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Diffstat (limited to '')
| -rw-r--r-- | plat/arm/board/fvp_r/fvp_r_misc_helpers.S | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/plat/arm/board/fvp_r/fvp_r_misc_helpers.S b/plat/arm/board/fvp_r/fvp_r_misc_helpers.S new file mode 100644 index 0000000..67ad164 --- /dev/null +++ b/plat/arm/board/fvp_r/fvp_r_misc_helpers.S @@ -0,0 +1,32 @@ +/* + * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <asm_macros.S> + + .globl disable_mpu_el2 + .globl disable_mpu_icache_el2 + +/* --------------------------------------------------------------------------- + * Disable the MPU at EL2. + * --------------------------------------------------------------------------- + */ + +func disable_mpu_el2 + mov x1, #(SCTLR_M_BIT | SCTLR_C_BIT) +do_disable_mpu_el2: + mrs x0, sctlr_el2 + bic x0, x0, x1 + msr sctlr_el2, x0 + isb /* ensure MMU is off */ + dsb sy + ret +endfunc disable_mpu_el2 + + +func disable_mpu_icache_el2 + mov x1, #(SCTLR_M_BIT | SCTLR_C_BIT | SCTLR_I_BIT) + b do_disable_mpu_el2 +endfunc disable_mpu_icache_el2 |