1 /* 2 * Copyright (C) 2016 Imagination Technologies 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #include <common.h> 8 9 #include <asm/io.h> 10 11 #include "boston-regs.h" 12 13 DECLARE_GLOBAL_DATA_PTR; 14 15 int dram_init(void) 16 { 17 u32 ddrconf0 = __raw_readl((uint32_t *)BOSTON_PLAT_DDRCONF0); 18 19 gd->ram_size = (phys_size_t)(ddrconf0 & BOSTON_PLAT_DDRCONF0_SIZE) << 20 30; 21 22 return 0; 23 } 24 25 ulong board_get_usable_ram_top(ulong total_size) 26 { 27 DECLARE_GLOBAL_DATA_PTR; 28 29 if (gd->ram_top < CONFIG_SYS_SDRAM_BASE) { 30 /* 2GB wrapped around to 0 */ 31 return CKSEG0ADDR(256 << 20); 32 } 33 34 return min_t(unsigned long, gd->ram_top, CKSEG0ADDR(256 << 20)); 35 } 36