kernel/source/arch/proc/arm/arm_v7a/gcc/kena_int.S

   1 /**
   2  *  Hyper Operating System V4 Advance
   3  *
   4  * Copyright (C) 1998-2014 by Project HOS
   5  * http://sourceforge.jp/projects/hos/
   6  */
   7
   8
   9 #include "arm_v7a.inc"
  10
  11                                 .code   32
  12                                 .text
  13                                 .align  2
  14
  15 /************************************************
  16   割り込み許可
  17   void _kernel_ena_int(void)
  18  ************************************************/
  19                                 .global _kernel_ena_int
  20                                 .global _kernel_ictxcb
  21 _kernel_ena_int:
  22                                 ldr             r1, =_kernel_ictxcb
  23                                 mrs     r0, cpsr                                        /* cpsr取得 */
  24                                 ldrb    r1, [r1, #ICTXCB_IMSK]          /* 割込みマスク値取得 */
  25                                 bic             r0, r0, #(F_Bit | I_Bit)        /* FビットとIビットをクリア */
  26                                 orr             r0, r0, r1                                      /* 割込みマスク設定 */
  27                                 msr     cpsr_c, r0                                      /* cpsr設定 */
  28                                 bx              lr                                                      /* リターン */
  29
  30
  31                                 .end
  32
  33
  34 /* end of file */