1 /* 2 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch.h> 8 #include <arch_helpers.h> 9 #include "../bl1_private.h" 10 11 /******************************************************************************* 12 * Function that does the first bit of architectural setup that affects 13 * execution in the non-secure address space. 14 ******************************************************************************/ 15 void bl1_arch_setup(void) 16 { 17 /* Set the next EL to be AArch64 */ 18 write_scr_el3(read_scr_el3() | SCR_RW_BIT); 19 } 20 21 /******************************************************************************* 22 * Set the Secure EL1 required architectural state 23 ******************************************************************************/ 24 void bl1_arch_next_el_setup(void) 25 { 26 unsigned long next_sctlr; 27 28 /* Use the same endianness than the current BL */ 29 next_sctlr = (read_sctlr_el3() & SCTLR_EE_BIT); 30 31 /* Set SCTLR Secure EL1 */ 32 next_sctlr |= SCTLR_EL1_RES1; 33 34 write_sctlr_el1(next_sctlr); 35 } 36
