/***********************license start***************
* Author : Cavium Networks
*
* Contact : support @ caviumnetworks . com
* This file is part of the OCTEON SDK
*
* Copyright ( c ) 2003 - 2017 Cavium , Inc .
*
* 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 Level 2 Cache ( L2C ) control , measurement , and debugging
* facilities .
*/
#ifndef __CVMX_L2C_H__
#define __CVMX_L2C_H__
#include <uapi/asm /bitfield.h>
#define CVMX_L2_ASSOC cvmx_l2c_get_num_assoc() /* Deprecated macro */
#define CVMX_L2_SET_BITS cvmx_l2c_get_set_bits() /* Deprecated macro */
#define CVMX_L2_SETS cvmx_l2c_get_num_sets() /* Deprecated macro */
/* Based on 128 byte cache line size */
#define CVMX_L2C_IDX_ADDR_SHIFT 7
#define CVMX_L2C_IDX_MASK (cvmx_l2c_get_num_sets() - 1 )
/* Defines for index aliasing computations */
#define CVMX_L2C_TAG_ADDR_ALIAS_SHIFT (CVMX_L2C_IDX_ADDR_SHIFT + \
cvmx_l2c_get_set_bits())
#define CVMX_L2C_ALIAS_MASK (CVMX_L2C_IDX_MASK << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT)
#define CVMX_L2C_MEMBANK_SELECT_SIZE 4096
/* Number of L2C Tag-and-data sections (TADs) that are connected to LMC. */
#define CVMX_L2C_TADS 1
union cvmx_l2c_tag {
uint64_t u64;
struct {
__BITFIELD_FIELD(uint64_t reserved:28 ,
__BITFIELD_FIELD(uint64_t V:1 ,
__BITFIELD_FIELD(uint64_t D:1 ,
__BITFIELD_FIELD(uint64_t L:1 ,
__BITFIELD_FIELD(uint64_t U:1 ,
__BITFIELD_FIELD(uint64_t addr:32 ,
;))))))
} s;
};
/* L2C Performance Counter events. */
enum cvmx_l2c_event {
CVMX_L2C_EVENT_CYCLES = 0 ,
CVMX_L2C_EVENT_INSTRUCTION_MISS = 1 ,
CVMX_L2C_EVENT_INSTRUCTION_HIT = 2 ,
CVMX_L2C_EVENT_DATA_MISS = 3 ,
CVMX_L2C_EVENT_DATA_HIT = 4 ,
CVMX_L2C_EVENT_MISS = 5 ,
CVMX_L2C_EVENT_HIT = 6 ,
CVMX_L2C_EVENT_VICTIM_HIT = 7 ,
CVMX_L2C_EVENT_INDEX_CONFLICT = 8 ,
CVMX_L2C_EVENT_TAG_PROBE = 9 ,
CVMX_L2C_EVENT_TAG_UPDATE = 10 ,
CVMX_L2C_EVENT_TAG_COMPLETE = 11 ,
CVMX_L2C_EVENT_TAG_DIRTY = 12 ,
CVMX_L2C_EVENT_DATA_STORE_NOP = 13 ,
CVMX_L2C_EVENT_DATA_STORE_READ = 14 ,
CVMX_L2C_EVENT_DATA_STORE_WRITE = 15 ,
CVMX_L2C_EVENT_FILL_DATA_VALID = 16 ,
CVMX_L2C_EVENT_WRITE_REQUEST = 17 ,
CVMX_L2C_EVENT_READ_REQUEST = 18 ,
CVMX_L2C_EVENT_WRITE_DATA_VALID = 19 ,
CVMX_L2C_EVENT_XMC_NOP = 20 ,
CVMX_L2C_EVENT_XMC_LDT = 21 ,
CVMX_L2C_EVENT_XMC_LDI = 22 ,
CVMX_L2C_EVENT_XMC_LDD = 23 ,
CVMX_L2C_EVENT_XMC_STF = 24 ,
CVMX_L2C_EVENT_XMC_STT = 25 ,
CVMX_L2C_EVENT_XMC_STP = 26 ,
CVMX_L2C_EVENT_XMC_STC = 27 ,
CVMX_L2C_EVENT_XMC_DWB = 28 ,
CVMX_L2C_EVENT_XMC_PL2 = 29 ,
CVMX_L2C_EVENT_XMC_PSL1 = 30 ,
CVMX_L2C_EVENT_XMC_IOBLD = 31 ,
CVMX_L2C_EVENT_XMC_IOBST = 32 ,
CVMX_L2C_EVENT_XMC_IOBDMA = 33 ,
CVMX_L2C_EVENT_XMC_IOBRSP = 34 ,
CVMX_L2C_EVENT_XMC_BUS_VALID = 35 ,
CVMX_L2C_EVENT_XMC_MEM_DATA = 36 ,
CVMX_L2C_EVENT_XMC_REFL_DATA = 37 ,
CVMX_L2C_EVENT_XMC_IOBRSP_DATA = 38 ,
