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FreeDOS/kernel/globals.h
Bart Oldeman f2184025da See history.txt for changes. Bug fixes and HMA support are the main ones. 
git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@167 6ac86273-5f31-0410-b378-82cca8765d1b
2001-03-21 02:56:26 +00:00

771 lines
26 KiB
C
Raw Blame History

/****************************************************************/
/* */
/* globals.h */
/* DOS-C */
/* */
/* Global data structures and declarations */
/* */
/* Copyright (c) 1995, 1996 */
/* Pasquale J. Villani */
/* All Rights Reserved */
/* */
/* This file is part of DOS-C. */
/* */
/* DOS-C is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version */
/* 2, or (at your option) any later version. */
/* */
/* DOS-C is distributed in the hope that it will be useful, but */
/* WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
/* the GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public */
/* License along with DOS-C; see the file COPYING. If not, */
/* write to the Free Software Foundation, 675 Mass Ave, */
/* Cambridge, MA 02139, USA. */
/****************************************************************/
/* $Logfile: C:/usr/patv/dos-c/src/kernel/globals.h_v $ */
#ifdef VERSION_STRINGS
#ifdef MAIN
static BYTE *Globals_hRcsId = "$Id$";
#endif
#endif
/*
* $Log$
* Revision 1.7 2001/03/21 02:56:26 bartoldeman
* See history.txt for changes. Bug fixes and HMA support are the main ones.
*
* Revision 1.6 2000/12/16 01:38:35 jimtabor
* Added patches from Bart Oldeman
*
* Revision 1.5 2000/08/06 05:50:17 jimtabor
* Add new files and update cvs with patches and changes
*
* Revision 1.3 2000/05/25 20:56:21 jimtabor
* Fixed project history
*
* Revision 1.2 2000/05/08 04:30:00 jimtabor
* Update CVS to 2020
*
* Revision 1.1.1.1 2000/05/06 19:34:53 jhall1
* The FreeDOS Kernel. A DOS kernel that aims to be 100% compatible with
* MS-DOS. Distributed under the GNU GPL.
*
* Revision 1.17 2000/03/16 03:28:49 kernel
* *** empty log message ***
*
* Revision 1.16 2000/03/09 06:07:11 kernel
* 2017f updates by James Tabor
*
* Revision 1.15 1999/09/23 04:40:47 jprice
* *** empty log message ***
*
* Revision 1.13 1999/08/25 03:18:08 jprice
* ror4 patches to allow TC 2.01 compile.
*
* Revision 1.12 1999/08/10 18:03:43 jprice
* ror4 2011-03 patch
*
* Revision 1.11 1999/05/03 06:25:45 jprice
* Patches from ror4 and many changed of signed to unsigned variables.
*
* Revision 1.10 1999/04/16 21:43:40 jprice
* ror4 multi-sector IO
*
* Revision 1.9 1999/04/16 12:21:22 jprice
* Steffen c-break handler changes
*
* Revision 1.8 1999/04/16 00:53:33 jprice
* Optimized FAT handling
*
* Revision 1.7 1999/04/12 03:21:17 jprice
* more ror4 patches. Changes for multi-block IO
*
* Revision 1.6 1999/04/11 04:33:39 jprice
* ror4 patches
*
* Revision 1.4 1999/04/04 22:57:47 jprice
* no message
*
* Revision 1.3 1999/04/04 18:51:43 jprice
* no message
*
* Revision 1.2 1999/03/29 17:05:09 jprice
* ror4 changes
*
* Revision 1.1.1.1 1999/03/29 15:40:58 jprice
* New version without IPL.SYS
*
* Revision 1.5 1999/02/08 05:55:57 jprice
* Added Pat's 1937 kernel patches
*
* Revision 1.4 1999/02/01 01:48:41 jprice
* Clean up; Now you can use hex numbers in config.sys. added config.sys screen function to change screen mode (28 or 43/50 lines)
*
* Revision 1.3 1999/01/30 08:26:46 jprice
* Clean up; commented out copyright messages while we debug.
