1 /* 2 * Copyright (C) 2017 Beckhoff Automation GmbH & Co. KG 3 * Patrick Bruenn <p.bruenn@beckhoff.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 10 DECLARE_GLOBAL_DATA_PTR; 11 12 phys_size_t get_effective_memsize(void) 13 { 14 /* 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 23 * DRAM bank. 24 */ 25 return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30); 26 } 27 28 int dram_init(void) 29 { 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); 32 33 return 0; 34 } 35 36 int dram_init_banksize(void) 37 { 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); 40 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); 43 44 return 0; 45 } 46