xref: /src/sys/arch/i386/include/specialreg.h

/*	$NetBSD: specialreg.h,v 1.10 2000/03/24 19:06:07 thorpej Exp $	*/

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * 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. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	@(#)specialreg.h	7.1 (Berkeley) 5/9/91
 */

/*
 * Bits in 386 special registers:
 */
#define	CR0_PE	0x00000001	/* Protected mode Enable */
#define	CR0_MP	0x00000002	/* "Math" Present (NPX or NPX emulator) */
#define	CR0_EM	0x00000004	/* EMulate non-NPX coproc. (trap ESC only) */
#define	CR0_TS	0x00000008	/* Task Switched (if MP, trap ESC and WAIT) */
#define	CR0_ET	0x00000010	/* Extension Type (387 (if set) vs 287) */
#define	CR0_PG	0x80000000	/* PaGing enable */

/*
 * Bits in 486 special registers:
 */
#define CR0_NE	0x00000020	/* Numeric Error enable (EX16 vs IRQ13) */
#define CR0_WP	0x00010000	/* Write Protect (honor PG_RW in all modes) */
#define CR0_AM	0x00040000	/* Alignment Mask (set to enable AC flag) */
#define	CR0_NW	0x20000000	/* Not Write-through */
#define	CR0_CD	0x40000000	/* Cache Disable */

/*
 * Cyrix 486 DLC special registers, accessable as IO ports.
 */
#define CCR0	0xc0		/* configuration control register 0 */
#define CCR0_NC0	0x01	/* first 64K of each 1M memory region is non-cacheable */
#define CCR0_NC1	0x02	/* 640K-1M region is non-cacheable */
#define CCR0_A20M	0x04	/* enables A20M# input pin */
#define CCR0_KEN	0x08	/* enables KEN# input pin */
#define CCR0_FLUSH	0x10	/* enables FLUSH# input pin */
#define CCR0_BARB	0x20	/* flushes internal cache when entering hold state */
#define CCR0_CO		0x40	/* cache org: 1=direct mapped, 0=2x set assoc */
#define CCR0_SUSPEND	0x80	/* enables SUSP# and SUSPA# pins */

#define CCR1	0xc1		/* configuration control register 1 */
#define CCR1_RPL	0x01	/* enables RPLSET and RPLVAL# pins */
/* the remaining 7 bits of this register are reserved */

/*
 * bits in the pentiums %cr4 register:
 */

#define CR4_VME	0x00000001	/* virtual 8086 mode extension enable */
#define CR4_PVI 0x00000002	/* protected mode virtual interrupt enable */
#define CR4_TSD 0x00000004	/* restrict RDTSC instruction to cpl 0 only */
#define CR4_DE	0x00000008	/* debugging extension */
#define CR4_PSE	0x00000010	/* large (4MB) page size enable */
#define CR4_PAE 0x00000020	/* physical address extension enable */
#define CR4_MCE	0x00000040	/* machine check enable */
#define CR4_PGE	0x00000080	/* page global enable */
#define CR4_PCE	0x00000100	/* enable RDPMC instruction for all cpls */

/*
 * CPUID "features" bits:
 */

#define CPUID_FPU	0x00000001	/* processor has an FPU? */
#define CPUID_VME	0x00000002	/* has virtual mode (%cr4's VME/PVI) */
#define CPUID_DE	0x00000004	/* has debugging extension */
#define CPUID_PSE	0x00000008	/* has page 4MB page size extension */
#define CPUID_TSC	0x00000010	/* has time stamp counter */
#define CPUID_MSR	0x00000020	/* has mode specific registers */
#define CPUID_PAE	0x00000040	/* has phys address extension */
#define CPUID_MCE	0x00000080	/* has machine check exception */
#define CPUID_CX8	0x00000100	/* has CMPXCHG8B instruction */
#define CPUID_APIC	0x00000200	/* has enabled APIC */
#define CPUID_B10	0x00000400	/* reserved, MTRR */
#define CPUID_SEP	0x00000800	/* has SYSENTER/SYSEXIT extension */
#define CPUID_MTRR	0x00001000	/* has memory type range register */
#define CPUID_PGE	0x00002000	/* has page global extension */
#define CPUID_MCA	0x00004000	/* has machine check architecture */
#define CPUID_CMOV	0x00008000	/* has CMOVcc instruction */
#define CPUID_FGPAT	0x00010000	/* Page Attribute Table */
#define CPUID_PSE36	0x00020000	/* 36-bit PSE */
#define CPUID_PN	0x00040000	/* processor serial number */
#define CPUID_B19	0x00080000	/* reserved */
#define CPUID_B20	0x00100000	/* reserved */
#define CPUID_B21	0x00200000	/* reserved */
#define CPUID_B22	0x00400000	/* reserved */
#define CPUID_MMX	0x00800000	/* MMX supported */
#define CPUID_FXSR	0x01000000	/* fast FP/MMX save/restore */
#define CPUID_XMM	0x02000000	/* streaming SIMD extensions */
/* bits 26->31 also reserved. */

