65dd1507e3
The code to call the memory reference code is common to several Intel CPUs. Add common code for performing this init. Intel calls this 'Pre-EFI-Init' (PEI), where EFI stands for Extensible Firmware Interface. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/*
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* Copyright (c) 2016 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef __ASM_MRC_COMMON_H
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#define __ASM_MRC_COMMON_H
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#include <linux/linkage.h>
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/**
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* mrc_common_init() - Set up SDRAM
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*
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* This calls the memory reference code (MRC) to set up SDRAM
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*
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* @dev: Northbridge device
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* @pei_data: Platform-specific data required by the MRC
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* @use_asm_linkage: true if the call to MRC requires asmlinkage, false if it
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* uses normal U-Boot calling
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* @return 0 if OK, -ve on error
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*/
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int mrc_common_init(struct udevice *dev, void *pei_data, bool use_asm_linkage);
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asmlinkage void sdram_console_tx_byte(unsigned char byte);
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int mrc_locate_spd(struct udevice *dev, int size, const void **spd_datap);
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void report_memory_config(void);
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/**
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* mrc_add_memory_area() - Add a new usable memory area to our list
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*
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* Note: @start and @end must not span the first 4GB boundary
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*
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* @info: Place to store memory info
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* @start: Start of this memory area
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* @end: End of this memory area + 1
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*/
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int mrc_add_memory_area(struct memory_info *info, uint64_t start,
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uint64_t end);
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/*
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* This function looks for the highest region of memory lower than 4GB which
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* has enough space for U-Boot where U-Boot is aligned on a page boundary.
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* It overrides the default implementation found elsewhere which simply
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* picks the end of ram, wherever that may be. The location of the stack,
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* the relocation address, and how far U-Boot is moved by relocation are
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* set in the global data structure.
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*/
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ulong mrc_common_board_get_usable_ram_top(ulong total_size);
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void mrc_common_dram_init_banksize(void);
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#endif
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