reactos/boot/freeldr/freeldr/include/arch/pc/pcbios.h

   1 #ifndef __ASM__
   2
   3 #include <pshpack1.h>
   4 typedef struct
   5 {
   6         unsigned long   eax;
   7         unsigned long   ebx;
   8         unsigned long   ecx;
   9         unsigned long   edx;
  10
  11         unsigned long   esi;
  12         unsigned long   edi;
  13
  14         unsigned short  ds;
  15         unsigned short  es;
  16         unsigned short  fs;
  17         unsigned short  gs;
  18
  19         unsigned long   eflags;
  20
  21 } DWORDREGS;
  22
  23 typedef struct
  24 {
  25         unsigned short  ax, _upper_ax;
  26         unsigned short  bx, _upper_bx;
  27         unsigned short  cx, _upper_cx;
  28         unsigned short  dx, _upper_dx;
  29
  30         unsigned short  si, _upper_si;
  31         unsigned short  di, _upper_di;
  32
  33         unsigned short  ds;
  34         unsigned short  es;
  35         unsigned short  fs;
  36         unsigned short  gs;
  37
  38         unsigned short  flags, _upper_flags;
  39
  40 } WORDREGS;
  41
  42 typedef struct
  43 {
  44         unsigned char   al;
  45         unsigned char   ah;
  46         unsigned short  _upper_ax;
  47         unsigned char   bl;
  48         unsigned char   bh;
  49         unsigned short  _upper_bx;
  50         unsigned char   cl;
  51         unsigned char   ch;
  52         unsigned short  _upper_cx;
  53         unsigned char   dl;
  54         unsigned char   dh;
  55         unsigned short  _upper_dx;
  56
  57         unsigned short  si, _upper_si;
  58         unsigned short  di, _upper_di;
  59
  60         unsigned short  ds;
  61         unsigned short  es;
  62         unsigned short  fs;
  63         unsigned short  gs;
  64
  65         unsigned short  flags, _upper_flags;
  66
  67 } BYTEREGS;
  68
  69
  70 typedef union
  71 {
  72         DWORDREGS       x;
  73         DWORDREGS       d;
  74         WORDREGS        w;
  75         BYTEREGS        b;
  76 } REGS;
  77 #include <poppack.h>
  78
  79 // Int386()
  80 //
  81 // Real mode interrupt vector interface
  82 //
  83 // (E)FLAGS can *only* be returned by this function, not set.
  84 // Make sure all memory pointers are in SEG:OFFS format and
  85 // not linear addresses, unless the interrupt handler
  86 // specifically handles linear addresses.
  87 int             Int386(int ivec, REGS* in, REGS* out);
  88
  89 // This macro tests the Carry Flag
  90 // If CF is set then the call failed (usually)
  91 #define INT386_SUCCESS(regs)    ((regs.x.eflags & EFLAGS_CF) == 0)
  92
  93 void    EnableA20(void);
  94 VOID    ChainLoadBiosBootSectorCode(VOID);      // Implemented in boot.S
  95 VOID    SoftReboot(VOID);                                       // Implemented in boot.S
  96 VOID    DetectHardware(VOID);           // Implemented in hardware.c
  97
  98 #endif /* ! __ASM__ */