| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2022 StarFive Technology Co., Ltd. |
| * Author: Yanhong Wang <yanhong.wang@starfivetech.com> |
| */ |
| |
| #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(); |
| } |
| |
| phys_addr_t board_get_usable_ram_top(phys_size_t total_size) |
| { |
| /* |
| * 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 (IS_ENABLED(CONFIG_64BIT) && gd->ram_top > SZ_4G) |
| return SZ_4G; |
| |
| return gd->ram_top; |
| } |
