rte_io.h

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/*
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 *
 *   Copyright(c) 2016 Cavium networks. All rights reserved.
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 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
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 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _RTE_IO_H_
#define _RTE_IO_H_

#include <rte_atomic.h>

#include <stdint.h>
#include <rte_common.h>
#include <rte_atomic.h>

#ifdef __DOXYGEN__

static inline uint8_t
rte_read8_relaxed(const volatile void *addr);

static inline uint16_t
rte_read16_relaxed(const volatile void *addr);

static inline uint32_t
rte_read32_relaxed(const volatile void *addr);

static inline uint64_t
rte_read64_relaxed(const volatile void *addr);

static inline void
rte_write8_relaxed(uint8_t value, volatile void *addr);

static inline void
rte_write16_relaxed(uint16_t value, volatile void *addr);

static inline void
rte_write32_relaxed(uint32_t value, volatile void *addr);

static inline void
rte_write64_relaxed(uint64_t value, volatile void *addr);

static inline uint8_t
rte_read8(const volatile void *addr);

static inline uint16_t
rte_read16(const volatile void *addr);

static inline uint32_t
rte_read32(const volatile void *addr);

static inline uint64_t
rte_read64(const volatile void *addr);

static inline void
rte_write8(uint8_t value, volatile void *addr);

static inline void
rte_write16(uint16_t value, volatile void *addr);

static inline void
rte_write32(uint32_t value, volatile void *addr);

static inline void
rte_write64(uint64_t value, volatile void *addr);

#endif /* __DOXYGEN__ */

#ifndef RTE_OVERRIDE_IO_H

static inline uint8_t __attribute__((always_inline))
rte_read8_relaxed(const volatile void *addr)
{
        return *(const volatile uint8_t *)addr;
}

static inline uint16_t __attribute__((always_inline))
rte_read16_relaxed(const volatile void *addr)
{
        return *(const volatile uint16_t *)addr;
}

static inline uint32_t __attribute__((always_inline))
rte_read32_relaxed(const volatile void *addr)
{
        return *(const volatile uint32_t *)addr;
}

static inline uint64_t __attribute__((always_inline))
rte_read64_relaxed(const volatile void *addr)
{
        return *(const volatile uint64_t *)addr;
}

static inline void __attribute__((always_inline))
rte_write8_relaxed(uint8_t value, volatile void *addr)
{
        *(volatile uint8_t *)addr = value;
}

static inline void __attribute__((always_inline))
rte_write16_relaxed(uint16_t value, volatile void *addr)
{
        *(volatile uint16_t *)addr = value;
}

static inline void __attribute__((always_inline))
rte_write32_relaxed(uint32_t value, volatile void *addr)
{
        *(volatile uint32_t *)addr = value;
}

static inline void __attribute__((always_inline))
rte_write64_relaxed(uint64_t value, volatile void *addr)
{
        *(volatile uint64_t *)addr = value;
}

static inline uint8_t __attribute__((always_inline))
rte_read8(const volatile void *addr)
{
        uint8_t val;
        val = rte_read8_relaxed(addr);
        rte_io_rmb();
        return val;
}

static inline uint16_t __attribute__((always_inline))
rte_read16(const volatile void *addr)
{
        uint16_t val;
        val = rte_read16_relaxed(addr);
        rte_io_rmb();
        return val;
}

static inline uint32_t  __attribute__((always_inline))
rte_read32(const volatile void *addr)
{
        uint32_t val;
        val = rte_read32_relaxed(addr);
        rte_io_rmb();
        return val;
}

static inline uint64_t __attribute__((always_inline))
rte_read64(const volatile void *addr)
{
        uint64_t val;
        val = rte_read64_relaxed(addr);
        rte_io_rmb();
        return val;
}

static inline void __attribute__((always_inline))
rte_write8(uint8_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write8_relaxed(value, addr);
}

static inline void __attribute__((always_inline))
rte_write16(uint16_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write16_relaxed(value, addr);
}

static inline void __attribute__((always_inline))
rte_write32(uint32_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write32_relaxed(value, addr);
}

static inline void __attribute__((always_inline))
rte_write64(uint64_t value, volatile void *addr)
{
        rte_io_wmb();
        rte_write64_relaxed(value, addr);
}

#endif /* RTE_OVERRIDE_IO_H */

#endif /* _RTE_IO_H_ */