include/segmem.h

   1 /* $Id: segmem.h,v 1.3 1993/07/04 04:04:21 root Exp root $
   2  */
   3 /*
   4  * Copyright  Robert J. Amstadt, 1993
   5  */
   6 #ifndef SEGMEM_H
   7 #define SEGMEM_H
   8
   9 #include "wine.h"
  10
  11 #ifdef __linux__
  12 #define HAVE_IPC
  13 #include <sys/ipc.h>
  14 #include <sys/shm.h>
  15 #endif
  16
  17 #if defined(__NetBSD__) || defined(__FreeBSD__)
  18 #define HAVE_IPC
  19 #include <sys/types.h>
  20 #include <sys/ipc.h>
  21 #include <sys/shm.h>
  22 #define SHMSEG 32     /* XXX SEMMNI /usr/src/sys/conf/param.h */
  23 #define SHM_RANGE_START       0x40000000
  24 #endif
  25
  26 /*
  27  * Array to track selector allocation.
  28  */
  29 #define MAX_SELECTORS           512
  30 #define SELECTOR_ISFREE         0x8000
  31 #define SELECTOR_INDEXMASK      0x0fff
  32
  33 extern unsigned short SelectorMap[MAX_SELECTORS];
  34
  35 #ifdef HAVE_IPC
  36 #define SAFEMAKEPTR(s, o) ((void *)(((int) (s) << 16) | ((o) & 0xffff)))
  37 #define FIXPTR(p)         (p)
  38 #else
  39 #define SAFEMAKEPTR(s, o) \
  40     ((void *)(((int)SelectorMap[SelectorMap[(s) >> 3] & SELECTOR_INDEXMASK] \
  41                     << 19) | 0x70000 | ((o) & 0xffff)))
  42 #define FIXPTR(p)         SAFEMAKEPTR((unsigned long) (p) >> 16, (p))
  43 #endif
  44
  45 /*
  46  * Structure to hold info about each selector we create.
  47  */
  48
  49 typedef struct segment_descriptor_s
  50 {
  51     void          *base_addr;   /* Pointer to segment in flat memory    */
  52     unsigned int   length;      /* Length of segment                    */
  53     unsigned int   flags;       /* Segment flags (see neexe.h and below)*/
  54     unsigned short selector;    /* Selector used to access this segment */
  55     unsigned short owner;       /* Handle of owner program              */
  56     unsigned char  type;        /* DATA or CODE                         */
  57 #ifdef HAVE_IPC
  58     key_t          shm_key;     /* Shared memory key or -1              */
  59 #endif
  60 } SEGDESC;
  61
  62 extern int IPCCopySelector(int i_old, unsigned long new, int swap_type);
  63
  64 /*
  65  * Additional flags
  66  */
  67 #define NE_SEGFLAGS_MALLOCED    0x00010000 /* Memory allocated with malloc() */
  68
  69 /*
  70  * Global memory flags
  71  */
  72 #define GLOBAL_FLAGS_MOVEABLE           0x0002
  73 #define GLOBAL_FLAGS_ZEROINIT           0x0040
  74 #define GLOBAL_FLAGS_CODE               0x00010000
  75 #define GLOBAL_FLAGS_EXECUTEONLY        0x00020000
  76 #define GLOBAL_FLAGS_READONLY           0x00020000
  77
  78 #define FIRST_SELECTOR  8
  79
  80 #define IS_16_BIT_ADDRESS(addr)  \
  81      ((unsigned int)(addr) >= (((FIRST_SELECTOR << 3) | 0x0007) << 16))
  82
  83 extern SEGDESC Segments[];
  84
  85 #endif /* SEGMEM_H */