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