GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/trusted-firmware/trusted-firmware-a-2.8/lib/xlat_mpu/xlat_mpu_context.c

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+
+#include <common/debug.h>
+
+#include "lib/xlat_mpu/xlat_mpu.h"
+#include <lib/xlat_tables/xlat_tables_defs.h>
+#include <lib/xlat_tables/xlat_tables_v2.h>
+#include "xlat_mpu_private.h"
+
+#include <fvp_r_arch_helpers.h>
+#include <platform_def.h>
+
+#warning "xlat_mpu library is currently experimental and its API may change in future."
+
+
+/*
+ * MMU configuration register values for the active translation context. Used
+ * from the MMU assembly helpers.
+ */
+uint64_t mmu_cfg_params[MMU_CFG_PARAM_MAX];
+
+/*
+ * Allocate and initialise the default translation context for the BL image
+ * currently executing.
+ */
+REGISTER_XLAT_CONTEXT(tf, MAX_MMAP_REGIONS, MAX_XLAT_TABLES,
+			PLAT_VIRT_ADDR_SPACE_SIZE, PLAT_PHY_ADDR_SPACE_SIZE);
+
+void mmap_add(const mmap_region_t *mm)
+{
+	mmap_add_ctx(&tf_xlat_ctx, mm);
+}
+
+void __init init_xlat_tables(void)
+{
+	assert(tf_xlat_ctx.xlat_regime == EL_REGIME_INVALID);
+
+	unsigned int current_el = xlat_arch_current_el();
+
+	if (current_el == 1U) {
+		tf_xlat_ctx.xlat_regime = EL1_EL0_REGIME;
+	} else {
+		assert(current_el == 2U);
+		tf_xlat_ctx.xlat_regime = EL2_REGIME;
+	}
+	/* Note:  If EL3 is supported in future v8-R64, add EL3 assignment */
+	init_xlat_tables_ctx(&tf_xlat_ctx);
+}
+
+int xlat_get_mem_attributes(uintptr_t base_va, uint32_t *attr)
+{
+	return xlat_get_mem_attributes_ctx(&tf_xlat_ctx, base_va, attr);
+}
+
+void enable_mpu_el2(unsigned int flags)
+{
+	/* EL2 is strictly MPU on v8-R64, so no need for setup_mpu_cfg() */
+	enable_mpu_direct_el2(flags);
+}