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/////////////////////////////////////////////////////////////////////////
// $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; }
};
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