1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2017 Beckhoff Automation GmbH & Co. KG 4 * Patrick Bruenn <p.bruenn@beckhoff.com> 5 */ 6 7 #include <common.h> 8 9 DECLARE_GLOBAL_DATA_PTR; 10 11 phys_size_t get_effective_memsize(void) 12 { 13 /* 14 * WARNING: We must override get_effective_memsize() function here 15 * to report only the size of the first DRAM bank. This is to make 16 * U-Boot relocator place U-Boot into valid memory, that is, at the 17 * end of the first DRAM bank. If we did not override this function 18 * like so, U-Boot would be placed at the address of the first DRAM 19 * bank + total DRAM size - sizeof(uboot), which in the setup where 20 * each DRAM bank contains 512MiB of DRAM would result in placing 21 * U-Boot into invalid memory area close to the end of the first 22 * DRAM bank. 23 */ 24 return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30); 25 } 26 27 int dram_init(void) 28 { 29 gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30); 30 gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30); 31 32 return 0; 33 } 34 35 int dram_init_banksize(void) 36 { 37 gd->bd->bi_dram[0].start = PHYS_SDRAM_1; 38 gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30); 39 40 gd->bd->bi_dram[1].start = PHYS_SDRAM_2; 41 gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30); 42 43 return 0; 44 } 45