/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2019 Rockchip Electronics Co., Ltd
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*/
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#ifndef _BIDRAM_H
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#define _BIDRAM_H
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#include <memblk.h>
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typedef struct memblock *(*parse_fn_t)(int *);
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struct bidram {
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struct lmb lmb;
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struct list_head reserved_head;
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bool has_init;
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bool fixup;
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u64 base_u64[MEM_RESV_COUNT]; /* 4GB+ */
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u64 size_u64[MEM_RESV_COUNT];
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};
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#ifdef CONFIG_BIDRAM
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/**
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* bidram_initr() - Initial bidram after relocation.
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*
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* @return 0 on success, otherwise error
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*/
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int bidram_initr(void);
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/**
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* bidram_get_ram_size() - Initial bidram and get ram size.
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*
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* @parse_fn: function to parse ddr memory regions
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*
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* @return ram size, 0 on success, otherwise the effect ram size.
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*/
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phys_size_t bidram_get_ram_size(void);
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/**
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* bidram_gen_gd_bi_dram() - Update gd->bd->bi_dram[] according to bidram state.
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*/
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void bidram_gen_gd_bi_dram(void);
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/**
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* bidram_reserve() - Reserve bidram region
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*
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* @id: memblk id
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* @base: region base address
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* @size: region size
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*
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* @return 0 on success, otherwise error
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*/
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int bidram_reserve(enum memblk_id id, phys_addr_t base, phys_size_t size);
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/**
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* bidram_reserve_by_name() - Reserve bidram region by name
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*
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* @name: region name
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* @base: region base address
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* @size: region size
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*
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* @return 0 on success, otherwise error
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*/
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int bidram_reserve_by_name(const char *name, phys_addr_t base, phys_size_t size);
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/**
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* bidram_dump_all() - Dump all bidram stat
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*/
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void bidram_dump(void);
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/**
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* bidram_fixup() - Fixup bi_dram[] for 4GB+ memory
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*
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* @return 0 on success, otherwise error
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*/
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int bidram_fixup(void);
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/**
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* bidram_append_size() - Append 4GB+ memory
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*
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* @return 4GB+ size
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*/
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u64 bidram_append_size(void);
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/**
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* bidram_reserved_is_overlap() - Check outside memory is overlap with reserved
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*
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* @base: region base address
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* @size: region size
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*
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* @return memblk struct when overlap, otherwise NULL
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*/
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struct memblock *bidram_reserved_is_overlap(phys_addr_t base, phys_size_t size);
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/**
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* board_bidram_parse_fn() - Weak function for board to implement
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*/
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parse_fn_t board_bidram_parse_fn(void);
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/**
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* board_bidram_reserve() - Weak function for board to implement
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*
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* @bidram: global bidram point, ignored
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*
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* @return 0 on success, otherwise error
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*/
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int board_bidram_reserve(struct bidram *bidram);
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#else
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static inline int bidram_initr(void) { return 0; }
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static inline phys_size_t bidram_get_ram_size(void) { return 0; }
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static inline void bidram_gen_gd_bi_dram(void) { }
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static inline int bidram_reserve(enum memblk_id id, phys_addr_t base,
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phys_size_t size) { return 0; }
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static inline int bidram_reserve_by_name(const char *name, phys_addr_t base,
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phys_size_t size) { return 0; }
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static inline void bidram_dump(void) {}
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static inline int bidram_fixup(void) { return 0; }
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static inline u64 bidram_append_size(void) { return 0; }
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static inline parse_fn_t board_bidram_parse_fn(void) { return NULL; }
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static inline int board_bidram_reserve(struct bidram *bidram) { return 0; }
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static inline struct memblock *
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bidram_reserved_is_overlap(phys_addr_t base, phys_size_t size)
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{
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return NULL;
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}
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#endif
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#endif /* _BIDRAM_H */
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