arch/loongarch/include/asm/asm.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Some useful macros for LoongArch assembler code
   4  *
   5  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
   6  *
   7  * Derived from MIPS:
   8  * Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle
   9  * Copyright (C) 1999 by Silicon Graphics, Inc.
  10  * Copyright (C) 2001 MIPS Technologies, Inc.
  11  * Copyright (C) 2002  Maciej W. Rozycki
  12  */
  13 #ifndef __ASM_ASM_H
  14 #define __ASM_ASM_H
  15
  16 /* LoongArch pref instruction. */
  17 #ifdef CONFIG_CPU_HAS_PREFETCH
  18
  19 #define PREF(hint, addr, offs)                          \
  20                 preld   hint, addr, offs;               \
  21
  22 #define PREFX(hint, addr, index)                        \
  23                 preldx  hint, addr, index;              \
  24
  25 #else /* !CONFIG_CPU_HAS_PREFETCH */
  26
  27 #define PREF(hint, addr, offs)
  28 #define PREFX(hint, addr, index)
  29
  30 #endif /* !CONFIG_CPU_HAS_PREFETCH */
  31
  32 /*
  33  * Stack alignment
  34  */
  35 #define STACK_ALIGN     ~(0xf)
  36
  37 /*
  38  * Macros to handle different pointer/register sizes for 32/64-bit code
  39  */
  40
  41 /*
  42  * Size of a register
  43  */
  44 #ifndef __loongarch64
  45 #define SZREG   4
  46 #else
  47 #define SZREG   8
  48 #endif
  49
  50 /*
  51  * Use the following macros in assemblercode to load/store registers,
  52  * pointers etc.
  53  */
  54 #if (SZREG == 4)
  55 #define REG_L           ld.w
  56 #define REG_S           st.w
  57 #define REG_ADD         add.w
  58 #define REG_SUB         sub.w
  59 #else /* SZREG == 8 */
  60 #define REG_L           ld.d
  61 #define REG_S           st.d
  62 #define REG_ADD         add.d
  63 #define REG_SUB         sub.d
  64 #endif
  65
  66 /*
  67  * How to add/sub/load/store/shift C int variables.
  68  */
  69 #if (__SIZEOF_INT__ == 4)
  70 #define INT_ADD         add.w
  71 #define INT_ADDI        addi.w
  72 #define INT_SUB         sub.w
  73 #define INT_L           ld.w
  74 #define INT_S           st.w
  75 #define INT_SLL         slli.w
  76 #define INT_SLLV        sll.w
  77 #define INT_SRL         srli.w
  78 #define INT_SRLV        srl.w
  79 #define INT_SRA         srai.w
  80 #define INT_SRAV        sra.w
  81 #endif
  82
  83 #if (__SIZEOF_INT__ == 8)
  84 #define INT_ADD         add.d
  85 #define INT_ADDI        addi.d
  86 #define INT_SUB         sub.d
  87 #define INT_L           ld.d
  88 #define INT_S           st.d
  89 #define INT_SLL         slli.d
  90 #define INT_SLLV        sll.d
  91 #define INT_SRL         srli.d
  92 #define INT_SRLV        srl.d
  93 #define INT_SRA         srai.d
  94 #define INT_SRAV        sra.d
  95 #endif
  96
  97 /*
  98  * How to add/sub/load/store/shift C long variables.
  99  */
 100 #if (__SIZEOF_LONG__ == 4)
 101 #define LONG_ADD        add.w
 102 #define LONG_ADDI       addi.w
 103 #define LONG_SUB        sub.w
 104 #define LONG_L          ld.w
 105 #define LONG_S          st.w
 106 #define LONG_SLL        slli.w
 107 #define LONG_SLLV       sll.w
 108 #define LONG_SRL        srli.w
 109 #define LONG_SRLV       srl.w
 110 #define LONG_SRA        srai.w
 111 #define LONG_SRAV       sra.w
 112
 113 #ifdef __ASSEMBLY__
 114 #define LONG            .word
 115 #endif
 116 #define LONGSIZE        4
 117 #define LONGMASK        3
 118 #define LONGLOG         2
 119 #endif
 120
 121 #if (__SIZEOF_LONG__ == 8)
 122 #define LONG_ADD        add.d
 123 #define LONG_ADDI       addi.d
 124 #define LONG_SUB        sub.d
 125 #define LONG_L          ld.d
 126 #define LONG_S          st.d
 127 #define LONG_SLL        slli.d
 128 #define LONG_SLLV       sll.d
 129 #define LONG_SRL        srli.d
 130 #define LONG_SRLV       srl.d
 131 #define LONG_SRA        srai.d
 132 #define LONG_SRAV       sra.d
 133
 134 #ifdef __ASSEMBLY__
 135 #define LONG            .dword
 136 #endif
 137 #define LONGSIZE        8
 138 #define LONGMASK        7
 139 #define LONGLOG         3
 140 #endif
 141
 142 /*
 143  * How to add/sub/load/store/shift pointers.
 144  */
 145 #if (__SIZEOF_POINTER__ == 4)
 146 #define PTR_ADD         add.w
 147 #define PTR_ADDI        addi.w
 148 #define PTR_SUB         sub.w
 149 #define PTR_L           ld.w
 150 #define PTR_S           st.w
 151 #define PTR_LI          li.w
 152 #define PTR_SLL         slli.w
 153 #define PTR_SLLV        sll.w
 154 #define PTR_SRL         srli.w
 155 #define PTR_SRLV        srl.w
 156 #define PTR_SRA         srai.w
 157 #define PTR_SRAV        sra.w
 158
 159 #define PTR_SCALESHIFT  2
 160
 161 #ifdef __ASSEMBLY__
 162 #define PTR             .word
 163 #endif
 164 #define PTRSIZE         4
 165 #define PTRLOG          2
 166 #endif
 167
 168 #if (__SIZEOF_POINTER__ == 8)
 169 #define PTR_ADD         add.d
 170 #define PTR_ADDI        addi.d
 171 #define PTR_SUB         sub.d
 172 #define PTR_L           ld.d
 173 #define PTR_S           st.d
 174 #define PTR_LI          li.d
 175 #define PTR_SLL         slli.d
 176 #define PTR_SLLV        sll.d
 177 #define PTR_SRL         srli.d
 178 #define PTR_SRLV        srl.d
 179 #define PTR_SRA         srai.d
 180 #define PTR_SRAV        sra.d
 181
 182 #define PTR_SCALESHIFT  3
 183
 184 #ifdef __ASSEMBLY__
 185 #define PTR             .dword
 186 #endif
 187 #define PTRSIZE         8
 188 #define PTRLOG          3
 189 #endif
 190
 191 /* Annotate a function as being unsuitable for kprobes. */
 192 #ifdef CONFIG_KPROBES
 193 #define _ASM_NOKPROBE(name)                             \
 194         .pushsection "_kprobe_blacklist", "aw";         \
 195         .quad   name;                                   \
 196         .popsection
 197 #else
 198 #define _ASM_NOKPROBE(name)
 199 #endif
 200
 201 #endif /* __ASM_ASM_H */