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49 * Interface to the Level 2 Cache (L2C) control, measurement, and debugging
52 * <hr>$Revision: 52004 $<hr>
56 #ifndef __CVMX_L2C_H__
57 #define __CVMX_L2C_H__
59 #define CVMX_L2_ASSOC cvmx_l2c_get_num_assoc() /* Deprecated macro, use function */
60 #define CVMX_L2_SET_BITS cvmx_l2c_get_set_bits() /* Deprecated macro, use function */
61 #define CVMX_L2_SETS cvmx_l2c_get_num_sets() /* Deprecated macro, use function */
64 #define CVMX_L2C_IDX_ADDR_SHIFT 7 /* based on 128 byte cache line size */
65 #define CVMX_L2C_IDX_MASK (cvmx_l2c_get_num_sets() - 1)
67 /* Defines for index aliasing computations */
68 #define CVMX_L2C_TAG_ADDR_ALIAS_SHIFT (CVMX_L2C_IDX_ADDR_SHIFT + cvmx_l2c_get_set_bits())
69 #define CVMX_L2C_ALIAS_MASK (CVMX_L2C_IDX_MASK << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT)
70 #define CVMX_L2C_MEMBANK_SELECT_SIZE 4096
72 /* Defines for Virtualizations, valid only from Octeon II onwards. */
73 #define CVMX_L2C_VRT_MAX_VIRTID_ALLOWED ((OCTEON_IS_MODEL(OCTEON_CN63XX)) ? 64 : 0)
74 #define CVMX_L2C_VRT_MAX_MEMSZ_ALLOWED ((OCTEON_IS_MODEL(OCTEON_CN63XX)) ? 32 : 0)
83 #if __BYTE_ORDER == __BIG_ENDIAN
86 uint64_t reserved : 28;
87 uint64_t V : 1; // Line valid
88 uint64_t D : 1; // Line dirty
89 uint64_t L : 1; // Line locked
90 uint64_t U : 1; // Use, LRU eviction
91 uint64_t addr : 32; // Phys mem (not all bits valid)
96 /* Number of L2C Tag-and-data sections (TADs) that are connected to LMC. */
97 #define CVMX_L2C_TADS 1
99 /* L2C Performance Counter events. */
102 CVMX_L2C_EVENT_CYCLES = 0, /**< Cycles */
103 CVMX_L2C_EVENT_INSTRUCTION_MISS = 1, /**< L2 Instruction Miss */
104 CVMX_L2C_EVENT_INSTRUCTION_HIT = 2, /**< L2 Instruction Hit */
105 CVMX_L2C_EVENT_DATA_MISS = 3, /**< L2 Data Miss */
106 CVMX_L2C_EVENT_DATA_HIT = 4, /**< L2 Data Hit */
107 CVMX_L2C_EVENT_MISS = 5, /**< L2 Miss (I/D) */
108 CVMX_L2C_EVENT_HIT = 6, /**< L2 Hit (I/D) */
109 CVMX_L2C_EVENT_VICTIM_HIT = 7, /**< L2 Victim Buffer Hit (Retry Probe) */
110 CVMX_L2C_EVENT_INDEX_CONFLICT = 8, /**< LFB-NQ Index Conflict */
111 CVMX_L2C_EVENT_TAG_PROBE = 9, /**< L2 Tag Probe (issued - could be VB-Retried) */
112 CVMX_L2C_EVENT_TAG_UPDATE = 10, /**< L2 Tag Update (completed). Note: Some CMD types do not update */
113 CVMX_L2C_EVENT_TAG_COMPLETE = 11, /**< L2 Tag Probe Completed (beyond VB-RTY window) */
114 CVMX_L2C_EVENT_TAG_DIRTY = 12, /**< L2 Tag Dirty Victim */
115 CVMX_L2C_EVENT_DATA_STORE_NOP = 13, /**< L2 Data Store NOP */
116 CVMX_L2C_EVENT_DATA_STORE_READ = 14, /**< L2 Data Store READ */
117 CVMX_L2C_EVENT_DATA_STORE_WRITE = 15, /**< L2 Data Store WRITE */
118 CVMX_L2C_EVENT_FILL_DATA_VALID = 16, /**< Memory Fill Data valid */
