1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2016 Google, Inc
6 #ifndef __ASM_MRC_COMMON_H
7 #define __ASM_MRC_COMMON_H
9 #include <linux/linkage.h>
12 * mrc_common_init() - Set up SDRAM
14 * This calls the memory reference code (MRC) to set up SDRAM
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
22 int mrc_common_init(struct udevice *dev, void *pei_data, bool use_asm_linkage);
24 asmlinkage void sdram_console_tx_byte(unsigned char byte);
26 int mrc_locate_spd(struct udevice *dev, int size, const void **spd_datap);
28 void report_memory_config(void);
31 * mrc_add_memory_area() - Add a new usable memory area to our list
33 * Note: @start and @end must not span the first 4GB boundary
35 * @info: Place to store memory info
36 * @start: Start of this memory area
37 * @end: End of this memory area + 1
39 int mrc_add_memory_area(struct memory_info *info, uint64_t start,
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.
50 ulong mrc_common_board_get_usable_ram_top(ulong total_size);
52 void mrc_common_dram_init_banksize(void);