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47 * Interface to the Level 2 Cache (L2C) control, measurement, and debugging
50 * <hr>$Revision: 41586 $<hr>
54 #ifndef __CVMX_L2C_H__
55 #define __CVMX_L2C_H__
57 #define CVMX_L2_ASSOC cvmx_l2c_get_num_assoc() /* Deprecated macro, use function */
58 #define CVMX_L2_SET_BITS cvmx_l2c_get_set_bits() /* Deprecated macro, use function */
59 #define CVMX_L2_SETS cvmx_l2c_get_num_sets() /* Deprecated macro, use function */
62 #define CVMX_L2C_IDX_ADDR_SHIFT 7 /* based on 128 byte cache line size */
63 #define CVMX_L2C_IDX_MASK (cvmx_l2c_get_num_sets() - 1)
65 /* Defines for index aliasing computations */
66 #define CVMX_L2C_TAG_ADDR_ALIAS_SHIFT (CVMX_L2C_IDX_ADDR_SHIFT + cvmx_l2c_get_set_bits())
67 #define CVMX_L2C_ALIAS_MASK (CVMX_L2C_IDX_MASK << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT)
73 typedef union { // L2C Tag/Data Store Debug Register
76 uint64_t reserved: 32,
90 #if __BYTE_ORDER == __BIG_ENDIAN
93 uint64_t reserved : 28;
94 uint64_t V : 1; // Line valid
95 uint64_t D : 1; // Line dirty
96 uint64_t L : 1; // Line locked
97 uint64_t U : 1; // Use, LRU eviction
98 uint64_t addr : 32; // Phys mem (not all bits valid)
104 /* L2C Performance Counter events. */
107 CVMX_L2C_EVENT_CYCLES = 0,
108 CVMX_L2C_EVENT_INSTRUCTION_MISS = 1,
109 CVMX_L2C_EVENT_INSTRUCTION_HIT = 2,
110 CVMX_L2C_EVENT_DATA_MISS = 3,
111 CVMX_L2C_EVENT_DATA_HIT = 4,
112 CVMX_L2C_EVENT_MISS = 5,
113 CVMX_L2C_EVENT_HIT = 6,
114 CVMX_L2C_EVENT_VICTIM_HIT = 7,
115 CVMX_L2C_EVENT_INDEX_CONFLICT = 8,
116 CVMX_L2C_EVENT_TAG_PROBE = 9,
117 CVMX_L2C_EVENT_TAG_UPDATE = 10,
118 CVMX_L2C_EVENT_TAG_COMPLETE = 11,
119 CVMX_L2C_EVENT_TAG_DIRTY = 12,
120 CVMX_L2C_EVENT_DATA_STORE_NOP = 13,
121 CVMX_L2C_EVENT_DATA_STORE_READ = 14,
122 CVMX_L2C_EVENT_DATA_STORE_WRITE = 15,
123 CVMX_L2C_EVENT_FILL_DATA_VALID = 16,
124 CVMX_L2C_EVENT_WRITE_REQUEST = 17,
125 CVMX_L2C_EVENT_READ_REQUEST = 18,
126 CVMX_L2C_EVENT_WRITE_DATA_VALID = 19,
127 CVMX_L2C_EVENT_XMC_NOP = 20,
128 CVMX_L2C_EVENT_XMC_LDT = 21,
129 CVMX_L2C_EVENT_XMC_LDI = 22,
130 CVMX_L2C_EVENT_XMC_LDD = 23,
131 CVMX_L2C_EVENT_XMC_STF = 24,
132 CVMX_L2C_EVENT_XMC_STT = 25,
133 CVMX_L2C_EVENT_XMC_STP = 26,
134 CVMX_L2C_EVENT_XMC_STC = 27,
135 CVMX_L2C_EVENT_XMC_DWB = 28,
136 CVMX_L2C_EVENT_XMC_PL2 = 29,
137 CVMX_L2C_EVENT_XMC_PSL1 = 30,
138 CVMX_L2C_EVENT_XMC_IOBLD = 31,
139 CVMX_L2C_EVENT_XMC_IOBST = 32,
140 CVMX_L2C_EVENT_XMC_IOBDMA = 33,
141 CVMX_L2C_EVENT_XMC_IOBRSP = 34,
142 CVMX_L2C_EVENT_XMC_BUS_VALID = 35,
143 CVMX_L2C_EVENT_XMC_MEM_DATA = 36,
144 CVMX_L2C_EVENT_XMC_REFL_DATA = 37,
145 CVMX_L2C_EVENT_XMC_IOBRSP_DATA = 38,
146 CVMX_L2C_EVENT_RSC_NOP = 39,
147 CVMX_L2C_EVENT_RSC_STDN = 40,
148 CVMX_L2C_EVENT_RSC_FILL = 41,
149 CVMX_L2C_EVENT_RSC_REFL = 42,
150 CVMX_L2C_EVENT_RSC_STIN = 43,
151 CVMX_L2C_EVENT_RSC_SCIN = 44,
152 CVMX_L2C_EVENT_RSC_SCFL = 45,
153 CVMX_L2C_EVENT_RSC_SCDN = 46,
154 CVMX_L2C_EVENT_RSC_DATA_VALID = 47,
155 CVMX_L2C_EVENT_RSC_VALID_FILL = 48,
156 CVMX_L2C_EVENT_RSC_VALID_STRSP = 49,
157 CVMX_L2C_EVENT_RSC_VALID_REFL = 50,
158 CVMX_L2C_EVENT_LRF_REQ = 51,
159 CVMX_L2C_EVENT_DT_RD_ALLOC = 52,
160 CVMX_L2C_EVENT_DT_WR_INVAL = 53
164 * Configure one of the four L2 Cache performance counters to capture event
167 * @param counter The counter to configure. Range 0..3.
