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arch/include/armv7-r/mpu.h

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+/*
+ * mpu.h
+ *
+ * Copyright (c) 2019 Semidrive Semiconductor.
+ * All rights reserved.
+ *
+ * Description: Cortex V7R MPU driver.
+ *
+ * Revision History:
+ * -----------------
+ */
+#ifndef INCLUDE_ARCH_ARMV7R_MPU_H
+#define INCLUDE_ARCH_ARMV7R_MPU_H
+
+/*
+ * Memory types supported by the MPU driver.
+ */
+typedef enum mpu_region_type {
+    /* Strong ordered
+     *  - non-bufferable, non-cachable, shareable, RW, XN
+     */
+    MPU_REGION_STRONGORDERED,
+
+    /* Device memory
+     *  - bufferable, non-cachable, shareable, RW, XN
+     */
+    MPU_REGION_DEVICE,
+
+    /* Normal memory
+     *  - bufferable, outer and inner write-back & write allocate,
+     *    shareble, RW, non XN
+     */
+    MPU_REGION_NORMAL,
+
+    /* Normal non-cacheable memory
+     *  - bufferable, outer and inner non-cacheable, shareble, RW,
+     *    non XN
+     */
+    MPU_REGION_NORMAL_NONCACHEABLE,
+
+    /* Normal ready-only memory
+     *  - bufferable, outer and inner wb, no wa, no shareble, RO,
+     *    non XN
+     */
+    MPU_REGION_NORMAL_RO,
+
+    /* Not accessable.
+     */
+    MPU_REGION_NO_ACCESS,
+
+    MPU_REGION_MAX,
+} mpu_region_type_e;
+
+#ifndef ASSEMBLY
+
+#include <compiler.h>
+#include <stdbool.h>
+#include <types.h>
+
+typedef struct mpu_config {
+    addr_t              addr;
+    uint64_t            size;
+    mpu_region_type_e   type;
+} mpu_config_t;
+
+__BEGIN_CDECLS
+
+#if CONFIG_ARCH_WITH_MPU
+void mpu_clear_region(void);
+#else
+#define mpu_clear_region()
+#endif
+
+#if CONFIG_ARCH_WITH_MPU
+void mpu_add_region(int region, uint32_t base, uint64_t size,
+                    mpu_region_type_e type);
+#else
+#define mpu_add_region(region, base, size, type)
+#endif
+
+uint32_t mpu_region_index(void);
+
+#if CONFIG_ARCH_WITH_MPU
+void mpu_enable(bool enable);
+#else
+#define mpu_enable(enable)
+#endif
+
+#if CONFIG_ARCH_WITH_MPU
+bool mpu_is_belong_uncache_region(uint32_t base, uint32_t size);
+#else
+#define mpu_is_belong_uncache_region(base, size)
+#endif
+
+#if CONFIG_ARCH_WITH_MPU
+void mpu_region_set_type(uint32_t base, uint64_t size,
+                         mpu_region_type_e type);
+#else
+#define mpu_region_set_type(base, size, type)
+#endif
+
+__END_CDECLS
+
+#endif /* ASSEMBLY */
+
+#endif