arch/arm/cpu/armv7/lowlevel_init.S

   1 /*
   2  * A lowlevel_init function that sets up the stack to call a C function to
   3  * perform further init.
   4  *
   5  * (C) Copyright 2010
   6  * Texas Instruments, <www.ti.com>
   7  *
   8  * Author :
   9  *      Aneesh V        <aneesh@ti.com>
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <asm-offsets.h>
  15 #include <config.h>
  16 #include <linux/linkage.h>
  17
  18 ENTRY(lowlevel_init)
  19         /*
  20          * Setup a temporary stack
  21          */
  22         ldr     sp, =CONFIG_SYS_INIT_SP_ADDR
  23         bic     sp, sp, #7 /* 8-byte alignment for ABI compliance */
  24 #ifdef CONFIG_SPL_BUILD
  25         ldr     r8, =gdata
  26 #else
  27         sub     sp, #GD_SIZE
  28         bic     sp, sp, #7
  29         mov     r8, sp
  30 #endif
  31         /*
  32          * Save the old lr(passed in ip) and the current lr to stack
  33          */
  34         push    {ip, lr}
  35
  36         /*
  37          * go setup pll, mux, memory
  38          */
  39         bl      s_init
  40         pop     {ip, pc}
  41 ENDPROC(lowlevel_init)