232 lines
6.3 KiB
C
232 lines
6.3 KiB
C
/* Port and memory mapped registers I/O operations */
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/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __SYS_IO_H__
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#define __SYS_IO_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#include <stddef.h>
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typedef uint32_t io_port_t;
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typedef uint32_t mm_reg_t;
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typedef uint32_t mem_addr_t;
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/* Port I/O functions */
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/**
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* @fn static inline void sys_out8(uint8_t data, io_port_t port);
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* @brief Output a byte to an I/O port
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*
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* This function writes a byte to the given port.
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*
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* @param data the byte to write
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* @param port the port address where to write the byte
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*/
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/**
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* @fn static inline uint8_t sys_in8(io_port_t port);
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* @brief Input a byte from an I/O port
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*
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* This function reads a byte from the port.
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*
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* @param port the port address from where to read the byte
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*
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* @return the byte read
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*/
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/**
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* @fn static inline void sys_out16(uint16_t data, io_port_t port);
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* @brief Output a 16 bits to an I/O port
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*
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* This function writes a 16 bits to the given port.
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*
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* @param data the 16 bits to write
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* @param port the port address where to write the 16 bits
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*/
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/**
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* @fn static inline uint16_t sys_in16(io_port_t port);
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* @brief Input 16 bits from an I/O port
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*
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* This function reads 16 bits from the port.
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*
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* @param port the port address from where to read the 16 bits
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*
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* @return the 16 bits read
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*/
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/**
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* @fn static inline void sys_out32(uint32_t data, io_port_t port);
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* @brief Output 32 bits to an I/O port
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*
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* This function writes 32 bits to the given port.
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*
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* @param data the 32 bits to write
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* @param port the port address where to write the 32 bits
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*/
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/**
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* @fn static inline uint32_t sys_in32(io_port_t port);
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* @brief Input 32 bits from an I/O port
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*
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* This function reads 32 bits from the port.
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*
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* @param port the port address from where to read the 32 bits
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*
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* @return the 32 bits read
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*/
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/* Memory mapped registers I/O functions */
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/**
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* @fn static inline void sys_write8(uint8_t data, mm_reg_t addr);
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* @brief Write a byte to a memory mapped register
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*
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* This function writes a byte to the given memory mapped register.
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*
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* @param data the byte to write
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* @param addr the memory mapped register address where to write the byte
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*/
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/**
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* @fn static inline uint8_t sys_read8(mm_reg_t addr);
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* @brief Read a byte from a memory mapped register
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*
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* This function reads a byte from the given memory mapped register.
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*
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* @param addr the memory mapped register address from where to read the byte
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*
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* @return the byte read
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*/
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/**
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* @fn static inline void sys_write16(uint16_t data, mm_reg_t addr);
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* @brief Write 16 bits to a memory mapped register
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*
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* This function writes 16 bits to the given memory mapped register.
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*
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* @param data the 16 bits to write
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* @param addr the memory mapped register address where to write the 16 bits
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*/
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/**
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* @fn static inline uint16_t sys_read16(mm_reg_t addr);
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* @brief Read 16 bits from a memory mapped register
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*
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* This function reads 16 bits from the given memory mapped register.
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*
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* @param addr the memory mapped register address from where to read
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* the 16 bits
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*
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* @return the 16 bits read
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*/
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/**
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* @fn static inline void sys_write32(uint32_t data, mm_reg_t addr);
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* @brief Write 32 bits to a memory mapped register
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*
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* This function writes 32 bits to the given memory mapped register.
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*
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* @param data the 32 bits to write
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* @param addr the memory mapped register address where to write the 32 bits
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*/
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/**
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* @fn static inline uint32_t sys_read32(mm_reg_t addr);
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* @brief Read 32 bits from a memory mapped register
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*
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* This function reads 32 bits from the given memory mapped register.
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*
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* @param addr the memory mapped register address from where to read
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* the 32 bits
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*
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* @return the 32 bits read
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*/
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/* Memory bits manipulation functions */
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/**
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* @fn static inline void sys_set_bit(mem_addr_t addr, int bit)
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* @brief Set the designated bit from addr to 1
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*
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* This functions takes the designated bit starting from addr and sets it to 1.
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*
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* @param addr the memory address from where to look for the bit
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* @param bit the designated bit to set (from 0 to n)
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*/
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/**
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* @fn static inline void sys_clear_bit(mem_addr_t addr, int bit)
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* @brief Clear the designated bit from addr to 0
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*
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* This functions takes the designated bit starting from addr and sets it to 0.
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*
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* @param addr the memory address from where to look for the bit
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* @param bit the designated bit to clear (from 0 to n)
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*/
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/**
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* @fn static inline int sys_test_bit(mem_addr_t addr, int bit)
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* @brief Test the bit if it is set or not
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*
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* This functions takes the designated bit starting from addr and tests its
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* current setting. If it return the current setting.
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*
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* @param addr the memory address from where to look for the bit
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* @param bit the designated bit to test (from 0 to n)
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*
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* @return 1 if it is set, 0 otherwise
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*/
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/**
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* @fn static inline int sys_test_and_set_bit(mem_addr_t addr, int bit)
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* @brief Test the bit and set it
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*
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* This functions takes the designated bit starting from addr, tests its
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* current setting and sets it. It will return the previous setting.
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*
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* @param addr the memory address from where to look for the bit
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* @param bit the designated bit to test and set (from 0 to n)
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*
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* @return 1 if it was set, 0 otherwise
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*/
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/**
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* @fn static inline int sys_test_and_clear_bit(mem_addr_t addr, int bit)
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* @brief Test the bit and clear it
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*
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* This functions takes the designated bit starting from addr, test its
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* current setting and clears it. It will return the previous setting.
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*
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* @param addr the memory address from where to look for the bit
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* @param bit the designated bit to test (from 0 to n)
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*
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* @return 0 if it was clear, 1 otherwise
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* __SYS_IO_H__ */
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