119 CVMX_L2C_EVENT_WRITE_REQUEST = 17, /**< Memory Write Request */
120 CVMX_L2C_EVENT_READ_REQUEST = 18, /**< Memory Read Request */
121 CVMX_L2C_EVENT_WRITE_DATA_VALID = 19, /**< Memory Write Data valid */
122 CVMX_L2C_EVENT_XMC_NOP = 20, /**< XMC NOP */
123 CVMX_L2C_EVENT_XMC_LDT = 21, /**< XMC LDT */
124 CVMX_L2C_EVENT_XMC_LDI = 22, /**< XMC LDI */
125 CVMX_L2C_EVENT_XMC_LDD = 23, /**< XMC LDD */
126 CVMX_L2C_EVENT_XMC_STF = 24, /**< XMC STF */
127 CVMX_L2C_EVENT_XMC_STT = 25, /**< XMC STT */
128 CVMX_L2C_EVENT_XMC_STP = 26, /**< XMC STP */
129 CVMX_L2C_EVENT_XMC_STC = 27, /**< XMC STC */
130 CVMX_L2C_EVENT_XMC_DWB = 28, /**< XMC DWB */
131 CVMX_L2C_EVENT_XMC_PL2 = 29, /**< XMC PL2 */
132 CVMX_L2C_EVENT_XMC_PSL1 = 30, /**< XMC PSL1 */
133 CVMX_L2C_EVENT_XMC_IOBLD = 31, /**< XMC IOBLD */
134 CVMX_L2C_EVENT_XMC_IOBST = 32, /**< XMC IOBST */
135 CVMX_L2C_EVENT_XMC_IOBDMA = 33, /**< XMC IOBDMA */
136 CVMX_L2C_EVENT_XMC_IOBRSP = 34, /**< XMC IOBRSP */
137 CVMX_L2C_EVENT_XMC_BUS_VALID = 35, /**< XMC Bus valid (all) */
138 CVMX_L2C_EVENT_XMC_MEM_DATA = 36, /**< XMC Bus valid (DST=L2C) Memory */
139 CVMX_L2C_EVENT_XMC_REFL_DATA = 37, /**< XMC Bus valid (DST=IOB) REFL Data */
140 CVMX_L2C_EVENT_XMC_IOBRSP_DATA = 38, /**< XMC Bus valid (DST=PP) IOBRSP Data */
141 CVMX_L2C_EVENT_RSC_NOP = 39, /**< RSC NOP */
142 CVMX_L2C_EVENT_RSC_STDN = 40, /**< RSC STDN */
143 CVMX_L2C_EVENT_RSC_FILL = 41, /**< RSC FILL */
144 CVMX_L2C_EVENT_RSC_REFL = 42, /**< RSC REFL */
145 CVMX_L2C_EVENT_RSC_STIN = 43, /**< RSC STIN */
146 CVMX_L2C_EVENT_RSC_SCIN = 44, /**< RSC SCIN */
147 CVMX_L2C_EVENT_RSC_SCFL = 45, /**< RSC SCFL */
148 CVMX_L2C_EVENT_RSC_SCDN = 46, /**< RSC SCDN */
149 CVMX_L2C_EVENT_RSC_DATA_VALID = 47, /**< RSC Data Valid */
150 CVMX_L2C_EVENT_RSC_VALID_FILL = 48, /**< RSC Data Valid (FILL) */
151 CVMX_L2C_EVENT_RSC_VALID_STRSP = 49, /**< RSC Data Valid (STRSP) */
152 CVMX_L2C_EVENT_RSC_VALID_REFL = 50, /**< RSC Data Valid (REFL) */
153 CVMX_L2C_EVENT_LRF_REQ = 51, /**< LRF-REQ (LFB-NQ) */
154 CVMX_L2C_EVENT_DT_RD_ALLOC = 52, /**< DT RD-ALLOC */
155 CVMX_L2C_EVENT_DT_WR_INVAL = 53, /**< DT WR-INVAL */
159 /* L2C Performance Counter events for Octeon2. */
162 CVMX_L2C_TAD_EVENT_NONE = 0, /* None */
163 CVMX_L2C_TAD_EVENT_TAG_HIT = 1, /* L2 Tag Hit */
164 CVMX_L2C_TAD_EVENT_TAG_MISS = 2, /* L2 Tag Miss */
165 CVMX_L2C_TAD_EVENT_TAG_NOALLOC = 3, /* L2 Tag NoAlloc (forced no-allocate) */
166 CVMX_L2C_TAD_EVENT_TAG_VICTIM = 4, /* L2 Tag Victim */
167 CVMX_L2C_TAD_EVENT_SC_FAIL = 5, /* SC Fail */
168 CVMX_L2C_TAD_EVENT_SC_PASS = 6, /* SC Pass */
169 CVMX_L2C_TAD_EVENT_LFB_VALID = 7, /* LFB Occupancy (each cycle adds \# of LFBs valid) */
