添加rtthread相关代码

riscv/rtthread/components/mm/mm_memblock.h

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+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-09-07     zmshahaha    the first version
+ */
+
+#ifndef __MM_MEMBLOCK_H__
+#define __MM_MEMBLOCK_H__
+
+#include "mm_page.h"
+#include <rtdef.h>
+
+enum mmblk_flag
+{
+    MEMBLOCK_NONE       = 0x0,      /**< normal region */
+    MEMBLOCK_HOTPLUG    = 0x1,      /**< hotpluggable region */
+    MEMBLOCK_NOMAP      = 0x2,      /**< don't add to kernel direct mapping */
+};
+
+typedef rt_uint32_t mmblk_flag_t;
+
+/**
+ * @struct rt_mmblk_reg
+ *
+ * @brief A structure representing a region in rt_memblock
+ */
+struct rt_mmblk_reg
+{
+    rt_region_t memreg;             /**< used to indicate the extent of this area */
+    mmblk_flag_t flags;             /**< the flag of the region */
+    rt_bool_t alloc;                /**< is the node allocated */
+    rt_slist_t node;                /**< hook on rt_memblock */
+};
+
+/**
+ * @struct rt_memblock
+ *
+ * @brief A structure representing physical memory block
+ */
+struct rt_memblock
+{
+    rt_slist_t reg_list;           /**< store the regions of the memory block */
+};
+
+/**
+ * @brief Add a physical address range to the overall memory region
+ *
+ * @note The newly added region is strictly prohibited from overlapping with existing regions.
+ *
+ * @param name the name of the region
+ * @param start the beginning of the physical address range
+ * @param end the size of the physical address range
+ * @param flags the flags of the region
+ */
+rt_err_t rt_memblock_add_memory(char *name, rt_size_t start, rt_size_t end, mmblk_flag_t flags);
+
+/**
+ * @brief Add a physical address range to the reserved memory region
+ *
+ * @note The newly added region is strictly prohibited from overlapping with existing regions.
+ *
+ * @param name the name of the reseved region
+ * @param start the beginning of the physical address range
+ * @param end the size of the physical address range
+ * @param flags the flags of the region
+ */
+rt_err_t rt_memblock_reserve_memory(char *name, rt_size_t start, rt_size_t end, mmblk_flag_t flags);
+
+/**
+ * @brief To conclude the management of memory by the memblock.
+ *
+ * @note This function will free all usable to buddy system and map all memory without
+ * specified MEMBLOCK_NOMAP.
+ */
+void rt_memblock_setup_memory_environment(void);
+
+/**
+ * @brief Get the memory memblock.
+ *
+ * @return Overall memory memblock.
+ */
+struct rt_memblock *rt_memblock_get_memory(void);
+
+/**
+ * @brief Get the reserved memory memblock.
+ *
+ * @return Reserved memory memblock.
+ */
+struct rt_memblock *rt_memblock_get_reserved(void);
+
+#endif /* __MM_MEMBLOCK_H__ */