ArmPkg/Include/AsmMacroIoLib.h

   1 /** @file
   2   Macros to work around lack of Apple support for LDR register, =expr
   3
   4   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   5   Copyright (c) 2011-2012, ARM Ltd. All rights reserved.<BR>
   6   Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
   7
   8   This program and the accompanying materials
   9   are licensed and made available under the terms and conditions of the BSD License
  10   which accompanies this distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  14   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15
  16 **/
  17
  18
  19 #ifndef __MACRO_IO_LIB_H__
  20 #define __MACRO_IO_LIB_H__
  21
  22 #define _ASM_FUNC(Name, Section)    \
  23   .global   Name                  ; \
  24   .section  #Section, "ax"        ; \
  25   .type     Name, %function       ; \
  26   .p2align  2                     ; \
  27   Name:
  28
  29 #define ASM_FUNC(Name)            _ASM_FUNC(ASM_PFX(Name), .text. ## Name)
  30
  31 #define MOV32(Reg, Val)                       \
  32   movw      Reg, #(Val) & 0xffff            ; \
  33   movt      Reg, #(Val) >> 16
  34
  35 #define ADRL(Reg, Sym)                        \
  36   movw      Reg, #:lower16:(Sym) - (. + 16) ; \
  37   movt      Reg, #:upper16:(Sym) - (. + 12) ; \
  38   add       Reg, Reg, pc
  39
  40 #define LDRL(Reg, Sym)                        \
  41   movw      Reg, #:lower16:(Sym) - (. + 16) ; \
  42   movt      Reg, #:upper16:(Sym) - (. + 12) ; \
  43   ldr       Reg, [pc, Reg]
  44
  45 #endif