arch/i386-all/include/aros/cpu.h

   1 #ifndef AROS_I386_CPU_H
   2 #define AROS_I386_CPU_H
   3
   4 /*
   5     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   6     $Id$
   7
   8     NOTE: This file must compile *without* any other header !
   9
  10     Desc: CPU-specific definitions for 32-bit x86 processors
  11     Lang: english
  12 */
  13
  14 /* Information about size and alignment,
  15  * the defines have to be numeric constants */
  16 #define AROS_STACK_GROWS_DOWNWARDS 1 /* Stack direction */
  17 #define AROS_BIG_ENDIAN            0 /* Big or little endian */
  18 #define AROS_SIZEOFULONG           4 /* Size of an ULONG */
  19 #define AROS_SIZEOFPTR             4 /* Size of a PTR */
  20 #define AROS_WORDALIGN             2 /* Alignment for WORD */
  21 #define AROS_LONGALIGN             4 /* Alignment for LONG */
  22 #define AROS_QUADALIGN             4 /* Alignment for QUAD */
  23 #define AROS_PTRALIGN              4 /* Alignment for PTR */
  24 #define AROS_IPTRALIGN             4 /* Alignment for IPTR */
  25 #define AROS_DOUBLEALIGN           4 /* Alignment for double */
  26 #define AROS_WORSTALIGN            16 /* Worst case alignment */
  27 #define AROS_STACKALIGN           16 /* Clean stack must be aligned to this */
  28
  29 #define AROS_32BIT_TYPE         int
  30
  31 /* Use C pointer and string for the BCPL pointers and strings
  32  * For a normal ABI these should not be defined for maximum source code
  33  * compatibility.
  34  */
  35 #define AROS_FAST_BPTR 1
  36 #define AROS_FAST_BSTR 1
  37
  38 /* do we need a function attribute to get parameters on the stack? */
  39 #define __stackparm
  40
  41 /* types and limits for sig_atomic_t */
  42 #define AROS_SIG_ATOMIC_T       int
  43 #define AROS_SIG_ATOMIC_MIN     (-0x7fffffff-1)
  44 #define AROS_SIG_ATOMIC_MAX     0x7fffffff
  45
  46 #ifndef __TINYC__
  47 #define AROS_GET_SP ({register unsigned char *sp asm("%esp"); sp;})
  48 #endif
  49
  50 /*
  51     One entry in a library's jumptable. For assembler compatibility, the
  52     field jmp should contain the code for an absolute jmp to a 32bit
  53     address. There are also a couple of macros which you should use to
  54     access the vector table from C.
  55 */
  56 struct FullJumpVec
  57 {
  58     unsigned char jmp;
  59     void         *vec;
  60 } __attribute__((packed));
  61
  62 #define __AROS_SET_FULLJMP(v,a) \
  63 do \
  64 {  \
  65     struct FullJumpVec *_v = v; \
  66     _v->jmp = 0xE9; \
  67     _v->vec = (void *) ((ULONG)(a) - (ULONG)(_v) - 5);\
  68 } while (0)
  69
  70 struct JumpVec
  71 {
  72     void *vec;
  73 };
  74
  75 /* Use these to access a vector table */
  76 #define LIB_VECTSIZE                    (sizeof (struct JumpVec))
  77 #define __AROS_GETJUMPVEC(lib,n)        (&((struct JumpVec *)lib)[-(n)])
  78 #define __AROS_GETVECADDR(lib,n)        (__AROS_GETJUMPVEC(lib,n)->vec)
  79 #define __AROS_SETVECADDR(lib,n,addr)   (__AROS_GETJUMPVEC(lib,n)->vec = (addr))
  80 #define __AROS_INITVEC(lib,n)           __AROS_SETVECADDR(lib,n,_aros_not_implemented)
  81
  82 /*
  83    We want to activate the execstubs and preserve all registers
  84    when calling obtainsemaphore, obtainsemaphoreshared, releasesemaphore,
  85    getcc, permit, forbid, enable, disable
  86 */
  87 #undef UseExecstubs
  88 #define UseExecstubs 1
  89
  90 /* Macros to test/set failure of AllocEntry() */
  91 #define AROS_ALLOCENTRY_FAILED(memType) \
  92         ((struct MemList *)((IPTR)(memType) | 0x80ul<<(sizeof(APTR)-1)*8))
  93 #define AROS_CHECK_ALLOCENTRY(memList) \
  94         (!((IPTR)(memList) & 0x80ul<<(sizeof(APTR)-1)*8))
  95
  96 /*
  97     Find the next valid alignment for a structure if the next x bytes must
  98     be skipped.
  99 */
 100 #define AROS_ALIGN(x)        (((x)+AROS_WORSTALIGN-1)&-AROS_WORSTALIGN)
 101
 102 /* Prototypes */
 103 extern void _aros_not_implemented ();
 104 extern void aros_not_implemented ();
 105
 106 /*
 107     How much stack do we need ? Lots :-) ?
 108     Not so much, I think (schulz) ;-))
 109 */
 110
 111 #define AROS_STACKSIZE  40960
 112
 113 /* Some defines to set the cpu specific libcall.h interface */
 114 #define __AROS_LIBCALL_H_FILE "aros/i386/libcall.h"
 115
 116 #endif /* AROS_I386_CPU_H */