| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * A lowlevel_init function that sets up the stack to call a C function to |
| * perform further init. |
| * |
| * (C) Copyright 2010 |
| * Texas Instruments, <www.ti.com> |
| * |
| * Author : |
| * Aneesh V <aneesh@ti.com> |
| */ |
| |
| #include <asm-offsets.h> |
| #include <config.h> |
| #include <linux/linkage.h> |
| #include <system-constants.h> |
| |
| .pushsection .text.s_init, "ax" |
| WEAK(s_init) |
| bx lr |
| ENDPROC(s_init) |
| .popsection |
| |
| .pushsection .text.lowlevel_init, "ax" |
| WEAK(lowlevel_init) |
| /* |
| * Setup a temporary stack. Global data is not available yet. |
| */ |
| #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK) |
| ldr sp, =CONFIG_SPL_STACK |
| #else |
| ldr sp, =SYS_INIT_SP_ADDR |
| #endif |
| bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ |
| #ifdef CONFIG_SPL_DM |
| mov r9, #0 |
| #else |
| /* |
| * Set up global data for boards that still need it. This will be |
| * removed soon. |
| */ |
| #ifdef CONFIG_SPL_BUILD |
| ldr r9, =gdata |
| #else |
| sub sp, sp, #GD_SIZE |
| bic sp, sp, #7 |
| mov r9, sp |
| #endif |
| #endif |
| /* |
| * Save the old lr(passed in ip) and the current lr to stack |
| */ |
| push {ip, lr} |
| |
| /* |
| * Call the very early init function. This should do only the |
| * absolute bare minimum to get started. It should not: |
| * |
| * - set up DRAM |
| * - use global_data |
| * - clear BSS |
| * - try to start a console |
| * |
| * For boards with SPL this should be empty since SPL can do all of |
| * this init in the SPL board_init_f() function which is called |
| * immediately after this. |
| */ |
| bl s_init |
| pop {ip, pc} |
| ENDPROC(lowlevel_init) |
| .popsection |