FreeBSD/Linux Kernel Cross Reference
sys/i386/include/specialreg.h

     /*-
      * 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.
     * 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.
     *
     *      from: @(#)specialreg.h  7.1 (Berkeley) 5/9/91
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_SPECIALREG_H_
    #define _MACHINE_SPECIALREG_H_
    
    /*
     * 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) */
    #ifdef notused
    #define CR0_ET  0x00000010      /* Extension Type (387 (if set) vs 287) */
    #endif
    #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 page protect 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 */
    
    /*
     * Bits in PPro special registers
     */
    #define CR4_VME 0x00000001      /* Virtual 8086 mode extensions */
    #define CR4_PVI 0x00000002      /* Protected-mode virtual interrupts */
    #define CR4_TSD 0x00000004      /* Time stamp disable */
    #define CR4_DE  0x00000008      /* Debugging extensions */
    #define CR4_PSE 0x00000010      /* Page size extensions */
    #define CR4_PAE 0x00000020      /* Physical address extension */
    #define CR4_MCE 0x00000040      /* Machine check enable */
    #define CR4_PGE 0x00000080      /* Page global enable */
    #define CR4_PCE 0x00000100      /* Performance monitoring counter enable */
    #define CR4_FXSR 0x00000200     /* Fast FPU save/restore used by OS */
    #define CR4_XMM 0x00000400      /* enable SIMD/MMX2 to use except 16 */
    
    /*
     * CPUID instruction features register
     */
    #define CPUID_FPU       0x00000001
    #define CPUID_VME       0x00000002
    #define CPUID_DE        0x00000004
    #define CPUID_PSE       0x00000008
    #define CPUID_TSC       0x00000010
    #define CPUID_MSR       0x00000020
    #define CPUID_PAE       0x00000040
    #define CPUID_MCE       0x00000080
    #define CPUID_CX8       0x00000100
    #define CPUID_APIC      0x00000200
    #define CPUID_B10       0x00000400
    #define CPUID_SEP       0x00000800
    #define CPUID_MTRR      0x00001000
    #define CPUID_PGE       0x00002000
    #define CPUID_MCA       0x00004000
    #define CPUID_CMOV      0x00008000
    #define CPUID_PAT       0x00010000
    #define CPUID_PSE36     0x00020000
    #define CPUID_PSN       0x00040000
    #define CPUID_CLFSH     0x00080000
    #define CPUID_B20       0x00100000
    #define CPUID_DS        0x00200000
    #define CPUID_ACPI      0x00400000
    #define CPUID_MMX       0x00800000
   #define CPUID_FXSR      0x01000000
   #define CPUID_SSE       0x02000000
   #define CPUID_XMM       0x02000000
   #define CPUID_SSE2      0x04000000
   #define CPUID_SS        0x08000000
   #define CPUID_HTT       0x10000000
   #define CPUID_TM        0x20000000
   #define CPUID_IA64      0x40000000
   #define CPUID_PBE       0x80000000
   
   /*
    * CPUID instruction 1 ebx info
    */
   #define CPUID_BRAND_INDEX       0x000000ff
   #define CPUID_CLFUSH_SIZE       0x0000ff00
   #define CPUID_HTT_CORES         0x00ff0000
   #define CPUID_LOCAL_APIC_ID     0xff000000
   
