/* SCCSID = @(#)vm.h 4.2 86/07/21 */
/*
* vm.h
*
* The following macros are used to define
* the virtual memory model.
*/
/* Definition for FPN type (file page number */
typedef unsigned short FPN;
#define LG2FPN 1
/* Length of long in bits */
#define LONGLN (BYTELN*sizeof(long))
/* Log (base 2) of page size */
#define LG2PAG 9
/* Log (base 2) of memory size */
#define LG2MEM 31
/* Length of page in bytes */
#define PAGLEN (1U << LG2PAG)
/* Page offset of virtual address */
#define OFFSET(x) ((short)((x) & ~(~0L << LG2PAG)))
/* Page number of virtual address */
#define PAGE(x) ((x) >> LG2PAG)
/* Virtual address of page table entry for some virtual address x */
#define PTADDR(x) (((x) >> (LG2PAG - LG2FPN)) & (~0L << LG2FPN))
/* Page number of page table entry for some virtual address x */
#define PTPAGE(x) ((x) >> (LG2PAG + LG2PAG - LG2FPN))
/* Upper virtual address limit of PT0 */
#define LG2LP0 (LG2MEM - LG2PAG + LG2FPN)
#define LIMPT0 (1L << LG2LP0)
/* Upper virtual address limit of PT1 */
#define LG2LP1 (LG2LP0 - LG2PAG + LG2FPN)
#define LIMPT1 (1L << LG2LP1)
/* Upper virtual address limit of PT2 */
#define LG2LP2 (LG2LP1 - LG2PAG + LG2FPN)
#define LIMPT2 (1L << LG2LP2)
/* Length of PT2 in entries (longs) */
#define PT2LEN (1L << (LG2LP1 - LG2PAG))
/* Maximum number of page buffers (hash table can be chars if MAXBUF <= 128) */
#if CPU386
#define MAXBUF 128
#elif OSEGEXE
#define MAXBUF 96
#else
#define MAXBUF 64
#endif
/* Virtual memory area definitions */
/*
* REMEMBER !!!!!!!!!!!!!!!!!!
*
* EVERY item you store in virtual memory MUST !!!!!
* meet the condition PAGLEN % sizeof(your-item) == 0.
*/
#define AREASYMS LIMPT0 /* Symbol table VM area start */
#define AREASRCLIN (AREASYMS + (RBMAX << SYMSCALE))
/* $$SRCLINES area start */
#define AREAPROPLST (AREASRCLIN + (1L << 20))
#define AREABAKPAT (AREAPROPLST + LXIVK)
#if EXE386
/* Begin area definitions for linear-executable */
#define AREAIMPS (AREABAKPAT + LXIVK)
/* Imported names table area */
#define AREAEAT (AREAIMPS + 10*MEGABYTE)
/* Export Address Table area */
#define AREAEATAUX (AREAEAT + MEGABYTE)
/* Auxiliary Data Table area */
#define AREAEP (AREAEATAUX + MEGABYTE)
/* Entry point area */
#define LG2BKT 6 /* Log of hash bucket size */
#define BKTLEN (1 << LG2BKT) /* Bucket length in bytes */
#define AREAHRC (AREAEP + (LXIVK * sizeof(EPTYPE)))
/* Chained relocation hash tables */
#define AREARC (AREAHRC + MEGABYTE)
/* Chained relocation hash buckets */
#define AREANAMEPTR (AREARC + ((long) BKTLEN << WORDLN))
/* Export Name Pointer Table */
#define NAMEPTRSIZE MEGABYTE /* 1Mb */
#define AREAORD (AREANAMEPTR + NAMEPTRSIZE)
/* Export Ordinal Table */
#define ORDTABSIZE 8*LXIVK /* 0.5Mb */
#define AREAEXPNAME (AREAORD + ORDTABSIZE)
/* Export Name Table */
#define EXPNAMESIZE 64*MEGABYTE /* 64Mb */
#define AREAST (AREAEXPNAME + EXPNAMESIZE)
#define AREAMOD (AREAST + LXIVK)
/* Module Reference Table Area */
#define AREAHD (AREAMOD + MEGABYTE)
#define AREAPDIR (AREAHD + MEGABYTE)
#define AREAIMPMOD (AREAPDIR + MEGABYTE)
#define AREAFPAGE (AREAIMPMOD + MEGABYTE)
#define AREACV (AREAFPAGE + MEGABYTE)
#define AREASORT (AREACV + (32*MEGABYTE))
#define AREAEXESTR (AREASORT + LXIVK)
#define AREACONTRIBUTION (AREAEXESTR + LXIVK)
#define AREAPAGERANGE (AREACONTRIBUTION + LXIVK)
#define AREACVDNT (AREAPAGERANGE + (8*MEGABYTE))
#define AREAFSA (AREACVDNT + LXIVK)
/* Segment area start */
#define AREASA(sa) (mpsaVMArea[sa]) /* Virtual address of nth object */
#define AREAFREE (0xffffffffL)
/* First free VM address */
#else
/* Begin area definitions for protect-mode exes */
#define AREANRNT (AREABAKPAT + LXIVK)
#define AREARNT (AREANRNT + LXIVK)
#define AREAIMPS (AREARNT + LXIVK)
/* Imported names table area */
#define AREAET (AREAIMPS + LXIVK)
/* Entry Table area */
#define AREAEP (AREAET + LXIVK)/* Entry point area */
#define LG2BKT 6 /* Log of hash bucket size */
#define BKTLEN (1 << LG2BKT) /* Bucket length in bytes */
#define AREAHRC (AREAEP + (LXIVK * sizeof(EPTYPE)))
/* Chained relocation hash tables */
#define AREARC (AREAHRC + ((long) SAMAX * PAGLEN / 2))
/* Chained relocation hash buckets */
#define AREAST (AREARC + ((long) BKTLEN << WORDLN))
#define AREAMOD (AREAST + LXIVK)/* Module Reference Table Area */
#define AREASORT (AREAMOD + LXIVK)
#define AREAEXESTR (AREASORT + (LXIVK << 2))
#define AREACONTRIBUTION (AREAEXESTR + LXIVK)
#define AREACVDNT (AREACONTRIBUTION + LXIVK)
#define AREAFSA (AREACVDNT + LXIVK)
#define AREASA(sa) (AREAFSA + ((long) (sa) << WORDLN))
/* Virtual address of nth segment */
#define AREAFREE (AREAFSA + ((long) SAMAX << WORDLN))
/* First free VM address */
#define AREACV (AREAPACKRGRLE + MEGABYTE)
#endif
/* Virtual memory area definitions for DOS 3 exes */
#define AREAFSG AREAFSA /* Segment area start */
#define AREARGRLE (AREAFSG + ((long) GSNMAX << 16))
/* Relocation table area start */
#define LG2ARLE 17 /* Log (base 2) of reloc table size */
#define AREAPACKRGRLE (AREARGRLE + (IOVMAX * (1L << LG2ARLE)))
/* Packed relocation area start */
#define VPLIB1ST (1L << (LG2MEM - LG2PAG))
/* First page of library area
* NOTE: This page number cannot
* be derived from any legal virtual
* address. Libraries will always be
* accessed by page number.
*/
/* Index of virtual page touched most recently */
short picur;