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freebsd-dev/sys/i386/include/apic.h
Matthew Dillon cd906fe3de Optimize two cases in the MP locking code. First, it is not necessary 
to use a locked cmpexg when unlocking a lock that we already hold, since
    nobody else can touch the lock while we hold it.  Second, it is not
    necessary to use a locked cmpexg when locking a lock that we already
    hold, for the same reason.  These changes will allow MP locks to be used
    recursively without impacting performance.

    Modify two procedures that are called only by assembly and are already
    NOPROF entries to pass a critical argument in %edx instead of on the
    stack, removing a significant amount of code from the critical path
    as a consequence.

Reviewed by:	Alfred Perlstein <bright@wintelcom.net>, Peter Wemm <peter@netplex.com.au>
1999-11-19 16:49:30 +00:00

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/*
* Copyright (c) 1996, by Peter Wemm and Steve Passe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the developer may NOT be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MACHINE_APIC_H_
#define _MACHINE_APIC_H_
/*
* Local && I/O APIC definitions.
*/
/*
* Pentium P54C+ Build-in APIC
* (Advanced programmable Interrupt Controller)
*
* Base Address of Build-in APIC in memory location
* is 0xfee00000.
*
* Map of APIC REgisters:
*
* Offset (hex) Description Read/Write state
* 000 Reserved
* 010 Reserved
* 020 ID Local APIC ID R/W
* 030 VER Local APIC Version R
* 040 Reserved
* 050 Reserved
* 060 Reserved
* 070 Reserved
* 080 Task Priority Register R/W
* 090 Arbitration Priority Register R
* 0A0 Processor Priority Register R
* 0B0 EOI Register W
* 0C0 RRR Remote read R
* 0D0 Logical Destination R/W
* 0E0 Destination Format Register 0..27 R; 28..31 R/W
* 0F0 SVR Spurious Interrupt Vector Reg. 0..3 R; 4..9 R/W
* 100 ISR 000-031 R
* 110 ISR 032-063 R
* 120 ISR 064-095 R
* 130 ISR 095-128 R
* 140 ISR 128-159 R
* 150 ISR 160-191 R
* 160 ISR 192-223 R
* 170 ISR 224-255 R
* 180 TMR 000-031 R
* 190 TMR 032-063 R
* 1A0 TMR 064-095 R
* 1B0 TMR 095-128 R
* 1C0 TMR 128-159 R
* 1D0 TMR 160-191 R
* 1E0 TMR 192-223 R
* 1F0 TMR 224-255 R
* 200 IRR 000-031 R
* 210 IRR 032-063 R
* 220 IRR 064-095 R
* 230 IRR 095-128 R
* 240 IRR 128-159 R
* 250 IRR 160-191 R
* 260 IRR 192-223 R
* 270 IRR 224-255 R
* 280 Error Status Register R
* 290 Reserved
* 2A0 Reserved
* 2B0 Reserved
* 2C0 Reserved
* 2D0 Reserved
* 2E0 Reserved
* 2F0 Reserved
* 300 ICR_LOW Interrupt Command Reg. (0-31) R/W
* 310 ICR_HI Interrupt Command Reg. (32-63) R/W
* 320 Local Vector Table (Timer) R/W
* 330 Reserved
* 340 Reserved
* 350 LVT1 Local Vector Table (LINT0) R/W
* 360 LVT2 Local Vector Table (LINT1) R/W
* 370 LVT3 Local Vector Table (ERROR) R/W
* 380 Initial Count Reg. for Timer R/W
* 390 Current Count of Timer R
* 3A0 Reserved
* 3B0 Reserved
* 3C0 Reserved
* 3D0 Reserved
* 3E0 Timer Divide Configuration Reg. R/W
* 3F0 Reserved
*/
/******************************************************************************
* global defines, etc.
