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

   1 #ifndef AROS_ARM_CPU_H
   2 #define AROS_ARM_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.h include file for arm-le systems
  11     Lang: english
  12 */
  13
  14 /* Translate __ARM_ARCH_X__ definitions to a common one. Makes it easier to write conditional code. */
  15 #ifdef __ARM_ARCH_2__
  16 #define __ARM_ARCH__ 2
  17 #endif
  18 #ifdef __ARM_ARCH_3__
  19 #define __ARM_ARCH__ 3
  20 #endif
  21 #ifdef __ARM_ARCH_4__
  22 #define __ARM_ARCH__ 4
  23 #endif
  24 #ifdef __ARM_ARCH_5__
  25 #define __ARM_ARCH__ 5
  26 #endif
  27 #ifdef __ARM_ARCH_6__
  28 #define __ARM_ARCH__ 6
  29 #endif
  30 #ifdef __ARM_ARCH_7A__
  31 #define __ARM_ARCH__ 7
  32 #endif
  33
  34 /* Information about size and alignment,
  35  * the defines have to be numeric constants */
  36 #define AROS_STACK_GROWS_DOWNWARDS 1 /* Stack direction */
  37 #define AROS_BIG_ENDIAN            0 /* Big or little endian */
  38 #define AROS_SIZEOFULONG           4 /* Size of an ULONG */
  39 #define AROS_SIZEOFPTR             4 /* Size of a PTR */
  40 #define AROS_WORDALIGN             2 /* Alignment for WORD */
  41 #define AROS_LONGALIGN             4 /* Alignment for LONG */
  42 #define AROS_QUADALIGN             4 /* Alignment for QUAD */
  43 #define AROS_PTRALIGN              4 /* Alignment for PTR */
  44 #define AROS_IPTRALIGN             4 /* Alignment for IPTR */
  45 #define AROS_DOUBLEALIGN           4 /* Alignment for double */
  46 #define AROS_WORSTALIGN           16 /* Worst case alignment */
  47 #define AROS_STACKALIGN           16 /* FIXME: is this really needed? */
  48
  49 /* define this if we have no support for linear varargs in the compiler */
  50 #define NO_LINEAR_VARARGS       1
  51
  52 /* Do not use patched compiler. */
  53 #define AROS_SLOWSTACKTAGS      1
  54 #define AROS_SLOWSTACKMETHODS   1
  55 #define AROS_SLOWSTACKHOOKS     1
  56
  57 #define AROS_32BIT_TYPE         int
  58
  59 /* Use C pointer and string for the BCPL pointers and strings
  60  * For a normal ABI these should not be defined for maximum source code
  61  * compatibility.
  62  */
  63 #define AROS_FAST_BPTR 1
  64 #define AROS_FAST_BSTR 1
  65
  66 /* do we need a function attribute to get parameters on the stack? */
  67 #define __stackparm
  68
  69 /* types and limits for sig_atomic_t */
  70 #define AROS_SIG_ATOMIC_T       int
  71 #define AROS_SIG_ATOMIC_MIN     (-0x7fffffff-1)
  72 #define AROS_SIG_ATOMIC_MAX     0x7fffffff
  73
  74 #if defined(__GNUC__) && !defined(__clang__)
  75 register unsigned char* AROS_GET_SP __asm__("%sp");
  76 #endif
  77
  78 /*
  79     One entry in a libraries' jumptable. For assembler compatibility, the
  80     field jmp should contain the code for an absolute jmp to a 32bit
  81     address. There are also a couple of macros which you should use to
  82     access the vector table from C.
