freebsd-skq/sys/contrib/octeon-sdk/cvmx-scratch.h

/***********************license start***************
 * Copyright (c) 2003-2010  Cavium Inc. (support@cavium.com). All rights
 * reserved.
 *
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *   * 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.

 *   * Neither the name of Cavium Inc. nor the names of
 *     its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written
 *     permission.

 * This Software, including technical data, may be subject to U.S. export  control
 * laws, including the U.S. Export Administration Act and its  associated
 * regulations, and may be subject to export or import  regulations in other
 * countries.

 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
 * AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
 * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
 * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
 * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
 * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
 * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
 * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
 * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE  RISK ARISING OUT OF USE OR
 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
 ***********************license end**************************************/







/**
 * @file
 *
 * This file provides support for the processor local scratch memory.
 * Scratch memory is byte addressable - all addresses are byte addresses.
 *
 *
 * <hr>$Revision: 70030 $<hr>
 *
 *
 */


#ifndef __CVMX_SCRATCH_H__
#define __CVMX_SCRATCH_H__

#ifdef	__cplusplus
extern "C" {
#endif

/* Note: This define must be a long, not a long long in order to compile
        without warnings for both 32bit and 64bit. */
#define CVMX_SCRATCH_BASE       (-32768l) /* 0xffffffffffff8000 */


/**
 * Reads an 8 bit value from the processor local scratchpad memory.
 *
 * @param address byte address to read from
 *
 * @return value read
 */
static inline uint8_t cvmx_scratch_read8(uint64_t address)
{
    return *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address);
}
/**
 * Reads a 16 bit value from the processor local scratchpad memory.
 *
 * @param address byte address to read from
 *
 * @return value read
 */
static inline uint16_t cvmx_scratch_read16(uint64_t address)
{
    return *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address);
}
/**
 * Reads a 32 bit value from the processor local scratchpad memory.
 *
 * @param address byte address to read from
 *
 * @return value read
 */
static inline uint32_t cvmx_scratch_read32(uint64_t address)
{
    return *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address);
}
/**
 * Reads a 64 bit value from the processor local scratchpad memory.
 *
 * @param address byte address to read from
 *
 * @return value read
 */
static inline uint64_t cvmx_scratch_read64(uint64_t address)
{
    return *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address);
}



/**
 * Writes an 8 bit value to the processor local scratchpad memory.
 *
 * @param address byte address to write to
 * @param value   value to write
 */
static inline void cvmx_scratch_write8(uint64_t address, uint64_t value)
{
    *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address) = (uint8_t)value;
}
/**
 * Writes a 32 bit value to the processor local scratchpad memory.
 *
 * @param address byte address to write to
 * @param value   value to write
 */
static inline void cvmx_scratch_write16(uint64_t address, uint64_t value)
{
    *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address) = (uint16_t)value;
}
/**
 * Writes a 16 bit value to the processor local scratchpad memory.
 *
 * @param address byte address to write to
 * @param value   value to write
 */
static inline void cvmx_scratch_write32(uint64_t address, uint64_t value)
{
    *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address) = (uint32_t)value;
}
/**
 * Writes a 64 bit value to the processor local scratchpad memory.
 *
 * @param address byte address to write to
 * @param value   value to write
 */
static inline void cvmx_scratch_write64(uint64_t address, uint64_t value)
{
    *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address) = value;
}

#ifdef	__cplusplus
}
#endif

#endif /* __CVMX_SCRATCH_H__ */