140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/***********************license start***************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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* This file is part of the OCTEON SDK
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*
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* Copyright (c) 2003-2008 Cavium Networks
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* or visit http://www.gnu.org/licenses/.
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*
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* This file may also be available under a different license from Cavium.
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* Contact Cavium Networks for more information
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***********************license end**************************************/
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/**
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*
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* This file provides support for the processor local scratch memory.
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* Scratch memory is byte addressable - all addresses are byte addresses.
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*
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*/
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#ifndef __CVMX_SCRATCH_H__
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#define __CVMX_SCRATCH_H__
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/*
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* Note: This define must be a long, not a long long in order to
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* compile without warnings for both 32bit and 64bit.
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*/
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#define CVMX_SCRATCH_BASE (-32768l) /* 0xffffffffffff8000 */
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/**
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* Reads an 8 bit value from the processor local scratchpad memory.
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*
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* @address: byte address to read from
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*
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* Returns value read
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*/
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static inline uint8_t cvmx_scratch_read8(uint64_t address)
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{
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return *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address);
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}
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/**
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* Reads a 16 bit value from the processor local scratchpad memory.
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*
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* @address: byte address to read from
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*
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* Returns value read
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*/
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static inline uint16_t cvmx_scratch_read16(uint64_t address)
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{
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return *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address);
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}
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/**
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* Reads a 32 bit value from the processor local scratchpad memory.
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*
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* @address: byte address to read from
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*
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* Returns value read
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*/
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static inline uint32_t cvmx_scratch_read32(uint64_t address)
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{
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return *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address);
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}
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/**
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* Reads a 64 bit value from the processor local scratchpad memory.
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*
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* @address: byte address to read from
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*
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* Returns value read
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*/
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static inline uint64_t cvmx_scratch_read64(uint64_t address)
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{
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return *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address);
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}
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/**
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* Writes an 8 bit value to the processor local scratchpad memory.
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*
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* @address: byte address to write to
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* @value: value to write
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*/
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static inline void cvmx_scratch_write8(uint64_t address, uint64_t value)
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{
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*CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address) =
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(uint8_t) value;
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}
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/**
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* Writes a 32 bit value to the processor local scratchpad memory.
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*
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* @address: byte address to write to
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* @value: value to write
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*/
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static inline void cvmx_scratch_write16(uint64_t address, uint64_t value)
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{
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*CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address) =
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(uint16_t) value;
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}
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/**
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* Writes a 16 bit value to the processor local scratchpad memory.
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*
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* @address: byte address to write to
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* @value: value to write
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*/
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static inline void cvmx_scratch_write32(uint64_t address, uint64_t value)
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{
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*CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address) =
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(uint32_t) value;
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}
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/**
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* Writes a 64 bit value to the processor local scratchpad memory.
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*
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* @address: byte address to write to
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* @value: value to write
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*/
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static inline void cvmx_scratch_write64(uint64_t address, uint64_t value)
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{
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*CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address) = value;
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}
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#endif /* __CVMX_SCRATCH_H__ */
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