arch/riscv/include/asm/asm.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2015 Regents of the University of California
   4  */
   5
   6 #ifndef _ASM_RISCV_ASM_H
   7 #define _ASM_RISCV_ASM_H
   8
   9 #ifdef __ASSEMBLY__
  10 #define __ASM_STR(x)    x
  11 #else
  12 #define __ASM_STR(x)    #x
  13 #endif
  14
  15 #if __riscv_xlen == 64
  16 #define __REG_SEL(a, b) __ASM_STR(a)
  17 #elif __riscv_xlen == 32
  18 #define __REG_SEL(a, b) __ASM_STR(b)
  19 #else
  20 #error "Unexpected __riscv_xlen"
  21 #endif
  22
  23 #define REG_L           __REG_SEL(ld, lw)
  24 #define REG_S           __REG_SEL(sd, sw)
  25 #define REG_SC          __REG_SEL(sc.d, sc.w)
  26 #define REG_ASM         __REG_SEL(.dword, .word)
  27 #define SZREG           __REG_SEL(8, 4)
  28 #define LGREG           __REG_SEL(3, 2)
  29
  30 #if __SIZEOF_POINTER__ == 8
  31 #ifdef __ASSEMBLY__
  32 #define RISCV_PTR               .dword
  33 #define RISCV_SZPTR             8
  34 #define RISCV_LGPTR             3
  35 #else
  36 #define RISCV_PTR               ".dword"
  37 #define RISCV_SZPTR             "8"
  38 #define RISCV_LGPTR             "3"
  39 #endif
  40 #elif __SIZEOF_POINTER__ == 4
  41 #ifdef __ASSEMBLY__
  42 #define RISCV_PTR               .word
  43 #define RISCV_SZPTR             4
  44 #define RISCV_LGPTR             2
  45 #else
  46 #define RISCV_PTR               ".word"
  47 #define RISCV_SZPTR             "4"
  48 #define RISCV_LGPTR             "2"
  49 #endif
  50 #else
  51 #error "Unexpected __SIZEOF_POINTER__"
  52 #endif
  53
  54 #if (__SIZEOF_INT__ == 4)
  55 #define RISCV_INT               __ASM_STR(.word)
  56 #define RISCV_SZINT             __ASM_STR(4)
  57 #define RISCV_LGINT             __ASM_STR(2)
  58 #else
  59 #error "Unexpected __SIZEOF_INT__"
  60 #endif
  61
  62 #if (__SIZEOF_SHORT__ == 2)
  63 #define RISCV_SHORT             __ASM_STR(.half)
  64 #define RISCV_SZSHORT           __ASM_STR(2)
  65 #define RISCV_LGSHORT           __ASM_STR(1)
  66 #else
  67 #error "Unexpected __SIZEOF_SHORT__"
  68 #endif
  69
  70 #endif /* _ASM_RISCV_ASM_H */