55 lines
2.2 KiB
C++
55 lines
2.2 KiB
C++
/////////////////////////////////////////////////////////////////////////
|
|
// $Id: ioapic.h,v 1.9 2005-06-04 17:44:58 vruppert 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 (Bit32u)(value & 0xffffffff); }
|
|
Bit32u get_odd_word () { return (Bit32u)((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 raise_irq (unsigned num, unsigned from);
|
|
void lower_irq (unsigned num, unsigned from);
|
|
void service_ioapic ();
|
|
virtual bx_bool match_logical_addr (Bit8u address) { return 0; }
|
|
virtual bx_bool is_local_apic () { return 0; }
|
|
virtual bx_apic_type_t get_type () { return APIC_TYPE_IOAPIC; }
|
|
};
|