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