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(Cpu_number cpu) { set_id(cpu); }
  16
  17 private:
  18   static Cpu *_boot_cpu;
  19   Cpu_phys_id _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 "psr.h"
  39
  40 #include <cstdio>
  41
  42 DEFINE_PER_CPU Per_cpu<Cpu> Cpu::cpus(Per_cpu_data::Cpu_num);
  43 Cpu *Cpu::_boot_cpu;
  44 unsigned long Cpu::_ns_per_cycle;
  45
  46 PUBLIC static inline unsigned Cpu::phys_bits() { return 32; }
  47
  48 IMPLEMENT
  49 void
  50 Cpu::init(bool is_boot_cpu)
  51 {
  52   if (is_boot_cpu)
  53     {
  54       _boot_cpu = this;
  55       set_present(1);
  56       set_online(1);
  57     }
  58   _phys_id = Cpu_phys_id(0); //Proc::cpu_id();
  59   _ns_per_cycle = 0; //1000000000 / Boot_info::get_time_base();
  60   //printf("Timebase: %lu\n", Boot_info::get_time_base());
  61 }
  62
  63 PUBLIC inline
  64 Cpu_phys_id
  65 Cpu::phys_id() const
  66 { return _phys_id; }
  67
  68 IMPLEMENT
  69 void
  70 Cpu::early_init()
  71 {
  72 }
  73
  74 PUBLIC static inline
  75 Mword
  76 Cpu::read_vsid(unsigned sr = 0)
  77 {
  78   Mword vsid;
  79   (void)sr;
  80
  81   return (vsid & 0xffffff);
  82 }
  83
  84 /* set segment register 0-15 */
  85 PUBLIC static inline //NEEDS["paging.h"]
  86 void
  87 Cpu::set_vsid(Mword vsid)
  88 {
  89   vsid |= Segment::Default_attribs;
  90 }
  91
  92 PUBLIC static inline
  93 Mword
  94 Cpu::stack_align(Mword stack)
  95 { return stack & ~0xf; }
  96
  97 PUBLIC static inline
  98 bool
  99 Cpu::have_superpages()
 100 { return true; }
 101
 102 //------------------------------------------------------------------------------
 103 /* Time functions */
 104
 105 /**
 106  * Read time base registers
 107  */
 108 PUBLIC static inline
 109 Unsigned64
 110 Cpu::rdtsc()
 111 {
 112   Unsigned32 tb_upper, tb_lower;
 113   Unsigned64 tb;
 114   tb = tb_upper;
 115   return (tb << 32) | tb_lower;
 116 }
 117
 118 PUBLIC static inline
 119 void
 120 Cpu::busy_wait_ns(Unsigned64 ns)
 121 {
 122   Unsigned64 stop = rdtsc() + ns_to_tsc(ns);
 123
 124   while(rdtsc() <  stop)
 125     ;
 126 }
 127
 128 PUBLIC static inline
 129 Unsigned64
 130 Cpu::ns_to_tsc(Unsigned64 ns)
 131 {
 132   return ns / _ns_per_cycle;
 133 }
 134
 135 PUBLIC static inline
 136 Unsigned64
 137 Cpu::tsc_to_ns(Unsigned64 tsc)
 138 {
 139   return tsc * _ns_per_cycle;
 140 }
 141
 142 PUBLIC static inline
 143 Unsigned32
 144 Cpu::get_scaler_tsc_to_ns()
 145 { return 0; }
 146
 147 PUBLIC static inline
 148 Unsigned32
 149 Cpu::get_scaler_tsc_to_us()
 150 { return 0; }
 151
 152 PUBLIC static inline
 153 Unsigned32
 154 Cpu::get_scaler_ns_to_tsc()
 155 { return 0; }
 156
 157 PUBLIC static inline
 158 bool
 159 Cpu::tsc()
 160 { return 0; }
 161
 162 //------------------------------------------------------------------------------
 163 /* Unimplemented */
 164
 165 PUBLIC static inline
 166 void
 167 Cpu::debugctl_enable()
 168 {}
 169
 170 PUBLIC static inline
 171 void
 172 Cpu::debugctl_disable()
 173 {}
 174