1 /* 2 * Copyright (c) 2016 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #ifndef __ASM_MRC_COMMON_H 8 #define __ASM_MRC_COMMON_H 9 10 #include <linux/linkage.h> 11 12 /** 13 * mrc_common_init() - Set up SDRAM 14 * 15 * This calls the memory reference code (MRC) to set up SDRAM 16 * 17 * @dev: Northbridge device 18 * @pei_data: Platform-specific data required by the MRC 19 * @use_asm_linkage: true if the call to MRC requires asmlinkage, false if it 20 * uses normal U-Boot calling 21 * @return 0 if OK, -ve on error 22 */ 23 int mrc_common_init(struct udevice *dev, void *pei_data, bool use_asm_linkage); 24 25 asmlinkage void sdram_console_tx_byte(unsigned char byte); 26 27 int mrc_locate_spd(struct udevice *dev, int size, const void **spd_datap); 28 29 void report_memory_config(void); 30 31 /** 32 * mrc_add_memory_area() - Add a new usable memory area to our list 33 * 34 * Note: @start and @end must not span the first 4GB boundary 35 * 36 * @info: Place to store memory info 37 * @start: Start of this memory area 38 * @end: End of this memory area + 1 39 */ 40 int mrc_add_memory_area(struct memory_info *info, uint64_t start, 41 uint64_t end); 42 43 /* 44 * This function looks for the highest region of memory lower than 4GB which 45 * has enough space for U-Boot where U-Boot is aligned on a page boundary. 46 * It overrides the default implementation found elsewhere which simply 47 * picks the end of ram, wherever that may be. The location of the stack, 48 * the relocation address, and how far U-Boot is moved by relocation are 49 * set in the global data structure. 50 */ 51 ulong mrc_common_board_get_usable_ram_top(ulong total_size); 52 53 void mrc_common_dram_init_banksize(void); 54 55 #endif 56