*/
/******************************************************************************
* LOCAL APIC structure
*/
#ifndef LOCORE
#include <sys/types.h>
#define PAD3 int : 32; int : 32; int : 32
#define PAD4 int : 32; int : 32; int : 32; int : 32
struct LAPIC {
/* reserved */ PAD4;
/* reserved */ PAD4;
u_int32_t id; PAD3;
u_int32_t version; PAD3;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
u_int32_t tpr; PAD3;
u_int32_t apr; PAD3;
u_int32_t ppr; PAD3;
u_int32_t eoi; PAD3;
/* reserved */ PAD4;
u_int32_t ldr; PAD3;
u_int32_t dfr; PAD3;
u_int32_t svr; PAD3;
u_int32_t isr0; PAD3;
u_int32_t isr1; PAD3;
u_int32_t isr2; PAD3;
u_int32_t isr3; PAD3;
u_int32_t isr4; PAD3;
u_int32_t isr5; PAD3;
u_int32_t isr6; PAD3;
u_int32_t isr7; PAD3;
u_int32_t tmr0; PAD3;
u_int32_t tmr1; PAD3;
u_int32_t tmr2; PAD3;
u_int32_t tmr3; PAD3;
u_int32_t tmr4; PAD3;
u_int32_t tmr5; PAD3;
u_int32_t tmr6; PAD3;
u_int32_t tmr7; PAD3;
u_int32_t irr0; PAD3;
u_int32_t irr1; PAD3;
u_int32_t irr2; PAD3;
u_int32_t irr3; PAD3;
u_int32_t irr4; PAD3;
u_int32_t irr5; PAD3;
u_int32_t irr6; PAD3;
u_int32_t irr7; PAD3;
u_int32_t esr; PAD3;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
u_int32_t icr_lo; PAD3;
u_int32_t icr_hi; PAD3;
u_int32_t lvt_timer; PAD3;
/* reserved */ PAD4;
u_int32_t lvt_pcint; PAD3;
u_int32_t lvt_lint0; PAD3;
u_int32_t lvt_lint1; PAD3;
u_int32_t lvt_error; PAD3;
u_int32_t icr_timer; PAD3;
u_int32_t ccr_timer; PAD3;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
/* reserved */ PAD4;
u_int32_t dcr_timer; PAD3;
/* reserved */ PAD4;
};
typedef struct LAPIC lapic_t;
/******************************************************************************
* I/O APIC structure
*/
struct IOAPIC {
u_int32_t ioregsel; PAD3;
u_int32_t iowin; PAD3;
};
typedef struct IOAPIC ioapic_t;
#undef PAD4
#undef PAD3
#endif /* !LOCORE */
/******************************************************************************
* various code 'logical' values
*/
/* default level for TPR */
#define LOPRIO_LEVEL 0x00000010 /* TPR of CPU accepting INTs */
#ifdef GRAB_LOPRIO
#define ALLHWI_LEVEL 0x00000000 /* TPR of CPU grabbing INTs */
#endif /** GRAB_LOPRIO */
/* XXX these 2 don't really belong here... */
#define COUNT_FIELD 0x00ffffff /* count portion of the lock */
#define CPU_FIELD 0xff000000 /* cpu portion of the lock */
#define FREE_LOCK 0xffffffff /* value of lock when free */
/*
* XXX This code assummes that the reserved field of the
* local APIC TPR can be written with all 0s.
* This saves quite a few memory accesses.
* If the silicon ever changes then things will break!
* It affects mplock.s, swtch.s, and possibly other files.
*/
#define CHEAP_TPR
/******************************************************************************
* LOCAL APIC defines
*/
/* default physical locations of LOCAL (CPU) APICs */
#define DEFAULT_APIC_BASE 0xfee00000
/* fields in VER */
#define APIC_VER_VERSION 0x000000ff
#define APIC_VER_MAXLVT 0x00ff0000
#define MAXLVTSHIFT 16
/* fields in SVR */
#define APIC_SVR_VECTOR 0x000000ff
#define APIC_SVR_VEC_PROG 0x000000f0
#define APIC_SVR_VEC_FIX 0x0000000f
#define APIC_SVR_ENABLE 0x00000100
# define APIC_SVR_SWDIS 0x00000000
# define APIC_SVR_SWEN 0x00000100
#define APIC_SVR_FOCUS 0x00000200
# define APIC_SVR_FEN 0x00000000
# define APIC_SVR_FDIS 0x00000200
/* fields in TPR */
#define APIC_TPR_PRIO 0x000000ff
# define APIC_TPR_INT 0x000000f0
# define APIC_TPR_SUB 0x0000000f
/* fields in ICR_LOW */
#define APIC_VECTOR_MASK 0x000000ff
#define APIC_DELMODE_MASK 0x00000700
