1 files changed, 69 insertions, 0 deletions
diff --git a/lib/xlat_mpu/aarch64/xlat_mpu_arch.c b/lib/xlat_mpu/aarch64/xlat_mpu_arch.c
new file mode 100644
index 000000000..5068eb8d4
--- /dev/null
+++ b/lib/xlat_mpu/aarch64/xlat_mpu_arch.c
@@ -0,0 +1,69 @@
+/*
+ * 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;
+}
+