CVMX_L2C_EVENT_RSC_NOP = 39 ,
CVMX_L2C_EVENT_RSC_STDN = 40 ,
CVMX_L2C_EVENT_RSC_FILL = 41 ,
CVMX_L2C_EVENT_RSC_REFL = 42 ,
CVMX_L2C_EVENT_RSC_STIN = 43 ,
CVMX_L2C_EVENT_RSC_SCIN = 44 ,
CVMX_L2C_EVENT_RSC_SCFL = 45 ,
CVMX_L2C_EVENT_RSC_SCDN = 46 ,
CVMX_L2C_EVENT_RSC_DATA_VALID = 47 ,
CVMX_L2C_EVENT_RSC_VALID_FILL = 48 ,
CVMX_L2C_EVENT_RSC_VALID_STRSP = 49 ,
CVMX_L2C_EVENT_RSC_VALID_REFL = 50 ,
CVMX_L2C_EVENT_LRF_REQ = 51 ,
CVMX_L2C_EVENT_DT_RD_ALLOC = 52 ,
CVMX_L2C_EVENT_DT_WR_INVAL = 53 ,
CVMX_L2C_EVENT_MAX
};
/* L2C Performance Counter events for Octeon2. */
enum cvmx_l2c_tad_event {
CVMX_L2C_TAD_EVENT_NONE = 0 ,
CVMX_L2C_TAD_EVENT_TAG_HIT = 1 ,
CVMX_L2C_TAD_EVENT_TAG_MISS = 2 ,
CVMX_L2C_TAD_EVENT_TAG_NOALLOC = 3 ,
CVMX_L2C_TAD_EVENT_TAG_VICTIM = 4 ,
CVMX_L2C_TAD_EVENT_SC_FAIL = 5 ,
CVMX_L2C_TAD_EVENT_SC_PASS = 6 ,
CVMX_L2C_TAD_EVENT_LFB_VALID = 7 ,
CVMX_L2C_TAD_EVENT_LFB_WAIT_LFB = 8 ,
CVMX_L2C_TAD_EVENT_LFB_WAIT_VAB = 9 ,
CVMX_L2C_TAD_EVENT_QUAD0_INDEX = 128 ,
CVMX_L2C_TAD_EVENT_QUAD0_READ = 129 ,
CVMX_L2C_TAD_EVENT_QUAD0_BANK = 130 ,
CVMX_L2C_TAD_EVENT_QUAD0_WDAT = 131 ,
CVMX_L2C_TAD_EVENT_QUAD1_INDEX = 144 ,
CVMX_L2C_TAD_EVENT_QUAD1_READ = 145 ,
CVMX_L2C_TAD_EVENT_QUAD1_BANK = 146 ,
CVMX_L2C_TAD_EVENT_QUAD1_WDAT = 147 ,
CVMX_L2C_TAD_EVENT_QUAD2_INDEX = 160 ,
CVMX_L2C_TAD_EVENT_QUAD2_READ = 161 ,
CVMX_L2C_TAD_EVENT_QUAD2_BANK = 162 ,
CVMX_L2C_TAD_EVENT_QUAD2_WDAT = 163 ,
CVMX_L2C_TAD_EVENT_QUAD3_INDEX = 176 ,
CVMX_L2C_TAD_EVENT_QUAD3_READ = 177 ,
CVMX_L2C_TAD_EVENT_QUAD3_BANK = 178 ,
CVMX_L2C_TAD_EVENT_QUAD3_WDAT = 179 ,
CVMX_L2C_TAD_EVENT_MAX
};
/**
* Configure one of the four L2 Cache performance counters to capture event
* occurrences .
*
* @ counter : The counter to configure . Range 0 . . 3 .
* @ event : The type of L2 Cache event occurrence to count .
* @ clear_on_read : When asserted , any read of the performance counter
* clears the counter .
*
* @ note The routine does not clear the counter .
*/
void cvmx_l2c_config_perf(uint32_t counter, enum cvmx_l2c_event event,
uint32_t clear_on_read);
/**
* Read the given L2 Cache performance counter . The counter must be configured
* before reading , but this routine does not enforce this requirement .
*
* @ counter : The counter to configure . Range 0 . . 3 .
*
* Returns The current counter value .
*/
uint64_t cvmx_l2c_read_perf(uint32_t counter);
/**
* Return the L2 Cache way partitioning for a given core .
*
* @ core : The core processor of interest .
*
* Returns The mask specifying the partitioning . 0 bits in mask indicates
* the cache ' ways ' that a core can evict from .
* - 1 on error
*/
int cvmx_l2c_get_core_way_partition(uint32_t core);
/**
* Partitions the L2 cache for a core
*
* @ core : The core that the partitioning applies to .
