1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2016 Google, Inc 4 */ 5 6 #ifndef __ASM_MRC_COMMON_H 7 #define __ASM_MRC_COMMON_H 8 9 #include <linux/linkage.h> 10 11 /** 12 * mrc_common_init() - Set up SDRAM 13 * 14 * This calls the memory reference code (MRC) to set up SDRAM 15 * 16 * @dev: Northbridge device 17 * @pei_data: Platform-specific data required by the MRC 18 * @use_asm_linkage: true if the call to MRC requires asmlinkage, false if it 19 * uses normal U-Boot calling 20 * @return 0 if OK, -ve on error 21 */ 22 int mrc_common_init(struct udevice *dev, void *pei_data, bool use_asm_linkage); 23 24 asmlinkage void sdram_console_tx_byte(unsigned char byte); 25 26 int mrc_locate_spd(struct udevice *dev, int size, const void **spd_datap); 27 28 void report_memory_config(void); 29 30 /** 31 * mrc_add_memory_area() - Add a new usable memory area to our list 32 * 33 * Note: @start and @end must not span the first 4GB boundary 34 * 35 * @info: Place to store memory info 36 * @start: Start of this memory area 37 * @end: End of this memory area + 1 38 */ 39 int mrc_add_memory_area(struct memory_info *info, uint64_t start, 40 uint64_t end); 41 42 /* 43 * This function looks for the highest region of memory lower than 4GB which 44 * has enough space for U-Boot where U-Boot is aligned on a page boundary. 45 * It overrides the default implementation found elsewhere which simply 46 * picks the end of ram, wherever that may be. The location of the stack, 47 * the relocation address, and how far U-Boot is moved by relocation are 48 * set in the global data structure. 49 */ 50 ulong mrc_common_board_get_usable_ram_top(ulong total_size); 51 52 void mrc_common_dram_init_banksize(void); 53 54 #endif 55