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5fb061e761
For v8-R64, especially R82, creating code to run BL1 at EL2, using MPU. Signed-off-by: Gary Morrison <gary.morrison@arm.com> Change-Id: I439ac3915b982ad1e61d24365bdd1584b3070425
32 lines
731 B
ArmAsm
32 lines
731 B
ArmAsm
/*
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* Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <asm_macros.S>
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.globl disable_mpu_el2
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.globl disable_mpu_icache_el2
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/* ---------------------------------------------------------------------------
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* Disable the MPU at EL2.
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* ---------------------------------------------------------------------------
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*/
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func disable_mpu_el2
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mov x1, #(SCTLR_M_BIT | SCTLR_C_BIT)
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do_disable_mpu_el2:
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mrs x0, sctlr_el2
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bic x0, x0, x1
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msr sctlr_el2, x0
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isb /* ensure MMU is off */
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dsb sy
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ret
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endfunc disable_mpu_el2
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func disable_mpu_icache_el2
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mov x1, #(SCTLR_M_BIT | SCTLR_C_BIT | SCTLR_I_BIT)
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b do_disable_mpu_el2
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endfunc disable_mpu_icache_el2
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