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/* This is file PAGING.H */
/*
** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
**
** This file is distributed under the terms listed in the document
** "copying.dj", available from DJ Delorie at the address above.
** A copy of "copying.dj" should accompany this file; if not, a copy
** should be available from where this file was obtained. This file
** may not be distributed without a verbatim copy of "copying.dj".
**
** This file is distributed WITHOUT ANY WARRANTY; without even the implied
** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef _PAGING_H_
#define _PAGING_H_
/* active if set */
#define PT_P 0x001 /* present (else not) */
#define PT_W 0x002 /* writable (else read-only) */
#define PT_U 0x004 /* user mode (else kernel mode) */
#define PT_A 0x020 /* accessed (else not) */
#define PT_D 0x040 /* dirty (else clean) */
#define PT_I 0x200 /* Initialized (else not read from a.out file yet) */
#define PT_S 0x400 /* Swappable (else not) */
#define PT_C 0x800 /* Candidate for swapping */
#define EMU_TEXT 0xb0000000L
/* If not present and initialized, page is in swap file.
** If not present and not initialized, page is in a.out file.
*/
void paging_set_file(char *fname);
word32 ptr2linear(void far *ptr);
word32 paging_brk(word32 b);
word32 paging_sbrk(int32 b);
word32 stack_used(void);
void clearDPMIstate(void);
int page_in(void);
unsigned page_out(int);
int page_is_valid(word32 vaddr);
void page_in_everything(void);
void page_out_everything(void);
int emu_install(char *filename); /* returns 1 if installed, 0 if not */
word32 emu_start_ip(void);
typedef struct AREAS {
word32 first_addr; /* in linear space, not program space */
word32 last_addr; /* in linear space, not program space */
word32 foffset; /* corresponding to first_addr; -1 = zero fill only */
word16 fileno; /* which file to get pages from */
word16 filler;
} AREAS;
typedef enum {
A_text,
A_data,
A_bss,
A_arena,
A_stack,
A_vga,
A_syms,
A_syms2,
A_emu,
A_max
} AREA_TYPES;
#define MAX_AREA 9
extern AREAS areas[MAX_AREA];
void loadAout(const AREAS* areas);
#endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.