#define CPUID_FLAGS1	"\20\1FPU\2VME\3DE\4PSE\5TSC\6MSR\7PAE\10MCE\11CX8\12APIC\13B10\14SEP\15MTRR"
#define CPUID_FLAGS2 "\20\16PGE\17MCA\20CMOV\21FGPAT\22PSE36\23PN\24B19\25B20\26B21\27B22\30MMX\31FXSR\32XMM\33B26\34B27\35B28\36B29\37B30\40B31"

/*
 * Model-specific registers for the i386 family
 */
#define MSR_P5_MC_ADDR		0x000
#define MSR_P5_MC_TYPE		0x001
#define MSR_TSC			0x010
#define MSR_APICBASE		0x01b
#define MSR_EBL_CR_POWERON	0x02a
#define MSR_BIOS_UPDT_TRIG	0x079
#define MSR_BIOS_SIGN		0x08b
#define MSR_PERFCTR0		0x0c1
#define MSR_PERFCTR1		0x0c2
#define MSR_MTRRcap		0x0fe
#define MSR_MCG_CAP		0x179
#define MSR_MCG_STATUS		0x17a
#define MSR_MCG_CTL		0x17b
#define MSR_EVNTSEL0		0x186
#define MSR_EVNTSEL1		0x187
#define MSR_DEBUGCTLMSR		0x1d9
#define MSR_LASTBRANCHFROMIP	0x1db
#define MSR_LASTBRANCHTOIP	0x1dc
#define MSR_LASTINTFROMIP	0x1dd
#define MSR_LASTINTTOIP		0x1de
#define MSR_ROB_CR_BKUPTMPDR6	0x1e0
#define MSR_MTRRVarBase		0x200
#define MSR_MTRR64kBase		0x250
#define MSR_MTRR16kBase		0x258
#define MSR_MTRR4kBase		0x268
#define MSR_MTRRdefType		0x2ff
#define MSR_MC0_CTL		0x400
#define MSR_MC0_STATUS		0x401
#define MSR_MC0_ADDR		0x402
#define MSR_MC0_MISC		0x403
#define MSR_MC1_CTL		0x404
#define MSR_MC1_STATUS		0x405
#define MSR_MC1_ADDR		0x406
#define MSR_MC1_MISC		0x407
#define MSR_MC2_CTL		0x408
#define MSR_MC2_STATUS		0x409
#define MSR_MC2_ADDR		0x40a
#define MSR_MC2_MISC		0x40b
#define MSR_MC4_CTL		0x40c
#define MSR_MC4_STATUS		0x40d
#define MSR_MC4_ADDR		0x40e
#define MSR_MC4_MISC		0x40f
#define MSR_MC3_CTL		0x410
#define MSR_MC3_STATUS		0x411
#define MSR_MC3_ADDR		0x412
#define MSR_MC3_MISC		0x413

/*
 * Constants related to MTRRs
 */
#define MTRR_N64K		8	/* numbers of fixed-size entries */
#define MTRR_N16K		16
#define MTRR_N4K		64

/*
 * the following four 3-byte registers control the non-cacheable regions.
 * These registers must be written as three seperate bytes.
 *
 * NCRx+0: A31-A24 of starting address
 * NCRx+1: A23-A16 of starting address
 * NCRx+2: A15-A12 of starting address | NCR_SIZE_xx.
 *
 * The non-cacheable region's starting address must be aligned to the
 * size indicated by the NCR_SIZE_xx field.
 */
#define NCR1	0xc4
#define NCR2	0xc7
#define NCR3	0xca
#define NCR4	0xcd

#define NCR_SIZE_0K	0
#define NCR_SIZE_4K	1
#define NCR_SIZE_8K	2
#define NCR_SIZE_16K	3
#define NCR_SIZE_32K	4
#define NCR_SIZE_64K	5
#define NCR_SIZE_128K	6
#define NCR_SIZE_256K	7
#define NCR_SIZE_512K	8
#define NCR_SIZE_1M	9
#define NCR_SIZE_2M	10
#define NCR_SIZE_4M	11
#define NCR_SIZE_8M	12
#define NCR_SIZE_16M	13
#define NCR_SIZE_32M	14
#define NCR_SIZE_4G	15