kernel/fiasco/src/kern/app_cpu_thread.cpp

   1 INTERFACE [mp]:
   2
   3 #include "kernel_thread.h"
   4
   5 class App_cpu_thread : public Kernel_thread
   6 {
   7 private:
   8   void  bootstrap()             asm ("call_ap_bootstrap") FIASCO_FASTCALL;
   9 };
  10
  11 IMPLEMENTATION [mp]:
  12
  13 #include <cstdlib>
  14 #include <cstdio>
  15
  16 #include "config.h"
  17 #include "delayloop.h"
  18 #include "fpu.h"
  19 #include "globals.h"
  20 #include "helping_lock.h"
  21 #include "kernel_task.h"
  22 #include "processor.h"
  23 #include "task.h"
  24 #include "thread.h"
  25 #include "thread_state.h"
  26 #include "timer.h"
  27 #include "vmem_alloc.h"
  28 #include "spin_lock.h"
  29
  30
  31 PUBLIC inline
  32 Mword *
  33 App_cpu_thread::init_stack()
  34 {
  35   return _kernel_sp;
  36 }
  37
  38 // the kernel bootstrap routine
  39 IMPLEMENT
  40 void
  41 App_cpu_thread::bootstrap()
  42 {
  43   extern Spin_lock _tramp_mp_spinlock;
  44
  45   state_change_dirty (0, Thread_ready);         // Set myself ready
  46
  47   // Setup initial timeslice
  48   set_current_sched (sched());
  49
  50   Fpu::init(cpu());
  51
  52   // initialize the current_mem_space function to point to the kernel space
  53   Kernel_task::kernel_task()->mem_space()->make_current();
  54
  55   Cpu::cpus.cpu(current_cpu()).set_online(1);
  56
  57   _tramp_mp_spinlock.set(1);
  58
  59   kernel_context(cpu(), this);
  60   Sched_context::rq(cpu()).set_idle(this->sched());
  61
  62   Timer::enable();
  63
  64   Per_cpu_data::run_late_ctors(cpu());
  65
  66   cpu_lock.clear();
  67
  68   printf("CPU[%u]: goes to idle loop\n", cpu());
  69
  70   do_app_idle();
  71 }
  72
  73 // ------------------------------------------------------------------------
  74 IMPLEMENTATION [mp && !kernel_can_exit]:
  75
  76 PRIVATE inline
  77 void
  78 App_cpu_thread::do_app_idle()
  79 {
  80   while (1)
  81     idle_op();
  82 }
  83
  84 // ------------------------------------------------------------------------
  85 IMPLEMENTATION [mp && kernel_can_exit]:
  86
  87 PRIVATE inline
  88 void
  89 App_cpu_thread::do_app_idle()
  90 {
  91   while (running)
  92     {
  93       Mem::rmb();
  94       idle_op();
  95     }
  96
  97   // Boost this thread's priority to the maximum. Since this thread tears down
  98   // all other threads, we want it to run whenever possible to advance as fast
  99   // as we can.
 100   ready_dequeue();
 101   sched()->set_prio(255);
 102   ready_enqueue();
 103   Proc::cli();
 104   while(1)
 105     Proc::halt();
 106 }