1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * 32-bit x86 Startup Code when running from SPL. This is the startup code in
4 * U-Boot proper, when SPL is used.
6 * Copyright 2018 Google, Inc
7 * Written by Simon Glass <sjg@chromium.org>
15 .type _start, @function
17 /* Set up memory using the existing stack */
18 movl $(CONFIG_SYS_CAR_ADDR + CONFIG_SYS_CAR_SIZE - 4), %eax
19 #ifdef CONFIG_DCACHE_RAM_MRC_VAR_SIZE
20 subl $CONFIG_DCACHE_RAM_MRC_VAR_SIZE, %eax
23 * We don't subject CONFIG_DCACHE_RAM_MRC_VAR_SIZE since memory is
24 * already set up. This has the happy side-effect of putting gd in a
25 * new place separate from SPL, so the memset() in
26 * board_init_f_init_reserve() does not cause any problems (otherwise
27 * it would zero out the gd and crash)
29 call board_init_f_alloc_reserve
32 call board_init_f_init_reserve
39 /* Should not return here */
42 .globl board_init_f_r_trampoline
43 .type board_init_f_r_trampoline, @function
44 board_init_f_r_trampoline:
46 * SPL has been executed and SDRAM has been initialised, U-Boot code
47 * has been copied into RAM, BSS has been cleared and relocation
48 * adjustments have been made. It is now time to jump into the in-RAM
51 * %eax = Address of top of new stack
54 /* Stack grows down from top of SDRAM */
57 /* Re-enter U-Boot by calling board_init_f_r() */
67 /* These next two fields are filled in by binman */
69 ucode_base: /* Declared in microcode.h */
70 .long 0 /* microcode base */
72 ucode_size: /* Declared in microcode.h */
73 .long 0 /* microcode size */