1 /* 2 * Code shared between SPL and U-Boot proper 3 * 4 * Copyright (c) 2015 Google, Inc 5 * Written by Simon Glass <sjg@chromium.org> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 12 DECLARE_GLOBAL_DATA_PTR; 13 14 /* 15 * It isn't trivial to figure out whether memcpy() exists. The arch-specific 16 * memcpy() is not normally available in SPL due to code size. 17 */ 18 #if !defined(CONFIG_SPL_BUILD) || \ 19 (defined(CONFIG_SPL_LIBGENERIC_SUPPORT) && \ 20 !defined(CONFIG_USE_ARCH_MEMSET)) 21 #define _USE_MEMCPY 22 #endif 23 24 /* Unfortunately x86 can't compile this code as gd cannot be assigned */ 25 #ifndef CONFIG_X86 26 __weak void arch_setup_gd(struct global_data *gd_ptr) 27 { 28 gd = gd_ptr; 29 } 30 #endif /* !CONFIG_X86 */ 31 32 ulong board_init_f_mem(ulong top) 33 { 34 struct global_data *gd_ptr; 35 #ifndef _USE_MEMCPY 36 int *ptr; 37 #endif 38 39 /* Leave space for the stack we are running with now */ 40 top -= 0x40; 41 42 top -= sizeof(struct global_data); 43 top = ALIGN(top, 16); 44 gd_ptr = (struct global_data *)top; 45 #ifdef _USE_MEMCPY 46 memset(gd_ptr, '\0', sizeof(*gd)); 47 #else 48 for (ptr = (int *)gd_ptr; ptr < (int *)(gd_ptr + 1); ) 49 *ptr++ = 0; 50 #endif 51 arch_setup_gd(gd_ptr); 52 53 #if defined(CONFIG_SYS_MALLOC_F) 54 top -= CONFIG_SYS_MALLOC_F_LEN; 55 gd->malloc_base = top; 56 #endif 57 58 return top; 59 } 60