170 CVMX_L2C_TAD_EVENT_LFB_WAIT_LFB = 8, /* LFB Wait LFB (each cycle adds \# LFBs waiting for other LFBs) */
171 CVMX_L2C_TAD_EVENT_LFB_WAIT_VAB = 9, /* LFB Wait VAB (each cycle adds \# LFBs waiting for VAB) */
172 CVMX_L2C_TAD_EVENT_QUAD0_INDEX = 128, /* Quad 0 index bus inuse */
173 CVMX_L2C_TAD_EVENT_QUAD0_READ = 129, /* Quad 0 read data bus inuse */
174 CVMX_L2C_TAD_EVENT_QUAD0_BANK = 130, /* Quad 0 \# banks inuse (0-4/cycle) */
175 CVMX_L2C_TAD_EVENT_QUAD0_WDAT = 131, /* Quad 0 wdat flops inuse (0-4/cycle) */
176 CVMX_L2C_TAD_EVENT_QUAD1_INDEX = 144, /* Quad 1 index bus inuse */
177 CVMX_L2C_TAD_EVENT_QUAD1_READ = 145, /* Quad 1 read data bus inuse */
178 CVMX_L2C_TAD_EVENT_QUAD1_BANK = 146, /* Quad 1 \# banks inuse (0-4/cycle) */
179 CVMX_L2C_TAD_EVENT_QUAD1_WDAT = 147, /* Quad 1 wdat flops inuse (0-4/cycle) */
180 CVMX_L2C_TAD_EVENT_QUAD2_INDEX = 160, /* Quad 2 index bus inuse */
181 CVMX_L2C_TAD_EVENT_QUAD2_READ = 161, /* Quad 2 read data bus inuse */
182 CVMX_L2C_TAD_EVENT_QUAD2_BANK = 162, /* Quad 2 \# banks inuse (0-4/cycle) */
183 CVMX_L2C_TAD_EVENT_QUAD2_WDAT = 163, /* Quad 2 wdat flops inuse (0-4/cycle) */
184 CVMX_L2C_TAD_EVENT_QUAD3_INDEX = 176, /* Quad 3 index bus inuse */
185 CVMX_L2C_TAD_EVENT_QUAD3_READ = 177, /* Quad 3 read data bus inuse */
186 CVMX_L2C_TAD_EVENT_QUAD3_BANK = 178, /* Quad 3 \# banks inuse (0-4/cycle) */
187 CVMX_L2C_TAD_EVENT_QUAD3_WDAT = 179, /* Quad 3 wdat flops inuse (0-4/cycle) */
188 CVMX_L2C_TAD_EVENT_MAX
189 } cvmx_l2c_tad_event_t;
192 * Configure one of the four L2 Cache performance counters to capture event
195 * @param counter The counter to configure. Range 0..3.
196 * @param event The type of L2 Cache event occurrence to count.
197 * @param clear_on_read When asserted, any read of the performance counter
198 * clears the counter.
200 * @note The routine does not clear the counter.
202 void cvmx_l2c_config_perf(uint32_t counter, cvmx_l2c_event_t event, uint32_t clear_on_read);
205 * Read the given L2 Cache performance counter. The counter must be configured
206 * before reading, but this routine does not enforce this requirement.
208 * @param counter The counter to configure. Range 0..3.
210 * @return The current counter value.
212 uint64_t cvmx_l2c_read_perf(uint32_t counter);
215 * Return the L2 Cache way partitioning for a given core.
217 * @param core The core processor of interest.
219 * @return The mask specifying the partitioning. 0 bits in mask indicates
220 * the cache 'ways' that a core can evict from.
223 int cvmx_l2c_get_core_way_partition(uint32_t core);
226 * Partitions the L2 cache for a core
228 * @param core The core that the partitioning applies to.
