1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2020-2021 SiFive, Inc 4 * Pragnesh Patel <pragnesh.patel@sifive.com> 5 */ 6 7 #include <dm.h> 8 #include <log.h> 9 #include <asm/csr.h> 10 11 #define CSR_U74_FEATURE_DISABLE 0x7c1 12 spl_dram_init(void)13int spl_dram_init(void) 14 { 15 int ret; 16 struct udevice *dev; 17 18 /* DDR init */ 19 ret = uclass_get_device(UCLASS_RAM, 0, &dev); 20 if (ret) { 21 debug("DRAM init failed: %d\n", ret); 22 return ret; 23 } 24 25 return 0; 26 } 27 harts_early_init(void)28void harts_early_init(void) 29 { 30 /* 31 * Feature Disable CSR 32 * 33 * Clear feature disable CSR to '0' to turn on all features for 34 * each core. This operation must be in M-mode. 35 */ 36 if (CONFIG_IS_ENABLED(RISCV_MMODE)) 37 csr_write(CSR_U74_FEATURE_DISABLE, 0); 38 } 39