# define APIC_DELMODE_FIXED 0x00000000
# define APIC_DELMODE_LOWPRIO 0x00000100
# define APIC_DELMODE_SMI 0x00000200
# define APIC_DELMODE_RR 0x00000300
# define APIC_DELMODE_NMI 0x00000400
# define APIC_DELMODE_INIT 0x00000500
# define APIC_DELMODE_STARTUP 0x00000600
# define APIC_DELMODE_RESV 0x00000700
#define APIC_DESTMODE_MASK 0x00000800
# define APIC_DESTMODE_PHY 0x00000000
# define APIC_DESTMODE_LOG 0x00000800
#define APIC_DELSTAT_MASK 0x00001000
# define APIC_DELSTAT_IDLE 0x00000000
# define APIC_DELSTAT_PEND 0x00001000
#define APIC_RESV1_MASK 0x00002000
#define APIC_LEVEL_MASK 0x00004000
# define APIC_LEVEL_DEASSERT 0x00000000
# define APIC_LEVEL_ASSERT 0x00004000
#define APIC_TRIGMOD_MASK 0x00008000
# define APIC_TRIGMOD_EDGE 0x00000000
# define APIC_TRIGMOD_LEVEL 0x00008000
#define APIC_RRSTAT_MASK 0x00030000
# define APIC_RRSTAT_INVALID 0x00000000
# define APIC_RRSTAT_INPROG 0x00010000
# define APIC_RRSTAT_VALID 0x00020000
# define APIC_RRSTAT_RESV 0x00030000
#define APIC_DEST_MASK 0x000c0000
# define APIC_DEST_DESTFLD 0x00000000
# define APIC_DEST_SELF 0x00040000
# define APIC_DEST_ALLISELF 0x00080000
# define APIC_DEST_ALLESELF 0x000c0000
#define APIC_RESV2_MASK 0xfff00000
/* fields in ICR_HIGH */
#define APIC_ID_MASK 0x0f000000
/* fields in LVT1/2 */
#define APIC_LVT_VECTOR 0x000000ff
#define APIC_LVT_DM 0x00000700
# define APIC_LVT_DM_FIXED 0x00000000
# define APIC_LVT_DM_NMI 0x00000400
# define APIC_LVT_DM_EXTINT 0x00000700
#define APIC_LVT_DS 0x00001000
#define APIC_LVT_IIPP 0x00002000
#define APIC_LVT_IIPP_INTALO 0x00002000
#define APIC_LVT_IIPP_INTAHI 0x00000000
#define APIC_LVT_RIRR 0x00004000
#define APIC_LVT_TM 0x00008000
#define APIC_LVT_M 0x00010000
/* fields in LVT Timer */
#define APIC_LVTT_VECTOR 0x000000ff
#define APIC_LVTT_DS 0x00001000
#define APIC_LVTT_M 0x00010000
#define APIC_LVTT_TM 0x00020000
/* fields in TDCR */
#define APIC_TDCR_2 0x00
#define APIC_TDCR_4 0x01
#define APIC_TDCR_8 0x02
#define APIC_TDCR_16 0x03
#define APIC_TDCR_32 0x08
#define APIC_TDCR_64 0x09
#define APIC_TDCR_128 0x0a
#define APIC_TDCR_1 0x0b
/*
* fields in IRR
* ISA INTerrupts are in bits 16-31 of the 1st IRR register.
* these masks DON'T EQUAL the isa IRQs of the same name.
*/
#define APIC_IRQ0 0x00000001
#define APIC_IRQ1 0x00000002
#define APIC_IRQ2 0x00000004
#define APIC_IRQ3 0x00000008
#define APIC_IRQ4 0x00000010
#define APIC_IRQ5 0x00000020
#define APIC_IRQ6 0x00000040
#define APIC_IRQ7 0x00000080
#define APIC_IRQ8 0x00000100
#define APIC_IRQ9 0x00000200
#define APIC_IRQ10 0x00000400
#define APIC_IRQ11 0x00000800
#define APIC_IRQ12 0x00001000
#define APIC_IRQ13 0x00002000
#define APIC_IRQ14 0x00004000
#define APIC_IRQ15 0x00008000
#define APIC_IRQ16 0x00010000
#define APIC_IRQ17 0x00020000
#define APIC_IRQ18 0x00040000
#define APIC_IRQ19 0x00080000
#define APIC_IRQ20 0x00100000
#define APIC_IRQ21 0x00200000
#define APIC_IRQ22 0x00400000
#define APIC_IRQ23 0x00800000
/******************************************************************************
* I/O APIC defines
*/
/* default physical locations of an IO APIC */
#define DEFAULT_IO_APIC_BASE 0xfec00000
/* window register offset */
#define IOAPIC_WINDOW 0x10
/* 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 VER */
#define IOART_VER_VERSION 0x000000ff
#define IOART_VER_MAXREDIR 0x00ff0000
#define MAXREDIRSHIFT 16
/*
* 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 */
#endif /* _MACHINE_APIC_H_ */
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