   /*
    * 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_P5_CESR             0x011
   #define MSR_P5_CTR0             0x012
   #define MSR_P5_CTR1             0x013
   #define MSR_IA32_PLATFORM_ID    0x017
   #define MSR_APICBASE            0x01b
   #define MSR_EBL_CR_POWERON      0x02a
   #define MSR_TEST_CTL            0x033
   #define MSR_BIOS_UPDT_TRIG      0x079
   #define MSR_BBL_CR_D0           0x088
   #define MSR_BBL_CR_D1           0x089
   #define MSR_BBL_CR_D2           0x08a
   #define MSR_BIOS_SIGN           0x08b
   #define MSR_PERFCTR0            0x0c1
   #define MSR_PERFCTR1            0x0c2
   #define MSR_MTRRcap             0x0fe
   #define MSR_BBL_CR_ADDR         0x116
   #define MSR_BBL_CR_DECC         0x118
   #define MSR_BBL_CR_CTL          0x119
   #define MSR_BBL_CR_TRIG         0x11a
   #define MSR_BBL_CR_BUSY         0x11b
   #define MSR_BBL_CR_CTL3         0x11e
   #define MSR_SYSENTER_CS_MSR     0x174
   #define MSR_SYSENTER_ESP_MSR    0x175
   #define MSR_SYSENTER_EIP_MSR    0x176
   #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_THERM_CONTROL       0x19a
   #define MSR_THERM_INTERRUPT     0x19b
   #define MSR_THERM_STATUS        0x19c
   #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 MSR's.
    */
   #define APICBASE_RESERVED       0x000006ff
   #define APICBASE_BSP            0x00000100
   #define APICBASE_ENABLED        0x00000800
   #define APICBASE_ADDRESS        0xfffff000
   
   /*
    * Constants related to MTRRs
    */
   #define MTRR_N64K               8       /* numbers of fixed-size entries */
   #define MTRR_N16K               16
   #define MTRR_N4K                64
   
   /*
    * Cyrix configuration registers, accessible 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 */
   #define CCR1_SMI                0x02    /* Enables SMM pins */
   #define CCR1_SMAC               0x04    /* System management memory access */
   #define CCR1_MMAC               0x08    /* Main memory access */
   #define CCR1_NO_LOCK    0x10    /* Negate LOCK# */
   #define CCR1_SM3                0x80    /* SMM address space address region 3 */
   
   #define CCR2                    0xc2
   #define CCR2_WB                 0x02    /* Enables WB cache interface pins */
   #define CCR2_SADS               0x02    /* Slow ADS */
   #define CCR2_LOCK_NW    0x04    /* LOCK NW Bit */
   #define CCR2_SUSP_HLT   0x08    /* Suspend on HALT */
   #define CCR2_WT1                0x10    /* WT region 1 */
   #define CCR2_WPR1               0x10    /* Write-protect region 1 */
   #define CCR2_BARB               0x20    /* Flushes write-back cache when entering
                                                                      hold state. */
   #define CCR2_BWRT               0x40    /* Enables burst write cycles */
   #define CCR2_USE_SUSP   0x80    /* Enables suspend pins */
   
   #define CCR3                    0xc3
   #define CCR3_SMILOCK    0x01    /* SMM register lock */
   #define CCR3_NMI                0x02    /* Enables NMI during SMM */
   #define CCR3_LINBRST    0x04    /* Linear address burst cycles */
   #define CCR3_SMMMODE    0x08    /* SMM Mode */
   #define CCR3_MAPEN0             0x10    /* Enables Map0 */
   #define CCR3_MAPEN1             0x20    /* Enables Map1 */
   #define CCR3_MAPEN2             0x40    /* Enables Map2 */
   #define CCR3_MAPEN3             0x80    /* Enables Map3 */
   
   #define CCR4                    0xe8
   #define CCR4_IOMASK             0x07
   #define CCR4_MEM                0x08    /* Enables momory bypassing */
   #define CCR4_DTE                0x10    /* Enables directory table entry cache */
   #define CCR4_FASTFPE    0x20    /* Fast FPU exception */
   #define CCR4_CPUID              0x80    /* Enables CPUID instruction */
   
   #define CCR5                    0xe9
   #define CCR5_WT_ALLOC   0x01    /* Write-through allocate */
   #define CCR5_SLOP               0x02    /* LOOP instruction slowed down */
   #define CCR5_LBR1               0x10    /* Local bus region 1 */
   #define CCR5_ARREN              0x20    /* Enables ARR region */
   
