| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * 32-bit x86 Startup Code when running from TPL. This is the startup code in |
| * SPL, when TPL is used. |
| * |
| * Copyright 2018 Google, Inc |
| * Written by Simon Glass <sjg@chromium.org> |
| */ |
| |
| #include <config.h> |
| |
| .section .text.start |
| .code32 |
| .globl _start |
| .type _start, @function |
| _start: |
| /* Set up memory using the existing stack */ |
| mov %esp, %eax |
| call board_init_f_alloc_reserve |
| mov %eax, %esp |
| |
| call board_init_f_init_reserve |
| |
| xorl %eax, %eax |
| call board_init_f |
| call board_init_f_r |
| |
| /* Should not return here */ |
| jmp . |
| |
| .globl board_init_f_r_trampoline |
| .type board_init_f_r_trampoline, @function |
| board_init_f_r_trampoline: |
| /* |
| * TPL has been executed: SDRAM has been initialised, BSS has been |
| * cleared. |
| * |
| * %eax = Address of top of new stack |
| */ |
| |
| /* Stack grows down from top of SDRAM */ |
| movl %eax, %esp |
| |
| /* Re-enter SPL by calling board_init_f_r() */ |
| call board_init_f_r |
| |
| die: |
| hlt |
| jmp die |
| hlt |