1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright (c) 2016 Google, Inc 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0 5*4882a593Smuzhiyun */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef __ASM_MRC_COMMON_H 8*4882a593Smuzhiyun #define __ASM_MRC_COMMON_H 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun #include <linux/linkage.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /** 13*4882a593Smuzhiyun * mrc_common_init() - Set up SDRAM 14*4882a593Smuzhiyun * 15*4882a593Smuzhiyun * This calls the memory reference code (MRC) to set up SDRAM 16*4882a593Smuzhiyun * 17*4882a593Smuzhiyun * @dev: Northbridge device 18*4882a593Smuzhiyun * @pei_data: Platform-specific data required by the MRC 19*4882a593Smuzhiyun * @use_asm_linkage: true if the call to MRC requires asmlinkage, false if it 20*4882a593Smuzhiyun * uses normal U-Boot calling 21*4882a593Smuzhiyun * @return 0 if OK, -ve on error 22*4882a593Smuzhiyun */ 23*4882a593Smuzhiyun int mrc_common_init(struct udevice *dev, void *pei_data, bool use_asm_linkage); 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun asmlinkage void sdram_console_tx_byte(unsigned char byte); 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun int mrc_locate_spd(struct udevice *dev, int size, const void **spd_datap); 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun void report_memory_config(void); 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun /** 32*4882a593Smuzhiyun * mrc_add_memory_area() - Add a new usable memory area to our list 33*4882a593Smuzhiyun * 34*4882a593Smuzhiyun * Note: @start and @end must not span the first 4GB boundary 35*4882a593Smuzhiyun * 36*4882a593Smuzhiyun * @info: Place to store memory info 37*4882a593Smuzhiyun * @start: Start of this memory area 38*4882a593Smuzhiyun * @end: End of this memory area + 1 39*4882a593Smuzhiyun */ 40*4882a593Smuzhiyun int mrc_add_memory_area(struct memory_info *info, uint64_t start, 41*4882a593Smuzhiyun uint64_t end); 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun /* 44*4882a593Smuzhiyun * This function looks for the highest region of memory lower than 4GB which 45*4882a593Smuzhiyun * has enough space for U-Boot where U-Boot is aligned on a page boundary. 46*4882a593Smuzhiyun * It overrides the default implementation found elsewhere which simply 47*4882a593Smuzhiyun * picks the end of ram, wherever that may be. The location of the stack, 48*4882a593Smuzhiyun * the relocation address, and how far U-Boot is moved by relocation are 49*4882a593Smuzhiyun * set in the global data structure. 50*4882a593Smuzhiyun */ 51*4882a593Smuzhiyun ulong mrc_common_board_get_usable_ram_top(ulong total_size); 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun void mrc_common_dram_init_banksize(void); 54*4882a593Smuzhiyun 55*4882a593Smuzhiyun #endif 56