lib/el3_runtime/aarch32/cpu_data.S

   1 /*
   2  * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <asm_macros.S>
   8 #include <lib/el3_runtime/cpu_data.h>
   9
  10         .globl  _cpu_data
  11         .globl  _cpu_data_by_index
  12
  13 /* -----------------------------------------------------------------
  14  * cpu_data_t *_cpu_data(void)
  15  *
  16  * Return the cpu_data structure for the current CPU.
  17  * -----------------------------------------------------------------
  18  */
  19 func _cpu_data
  20         /* r12 is pushed to meet the 8 byte stack alignment requirement */
  21         push    {r12, lr}
  22         bl      plat_my_core_pos
  23         pop     {r12, lr}
  24         b       _cpu_data_by_index
  25 endfunc _cpu_data
  26
  27 /* -----------------------------------------------------------------
  28  * cpu_data_t *_cpu_data_by_index(uint32_t cpu_index)
  29  *
  30  * Return the cpu_data structure for the CPU with given linear index
  31  *
  32  * This can be called without a valid stack.
  33  * clobbers: r0, r1
  34  * -----------------------------------------------------------------
  35  */
  36 func _cpu_data_by_index
  37         mov_imm r1, CPU_DATA_SIZE
  38         mul     r0, r0, r1
  39         ldr     r1, =percpu_data
  40         add     r0, r0, r1
  41         bx      lr
  42 endfunc _cpu_data_by_index