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/* SPDX-License-Identifier: Apache-2.0 */
/* Copyright (C) 2018 IBM Corp. */
#ifndef WINDOWS_H
#define WINDOWS_H
#include <stdbool.h>
#define WINDOWS_NO_FLUSH false
#define WINDOWS_WITH_FLUSH true
struct mbox_context;
/* Window Dirty/Erase bytemap masks */
#define WINDOW_CLEAN 0x00
#define WINDOW_DIRTY 0x01
#define WINDOW_ERASED 0x02
#define FLASH_OFFSET_UNINIT 0xFFFFFFFF
struct window_context {
void *mem; /* Portion of Reserved Memory Region */
uint32_t flash_offset; /* Flash area the window maps (bytes) */
uint32_t size; /* Window Size (bytes) power-of-2 */
uint8_t *dirty_bmap; /* Bytemap of the dirty/erased state */
uint32_t age; /* Used for LRU eviction scheme */
};
struct window_list {
uint32_t num;
uint32_t max_age;
uint32_t default_size;
struct window_context *window;
};
/* Initialisation Functions */
int windows_init(struct mbox_context *context);
void windows_free(struct mbox_context *context);
/* Write From Window Functions */
int window_flush_v1(struct mbox_context *context,
uint32_t offset_bytes, uint32_t count_bytes);
int window_flush(struct mbox_context *context, uint32_t offset,
uint32_t count, uint8_t type);
/* Window Management Functions */
void windows_alloc_dirty_bytemap(struct mbox_context *context);
int window_set_bytemap(struct mbox_context *context, struct window_context *cur,
uint32_t offset, uint32_t size, uint8_t val);
void windows_close_current(struct mbox_context *context, uint8_t flags);
void window_reset(struct mbox_context *context, struct window_context *window);
bool windows_reset_all(struct mbox_context *context);
struct window_context *windows_find_oldest(struct mbox_context *context);
struct window_context *windows_find_largest(struct mbox_context *context);
struct window_context *windows_search(struct mbox_context *context,
uint32_t offset, bool exact);
int windows_create_map(struct mbox_context *context,
struct window_context **this_window,
uint32_t offset, bool exact);
#endif /* WINDOWS_H */
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