* @ mask : The partitioning of the ways expressed as a binary
* mask . A 0 bit allows the core to evict cache lines from
* a way , while a 1 bit blocks the core from evicting any
* lines from that way . There must be at least one allowed
* way ( 0 bit ) in the mask .
*
* @ note If any ways are blocked for all cores and the HW blocks , then
* those ways will never have any cache lines evicted from them .
* All cores and the hardware blocks are free to read from all
* ways regardless of the partitioning .
*/
int cvmx_l2c_set_core_way_partition(uint32_t core, uint32_t mask);
/**
* Return the L2 Cache way partitioning for the hw blocks .
*
* Returns The mask specifying the reserved way . 0 bits in mask indicates
* the cache ' ways ' that a core can evict from .
* - 1 on error
*/
int cvmx_l2c_get_hw_way_partition(void );
/**
* Partitions the L2 cache for the hardware blocks .
*
* @ mask : The partitioning of the ways expressed as a binary
* mask . A 0 bit allows the core to evict cache lines from
* a way , while a 1 bit blocks the core from evicting any
* lines from that way . There must be at least one allowed
* way ( 0 bit ) in the mask .
*
* @ note If any ways are blocked for all cores and the HW blocks , then
* those ways will never have any cache lines evicted from them .
* All cores and the hardware blocks are free to read from all
* ways regardless of the partitioning .
*/
int cvmx_l2c_set_hw_way_partition(uint32_t mask);
/**
* Locks a line in the L2 cache at the specified physical address
*
* @ addr : physical address of line to lock
*
* Returns 0 on success ,
* 1 if line not locked .
*/
int cvmx_l2c_lock_line(uint64_t addr);
/**
* Locks a specified memory region in the L2 cache .
*
* Note that if not all lines can be locked , that means that all
* but one of the ways ( associations ) available to the locking
* core are locked . Having only 1 association available for
* normal caching may have a significant adverse affect on performance .
* Care should be taken to ensure that enough of the L2 cache is left
* unlocked to allow for normal caching of DRAM .
*
* @ start : Physical address of the start of the region to lock
* @ len : Length ( in bytes ) of region to lock
*
* Returns Number of requested lines that where not locked .
* 0 on success ( all locked )
*/
int cvmx_l2c_lock_mem_region(uint64_t start, uint64_t len);
/**
* Unlock and flush a cache line from the L2 cache .
* IMPORTANT : Must only be run by one core at a time due to use
* of L2C debug features .
* Note that this function will flush a matching but unlocked cache line .
* ( If address is not in L2 , no lines are flushed . )
*
* @ address : Physical address to unlock
*
* Returns 0 : line not unlocked
* 1 : line unlocked
*/
int cvmx_l2c_unlock_line(uint64_t address);
/**
* Unlocks a region of memory that is locked in the L2 cache
*
* @ start : start physical address
* @ len : length ( in bytes ) to unlock
*
* Returns Number of locked lines that the call unlocked
*/
int cvmx_l2c_unlock_mem_region(uint64_t start, uint64_t len);
/**
* Read the L2 controller tag for a given location in L2
*
* @ association :
* Which association to read line from
* @ index : Which way to read from .
*
* Returns l2c tag structure for line requested .
*/
union cvmx_l2c_tag cvmx_l2c_get_tag(uint32_t association, uint32_t index);
/* Wrapper providing a deprecated old function name */
static inline union cvmx_l2c_tag cvmx_get_l2c_tag(uint32_t association,
uint32_t index)
__attribute__((deprecated));
static inline union cvmx_l2c_tag cvmx_get_l2c_tag(uint32_t association,
uint32_t index)
{
return cvmx_l2c_get_tag(association, index);
}
/**
* Returns the cache index for a given physical address
*
* @ addr : physical address
*
* Returns L2 cache index
*/
uint32_t cvmx_l2c_address_to_index(uint64_t addr);
/**
* Flushes ( and unlocks ) the entire L2 cache .
* IMPORTANT : Must only be run by one core at a time due to use
* of L2C debug features .
*/
void cvmx_l2c_flush(void );
/**
*
* Returns the size of the L2 cache in bytes ,
* - 1 on error ( unrecognized model )
*/
int cvmx_l2c_get_cache_size_bytes(void );
/**
* Return the number of sets in the L2 Cache
*
* Returns
*/
int cvmx_l2c_get_num_sets(void );
/**
* Return log base 2 of the number of sets in the L2 cache
* Returns
*/
int cvmx_l2c_get_set_bits(void );
/**
* Return the number of associations in the L2 Cache
*
* Returns
*/
int cvmx_l2c_get_num_assoc(void );
/**
* Flush a line from the L2 cache
* This should only be called from one core at a time , as this routine
* sets the core to the ' debug ' core in order to flush the line .
*
* @ assoc : Association ( or way ) to flush
* @ index : Index to flush
*/
void cvmx_l2c_flush_line(uint32_t assoc, uint32_t index);
#endif /* __CVMX_L2C_H__ */
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