/***********************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__ */