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/*
* Copyright (c) 2021, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include "../xlat_mpu_private.h"
#include <arch.h>
#include <arch_features.h>
#include <lib/cassert.h>
#include <lib/utils_def.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <fvp_r_arch_helpers.h>
#warning "xlat_mpu library is currently experimental and its API may change in future."
#if ENABLE_ASSERTIONS
/*
* Return minimum virtual address space size supported by the architecture
*/
uintptr_t xlat_get_min_virt_addr_space_size(void)
{
uintptr_t ret;
if (is_armv8_4_ttst_present()) {
ret = MIN_VIRT_ADDR_SPACE_SIZE_TTST;
} else {
ret = MIN_VIRT_ADDR_SPACE_SIZE;
}
return ret;
}
#endif /* ENABLE_ASSERTIONS*/
bool is_mpu_enabled_ctx(const xlat_ctx_t *ctx)
{
if (ctx->xlat_regime == EL1_EL0_REGIME) {
assert(xlat_arch_current_el() >= 1U);
return (read_sctlr_el1() & SCTLR_M_BIT) != 0U;
} else {
assert(xlat_arch_current_el() >= 2U);
return (read_sctlr_el2() & SCTLR_M_BIT) != 0U;
}
}
bool is_dcache_enabled(void)
{
unsigned int el = get_current_el();
if (el == 1U) {
return (read_sctlr_el1() & SCTLR_C_BIT) != 0U;
} else { /* must be EL2 */
return (read_sctlr_el2() & SCTLR_C_BIT) != 0U;
}
}
unsigned int xlat_arch_current_el(void)
{
unsigned int el = (unsigned int)GET_EL(read_CurrentEl());
assert(el > 0U);
return el;
}
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