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/***********************license start***************
* Copyright (c) 2003-2008 Cavium Networks (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 Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM NETWORKS 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.
*
*
* For any questions regarding licensing please contact marketing@caviumnetworks.com
*
***********************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: 41586 $<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__ */
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