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/* Copyright 2019 SiFive, Inc */
/* SPDX-License-Identifier: Apache-2.0 */
#ifndef METAL__MEMORY_H
#define METAL__MEMORY_H
#include <stdint.h>
#include <stddef.h>
/*!
* @file memory.h
*
* @brief API for enumerating memory blocks
*/
struct _metal_memory_attributes {
int R : 1;
int W : 1;
int X : 1;
int C : 1;
int A : 1;
};
/*!
* @brief A handle for a memory block
*/
struct metal_memory {
const uintptr_t _base_address;
const size_t _size;
const struct _metal_memory_attributes _attrs;
};
/*!
* @brief Get the memory block which services the given address
*
* Given a physical memory address, get a handle for the memory block to which
* that address is mapped.
*
* @param address The address to query
* @return The memory block handle, or NULL if the address is not mapped to a memory block
*/
struct metal_memory *metal_get_memory_from_address(const uintptr_t address);
/*!
* @brief Get the base address for a memory block
* @param memory The handle for the memory block
* @return The base address of the memory block
*/
inline uintptr_t metal_memory_get_base_address(const struct metal_memory *memory) {
return memory->_base_address;
}
/*!
* @brief Get the size of a memory block
* @param memory The handle for the memory block
* @return The size of the memory block
*/
inline size_t metal_memory_get_size(const struct metal_memory *memory) {
return memory->_size;
}
/*!
* @brief Query if a memory block supports atomic operations
* @param memory The handle for the memory block
* @return nonzero if the memory block supports atomic operations
*/
inline int metal_memory_supports_atomics(const struct metal_memory *memory) {
return memory->_attrs.A;
}
/*!
* @brief Query if a memory block is cacheable
* @param memory The handle for the memory block
* @return nonzero if the memory block is cachable
*/
inline int metal_memory_is_cachable(const struct metal_memory *memory) {
return memory->_attrs.C;
}
#endif /* METAL__MEMORY_H */
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