*
* Revision 1.2 1999/01/22 04:13:26 jprice
* Formating
*
* Revision 1.1.1.1 1999/01/20 05:51:01 jprice
* Imported sources
*
Rev 1.16 06 Dec 1998 8:45:56 patv
Expanded due to new I/O subsystem.
Rev 1.15 07 Feb 1998 20:38:00 patv
Modified stack fram to match DOS standard
Rev 1.14 02 Feb 1998 22:33:46 patv
Fixed size of default_drive. Caused failures when break_ena was not zero.
Rev 1.13 22 Jan 1998 4:09:24 patv
Fixed pointer problems affecting SDA
Rev 1.12 04 Jan 1998 23:16:22 patv
Changed Log for strip utility
Rev 1.11 03 Jan 1998 8:36:50 patv
Converted data area to SDA format
Rev 1.10 06 Feb 1997 21:57:04 patv
Changed version format string
Rev 1.9 06 Feb 1997 21:35:08 patv
Modified to support new version format
Rev 1.8 22 Jan 1997 13:17:14 patv
Changed to support version.h and pre-0.92 Svante Frey bug fixes.
Rev 1.6 16 Jan 1997 12:47:00 patv
pre-Release 0.92 feature additions
Rev 1.5 13 Sep 1996 19:26:32 patv
Fixed boot for hard drive
Rev 1.4 29 Aug 1996 13:07:22 patv
Bug fixes for v0.91b
Rev 1.3 29 May 1996 21:03:34 patv
bug fixes for v0.91a
Rev 1.2 19 Feb 1996 3:23:04 patv
Added NLS, int2f and config.sys processing
Rev 1.1 01 Sep 1995 17:54:16 patv
First GPL release.
Rev 1.0 02 Jul 1995 8:31:00 patv
Initial revision.
*/
#include "device.h"
#include "mcb.h"
#include "pcb.h"
#include "date.h"
#include "time.h"
#include "fat.h"
#include "fcb.h"
#include "tail.h"
#include "process.h"
#include "dcb.h"
#include "sft.h"
#include "cds.h"
#include "exe.h"
#include "fnode.h"
#include "dirmatch.h"
#include "file.h"
#include "clock.h"
#include "kbd.h"
#include "error.h"
#include "version.h"
#include "network.h"
#include "config.h"
/* JPP: for testing/debuging disk IO */
/*#define DISPLAY_GETBLOCK */
/* */
/* Convience switch for maintaining variables in a single location */
/* */
#ifdef MAIN
#define GLOBAL
#else
#define GLOBAL extern
#endif
/* */
/* Convience definitions of TRUE and FALSE */
/* */
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif
/* */
/* Constants and macros */
/* */
/* Defaults and limits - System wide */
#define PARSE_MAX 67 /* maximum # of bytes in path */
#define NFILES 16 /* number of files in table */
#define NFCBS 16 /* number of fcbs */
#define NDEVS 26 /* number of supported devices */
#define NSTACKS 8 /* number of stacks */
#define NLAST 6 /* last drive */
#define NAMEMAX PARSE_MAX /* Maximum path for CDS */
#define NUMBUFF 6 /* Number of track buffers */
/* -- must be at least 3 */
/* 0 = CON, standard input, can be redirected */
/* 1 = CON, standard output, can be redirected */
/* 2 = CON, standard error */
/* 3 = AUX, auxiliary */
/* 4 = PRN, list device */
/* 5 = 1st user file ... */
#define STDIN 0
#define STDOUT 1
#define STDERR 2
#define STDAUX 3
#define STDPRN 4
/* internal error from failure or aborted operation */
#define ERROR -1
#define OK 0
/* internal transfer direction flags */
#define XFR_READ 1
#define XFR_WRITE 2
#define RDONLY 0
#define WRONLY 1
#define RDWR 2
/* special ascii code equates */
