| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * 32-bit x86 Startup Code when running from SPL |
| * |
| * 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 */ |
| movl $(CONFIG_SYS_CAR_ADDR + CONFIG_SYS_CAR_SIZE - 4), %eax |
| #ifdef CONFIG_DCACHE_RAM_MRC_VAR_SIZE |
| subl $CONFIG_DCACHE_RAM_MRC_VAR_SIZE, %eax |
| #endif |
| /* |
| * We don't subject CONFIG_DCACHE_RAM_MRC_VAR_SIZE since memory is |
| * already set up. This has the happy side-effect of putting gd in a |
| * new place separate from SPL, so the memset() in |
| * board_init_f_init_reserve() does not cause any problems (otherwise |
| * it would zero out the gd and crash) |
| */ |
| 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: |
| /* |
| * SPL has been executed and SDRAM has been initialised, U-Boot code |
| * has been copied into RAM, BSS has been cleared and relocation |
| * adjustments have been made. It is now time to jump into the in-RAM |
| * copy of U-Boot |
| * |
| * %eax = Address of top of new stack |
| */ |
| |
| /* Stack grows down from top of SDRAM */ |
| movl %eax, %esp |
| |
| /* Re-enter U-Boot by calling board_init_f_r() */ |
| call board_init_f_r |
| |
| die: |
| hlt |
| jmp die |
| hlt |
| |
| .align 4 |
| _dt_ucode_base_size: |
| /* These next two fields are filled in by binman */ |
| .globl ucode_base |
| ucode_base: /* Declared in microcode.h */ |
| .long 0 /* microcode base */ |
| .globl ucode_size |
| ucode_size: /* Declared in microcode.h */ |
| .long 0 /* microcode size */ |
