diff options
Diffstat (limited to 'bl1/aarch64/bl1_arch_setup.c')
-rw-r--r-- | bl1/aarch64/bl1_arch_setup.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/bl1/aarch64/bl1_arch_setup.c b/bl1/aarch64/bl1_arch_setup.c new file mode 100644 index 0000000..0a1cb30 --- /dev/null +++ b/bl1/aarch64/bl1_arch_setup.c @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <arch.h> +#include <arch_helpers.h> +#include "../bl1_private.h" + +/******************************************************************************* + * Function that does the first bit of architectural setup that affects + * execution in the non-secure address space. + ******************************************************************************/ +void bl1_arch_setup(void) +{ + /* Set the next EL to be AArch64 */ + write_scr_el3(read_scr_el3() | SCR_RW_BIT); +} + +/******************************************************************************* + * Set the Secure EL1 required architectural state + ******************************************************************************/ +void bl1_arch_next_el_setup(void) +{ + u_register_t next_sctlr; + + /* Use the same endianness than the current BL */ + next_sctlr = (read_sctlr_el3() & SCTLR_EE_BIT); + + /* Set SCTLR Secure EL1 */ + next_sctlr |= SCTLR_EL1_RES1; + + write_sctlr_el1(next_sctlr); +} |