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

1.1     ! root        1: /* 
        !             2:  * Copyright (c) 1995-1994 The University of Utah and
        !             3:  * the Computer Systems Laboratory at the University of Utah (CSL).
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * Permission to use, copy, modify and distribute this software is hereby
        !             7:  * granted provided that (1) source code retains these copyright, permission,
        !             8:  * and disclaimer notices, and (2) redistributions including binaries
        !             9:  * reproduce the notices in supporting documentation, and (3) all advertising
        !            10:  * materials mentioning features or use of this software display the following
        !            11:  * acknowledgement: ``This product includes software developed by the
        !            12:  * Computer Systems Laboratory at the University of Utah.''
        !            13:  *
        !            14:  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
        !            15:  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
        !            16:  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            17:  *
        !            18:  * CSL requests users of this software to return to [email protected] any
        !            19:  * improvements that they make and grant CSL redistribution rights.
        !            20:  *
        !            21:  *      Author: Bryan Ford, University of Utah CSL
        !            22:  */
        !            23: #ifndef _KUKM_I386_PC_DEBUG_H_
        !            24: #define _KUKM_I386_PC_DEBUG_H_
        !            25: 
        !            26: #ifdef ASSEMBLER
        !            27: #ifdef DEBUG
        !            28: 
        !            29: 
        !            30: /* Poke a character directly onto the VGA text display,
        !            31:    as a very quick, mostly-reliable status indicator.
        !            32:    Assumes ss is a kernel data segment register.  */
        !            33: #define POKE_STATUS(char,scratch)              \
        !            34:        ss/*XXX gas bug */                      ;\
        !            35:        movl    %ss:_phys_mem_va,scratch        ;\
        !            36:        addl    $0xb8000+80*2*13+40*2,scratch   ;\
        !            37:        movb    char,%ss:(scratch)              ;\
        !            38:        movb    $0xf0,%ss:1(scratch)
        !            39: 
        !            40: 
        !            41: #else !DEBUG
        !            42: 
        !            43: #define POKE_STATUS(char,scratch)
        !            44: 
        !            45: #endif !DEBUG
        !            46: #else !ASSEMBLER
        !            47: #ifdef DEBUG
        !            48: 
        !            49: #include <mach/machine/vm_types.h>
        !            50: 
        !            51: 
        !            52: #define POKE_STATUS(string)                                            \
        !            53:        ({      unsigned char *s = (string);                            \
        !            54:                extern vm_offset_t phys_mem_va;                         \
        !            55:                short *d = (short*)(phys_mem_va+0xb8000+80*2*13+40*2);  \
        !            56:                while (*s) { (*d++) = 0x3000 | (*s++); }                \
        !            57:                *d = ' ';                                               \
        !            58:        })
        !            59: 
        !            60: 
        !            61: #else !DEBUG
        !            62: 
        !            63: #define POKE_STATUS(char)
        !            64: 
        !            65: #endif !DEBUG
        !            66: #endif !ASSEMBLER
        !            67: 
        !            68: 
        !            69: #include_next "debug.h"
        !            70: 
        !            71: #endif _KUKM_I386_PC_DEBUG_H_

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