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https://github.com/AsahiLinux/u-boot
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board_get_usable_ram_top() returns a physical address that is stored in gd->ram_top. The return type of the function should be phys_addr_t like the current type of gd->ram_top. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
38 lines
759 B
C
38 lines
759 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <init.h>
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#include <asm/global_data.h>
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#include <linux/sizes.h>
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DECLARE_GLOBAL_DATA_PTR;
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int dram_init(void)
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{
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return fdtdec_setup_mem_size_base();
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}
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int dram_init_banksize(void)
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{
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return fdtdec_setup_memory_banksize();
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}
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phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
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{
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/*
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* Ensure that we run from first 4GB so that all
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* addresses used by U-Boot are 32bit addresses.
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*
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* This in-turn ensures that 32bit DMA capable
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* devices work fine because DMA mapping APIs will
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* provide 32bit DMA addresses only.
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*/
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if (gd->ram_top >= SZ_4G)
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return SZ_4G - 1;
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return gd->ram_top;
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}
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