#define IO_APIC_BASE 0xFEC00000 // Default phys addr of IO APIC #define IOAPIC_WINDOW 0x10 // Window register offset // Constants relating to APIC ID registers #define APIC_ID_MASK 0xff000000 #define APIC_ID_SHIFT 24 #define APIC_ID_CLUSTER 0xf0 #define APIC_ID_CLUSTER_ID 0x0f #define APIC_MAX_CLUSTER 0xe #define APIC_MAX_INTRACLUSTER_ID 3 #define APIC_ID_CLUSTER_SHIFT 4 // Fields in VER #define APIC_VER_VERSION 0x000000ff #define APIC_VER_MAXLVT 0x00ff0000 #define MAXLVTSHIFT 16 // Indexes into IO APIC #define IOAPIC_ID 0x00 #define IOAPIC_VER 0x01 #define IOAPIC_ARB 0x02 #define IOAPIC_REDTBL 0x10 #define IOAPIC_REDTBL0 IOAPIC_REDTBL #define IOAPIC_REDTBL1 (IOAPIC_REDTBL+0x02) #define IOAPIC_REDTBL2 (IOAPIC_REDTBL+0x04) #define IOAPIC_REDTBL3 (IOAPIC_REDTBL+0x06) #define IOAPIC_REDTBL4 (IOAPIC_REDTBL+0x08) #define IOAPIC_REDTBL5 (IOAPIC_REDTBL+0x0a) #define IOAPIC_REDTBL6 (IOAPIC_REDTBL+0x0c) #define IOAPIC_REDTBL7 (IOAPIC_REDTBL+0x0e) #define IOAPIC_REDTBL8 (IOAPIC_REDTBL+0x10) #define IOAPIC_REDTBL9 (IOAPIC_REDTBL+0x12) #define IOAPIC_REDTBL10 (IOAPIC_REDTBL+0x14) #define IOAPIC_REDTBL11 (IOAPIC_REDTBL+0x16) #define IOAPIC_REDTBL12 (IOAPIC_REDTBL+0x18) #define IOAPIC_REDTBL13 (IOAPIC_REDTBL+0x1a) #define IOAPIC_REDTBL14 (IOAPIC_REDTBL+0x1c) #define IOAPIC_REDTBL15 (IOAPIC_REDTBL+0x1e) #define IOAPIC_REDTBL16 (IOAPIC_REDTBL+0x20) #define IOAPIC_REDTBL17 (IOAPIC_REDTBL+0x22) #define IOAPIC_REDTBL18 (IOAPIC_REDTBL+0x24) #define IOAPIC_REDTBL19 (IOAPIC_REDTBL+0x26) #define IOAPIC_REDTBL20 (IOAPIC_REDTBL+0x28) #define IOAPIC_REDTBL21 (IOAPIC_REDTBL+0x2a) #define IOAPIC_REDTBL22 (IOAPIC_REDTBL+0x2c) #define IOAPIC_REDTBL23 (IOAPIC_REDTBL+0x2e) // Fields in the IO APIC's redirection table entries #define IOART_DEST APIC_ID_MASK // broadcast addr: all APICs #define IOART_RESV 0x00fe0000 // reserved #define IOART_INTMASK 0x00010000 // R/W: INTerrupt mask #define IOART_INTMCLR 0x00000000 // clear, allow INTs #define IOART_INTMSET 0x00010000 // set, inhibit INTs #define IOART_TRGRMOD 0x00008000 // R/W: trigger mode #define IOART_TRGREDG 0x00000000 // edge #define IOART_TRGRLVL 0x00008000 // level #define IOART_REM_IRR 0x00004000 // RO: remote IRR #define IOART_INTPOL 0x00002000 // R/W: INT input pin polarity #define IOART_INTAHI 0x00000000 // active high #define IOART_INTALO 0x00002000 // active low #define IOART_DELIVS 0x00001000 // RO: delivery status #define IOART_DESTMOD 0x00000800 // R/W: destination mode #define IOART_DESTPHY 0x00000000 // physical #define IOART_DESTLOG 0x00000800 // logical #define IOART_DELMOD 0x00000700 // R/W: delivery mode #define IOART_DELFIXED 0x00000000 // fixed #define IOART_DELLOPRI 0x00000100 // lowest priority #define IOART_DELSMI 0x00000200 // System Management INT #define IOART_DELRSV1 0x00000300 // reserved #define IOART_DELNMI 0x00000400 // NMI signal #define IOART_DELINIT 0x00000500 // INIT signal #define IOART_DELRSV2 0x00000600 // reserved #define IOART_DELEXINT 0x00000700 // External INTerrupt #define IOART_INTVEC 0x000000ff // R/W: INTerrupt vector field // Fields in VER #define IOART_VER_VERSION 0x000000ff #define IOART_VER_MAXREDIR 0x00ff0000 #define MAXREDIRSHIFT 16