/***********************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**************************************/
/*
* Interface to the hardware Fetch and Add Unit.
*/
#ifndef __CVMX_FAU_H__
#define __CVMX_FAU_H__
/*
* Octeon Fetch and Add Unit (FAU)
*/
#define CVMX_FAU_LOAD_IO_ADDRESS cvmx_build_io_address(0x1e, 0)
#define CVMX_FAU_BITS_SCRADDR 63, 56
#define CVMX_FAU_BITS_LEN 55, 48
#define CVMX_FAU_BITS_INEVAL 35, 14
#define CVMX_FAU_BITS_TAGWAIT 13, 13
#define CVMX_FAU_BITS_NOADD 13, 13
#define CVMX_FAU_BITS_SIZE 12, 11
#define CVMX_FAU_BITS_REGISTER 10, 0
typedef enum {
CVMX_FAU_OP_SIZE_8 = 0,
CVMX_FAU_OP_SIZE_16 = 1,
CVMX_FAU_OP_SIZE_32 = 2,
CVMX_FAU_OP_SIZE_64 = 3
} cvmx_fau_op_size_t;
/**
* Tagwait return definition. If a timeout occurs, the error
* bit will be set. Otherwise the value of the register before
* the update will be returned.
*/
typedef struct {
uint64_t error:1;
int64_t value:63;
} cvmx_fau_tagwait64_t;
/**
* Tagwait return definition. If a timeout occurs, the error
* bit will be set. Otherwise the value of the register before
* the update will be returned.
*/
typedef struct {
uint64_t error:1;
int32_t value:31;
} cvmx_fau_tagwait32_t;
/**
* Tagwait return definition. If a timeout occurs, the error
* bit will be set. Otherwise the value of the register before
* the update will be returned.
*/
typedef struct {
uint64_t error:1;
int16_t value:15;
} cvmx_fau_tagwait16_t;
/**
* Tagwait return definition. If a timeout occurs, the error
* bit will be set. Otherwise the value of the register before
* the update will be returned.
*/
typedef struct {
uint64_t error:1;
int8_t value:7;
} cvmx_fau_tagwait8_t;
/**
* Asynchronous tagwait return definition. If a timeout occurs,
* the error bit will be set. Otherwise the value of the
* register before the update will be returned.
*/
typedef union {
uint64_t u64;
struct {
uint64_t invalid:1;
uint64_t data:63; /* unpredictable if invalid is set */
} s;
} cvmx_fau_async_tagwait_result_t;
/**
* Builds a store I/O address for writing to the FAU
*
* @noadd: 0 = Store value is atomically added to the current value
* 1 = Store value is atomically written over the current value
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 2 for 16 bit access.
* - Step by 4 for 32 bit access.
* - Step by 8 for 64 bit access.
* Returns Address to store for atomic update
*/
static inline uint64_t __cvmx_fau_store_address(uint64_t noadd, uint64_t reg)
{
return CVMX_ADD_IO_SEG(CVMX_FAU_LOAD_IO_ADDRESS) |
cvmx_build_bits(CVMX_FAU_BITS_NOADD, noadd) |
cvmx_build_bits(CVMX_FAU_BITS_REGISTER, reg);
}
/**
* Builds a I/O address for accessing the FAU
*
* @tagwait: Should the atomic add wait for the current tag switch
* operation to complete.
* - 0 = Don't wait
* - 1 = Wait for tag switch to complete
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 2 for 16 bit access.
* - Step by 4 for 32 bit access.
* - Step by 8 for 64 bit access.
* @value: Signed value to add.
* Note: When performing 32 and 64 bit access, only the low
* 22 bits are available.
* Returns Address to read from for atomic update
*/
static inline uint64_t __cvmx_fau_atomic_address(uint64_t tagwait, uint64_t reg,
int64_t value)
{
return CVMX_ADD_IO_SEG(CVMX_FAU_LOAD_IO_ADDRESS) |
cvmx_build_bits(CVMX_FAU_BITS_INEVAL, value) |
cvmx_build_bits(CVMX_FAU_BITS_TAGWAIT, tagwait) |
cvmx_build_bits(CVMX_FAU_BITS_REGISTER, reg);
}
/**
* Perform an atomic 64 bit add
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 8 for 64 bit access.
* @value: Signed value to add.
* Note: Only the low 22 bits are available.
* Returns Value of the register before the update
*/
static inline int64_t cvmx_fau_fetch_and_add64(cvmx_fau_reg_64_t reg,
int64_t value)
{
return cvmx_read64_int64(__cvmx_fau_atomic_address(0, reg, value));
}
/**
* Perform an atomic 32 bit add
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 4 for 32 bit access.
* @value: Signed value to add.
* Note: Only the low 22 bits are available.
* Returns Value of the register before the update
*/
static inline int32_t cvmx_fau_fetch_and_add32(cvmx_fau_reg_32_t reg,
int32_t value)
{
return cvmx_read64_int32(__cvmx_fau_atomic_address(0, reg, value));
}
/**
* Perform an atomic 16 bit add
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 2 for 16 bit access.
* @value: Signed value to add.
* Returns Value of the register before the update
*/
static inline int16_t cvmx_fau_fetch_and_add16(cvmx_fau_reg_16_t reg,
int16_t value)
{
return cvmx_read64_int16(__cvmx_fau_atomic_address(0, reg, value));
}
/**
* Perform an atomic 8 bit add
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* @value: Signed value to add.
* Returns Value of the register before the update
*/
static inline int8_t cvmx_fau_fetch_and_add8(cvmx_fau_reg_8_t reg, int8_t value)
{
return cvmx_read64_int8(__cvmx_fau_atomic_address(0, reg, value));
}
/**
* Perform an atomic 64 bit add after the current tag switch
* completes
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 8 for 64 bit access.
* @value: Signed value to add.
* Note: Only the low 22 bits are available.
* Returns If a timeout occurs, the error bit will be set. Otherwise
* the value of the register before the update will be
* returned
*/
static inline cvmx_fau_tagwait64_t
cvmx_fau_tagwait_fetch_and_add64(cvmx_fau_reg_64_t reg, int64_t value)
{
union {
uint64_t i64;
cvmx_fau_tagwait64_t t;
} result;
result.i64 =
cvmx_read64_int64(__cvmx_fau_atomic_address(1, reg, value));
return result.t;
}
/**
* Perform an atomic 32 bit add after the current tag switch
* completes
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 4 for 32 bit access.
* @value: Signed value to add.
* Note: Only the low 22 bits are available.
* Returns If a timeout occurs, the error bit will be set. Otherwise
* the value of the register before the update will be
* returned
*/
static inline cvmx_fau_tagwait32_t
cvmx_fau_tagwait_fetch_and_add32(cvmx_fau_reg_32_t reg, int32_t value)
{
union {
uint64_t i32;
cvmx_fau_tagwait32_t t;
} result;
result.i32 =
cvmx_read64_int32(__cvmx_fau_atomic_address(1, reg, value));
return result.t;
}
/**
* Perform an atomic 16 bit add after the current tag switch
* completes
*
* @reg: FAU atomic register to access. 0 <= reg < 2048.
* - Step by 2 for 16 bit access.
* @value: Signed value to add.
* Returns If a timeout occurs, the error bit will be set. Otherwise
* the value of the register before the update will be
* returned
*/
static inline cvmx_fau_tagwait16_t
cvmx
