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 typedef  unsigned char cpuid_t;
  15 typedef  unsigned char apicid_t;
  16 typedef  void *cpumask_t;
  17
  18 /* Information about size and alignment,
  19  * the defines have to be numeric constants */
  20 #define AROS_STACK_GROWS_DOWNWARDS 1 /* Stack direction */
  21 #define AROS_BIG_ENDIAN            0 /* Big or little endian */
  22 #define AROS_SIZEOFULONG           4 /* Size of an ULONG */
  23 #define AROS_SIZEOFPTR             4 /* Size of a PTR */
  24 #define AROS_WORDALIGN             2 /* Alignment for WORD */
  25 #define AROS_LONGALIGN             4 /* Alignment for LONG */
  26 #define AROS_QUADALIGN             4 /* Alignment for QUAD */
  27 #define AROS_PTRALIGN              4 /* Alignment for PTR */
  28 #define AROS_IPTRALIGN             4 /* Alignment for IPTR */
  29 #define AROS_DOUBLEALIGN           4 /* Alignment for double */
  30 #define AROS_WORSTALIGN            16 /* Worst case alignment */
  31 #define AROS_STACKALIGN           16 /* Clean stack must be aligned to this */
  32
  33 #define AROS_32BIT_TYPE         int
  34
  35 /* Use C pointer and string for the BCPL pointers and strings
  36  * For a normal ABI these should not be defined for maximum source code
  37  * compatibility.
  38  */
  39 #define AROS_FAST_BPTR 1
  40 #define AROS_FAST_BSTR 1
  41
  42 /* do we need a function attribute to get parameters on the stack? */
  43 #define __stackparm
  44
  45 /* types and limits for sig_atomic_t */
  46 #define AROS_SIG_ATOMIC_T       int
  47 #define AROS_SIG_ATOMIC_MIN     (-0x7fffffff-1)
  48 #define AROS_SIG_ATOMIC_MAX     0x7fffffff
  49
  50 #ifndef __TINYC__
  51 #define AROS_GET_SP ({register unsigned char *sp asm("%esp"); sp;})
  52 #endif
  53
  54 /*
  55     One entry in a library's jumptable. For assembler compatibility, the
  56     field jmp should contain the code for an absolute jmp to a 32bit
  57     address. There are also a couple of macros which you should use to
  58     access the vector table from C.
  59 */
  60 struct FullJumpVec
  61 {
  62     unsigned char jmp;
  63     void         *vec;
  64 } __attribute__((packed));
  65
  66 #define __AROS_SET_FULLJMP(v,a) \
  67 do \
  68 {  \
  69     struct FullJumpVec *_v = v; \
  70     _v->jmp = 0xE9; \
  71     _v->vec = (void *) ((ULONG)(a) - (ULONG)(_v) - 5);\
  72 } while (0)
  73
  74 struct JumpVec
  75 {
  76     void *vec;
  77 };
  78
  79 /* Use these to access a vector table */
  80 #define LIB_VECTSIZE                    (sizeof (struct JumpVec))
  81 #define __AROS_GETJUMPVEC(lib,n)        (&((struct JumpVec *)lib)[-(n)])
  82 #define __AROS_GETVECADDR(lib,n)        (__AROS_GETJUMPVEC(lib,n)->vec)
  83 #define __AROS_SETVECADDR(lib,n,addr)   (__AROS_GETJUMPVEC(lib,n)->vec = (addr))
  84 #define __AROS_INITVEC(lib,n)           __AROS_SETVECADDR(lib,n,_aros_not_implemented)
  85
  86 /*
  87    We want to activate the execstubs and preserve all registers
  88    when calling obtainsemaphore, obtainsemaphoreshared, releasesemaphore,
  89    getcc, permit, forbid, enable, disable
  90 */
  91 #undef UseExecstubs
  92 #define UseExecstubs 1
  93
  94 /* Macros to test/set failure of AllocEntry() */
  95 #define AROS_ALLOCENTRY_FAILED(memType) \
  96         ((struct MemList *)((IPTR)(memType) | 0x80ul<<(sizeof(APTR)-1)*8))
  97 #define AROS_CHECK_ALLOCENTRY(memList) \
  98         (!((IPTR)(memList) & 0x80ul<<(sizeof(APTR)-1)*8))
  99
 100 /*
 101     Find the next valid alignment for a structure if the next x bytes must
 102     be skipped.
 103 */
 104 #define AROS_ALIGN(x)        (((x)+AROS_WORSTALIGN-1)&-AROS_WORSTALIGN)
 105
 106 /* Prototypes */
 107 extern void _aros_not_implemented ();
 108 extern void aros_not_implemented ();
 109
 110 /*
 111     How much stack do we need ? Lots :-) ?
 112     Not so much, I think (schulz) ;-))
 113 */
 114
 115 #define AROS_STACKSIZE  40960
 116
 117 /* Some defines to set the cpu specific libcall.h interface */
 118 #define __AROS_LIBCALL_H_FILE "aros/i386/libcall.h"
 119
 120 #endif /* AROS_I386_CPU_H */