kernel/arch/arm/include/asm/unified.h

   1 /*
   2  * include/asm-arm/unified.h - Unified Assembler Syntax helper macros
   3  *
   4  * Copyright (C) 2008 ARM Limited
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 #ifndef __ASM_UNIFIED_H
  21 #define __ASM_UNIFIED_H
  22
  23 #if defined(__ASSEMBLY__) && defined(CONFIG_ARM_ASM_UNIFIED)
  24         .syntax unified
  25 #endif
  26
  27 #ifdef CONFIG_CPU_V7M
  28 #define AR_CLASS(x...)
  29 #define M_CLASS(x...)   x
  30 #else
  31 #define AR_CLASS(x...)  x
  32 #define M_CLASS(x...)
  33 #endif
  34
  35 #ifdef CONFIG_THUMB2_KERNEL
  36
  37 #if __GNUC__ < 4
  38 #error Thumb-2 kernel requires gcc >= 4
  39 #endif
  40
  41 /* The CPSR bit describing the instruction set (Thumb) */
  42 #define PSR_ISETSTATE   PSR_T_BIT
  43
  44 #define ARM(x...)
  45 #define THUMB(x...)     x
  46 #ifdef __ASSEMBLY__
  47 #define W(instr)        instr.w
  48 #define BSYM(sym)       sym + 1
  49 #else
  50 #define WASM(instr)     #instr ".w"
  51 #endif
  52
  53 #else   /* !CONFIG_THUMB2_KERNEL */
  54
  55 /* The CPSR bit describing the instruction set (ARM) */
  56 #define PSR_ISETSTATE   0
  57
  58 #define ARM(x...)       x
  59 #define THUMB(x...)
  60 #ifdef __ASSEMBLY__
  61 #define W(instr)        instr
  62 #define BSYM(sym)       sym
  63 #else
  64 #define WASM(instr)     #instr
  65 #endif
  66
  67 #endif  /* CONFIG_THUMB2_KERNEL */
  68
  69 #ifndef CONFIG_ARM_ASM_UNIFIED
  70
  71 /*
  72  * If the unified assembly syntax isn't used (in ARM mode), these
  73  * macros expand to an empty string
  74  */
  75 #ifdef __ASSEMBLY__
  76         .macro  it, cond
  77         .endm
  78         .macro  itt, cond
  79         .endm
  80         .macro  ite, cond
  81         .endm
  82         .macro  ittt, cond
  83         .endm
  84         .macro  itte, cond
  85         .endm
  86         .macro  itet, cond
  87         .endm
  88         .macro  itee, cond
  89         .endm
  90         .macro  itttt, cond
  91         .endm
  92         .macro  ittte, cond
  93         .endm
  94         .macro  ittet, cond
  95         .endm
  96         .macro  ittee, cond
  97         .endm
  98         .macro  itett, cond
  99         .endm
 100         .macro  itete, cond
 101         .endm
 102         .macro  iteet, cond
 103         .endm
 104         .macro  iteee, cond
 105         .endm
 106 #else   /* !__ASSEMBLY__ */
 107 __asm__(
 108 "       .macro  it, cond\n"
 109 "       .endm\n"
 110 "       .macro  itt, cond\n"
 111 "       .endm\n"
 112 "       .macro  ite, cond\n"
 113 "       .endm\n"
 114 "       .macro  ittt, cond\n"
 115 "       .endm\n"
 116 "       .macro  itte, cond\n"
 117 "       .endm\n"
 118 "       .macro  itet, cond\n"
 119 "       .endm\n"
 120 "       .macro  itee, cond\n"
 121 "       .endm\n"
 122 "       .macro  itttt, cond\n"
 123 "       .endm\n"
 124 "       .macro  ittte, cond\n"
 125 "       .endm\n"
 126 "       .macro  ittet, cond\n"
 127 "       .endm\n"
 128 "       .macro  ittee, cond\n"
 129 "       .endm\n"
 130 "       .macro  itett, cond\n"
 131 "       .endm\n"
 132 "       .macro  itete, cond\n"
 133 "       .endm\n"
 134 "       .macro  iteet, cond\n"
 135 "       .endm\n"
 136 "       .macro  iteee, cond\n"
 137 "       .endm\n");
 138 #endif  /* __ASSEMBLY__ */
 139
 140 #endif  /* CONFIG_ARM_ASM_UNIFIED */
 141
 142 #endif  /* !__ASM_UNIFIED_H */