src/arch/arm/asmlib.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  This file contains arm architecture specific defines
   4  *  for the different processors.
   5  *
   6  *  Adapted from Linux arch/arm/include/assembler.h
   7  *
   8  *  Do not include any C declarations in this file - it is included by
   9  *  assembler source.
  10  */
  11
  12 /*
  13  * WARNING: This file is *only* meant for memcpy.S and friends which were copied
  14  * from Linux and require some weird macros. It does unspeakable things like
  15  * redefining "push", so do *not* try to turn it into a general assembly macro
  16  * file, and keep it out of global include directories.
  17  */
  18
  19 #ifndef __ARM_ASMLIB_H__
  20 #define __ARM_ASMLIB_H__
  21
  22 /*
  23  * Endian independent macros for shifting bytes within registers.
  24  */
  25 #ifndef __ARMEB__
  26 #define pull            lsr
  27 #define push            lsl
  28 #define get_byte_0      lsl #0
  29 #define get_byte_1      lsr #8
  30 #define get_byte_2      lsr #16
  31 #define get_byte_3      lsr #24
  32 #define put_byte_0      lsl #0
  33 #define put_byte_1      lsl #8
  34 #define put_byte_2      lsl #16
  35 #define put_byte_3      lsl #24
  36 #else
  37 #define pull            lsl
  38 #define push            lsr
  39 #define get_byte_0      lsr #24
  40 #define get_byte_1      lsr #16
  41 #define get_byte_2      lsr #8
  42 #define get_byte_3      lsl #0
  43 #define put_byte_0      lsl #24
  44 #define put_byte_1      lsl #16
  45 #define put_byte_2      lsl #8
  46 #define put_byte_3      lsl #0
  47 #endif
  48
  49 /*
  50  * Data preload for architectures that support it
  51  */
  52 #if __COREBOOT_ARM_ARCH__ >= 5
  53 #define PLD(code...)    code
  54 #else
  55 #define PLD(code...)
  56 #endif
  57
  58 /*
  59  * This can be used to enable code to cacheline align the destination
  60  * pointer when bulk writing to memory. Linux doesn't enable this except
  61  * for the "Feroceon" processor, so we better just leave it out.
  62  */
  63 #define CALGN(code...)
  64
  65 #endif /* __ARM_ASMLIB_H__ */