1/***********************license start*************** 2 * Author: Cavium Networks 3 * 4 * Contact: support@caviumnetworks.com 5 * This file is part of the OCTEON SDK 6 * 7 * Copyright (c) 2003-2008 Cavium Networks 8 * 9 * This file is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License, Version 2, as 11 * published by the Free Software Foundation. 12 * 13 * This file is distributed in the hope that it will be useful, but 14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty 15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or 16 * NONINFRINGEMENT. See the GNU General Public License for more 17 * details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this file; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 * or visit http://www.gnu.org/licenses/. 23 * 24 * This file may also be available under a different license from Cavium. 25 * Contact Cavium Networks for more information 26 ***********************license end**************************************/ 27 28/** 29 * 30 * This file provides support for the processor local scratch memory. 31 * Scratch memory is byte addressable - all addresses are byte addresses. 32 * 33 */ 34 35#ifndef __CVMX_SCRATCH_H__ 36#define __CVMX_SCRATCH_H__ 37 38/* 39 * Note: This define must be a long, not a long long in order to 40 * compile without warnings for both 32bit and 64bit. 41 */ 42#define CVMX_SCRATCH_BASE (-32768l) /* 0xffffffffffff8000 */ 43 44/** 45 * Reads an 8 bit value from the processor local scratchpad memory. 46 * 47 * @address: byte address to read from 48 * 49 * Returns value read 50 */ 51static inline uint8_t cvmx_scratch_read8(uint64_t address) 52{ 53 return *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address); 54} 55 56/** 57 * Reads a 16 bit value from the processor local scratchpad memory. 58 * 59 * @address: byte address to read from 60 * 61 * Returns value read 62 */ 63static inline uint16_t cvmx_scratch_read16(uint64_t address) 64{ 65 return *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address); 66} 67 68/** 69 * Reads a 32 bit value from the processor local scratchpad memory. 70 * 71 * @address: byte address to read from 72 * 73 * Returns value read 74 */ 75static inline uint32_t cvmx_scratch_read32(uint64_t address) 76{ 77 return *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address); 78} 79 80/** 81 * Reads a 64 bit value from the processor local scratchpad memory. 82 * 83 * @address: byte address to read from 84 * 85 * Returns value read 86 */ 87static inline uint64_t cvmx_scratch_read64(uint64_t address) 88{ 89 return *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address); 90} 91 92/** 93 * Writes an 8 bit value to the processor local scratchpad memory. 94 * 95 * @address: byte address to write to 96 * @value: value to write 97 */ 98static inline void cvmx_scratch_write8(uint64_t address, uint64_t value) 99{ 100 *CASTPTR(volatile uint8_t, CVMX_SCRATCH_BASE + address) = 101 (uint8_t) value; 102} 103 104/** 105 * Writes a 32 bit value to the processor local scratchpad memory. 106 * 107 * @address: byte address to write to 108 * @value: value to write 109 */ 110static inline void cvmx_scratch_write16(uint64_t address, uint64_t value) 111{ 112 *CASTPTR(volatile uint16_t, CVMX_SCRATCH_BASE + address) = 113 (uint16_t) value; 114} 115 116/** 117 * Writes a 16 bit value to the processor local scratchpad memory. 118 * 119 * @address: byte address to write to 120 * @value: value to write 121 */ 122static inline void cvmx_scratch_write32(uint64_t address, uint64_t value) 123{ 124 *CASTPTR(volatile uint32_t, CVMX_SCRATCH_BASE + address) = 125 (uint32_t) value; 126} 127 128/** 129 * Writes a 64 bit value to the processor local scratchpad memory. 130 * 131 * @address: byte address to write to 132 * @value: value to write 133 */ 134static inline void cvmx_scratch_write64(uint64_t address, uint64_t value) 135{ 136 *CASTPTR(volatile uint64_t, CVMX_SCRATCH_BASE + address) = value; 137} 138 139#endif /* __CVMX_SCRATCH_H__ */ 140