kernel/fiasco/src/kern/ia32/ipi-ia32.cpp

   1 INTERFACE [mp]:
   2
   3 #include "per_cpu_data.h"
   4
   5 EXTENSION class Ipi
   6 {
   7 private:
   8   Unsigned32 _apic_id;
   9   unsigned _count;
  10
  11 public:
  12   enum Message
  13   {
  14     Request        = APIC_IRQ_BASE - 1,
  15     Global_request = APIC_IRQ_BASE + 2,
  16     Debug          = APIC_IRQ_BASE - 2
  17   };
  18 };
  19
  20
  21 //---------------------------------------------------------------------------
  22 IMPLEMENTATION[mp]:
  23
  24 #include <cstdio>
  25 #include "apic.h"
  26 #include "kmem.h"
  27
  28 PUBLIC inline
  29 Ipi::Ipi() : _apic_id(~0)
  30 {}
  31
  32
  33 /**
  34  * \param cpu the logical CPU number of the current CPU.
  35  * \pre cpu == current CPU.
  36  */
  37 IMPLEMENT static inline NEEDS["apic.h"]
  38 void
  39 Ipi::init(unsigned cpu)
  40 {
  41   _ipi.cpu(cpu)._apic_id = Apic::get_id();
  42 }
  43
  44
  45 PUBLIC static inline
  46 void
  47 Ipi::ipi_call_debug_arch()
  48 {
  49   //ipi_call_spin(); // debug
  50 }
  51
  52 PUBLIC static inline NEEDS["apic.h"]
  53 void
  54 Ipi::eoi(Message, unsigned cpu)
  55 {
  56   Apic::mp_ipi_ack();
  57   stat_received(cpu);
  58 }
  59
  60 PUBLIC static inline NEEDS["apic.h"]
  61 void
  62 Ipi::send(Message m, unsigned from_cpu, unsigned to_cpu)
  63 {
  64   Apic::mp_send_ipi(_ipi.cpu(to_cpu)._apic_id, (Unsigned8)m);
  65   stat_sent(from_cpu);
  66 }
  67
  68 PUBLIC static inline NEEDS["apic.h"]
  69 void
  70 Ipi::bcast(Message m, unsigned from_cpu)
  71 {
  72   (void)from_cpu;
  73   Apic::mp_send_ipi(Apic::APIC_IPI_OTHERS, (Unsigned8)m);
  74 }
  75
  76 #if defined(CONFIG_IRQ_SPINNER)
  77
  78 // debug
  79 PRIVATE static
  80 void Ipi::ipi_call_spin()
  81 {
  82   unsigned cpu;
  83   Ipi *ipi = 0;
  84   for (cpu = 0; cpu < Config::Max_num_cpus; ++cpu)
  85     {
  86       if (!Per_cpu_data::valid(cpu))
  87         continue;
  88
  89       if (_ipi.cpu(cpu)._apic_id == Apic::get_id())
  90         {
  91           ipi = &_ipi.cpu(cpu);
  92           break;
  93         }
  94     }
  95
  96   if (!ipi)
  97     return;
  98
  99   *(unsigned char*)(Mem_layout::Adap_vram_cga_beg + 22*160 + cpu*+2)
 100     = '0' + (ipi->_count++ % 10);
 101 }
 102 #endif
 103