168 * @param event The type of L2 Cache event occurrence to count.
169 * @param clear_on_read When asserted, any read of the performance counter
170 * clears the counter.
172 * @note The routine does not clear the counter.
174 void cvmx_l2c_config_perf(uint32_t counter,
175 cvmx_l2c_event_t event,
176 uint32_t clear_on_read);
178 * Read the given L2 Cache performance counter. The counter must be configured
179 * before reading, but this routine does not enforce this requirement.
181 * @param counter The counter to configure. Range 0..3.
183 * @return The current counter value.
185 uint64_t cvmx_l2c_read_perf(uint32_t counter);
188 * Return the L2 Cache way partitioning for a given core.
190 * @param core The core processor of interest.
192 * @return The mask specifying the partitioning. 0 bits in mask indicates
193 * the cache 'ways' that a core can evict from.
196 int cvmx_l2c_get_core_way_partition(uint32_t core);
199 * Partitions the L2 cache for a core
201 * @param core The core that the partitioning applies to.
202 * @param mask The partitioning of the ways expressed as a binary mask. A 0 bit allows the core
203 * to evict cache lines from a way, while a 1 bit blocks the core from evicting any lines
204 * from that way. There must be at least one allowed way (0 bit) in the mask.
206 * @note If any ways are blocked for all cores and the HW blocks, then those ways will never have
207 * any cache lines evicted from them. All cores and the hardware blocks are free to read from
208 * all ways regardless of the partitioning.
210 int cvmx_l2c_set_core_way_partition(uint32_t core, uint32_t mask);
213 * Return the L2 Cache way partitioning for the hw blocks.
215 * @return The mask specifying the reserved way. 0 bits in mask indicates
216 * the cache 'ways' that a core can evict from.
219 int cvmx_l2c_get_hw_way_partition(void);
222 * Partitions the L2 cache for the hardware blocks.
224 * @param mask The partitioning of the ways expressed as a binary mask. A 0 bit allows the core
225 * to evict cache lines from a way, while a 1 bit blocks the core from evicting any lines
226 * from that way. There must be at least one allowed way (0 bit) in the mask.
228 * @note If any ways are blocked for all cores and the HW blocks, then those ways will never have
229 * any cache lines evicted from them. All cores and the hardware blocks are free to read from
230 * all ways regardless of the partitioning.
232 int cvmx_l2c_set_hw_way_partition(uint32_t mask);
236 * Locks a line in the L2 cache at the specified physical address
238 * @param addr physical address of line to lock
240 * @return 0 on success,
241 * 1 if line not locked.
243 int cvmx_l2c_lock_line(uint64_t addr);
246 * Locks a specified memory region in the L2 cache.
248 * Note that if not all lines can be locked, that means that all
249 * but one of the ways (associations) available to the locking
250 * core are locked. Having only 1 association available for
251 * normal caching may have a significant adverse affect on performance.
252 * Care should be taken to ensure that enough of the L2 cache is left
253 * unlocked to allow for normal caching of DRAM.
255 * @param start Physical address of the start of the region to lock
256 * @param len Length (in bytes) of region to lock
258 * @return Number of requested lines that where not locked.
259 * 0 on success (all locked)
261 int cvmx_l2c_lock_mem_region(uint64_t start, uint64_t len);
265 * Unlock and flush a cache line from the L2 cache.
266 * IMPORTANT: Must only be run by one core at a time due to use
267 * of L2C debug features.
268 * Note that this function will flush a matching but unlocked cache line.
269 * (If address is not in L2, no lines are flushed.)
271 * @param address Physical address to unlock
273 * @return 0: line not unlocked
276 int cvmx_l2c_unlock_line(uint64_t address);
279 * Unlocks a region of memory that is locked in the L2 cache
281 * @param start start physical address
282 * @param len length (in bytes) to unlock
284 * @return Number of locked lines that the call unlocked
286 int cvmx_l2c_unlock_mem_region(uint64_t start, uint64_t len);
292 * Read the L2 controller tag for a given location in L2
295 * Which association to read line from
296 * @param index Which way to read from.
298 * @return l2c tag structure for line requested.
300 cvmx_l2c_tag_t cvmx_l2c_get_tag(uint32_t association, uint32_t index);
302 /* Wrapper around deprecated old function name */
303 static inline cvmx_l2c_tag_t cvmx_get_l2c_tag(uint32_t association, uint32_t index)
305 return cvmx_l2c_get_tag(association, index);
310 * Returns the cache index for a given physical address
312 * @param addr physical address
314 * @return L2 cache index
316 uint32_t cvmx_l2c_address_to_index (uint64_t addr);
320 * Flushes (and unlocks) the entire L2 cache.
321 * IMPORTANT: Must only be run by one core at a time due to use
322 * of L2C debug features.
324 void cvmx_l2c_flush(void);
330 * @return Returns the size of the L2 cache in bytes,
331 * -1 on error (unrecognized model)
333 int cvmx_l2c_get_cache_size_bytes(void);
336 * Return the number of sets in the L2 Cache
340 int cvmx_l2c_get_num_sets(void);
343 * Return log base 2 of the number of sets in the L2 cache
346 int cvmx_l2c_get_set_bits(void);
348 * Return the number of associations in the L2 Cache
352 int cvmx_l2c_get_num_assoc(void);
355 * Flush a line from the L2 cache
356 * This should only be called from one core at a time, as this routine
357 * sets the core to the 'debug' core in order to flush the line.
359 * @param assoc Association (or way) to flush
360 * @param index Index to flush
362 void cvmx_l2c_flush_line(uint32_t assoc, uint32_t index);
364 #endif /* __CVMX_L2C_H__ */