arch/arm/mach-mt8127/mt_hotplug.S

   1        .text
   2        .global __switch_to_smp
   3        .global __switch_to_amp
   4 .equ ACTLR_SMP_BIT ,0x00000040
   5
   6 __switch_to_smp:
   7     MRC p15,0,r0,c1,c0,1
   8     ORR r0,r0,#ACTLR_SMP_BIT
   9     MCR p15,0,r0,c1,c0,1
  10     BX lr
  11
  12 __switch_to_amp:
  13     MRC p15,0,r0,c1,c0,1
  14     BIC r0,r0,#ACTLR_SMP_BIT
  15     MCR p15,0,r0,c1,c0,1
  16     BX lr