git.mutantstargoat.com Git - dosdemo/blob - src/dos/cdpmi.h

   1 #ifndef DPMI_H_
   2 #define DPMI_H_
   3
   4 #ifdef __DJGPP__
   5 #include <dpmi.h>
   6 #endif
   7
   8 #include "inttypes.h"
   9
  10 struct dpmi_regs {
  11         uint32_t edi, esi, ebp;
  12         uint32_t reserved;
  13         uint32_t ebx, edx, ecx, eax;
  14         uint16_t flags;
  15         uint16_t es, ds, fs, gs;
  16         uint16_t ip, cs, sp, ss;
  17 };
  18
  19 uint16_t dpmi_alloc(unsigned int par, uint16_t *sel);
  20 void dpmi_free(uint16_t sel);
  21 void dpmi_int(int inum, struct dpmi_regs *regs);
  22 void *dpmi_mmap(uint32_t phys_addr, unsigned int size);
  23 void dpmi_munmap(void *addr);
  24
  25 #ifdef __WATCOMC__
  26 #pragma aux dpmi_alloc = \
  27                 "mov ax, 0x100" \
  28                 "int 0x31" \
  29                 "mov [edi], dx" \
  30                 value[ax] \
  31                 parm[ebx][edi];
  32
  33 #pragma aux dpmi_free = \
  34                 "mov ax, 0x101" \
  35                 "int 0x31" \
  36                 parm[dx] \
  37                 modify[ax];
  38
  39 #pragma aux dpmi_int = \
  40                 "mov ax, 0x300" \
  41                 "xor ecx, ecx" \
  42                 "int 0x31" \
  43                 parm[ebx][edi] \
  44                 modify[ax ecx];
  45
  46 #pragma aux dpmi_mmap = \
  47                 "mov ax, 0x800" \
  48                 "mov cx, bx" \
  49                 "shr ebx, 16" \
  50                 "mov di, si" \
  51                 "shr esi, 16" \
  52                 "int 0x31" \
  53                 "jnc mmap_skip_err" \
  54                 "xor bx, bx" \
  55                 "xor cx, cx" \
  56         "mmap_skip_err:" \
  57                 "mov ax, bx" \
  58                 "shl eax, 16" \
  59                 "mov ax, cx" \
  60                 value[eax] \
  61                 parm[ebx][esi] \
  62                 modify[cx di];
  63
  64 #pragma aux dpmi_munmap = \
  65                 "mov ax, 0x801" \
  66                 "mov cx, bx" \
  67                 "shr ebx, 16" \
  68                 "int 0x31" \
  69                 parm[ebx] \
  70                 modify[ax];
  71 #endif  /* __WATCOMC__ */
  72
  73 #ifdef __DJGPP__
  74 #define dpmi_int(inum, regs) __dpmi_int((inum), (__dpmi_regs*)(regs))
  75 #endif
  76
  77 #endif  /* DPMI_H_ */