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Annotation of Gnu-Mach/i386/pc/pic.h, revision 1.1

1.1     ! root        1: /* 
        !             2:  * Mach Operating System
        !             3:  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
        !             4:  * All Rights Reserved.
        !             5:  * 
        !             6:  * Permission to use, copy, modify and distribute this software and its
        !             7:  * documentation is hereby granted, provided that both the copyright
        !             8:  * notice and this permission notice appear in all copies of the
        !             9:  * software, derivative works or modified versions, and any portions
        !            10:  * thereof, and that both notices appear in supporting documentation.
        !            11:  * 
        !            12:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            13:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            14:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            15:  * 
        !            16:  * Carnegie Mellon requests users of this software to return to
        !            17:  * 
        !            18:  *  Software Distribution Coordinator  or  [email protected]
        !            19:  *  School of Computer Science
        !            20:  *  Carnegie Mellon University
        !            21:  *  Pittsburgh PA 15213-3890
        !            22:  * 
        !            23:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            24:  * the rights to redistribute these changes.
        !            25:  */
        !            26: /*
        !            27: Copyright (c) 1988,1989 Prime Computer, Inc.  Natick, MA 01760
        !            28: All Rights Reserved.
        !            29: 
        !            30: Permission to use, copy, modify, and distribute this
        !            31: software and its documentation for any purpose and
        !            32: without fee is hereby granted, provided that the above
        !            33: copyright notice appears in all copies and that both the
        !            34: copyright notice and this permission notice appear in
        !            35: supporting documentation, and that the name of Prime
        !            36: Computer, Inc. not be used in advertising or publicity
        !            37: pertaining to distribution of the software without
        !            38: specific, written prior permission.
        !            39: 
        !            40: THIS SOFTWARE IS PROVIDED "AS IS", AND PRIME COMPUTER,
        !            41: INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
        !            42: SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            43: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN
        !            44: NO EVENT SHALL PRIME COMPUTER, INC.  BE LIABLE FOR ANY
        !            45: SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
        !            46: DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
        !            47: PROFITS, WHETHER IN ACTION OF CONTRACT, NEGLIGENCE, OR
        !            48: OTHER TORTIOUS ACTION, ARISING OUR OF OR IN CONNECTION
        !            49: WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            50: */
        !            51: 
        !            52: #ifndef        _I386_PIC_H_
        !            53: #define        _I386_PIC_H_
        !            54: 
        !            55: #include "irq.h"
        !            56: 
        !            57: #define NINTR  0x10
        !            58: #define        NPICS   0x02
        !            59: 
        !            60: /*
        !            61: ** The following are definitions used to locate the PICs in the system
        !            62: */
        !            63: 
        !            64: #define ADDR_PIC_BASE          0x20
        !            65: #define OFF_ICW                        0x00
        !            66: #define OFF_OCW                        0x01
        !            67: #define SIZE_PIC               0x80
        !            68: 
        !            69: #define MASTER_ICW             (ADDR_PIC_BASE + OFF_ICW)
        !            70: #define MASTER_OCW             (ADDR_PIC_BASE + OFF_OCW)
        !            71: #define SLAVES_ICW             (ADDR_PIC_BASE + OFF_ICW + SIZE_PIC)
        !            72: #define SLAVES_OCW             (ADDR_PIC_BASE + OFF_OCW + SIZE_PIC)
        !            73: 
        !            74: /*
        !            75: ** The following banks of definitions ICW1, ICW2, ICW3, and ICW4 are used
        !            76: ** to define the fields of the various ICWs for initialisation of the PICs 
        !            77: */
        !            78: 
        !            79: /*
        !            80: **     ICW1                            
        !            81: */
        !            82: 
        !            83: #define ICW_TEMPLATE           0x10
        !            84: 
        !            85: #define LEVL_TRIGGER           0x08
        !            86: #define EDGE_TRIGGER           0x00
        !            87: #define ADDR_INTRVL4           0x04
        !            88: #define ADDR_INTRVL8           0x00
        !            89: #define SINGLE__MODE           0x02
        !            90: #define CASCADE_MODE           0x00
        !            91: #define ICW4__NEEDED           0x01
        !            92: #define NO_ICW4_NEED           0x00
        !            93: 
        !            94: /*
        !            95: **     ICW2
        !            96: */
        !            97: 
