| /* 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 |