unsigned64 tb;
 112   tb = tb_upper;
 113   return (tb << 32) | tb_lower;
 114 }
 115
 116 PUBLIC static inline
 117 void
 118 Cpu::busy_wait_ns(Unsigned64 ns)
 119 {
 120   Unsigned64 stop = rdtsc() + ns_to_tsc(ns);
 121
 122   while(rdtsc() <  stop)
 123     ;
 124 }
 125
 126 PUBLIC static inline
 127 Unsigned64
 128 Cpu::ns_to_tsc(Unsigned64 ns)
 129 {
 130   return ns / _ns_per_cycle;
 131 }
 132
 133 PUBLIC static inline
 134 Unsigned64
 135 Cpu::tsc_to_ns(Unsigned64 tsc)
 136 {
 137   return tsc * _ns_per_cycle;
 138 }
 139
 140 PUBLIC static inline
 141 Unsigned32
 142 Cpu::get_scaler_tsc_to_ns()
 143 { return 0; }
 144
 145 PUBLIC static inline
 146 Unsigned32
 147 Cpu::get_scaler_tsc_to_us()
 148 { return 0; }
 149
 150 PUBLIC static inline
 151 Unsigned32
 152 Cpu::get_scaler_ns_to_tsc()
 153 { return 0; }
 154
 155 PUBLIC static inline
 156 bool
 157 Cpu::tsc()
 158 { return 0; }
 159
 160 //------------------------------------------------------------------------------
 161 /* Unimplemented */
 162
 163 PUBLIC static inline
 164 void
 165 Cpu::debugctl_enable()
 166 {}
 167
 168 PUBLIC static inline
 169 void
 170 Cpu::debugctl_disable()
 171 {}
 172