#define SPCL 0x00
#define CTL_C 0x03
#define CTL_F 0x06
#define BELL 0x07
#define BS 0x08
#define HT 0x09
#define LF 0x0a
#define CR 0x0d
#define CTL_Q 0x11
#define CTL_S 0x13
#define CTL_Z 0x1a
#define ESC 0x1b
#define CTL_BS 0x7f
#define F3 0x3d
#define LEFT 0x4b
#define RIGHT 0x4d
/* Blockio constants */
#define DSKWRITE 1 /* dskxfr function parameters */
#define DSKREAD 2
/* FAT cluster special flags */
#define FREE 0x000
#define LONG_LAST_CLUSTER 0xFFFF
#define LONG_MASK 0xFFF8
#define LONG_BAD 0xFFF0
#define LAST_CLUSTER 0x0FFF
#define MASK 0xFF8
#define BAD 0xFF0
/* Keyboard buffer maximum size */
#ifdef LINESIZE
#undef LINESIZE
#endif
#define LINESIZE 256
/* */
/* Data structures and unions */
/* */
/* Sector buffer structure */
#define BUFFERSIZE 512
struct buffer
{
struct buffer
FAR *b_next; /* form linked list for LRU */
BYTE b_unit; /* disk for this buffer */
BYTE b_flag; /* buffer flags */
ULONG b_blkno; /* block for this buffer */
/* DOS-C: 0xffff for huge block numbers */
BYTE b_copies; /* number of copies to write */
UBYTE b_offset_lo; /* span between copies (low) */
#if 0 /*TE*/
union
{
struct dpb FAR *_b_dpbp; /* pointer to DPB */
LONG _b_huge_blkno; /* DOS-C: actual block number if >= 0xffff */
}
_b;
#endif
UBYTE b_offset_hi; /* DOS-C: span between copies (high) */
UBYTE b_unused;
BYTE b_buffer[BUFFERSIZE]; /* 512 byte sectors for now */
};
#define b_dpbp _b._b_dpbp
#define b_huge_blkno _b._b_huge_blkno
#define BFR_DIRTY 0x40 /* buffer modified */
#define BFR_VALID 0x20 /* buffer contains valid data */
#define BFR_DATA 0x08 /* buffer is from data area */
#define BFR_DIR 0x04 /* buffer is from dir area */
#define BFR_FAT 0x02 /* buffer is from fat area */
#define BFR_BOOT 0x01 /* buffer is boot disk */
/* NLS character table type */
typedef BYTE *UPMAP;
/* */
/* External Assembly variables */
/* */
extern struct dhdr
FAR clk_dev, /* Clock device driver */
FAR con_dev, /* Console device driver */
FAR prn_dev, /* Generic printer device driver */
FAR aux_dev, /* Generic aux device driver */
FAR blk_dev; /* Block device (Disk) driver */
extern UWORD
ram_top, /* How much ram in Kbytes */
#ifdef I86
api_sp, /* api stacks - for context */
#endif
api_ss, /* switching */
usr_sp, /* user stack */
usr_ss;
extern COUNT *
#ifdef MC68K
api_sp, /* api stacks - for context */
#endif
error_tos, /* error stack */
disk_api_tos, /* API handler stack - disk fns */
char_api_tos; /* API handler stack - char fns */
extern BYTE
FAR _InitTextStart; /* first available byte of ram */
extern BYTE
FAR _HMATextAvailable, /* first byte of available CODE area */
FAR _HMATextStart[], /* first byte of HMAable CODE area */
FAR _HMATextEnd[]; /* and the last byte of it */
extern
BYTE DosLoadedInHMA; /* if InitHMA has moved DOS up */
extern struct ClockRecord
ClkRecord;
/* */
/* Global variables */
/* */
GLOBAL
seg master_env; /* Master environment segment */
GLOBAL BYTE
os_major, /* major version number */
os_minor, /* minor version number */
