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/*
* Copyright (c) 2006-2020, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-05-06 Jesven first version
*/
#ifndef __IOREMAP_H__
#define __IOREMAP_H__
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* IOREMAP family
* `rt_ioremap` default to map physical memory in MMIO region as DEVICE memory
* to kernel space. And there are 3 variants currently supported.
*
* name | attribution
* ------------------ | -----------
* rt_ioremap_nocache | Device (MMU_MAP_K_DEVICE)
* rt_ioremap_cache | Normal memory (MMU_MAP_K_RWCB)
* rt_ioremap_wt | Normal memory but guarantee that
* | Each write access should go to system memory directly
* | Currently as non-cacheable
*/
void *rt_ioremap_early(void *paddr, size_t size);
void *rt_ioremap(void *paddr, size_t size);
void *rt_ioremap_nocache(void *paddr, size_t size);
void *rt_ioremap_cached(void *paddr, size_t size);
void *rt_ioremap_wt(void *paddr, size_t size);
void rt_iounmap(volatile void *addr);
extern void *rt_ioremap_start;
extern size_t rt_ioremap_size;
#ifdef __cplusplus
}
#endif
#endif /*__LWP_IOREMAP_H__*/
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