        !            98: #define        PICM_VECTBASE           IDT_IRQ_BASE
        !            99: #define PICS_VECTBASE          (PICM_VECTBASE + 0x08)
        !           100: 
        !           101: /*
        !           102: **     ICW3                            
        !           103: */
        !           104: 
        !           105: #define SLAVE_ON_IR0           0x01
        !           106: #define SLAVE_ON_IR1           0x02
        !           107: #define SLAVE_ON_IR2           0x04
        !           108: #define SLAVE_ON_IR3           0x08
        !           109: #define SLAVE_ON_IR4           0x10
        !           110: #define SLAVE_ON_IR5           0x20
        !           111: #define SLAVE_ON_IR6           0x40
        !           112: #define SLAVE_ON_IR7           0x80
        !           113: 
        !           114: #define I_AM_SLAVE_0           0x00
        !           115: #define I_AM_SLAVE_1           0x01
        !           116: #define I_AM_SLAVE_2           0x02
        !           117: #define I_AM_SLAVE_3           0x03
        !           118: #define I_AM_SLAVE_4           0x04
        !           119: #define I_AM_SLAVE_5           0x05
        !           120: #define I_AM_SLAVE_6           0x06
        !           121: #define I_AM_SLAVE_7           0x07
        !           122: 
        !           123: /*
        !           124: **     ICW4                            
        !           125: */
        !           126: 
        !           127: #define SNF_MODE_ENA           0x10
        !           128: #define SNF_MODE_DIS           0x00
        !           129: #define BUFFERD_MODE           0x08
        !           130: #define NONBUFD_MODE           0x00
        !           131: #define AUTO_EOI_MOD           0x02
        !           132: #define NRML_EOI_MOD           0x00
        !           133: #define I8086_EMM_MOD          0x01
        !           134: #define SET_MCS_MODE           0x00
        !           135: 
        !           136: /*
        !           137: **     OCW1                            
        !           138: */
        !           139: 
        !           140: #define PICM_MASK              0xFF
        !           141: #define        PICS_MASK               0xFF
        !           142: 
        !           143: /*
        !           144: **     OCW2                            
        !           145: */
        !           146: 
        !           147: #define NON_SPEC_EOI           0x20
        !           148: #define SPECIFIC_EOI           0x30
        !           149: #define ROT_NON_SPEC           0x50
        !           150: #define SET_ROT_AEOI           0x40
        !           151: #define RSET_ROTAEOI           0x00
        !           152: #define ROT_SPEC_EOI           0x70
        !           153: #define SET_PRIORITY           0x60
        !           154: #define NO_OPERATION           0x20
        !           155: 
        !           156: #define SEND_EOI_IR0           0x00
        !           157: #define SEND_EOI_IR1           0x01
        !           158: #define SEND_EOI_IR2           0x02
        !           159: #define SEND_EOI_IR3           0x03
        !           160: #define SEND_EOI_IR4           0x04
        !           161: #define SEND_EOI_IR5           0x05
        !           162: #define SEND_EOI_IR6           0x06
        !           163: #define SEND_EOI_IR7           0x07
        !           164:  
        !           165: /*
        !           166: **     OCW3                            
        !           167: */
        !           168: 
        !           169: #define OCW_TEMPLATE           0x08
        !           170: #define SPECIAL_MASK           0x40
        !           171: #define MASK_MDE_SET           0x20
        !           172: #define MASK_MDE_RST           0x00
        !           173: #define POLL_COMMAND           0x04
        !           174: #define NO_POLL_CMND           0x00
        !           175: #define READ_NEXT_RD           0x02
        !           176: #define READ_IR_ONRD           0x00
        !           177: #define READ_IS_ONRD           0x01
        !           178: 
        !           179: 
        !           180: /*
        !           181: **     Standard PIC initialization values for PCs.
        !           182: */
        !           183: #define PICM_ICW1      (ICW_TEMPLATE | EDGE_TRIGGER | ADDR_INTRVL8 \
        !           184:                         | CASCADE_MODE | ICW4__NEEDED)
        !           185: #define PICM_ICW3      (SLAVE_ON_IR2)
        !           186: #define PICM_ICW4      (SNF_MODE_DIS | NONBUFD_MODE | NRML_EOI_MOD \
        !           187:                         | I8086_EMM_MOD)
        !           188: 
        !           189: #define PICS_ICW1      (ICW_TEMPLATE | EDGE_TRIGGER | ADDR_INTRVL8 \
        !           190:                         | CASCADE_MODE | ICW4__NEEDED)
        !           191: #define PICS_ICW3      (I_AM_SLAVE_2)
        !           192: #define PICS_ICW4      (SNF_MODE_DIS | NONBUFD_MODE | NRML_EOI_MOD \
        !           193:                         | I8086_EMM_MOD)
        !           194: 
        !           195: /* Some systems need a little bit of delay
        !           196:    while fiddling with PIC registers.  */
        !           197: #ifndef ASSEMBLER
        !           198: #define PIC_DELAY() asm volatile("jmp 1f; 1: jmp 1f; 1:")
        !           199: #else
        !           200: #define PIC_DELAY jmp 9f; 9: jmp 9f; 9:
        !           201: #endif
        !           202: 
        !           203: 
        !           204: #endif _I386_PIC_H_

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