rev_number /* minor version number */
#ifdef MAIN
= REV_NUMBER,
#else
,
#endif
version_flags; /* minor version number */
#ifdef DEBUG
GLOBAL WORD bDumpRegs
#ifdef MAIN
= FALSE;
#else
;
#endif
GLOBAL WORD bDumpRdWrParms
#ifdef MAIN
= FALSE;
#else
;
#endif
#endif
GLOBAL BYTE *copyright
#if 0
= "(C) Copyright 1995, 1996, 1997, 1998\nPasquale J. Villani\nAll Rights Reserved\n";
#else
;
#endif
GLOBAL BYTE *os_release
#ifdef MAIN
#if 0
= "DOS-C version %d.%d Beta %d [FreeDOS Release] (Build %d).\n\
\n\
DOS-C is free software; you can redistribute it and/or modify it under the\n\
terms of the GNU General Public License as published by the Free Software\n\
Foundation; either version 2, or (at your option) any later version.\n\n\
For technical information and description of the DOS-C operating system\n\
consult \"FreeDOS Kernel\" by Pat Villani, published by Miller\n\
Freeman Publishing, Lawrence KS, USA (ISBN 0-87930-436-7).\n\
\n";
#else
= "FreeDOS kernel version %d.%d.%d (Build %d) [" __DATE__ " " __TIME__ "]\n\n";
#endif
#else
;
#endif
/* Globally referenced variables - WARNING: ORDER IS DEFINED IN */
/* KERNAL.ASM AND MUST NOT BE CHANGED. DO NOT CHANGE ORDER BECAUSE THEY */
/* ARE DOCUMENTED AS UNDOCUMENTED (?) AND HAVE MANY PROGRAMS AND TSR'S */
/* ACCESSING THEM */
extern UWORD NetBios;
extern BYTE *net_name;
extern BYTE net_set_count;
extern BYTE NetDelay,
NetRetry;
extern UWORD
first_mcb, /* Start of user memory */
UMB_top,
umb_start,
uppermem_root; /* Start of umb chain ? */
extern struct dpb
FAR *DPBp; /* First drive Parameter Block */
extern sfttbl
FAR * sfthead; /* System File Table head */
extern struct dhdr
FAR *clock, /* CLOCK$ device */
FAR * syscon; /* console device */
extern WORD
maxbksize; /* Number of Drives in system */
extern struct buffer
FAR *firstbuf; /* head of buffers linked list */
extern cdstbl
FAR * CDSp; /* Current Directory Structure */
extern
struct cds FAR *current_ldt;
extern sfttbl
FAR * FCBp; /* FCB table pointer */
extern WORD
nprotfcb; /* number of protected fcbs */
extern BYTE
nblkdev, /* number of block devices */
lastdrive, /* value of last drive */
uppermem_link; /* UMB Link flag */
extern struct dhdr
nul_dev;
extern BYTE
LocalPath[PARSE_MAX + 3], /* Room for drive spec */
mem_access_mode, /* memory allocation scheme */
ErrorMode, /* Critical error flag */
InDOS, /* In DOS critical section */
OpenMode, /* File Open Attributes */
SAttr, /* Attrib Mask for Dir Search */
dosidle_flag,
Server_Call,
CritErrLocus,
CritErrAction,
CritErrClass,
VgaSet,
njoined; /* number of joined devices */
extern UWORD Int21AX;
extern COUNT CritErrCode;
extern BYTE FAR * CritErrDev;
extern struct dirent
SearchDir;
extern struct
{
COUNT nDrive;
BYTE szName[FNAME_SIZE + 1];
BYTE szExt[FEXT_SIZE + 1];
}
FcbSearchBuffer;
extern union /* Path name parsing buffer */
{
BYTE _PriPathName[128];
struct
{
BYTE _dname[NAMEMAX];
BYTE _fname[FNAME_SIZE];
BYTE _fext[FEXT_SIZE];
}
_f;
}
_PriPathBuffer;
