1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017 Beckhoff Automation GmbH & Co. KG
8 #include <asm/global_data.h>
10 DECLARE_GLOBAL_DATA_PTR;
12 phys_size_t get_effective_memsize(void)
15 * WARNING: We must override get_effective_memsize() function here
16 * to report only the size of the first DRAM bank. This is to make
17 * U-Boot relocator place U-Boot into valid memory, that is, at the
18 * end of the first DRAM bank. If we did not override this function
19 * like so, U-Boot would be placed at the address of the first DRAM
20 * bank + total DRAM size - sizeof(uboot), which in the setup where
21 * each DRAM bank contains 512MiB of DRAM would result in placing
22 * U-Boot into invalid memory area close to the end of the first
25 return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
30 gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
31 gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
36 int dram_init_banksize(void)
38 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
39 gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
41 gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
42 gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);