/***********************license start***************
* Author : Cavium Networks
*
* Contact : support @ caviumnetworks . com
* This file is part of the OCTEON SDK
*
* Copyright ( c ) 2003 - 2008 Cavium Networks
*
* This file is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License , Version 2 , as
* published by the Free Software Foundation .
*
* This file is distributed in the hope that it will be useful , but
* AS - IS and WITHOUT ANY WARRANTY ; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE , TITLE , or
* NONINFRINGEMENT . See the GNU General Public License for more
* details .
*
* You should have received a copy of the GNU General Public License
* along with this file ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA
* or visit http : //www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium .
* Contact Cavium Networks for more information
***********************license end**************************************/
/**
*
* This file provides support for the processor local scratch memory .
* Scratch memory is byte addressable - all addresses are byte addresses .
*
*/
#ifndef __CVMX_SCRATCH_H__
#define __CVMX_SCRATCH_H__
/*
* Note : This define must be a long , not a long long in order to
* compile without warnings for both 32 bit and 64 bit .
*/
#define CVMX_SCRATCH_BASE (-32768 l) /* 0xffffffffffff8000 */
/**
* Reads an 8 bit value from the processor local scratchpad memory .
*
* @ address : byte address to read from
*
* Returns 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 .
*
* @ address : byte address to read from
*
* Returns 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 .
*
* @ address : byte address to read from
*
* Returns 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 .
*
* @ address : byte address to read from
*
* Returns 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 .
*
* @ address : byte address to write to
* @ 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 .
*
* @ address : byte address to write to
* @ 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 .
*
* @ address : byte address to write to
* @ 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 .
*
* @ address : byte address to write to
* @ 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;
}
#endif /* __CVMX_SCRATCH_H__ */
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(vorverarbeitet am 2026-10-02)
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