#define PriPathName _PriPathBuffer._PriPathName
#define szDirName _PriPathBuffer._f._dname
#define szFileName _PriPathBuffer._f._fname
#define szFileExt _PriPathBuffer._f._fext
#define szPriDirName _PriPathBuffer._f._dname
#define szPriFileName _PriPathBuffer._f._fname
#define szPriFileExt _PriPathBuffer._f._fext
extern union /* Alternate path name parsing buffer */
{
BYTE _SecPathName[128];
struct
{
BYTE _dname[NAMEMAX];
BYTE _fname[FNAME_SIZE];
BYTE _fext[FEXT_SIZE];
}
_f;
}
_SecPathBuffer;
#define SecPathName _SecPathBuffer._SecPathName
#define szSecDirName _SecPathBuffer._f._dname
#define szSecFileName _SecPathBuffer._f._fname
#define szSecFileExt _SecPathBuffer._f._fext
extern UWORD
wAttr;
extern BYTE
default_drive; /* default drive for dos */
extern BYTE
TempBuffer[], /* Temporary general purpose buffer */
FAR internal_data[], /* sda areas */
FAR swap_always[], /* " " */
FAR swap_indos[], /* " " */
tsr, /* true if program is TSR */
break_flg, /* true if break was detected */
break_ena, /* break enabled flag */
FAR * dta; /* Disk transfer area (kludge) */
extern seg
cu_psp; /* current psp segment */
extern iregs
FAR * user_r; /* User registers for int 21h call */
extern struct dirent /* Temporary directory entry */
DirEntBuffer;
extern request /* I/O Request packets */
CharReqHdr,
IoReqHdr,
MediaReqHdr;
extern fcb
FAR * lpFcb; /* Pointer to users fcb */
extern sfttbl
FAR * lpCurSft;
extern BYTE
verify_ena, /* verify enabled flag */
switchar, /* switch char */
return_mode, /* Process termination rets */
return_code; /* " " " */
extern BYTE
BootDrive, /* Drive we came up from */
scr_pos; /* screen position for bs, ht, etc */
extern WORD
NumFloppies; /* How many floppies we have */
extern keyboard
kb_buf;
extern struct cds
TempCDS;
/* start of uncontrolled variables */
GLOBAL seg
RootPsp; /* Root process -- do not abort */
GLOBAL struct f_node
*pDirFileNode;
GLOBAL iregs error_regs; /* registers for dump */
GLOBAL WORD
dump_regs; /* dump registers of bad call */
GLOBAL struct dpb
blk_devices[NDEVS];
GLOBAL struct f_node FAR
* f_nodes; /* pointer to the array */
GLOBAL struct buffer
FAR *lastbuf; /* tail of ditto */
/* FAR * buffers; /* pointer to array of track buffers */
GLOBAL BYTE /* scratchpad used for working around */
FAR * dma_scratch; /* DMA transfers during disk I/O */
GLOBAL iregs
FAR * ustackp, /* user stack */
FAR * kstackp; /* kernel stack */
/* Start of configuration variables */
GLOBAL struct config
{
UBYTE cfgBuffers; /* number of buffers in the system */
UBYTE cfgFiles; /* number of available files */
UBYTE cfgFcbs; /* number of available FCBs */
UBYTE cfgProtFcbs; /* number of protected FCBs */
BYTE cfgInit[NAMEMAX]; /* init of command.com */
BYTE cfgInitTail[NAMEMAX]; /* command.com's tail */
BYTE cfgLastdrive; /* last drive */
BYTE cfgStacks; /* number of stacks */
UWORD cfgStackSize; /* stacks size for each stack */
/* COUNTRY=
In Pass #1 these information is collected and in PostConfig()
the NLS package is loaded into memory.
