41 lines
605 B
ArmAsm
41 lines
605 B
ArmAsm
/*
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* Copyright (c) 2021 Carlo Caione <ccaione@baylibre.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <toolchain.h>
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#include <linker/sections.h>
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#include <arch/cpu.h>
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_ASM_FILE_PROLOGUE
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/*
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* Switch TTBR0
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*/
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GTEXT(z_arm64_set_ttbr0)
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SECTION_FUNC(TEXT, z_arm64_set_ttbr0)
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/* Disable all the caches */
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mrs x2, sctlr_el1
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mov_imm x1, (SCTLR_M_BIT | SCTLR_C_BIT | SCTLR_I_BIT)
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and x1, x2, x1
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msr sctlr_el1, x1
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isb
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/* Invalidate the TLBs */
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tlbi vmalle1
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dsb sy
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isb
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/* Switch the TTBR0 */
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msr ttbr0_el1, x0
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isb
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/* Restore the saved SCTLR_EL1 */
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msr sctlr_el1, x2
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isb
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ret
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