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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
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/*
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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 <assert.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include "../xlat_mpu_private.h"
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#include <arch.h>
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#include <arch_features.h>
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#include <lib/cassert.h>
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#include <lib/utils_def.h>
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#include <lib/xlat_tables/xlat_tables_v2.h>
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#include <fvp_r_arch_helpers.h>
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#warning "xlat_mpu library is currently experimental and its API may change in future."
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#if ENABLE_ASSERTIONS
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/*
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* Return minimum virtual address space size supported by the architecture
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*/
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uintptr_t xlat_get_min_virt_addr_space_size(void)
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{
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uintptr_t ret;
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if (is_armv8_4_ttst_present()) {
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ret = MIN_VIRT_ADDR_SPACE_SIZE_TTST;
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} else {
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ret = MIN_VIRT_ADDR_SPACE_SIZE;
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}
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return ret;
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}
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#endif /* ENABLE_ASSERTIONS*/
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bool is_mpu_enabled_ctx(const xlat_ctx_t *ctx)
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{
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if (ctx->xlat_regime == EL1_EL0_REGIME) {
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assert(xlat_arch_current_el() >= 1U);
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return (read_sctlr_el1() & SCTLR_M_BIT) != 0U;
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} else {
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assert(xlat_arch_current_el() >= 2U);
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return (read_sctlr_el2() & SCTLR_M_BIT) != 0U;
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}
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}
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bool is_dcache_enabled(void)
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{
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unsigned int el = get_current_el();
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if (el == 1U) {
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return (read_sctlr_el1() & SCTLR_C_BIT) != 0U;
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} else { /* must be EL2 */
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return (read_sctlr_el2() & SCTLR_C_BIT) != 0U;
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}
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}
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unsigned int xlat_arch_current_el(void)
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{
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unsigned int el = (unsigned int)GET_EL(read_CurrentEl());
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assert(el > 0U);
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return el;
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}
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