-- 2000/06/11 ska*/
WORD cfgCSYS_cntry; /* country ID to be loaded */
WORD cfgCSYS_cp; /* requested codepage; NLS_DEFAULT if default */
BYTE cfgCSYS_fnam[NAMEMAX]; /* filename of COUNTRY= */
WORD cfgCSYS_memory; /* number of bytes required for the NLS pkg;
0 if none */
VOID FAR *cfgCSYS_data; /* where the loaded data is for PostConfig() */
} Config
#ifdef MAIN
=
{
NUMBUFF,
NFILES,
NFCBS,
0,
"command.com",
" /P\r\n",
NLAST,
NSTACKS,
128
/* COUNTRY= is initialized within DoConfig() */
,0 /* country ID */
,0 /* codepage */
,"" /* filename */
,0 /* amount required memory */
,0 /* pointer to loaded data */
};
#else
;
#endif
/* */
/* Function prototypes - automatically generated */
/* */
#include "proto.h"
/* Process related functions - not under automatic generation. */
/* Typically, these are in ".asm" files. */
VOID
FAR cpm_entry(VOID),
INRPT FAR re_entry(VOID) /*,
INRPT FAR handle_break(VOID) */ ;
VOID
enable(VOID),
disable(VOID);
COUNT
CriticalError(
COUNT nFlag, COUNT nDrive, COUNT nError, struct dhdr FAR * lpDevice);
#ifdef PROTO
VOID FAR CharMapSrvc(VOID);
VOID FAR set_stack(VOID);
VOID FAR restore_stack(VOID);
#ifndef IN_INIT_MOD
WORD execrh(request FAR *, struct dhdr FAR *);
#endif
VOID FAR init_call_execrh(request FAR *, struct dhdr FAR *);
VOID FAR reloc_call_execrh(request FAR *, struct dhdr FAR *);
VOID exit(COUNT);
/*VOID INRPT FAR handle_break(VOID); */
VOID tmark(VOID);
BOOL tdelay(LONG);
BYTE FAR *device_end(VOID);
COUNT kb_data(VOID);
COUNT kb_input(VOID);
COUNT kb_init(VOID);
VOID setvec(UWORD, VOID(INRPT FAR *) ());
BYTE FAR *getvec(UWORD);
COUNT con(COUNT);
VOID getdirent(BYTE FAR *, struct dirent FAR *);
VOID putdirent(struct dirent FAR *, BYTE FAR *);
#else
VOID FAR CharMapSrvc();
VOID FAR set_stack();
VOID FAR restore_stack();
WORD execrh();
VOID exit();
/*VOID INRPT FAR handle_break(); */
VOID tmark();
BOOL tdelay();
BYTE FAR *device_end();
COUNT kb_data();
COUNT kb_input();
COUNT kb_init();
VOID setvec();
BYTE FAR *getvec();
COUNT con();
VOID getdirent();
VOID putdirent();
#endif
/* */
/* special word packing prototypes */
/* */
#ifdef NATIVE
#define getlong(vp, lp) (*(LONG *)(lp)=*(LONG *)(vp))
#define getword(vp, wp) (*(WORD *)(wp)=*(WORD *)(vp))
#define getbyte(vp, bp) (*(BYTE *)(bp)=*(BYTE *)(vp))
#define fgetlong(vp, lp) (*(LONG FAR *)(lp)=*(LONG FAR *)(vp))
#define fgetword(vp, wp) (*(WORD FAR *)(wp)=*(WORD FAR *)(vp))
#define fgetbyte(vp, bp) (*(BYTE FAR *)(bp)=*(BYTE FAR *)(vp))
#define fputlong(lp, vp) (*(LONG FAR *)(vp)=*(LONG FAR *)(lp))
#define fputword(wp, vp) (*(WORD FAR *)(vp)=*(WORD FAR *)(wp))
#define fputbyte(bp, vp) (*(BYTE FAR *)(vp)=*(BYTE FAR *)(bp))
#else
#ifdef PROTO
VOID getword(VOID *, WORD *);
VOID getbyte(VOID *, BYTE *);
VOID fgetlong(VOID FAR *, LONG FAR *);
VOID fgetword(VOID FAR *, WORD FAR *);
VOID fgetbyte(VOID FAR *, BYTE FAR *);
VOID fputlong(LONG FAR *, VOID FAR *);
VOID fputword(WORD FAR *, VOID FAR *);
VOID fputbyte(BYTE FAR *, VOID FAR *);
#else
VOID getword();
VOID getbyte();
VOID fgetlong();
VOID fgetword();
VOID fgetbyte();
VOID fputlong();
VOID fputword();
VOID fputbyte();
#endif
#endif
#ifdef I86
#define setvec(n, isr) (void)(*(VOID (INRPT FAR * FAR *)())(4 * (n)) = (isr))
#endif
/*#define is_leap_year(y) ((y) & 3 ? 0 : (y) % 100 ? 1 : (y) % 400 ? 0 : 1) */
/* ^Break handling */
void FAR _init_call_spawn_int23(void); /* procsupt.asm */
int control_break(void); /* break.c */
void handle_break(void); /* break.c */
GLOBAL BYTE ReturnAnyDosVersionExpected;
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