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 #include <init.h>
9 #include <asm/global_data.h>
10 
11 DECLARE_GLOBAL_DATA_PTR;
12 
get_effective_memsize(void)13 phys_size_t get_effective_memsize(void)
14 {
15 	/*
16 	 * WARNING: We must override get_effective_memsize() function here
17 	 * to report only the size of the first DRAM bank. This is to make
18 	 * U-Boot relocator place U-Boot into valid memory, that is, at the
19 	 * end of the first DRAM bank. If we did not override this function
20 	 * like so, U-Boot would be placed at the address of the first DRAM
21 	 * bank + total DRAM size - sizeof(uboot), which in the setup where
22 	 * each DRAM bank contains 512MiB of DRAM would result in placing
23 	 * U-Boot into invalid memory area close to the end of the first
24 	 * DRAM bank.
25 	 */
26 	return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
27 }
28 
dram_init(void)29 int dram_init(void)
30 {
31 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
32 	gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
33 
34 	return 0;
35 }
36 
dram_init_banksize(void)37 int dram_init_banksize(void)
38 {
39 	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
40 	gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
41 
42 	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
43 	gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
44 
45 	return 0;
46 }
47