1 /* 2 * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <libfdt.h> 9 #include <linux/err.h> 10 11 DECLARE_GLOBAL_DATA_PTR; 12 13 static const void *get_memory_reg_prop(const void *fdt, int *lenp) 14 { 15 int offset; 16 17 offset = fdt_path_offset(fdt, "/memory"); 18 if (offset < 0) 19 return NULL; 20 21 return fdt_getprop(fdt, offset, "reg", lenp); 22 } 23 24 int dram_init(void) 25 { 26 const fdt32_t *val; 27 int len; 28 29 val = get_memory_reg_prop(gd->fdt_blob, &len); 30 if (len < sizeof(*val)) 31 return -EINVAL; 32 33 gd->ram_size = fdt32_to_cpu(*(val + 1)); 34 35 debug("DRAM size = %08lx\n", (unsigned long)gd->ram_size); 36 37 return 0; 38 } 39 40 void dram_init_banksize(void) 41 { 42 const fdt32_t *val; 43 int len, i; 44 45 val = get_memory_reg_prop(gd->fdt_blob, &len); 46 if (len < 0) 47 return; 48 49 len /= sizeof(*val); 50 len /= 2; 51 52 for (i = 0; i < len; i++) { 53 gd->bd->bi_dram[i].start = fdt32_to_cpu(*val++); 54 gd->bd->bi_dram[i].size = fdt32_to_cpu(*val++); 55 56 debug("DRAM bank %d: start = %08lx, size = %08lx\n", 57 i, (unsigned long)gd->bd->bi_dram[i].start, 58 (unsigned long)gd->bd->bi_dram[i].size); 59 } 60 } 61