  83 */
  84 struct FullJumpVec
  85 {
  86     unsigned long jmp;
  87     unsigned long vec;
  88 };
  89 #define __AROS_SET_FULLJMP(v,a) \
  90 do \
  91 {  \
  92     struct FullJumpVec *_v = (v); \
  93     _v->jmp = 0xe51ff004;               /* ldr pc, [pc, #-4] */         \
  94     _v->vec = (ULONG)(a);               /* .word target_address */      \
  95 } while (0)
  96
  97 struct JumpVec
  98 {
  99         void * vec;
 100 };
 101
 102 /* Use these to acces a vector table */
 103 #define LIB_VECTSIZE                    (sizeof (struct JumpVec))
 104 #define __AROS_GETJUMPVEC(lib,n)        (&((struct JumpVec *)lib)[-(n)])
 105 #define __AROS_GETVECADDR(lib,n)        (__AROS_GETJUMPVEC(lib,n)->vec)
 106 #define __AROS_SETVECADDR(lib,n,addr)   (__AROS_GETJUMPVEC(lib,n)->vec = (addr))
 107 #define __AROS_INITVEC(lib,n)           __AROS_SETVECADDR(lib,n,_aros_not_implemented)
 108
 109 /* Register preservation is still useful. At least for stack swapping functions. */
 110 #undef UseExecstubs
 111 #define UseExecstubs 1
 112
 113 /* Macros to test/set failure of AllocEntry() */
 114 #define AROS_ALLOCENTRY_FAILED(memType) \
 115         ((struct MemList *)((IPTR)(memType) | 0x80ul<<(sizeof(APTR)-1)*8))
 116 #define AROS_CHECK_ALLOCENTRY(memList) \
 117         (!((IPTR)(memList) & 0x80ul<<(sizeof(APTR)-1)*8))
 118
 119 /*
 120     Find the next valid alignment for a structure if the next x bytes must
 121     be skipped.
 122 */
 123 #define AROS_ALIGN(x)        (((x)+AROS_WORSTALIGN-1)&-AROS_WORSTALIGN)
 124
 125 /* Prototypes */
 126 extern void _aros_not_implemented ();
 127 extern void aros_not_implemented ();
 128
 129 /* How much stack do we need ? Lots :-) */
 130 #define AROS_STACKSIZE  40960
 131
 132 /* How to map function arguments to CPU registers */
 133 /*
 134     The ARM processor does have enough registers to map the m68k
 135     register set onto them but we will ignore this and use the compiler's calling
 136     convention. The library base is mapped to the last argument so that
 137     it can be ignored by the function.
 138 */
 139
 140 /* What to do with the library base in header, prototype and call */
 141 #define __AROS_LH_BASE(basetype,basename)   basetype basename
 142 #define __AROS_LP_BASE(basetype,basename)   void *
 143 #define __AROS_LC_BASE(basetype,basename)   basename
 144 #define __AROS_LD_BASE(basetype,basename)   basetype
 145
 146 /* How to transform an argument in header, opt prototype, call and forced
 147    prototype. */
 148 #define __AROS_LHA(type,name,reg)     type name
 149 #define __AROS_LPA(type,name,reg)     type
 150 #define __AROS_LCA(type,name,reg)     name
 151 #define __AROS_LDA(type,name,reg)     type
 152 #define __AROS_UFHA(type,name,reg)    type name
 153 #define __AROS_UFPA(type,name,reg)    type
 154 #define __AROS_UFCA(type,name,reg)    name
 155 #define __AROS_UFDA(type,name,reg)    type
 156 #define __AROS_LHAQUAD(type,name,reg1,reg2)     type name
 157 #define __AROS_LPAQUAD(type,name,reg1,reg2)     type
 158 #define __AROS_LCAQUAD(type,name,reg1,reg2)     name
 159 #define __AROS_LDAQUAD(type,name,reg1,reg2)     type
 160
 161 /* Prefix for library function in header, prototype and call */
 162 #define __AROS_LH_PREFIX    /* eps */
 163 #define __AROS_LP_PREFIX    /* eps */
 164 #define __AROS_LC_PREFIX    /* eps */
 165 #define __AROS_LD_PREFIX    /* eps */
 166 #define __AROS_UFH_PREFIX   /* eps */
 167 #define __AROS_UFP_PREFIX   /* eps */
 168 #define __AROS_UFC_PREFIX   /* eps */
 169 #define __AROS_UFD_PREFIX   /* eps */
 170
 171 /*
 172  * This must be placed before every call to host OS on hosted AROS.
 173  * On ARM it tells that r9 register is clobbered. Some OSes (iOS again)
 174  * define r9 as volatile. It can be used as scratchpad but calls will
 175  * not preserve it.
 176  * AROS code expects it is nonvolatile (as defined in the AAPCS).
 177  */
 178 #define AROS_HOST_BARRIER asm volatile("":::"r9");
 179
 180 #endif /* AROS_ARM_CPU_H */