xv6-cs450/ioapic.h

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#define IO_APIC_BASE 0xFEC00000 // default physical locations of an IO APIC
#define IOAPIC_WINDOW 0x10 // window register offset
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// 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
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// Fields in VER
#define APIC_VER_VERSION 0x000000ff
#define APIC_VER_MAXLVT 0x00ff0000
#define MAXLVTSHIFT 16
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// 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)
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// Fields in the IO APIC's redirection table entries
#define IOART_DEST APIC_ID_MASK // broadcast addr: all APICs
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#define IOART_RESV 0x00fe0000 // reserved
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#define IOART_INTMASK 0x00010000 // R/W: INTerrupt mask
#define IOART_INTMCLR 0x00000000 // clear, allow INTs
#define IOART_INTMSET 0x00010000 // set, inhibit INTs
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#define IOART_TRGRMOD 0x00008000 // R/W: trigger mode
#define IOART_TRGREDG 0x00000000 // edge
#define IOART_TRGRLVL 0x00008000 // level
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#define IOART_REM_IRR 0x00004000 // RO: remote IRR
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#define IOART_INTPOL 0x00002000 // R/W: INT input pin polarity
#define IOART_INTAHI 0x00000000 // active high
#define IOART_INTALO 0x00002000 // active low
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#define IOART_DELIVS 0x00001000 // RO: delivery status
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#define IOART_DESTMOD 0x00000800 // R/W: destination mode
#define IOART_DESTPHY 0x00000000 // physical
#define IOART_DESTLOG 0x00000800 // logical
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#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
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#define IOART_INTVEC 0x000000ff // R/W: INTerrupt vector field
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// Fields in VER
#define IOART_VER_VERSION 0x000000ff
#define IOART_VER_MAXREDIR 0x00ff0000
#define MAXREDIRSHIFT 16