82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
|
|
* Copyright (c) 2006-2019, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2019-11-01 Jesven The first version
|
|
* 2022-12-13 WangXiaoyao Hot-pluggable, extensible
|
|
* page management algorithm
|
|
*/
|
|
#ifndef __MM_PAGE_H__
|
|
#define __MM_PAGE_H__
|
|
|
|
#include <rthw.h>
|
|
#include <rtthread.h>
|
|
#include <stdint.h>
|
|
|
|
#define GET_FLOOR(type) \
|
|
(1ul << (8 * sizeof(rt_size_t) - __builtin_clzl(2 * sizeof(type) - 1) - 1))
|
|
#define DEF_PAGE_T(fields) \
|
|
typedef struct rt_page {\
|
|
union {struct {fields}; char _padding[GET_FLOOR(struct {fields})];};\
|
|
} *rt_page_t
|
|
|
|
DEF_PAGE_T(
|
|
struct rt_page *next; /* same level next */
|
|
struct rt_page *pre; /* same level pre */
|
|
|
|
rt_uint32_t size_bits; /* if is ARCH_ADDRESS_WIDTH_BITS, means not free */
|
|
rt_uint32_t ref_cnt; /* page group ref count */
|
|
);
|
|
|
|
#undef GET_FLOOR
|
|
#undef DEF_PAGE_T
|
|
|
|
typedef struct tag_region
|
|
{
|
|
rt_size_t start;
|
|
rt_size_t end;
|
|
} rt_region_t;
|
|
|
|
extern const rt_size_t rt_mpr_size;
|
|
extern void *rt_mpr_start;
|
|
|
|
void rt_page_init(rt_region_t reg);
|
|
|
|
void rt_page_cleanup(void);
|
|
|
|
void *rt_pages_alloc(rt_uint32_t size_bits);
|
|
|
|
void rt_page_ref_inc(void *addr, rt_uint32_t size_bits);
|
|
|
|
int rt_page_ref_get(void *addr, rt_uint32_t size_bits);
|
|
|
|
int rt_pages_free(void *addr, rt_uint32_t size_bits);
|
|
|
|
void rt_page_list(void);
|
|
|
|
rt_size_t rt_page_bits(rt_size_t size);
|
|
|
|
void rt_page_get_info(rt_size_t *total_nr, rt_size_t *free_nr);
|
|
|
|
void *rt_page_page2addr(struct rt_page *p);
|
|
|
|
struct rt_page *rt_page_addr2page(void *addr);
|
|
|
|
/**
|
|
* @brief Install page frames at run-time
|
|
* Region size must be aligned to 2^(RT_PAGE_MAX_ORDER + ARCH_PAGE_SHIFT - 1)
|
|
* bytes currently (typically 2 MB).
|
|
*
|
|
* !WARNING this API will NOT check whether region is valid or not in list
|
|
*
|
|
* @param region region.start as first page frame(inclusive),
|
|
* region.end as first page frame after free region
|
|
* @return int 0 on success
|
|
*/
|
|
int rt_page_install(rt_region_t region);
|
|
|
|
#endif /* __MM_PAGE_H__ */
|