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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
- */
- #include <common.h>
- #include <fdtdec.h>
- #include <init.h>
- #include <linux/sizes.h>
- DECLARE_GLOBAL_DATA_PTR;
- int dram_init(void)
- {
- return fdtdec_setup_mem_size_base();
- }
- int dram_init_banksize(void)
- {
- return fdtdec_setup_memory_banksize();
- }
- ulong board_get_usable_ram_top(ulong total_size)
- {
- #ifdef CONFIG_64BIT
- /*
- * Ensure that we run from first 4GB so that all
- * addresses used by U-Boot are 32bit addresses.
- *
- * This in-turn ensures that 32bit DMA capable
- * devices work fine because DMA mapping APIs will
- * provide 32bit DMA addresses only.
- */
- if (gd->ram_top > SZ_4G)
- return SZ_4G;
- #endif
- return gd->ram_top;
- }
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