   #define CCR6                    0xea
   
   #define CCR7                    0xeb
   
   /* Performance Control Register (5x86 only). */
   #define PCR0                    0x20
   #define PCR0_RSTK               0x01    /* Enables return stack */
   #define PCR0_BTB                0x02    /* Enables branch target buffer */
   #define PCR0_LOOP               0x04    /* Enables loop */
   #define PCR0_AIS                0x08    /* Enables all instrcutions stalled to
                                                                      serialize pipe. */
   #define PCR0_MLR                0x10    /* Enables reordering of misaligned loads */
   #define PCR0_BTBRT              0x40    /* Enables BTB test register. */
   #define PCR0_LSSER              0x80    /* Disable reorder */
   
   /* Device Identification Registers */
   #define DIR0                    0xfe
   #define DIR1                    0xff
   
   /*
    * The following four 3-byte registers control the non-cacheable regions.
    * These registers must be written as three separate 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
   
   /*
    * The address region registers are used to specify the location and
    * size for the eight address regions.
    *
    * ARRx + 0: A31-A24 of start address
    * ARRx + 1: A23-A16 of start address
    * ARRx + 2: A15-A12 of start address | ARR_SIZE_xx
    */
   #define ARR0    0xc4
   #define ARR1    0xc7
   #define ARR2    0xca
   #define ARR3    0xcd
   #define ARR4    0xd0
   #define ARR5    0xd3
   #define ARR6    0xd6
   #define ARR7    0xd9
   
   #define ARR_SIZE_0K             0
   #define ARR_SIZE_4K             1
   #define ARR_SIZE_8K             2
   #define ARR_SIZE_16K    3
   #define ARR_SIZE_32K    4
   #define ARR_SIZE_64K    5
   #define ARR_SIZE_128K   6
   #define ARR_SIZE_256K   7
   #define ARR_SIZE_512K   8
   #define ARR_SIZE_1M             9
   #define ARR_SIZE_2M             10
   #define ARR_SIZE_4M             11
   #define ARR_SIZE_8M             12
   #define ARR_SIZE_16M    13
   #define ARR_SIZE_32M    14
   #define ARR_SIZE_4G             15
   
   /*
    * The region control registers specify the attributes associated with
    * the ARRx addres regions.
    */
   #define RCR0    0xdc
   #define RCR1    0xdd
   #define RCR2    0xde
   #define RCR3    0xdf
   #define RCR4    0xe0
   #define RCR5    0xe1
   #define RCR6    0xe2
   #define RCR7    0xe3
   
   #define RCR_RCD 0x01    /* Disables caching for ARRx (x = 0-6). */
   #define RCR_RCE 0x01    /* Enables caching for ARR7. */
   #define RCR_WWO 0x02    /* Weak write ordering. */
   #define RCR_WL  0x04    /* Weak locking. */
   #define RCR_WG  0x08    /* Write gathering. */
   #define RCR_WT  0x10    /* Write-through. */
   #define RCR_NLB 0x20    /* LBA# pin is not asserted. */
   
   /* AMD Write Allocate Top-Of-Memory and Control Register */
   #define AMD_WT_ALLOC_TME        0x40000 /* top-of-memory enable */
   #define AMD_WT_ALLOC_PRE        0x20000 /* programmable range enable */
   #define AMD_WT_ALLOC_FRE        0x10000 /* fixed (A0000-FFFFF) range enable */
   
   
   #ifndef LOCORE
   static __inline u_char
   read_cyrix_reg(u_char reg)
   {
           outb(0x22, reg);
           return inb(0x23);
   }
   
   static __inline void
   write_cyrix_reg(u_char reg, u_char data)
   {
           outb(0x22, reg);
           outb(0x23, data);
   }
   #endif
   
   #endif /* !_MACHINE_SPECIALREG_H_ */

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