1 files changed, 54 insertions, 0 deletions
diff --git a/tools/ioemu/iodev/ioapic.h b/tools/ioemu/iodev/ioapic.h
new file mode 100644
index 0000000000..be008f04c8
--- /dev/null
+++ b/tools/ioemu/iodev/ioapic.h
@@ -0,0 +1,54 @@
+/////////////////////////////////////////////////////////////////////////
+// $Id: ioapic.h,v 1.5 2002/10/25 11:44:40 bdenney Exp $
+/////////////////////////////////////////////////////////////////////////
+//
+extern class bx_ioapic_c bx_ioapic;
+
+#define BX_IOAPIC_VERSION_ID 0x00170011  // same version as 82093 IOAPIC
+#define BX_IOAPIC_NUM_PINS 0x18
+
+class bx_io_redirect_entry_t {
+  Bit64u value;
+public:
+  Bit32u get_even_word () { return value & 0xffffffff; }
+  Bit32u get_odd_word () { return (value>>32) & 0xffffffff; }
+  void set_even_word (Bit32u even) {
+    // keep high 32 bits of value, replace low 32
+    value = ((value >> 32) << 32) | (even & 0xffffffff);
+    parse_value ();
+  }
+  void set_odd_word (Bit32u odd) { 
+    // keep low 32 bits of value, replace high 32
+    value = (((Bit64u)odd & 0xffffffff) << 32) | (value & 0xffffffff);
+    parse_value ();
+  }
+  void parse_value ();
+  // parse_value sets the value and all the fields below.  Do not change
+  // these fields except by calling parse_value.
+  Bit8u dest, masked, trig_mode, remote_irr, polarity, delivery_status, dest_mode, delivery_mode, vector;
+  void sprintf_self (char *buf);
+};
+
+class bx_ioapic_c : public bx_generic_apic_c {
+  Bit32u ioregsel;    // selects between various registers
+  // interrupt request bitmask, not visible from the outside.  Bits in the
+  // irr are set when trigger_irq is called, and cleared when the interrupt
+  // is delivered to the processor.  If an interrupt is masked, the irr
+  // will still be set but delivery will not occur until it is unmasked.
+  // It's not clear if this is how the real device works.
+  Bit32u irr;
+public:
+  bx_io_redirect_entry_t ioredtbl[BX_IOAPIC_NUM_PINS];  // table of redirections
+  bx_ioapic_c ();
+  ~bx_ioapic_c ();
+  virtual void init ();
+  virtual void reset (unsigned type);
+  virtual void read_aligned(Bit32u address, Bit32u *data, unsigned len);
+  virtual void write(Bit32u address, Bit32u *value, unsigned len);
+  void trigger_irq (unsigned num, unsigned from);
+  void untrigger_irq (unsigned num, unsigned from);
+  void service_ioapic ();
+  virtual bx_bool match_logical_addr (Bit8u address) { return false; }
+  virtual bx_bool is_local_apic () { return false; }
+  virtual bx_apic_type_t get_type () { return APIC_TYPE_IOAPIC; }
+};