229 * @param mask The partitioning of the ways expressed as a binary mask. A 0 bit allows the core
230 * to evict cache lines from a way, while a 1 bit blocks the core from evicting any lines
231 * from that way. There must be at least one allowed way (0 bit) in the mask.
233 * @note If any ways are blocked for all cores and the HW blocks, then those ways will never have
234 * any cache lines evicted from them. All cores and the hardware blocks are free to read from
235 * all ways regardless of the partitioning.
237 int cvmx_l2c_set_core_way_partition(uint32_t core, uint32_t mask);
240 * Return the L2 Cache way partitioning for the hw blocks.
242 * @return The mask specifying the reserved way. 0 bits in mask indicates
243 * the cache 'ways' that a core can evict from.
246 int cvmx_l2c_get_hw_way_partition(void);
249 * Partitions the L2 cache for the hardware blocks.
251 * @param mask The partitioning of the ways expressed as a binary mask. A 0 bit allows the core
252 * to evict cache lines from a way, while a 1 bit blocks the core from evicting any lines
253 * from that way. There must be at least one allowed way (0 bit) in the mask.
255 * @note If any ways are blocked for all cores and the HW blocks, then those ways will never have
256 * any cache lines evicted from them. All cores and the hardware blocks are free to read from
257 * all ways regardless of the partitioning.
259 int cvmx_l2c_set_hw_way_partition(uint32_t mask);
263 * Locks a line in the L2 cache at the specified physical address
265 * @param addr physical address of line to lock
267 * @return 0 on success,
268 * 1 if line not locked.
270 int cvmx_l2c_lock_line(uint64_t addr);
273 * Locks a specified memory region in the L2 cache.
275 * Note that if not all lines can be locked, that means that all
276 * but one of the ways (associations) available to the locking
277 * core are locked. Having only 1 association available for
278 * normal caching may have a significant adverse affect on performance.
279 * Care should be taken to ensure that enough of the L2 cache is left
280 * unlocked to allow for normal caching of DRAM.
282 * @param start Physical address of the start of the region to lock
283 * @param len Length (in bytes) of region to lock
285 * @return Number of requested lines that where not locked.
286 * 0 on success (all locked)
288 int cvmx_l2c_lock_mem_region(uint64_t start, uint64_t len);
292 * Unlock and flush a cache line from the L2 cache.
293 * IMPORTANT: Must only be run by one core at a time due to use
294 * of L2C debug features.
295 * Note that this function will flush a matching but unlocked cache line.
296 * (If address is not in L2, no lines are flushed.)
298 * @param address Physical address to unlock
300 * @return 0: line not unlocked
303 int cvmx_l2c_unlock_line(uint64_t address);
306 * Unlocks a region of memory that is locked in the L2 cache
308 * @param start start physical address
309 * @param len length (in bytes) to unlock
311 * @return Number of locked lines that the call unlocked
313 int cvmx_l2c_unlock_mem_region(uint64_t start, uint64_t len);
319 * Read the L2 controller tag for a given location in L2
322 * Which association to read line from
323 * @param index Which way to read from.
325 * @return l2c tag structure for line requested.
327 cvmx_l2c_tag_t cvmx_l2c_get_tag(uint32_t association, uint32_t index);
329 /* Wrapper providing a deprecated old function name */
330 static inline cvmx_l2c_tag_t cvmx_get_l2c_tag(uint32_t association, uint32_t index) __attribute__((deprecated));
331 static inline cvmx_l2c_tag_t cvmx_get_l2c_tag(uint32_t association, uint32_t index)
333 return cvmx_l2c_get_tag(association, index);
338 * Returns the cache index for a given physical address
340 * @param addr physical address
342 * @return L2 cache index
344 uint32_t cvmx_l2c_address_to_index (uint64_t addr);
348 * Flushes (and unlocks) the entire L2 cache.
349 * IMPORTANT: Must only be run by one core at a time due to use
350 * of L2C debug features.
352 void cvmx_l2c_flush(void);
358 * @return Returns the size of the L2 cache in bytes,
359 * -1 on error (unrecognized model)
361 int cvmx_l2c_get_cache_size_bytes(void);
364 * Return the number of sets in the L2 Cache
368 int cvmx_l2c_get_num_sets(void);
371 * Return log base 2 of the number of sets in the L2 cache
374 int cvmx_l2c_get_set_bits(void);
376 * Return the number of associations in the L2 Cache
380 int cvmx_l2c_get_num_assoc(void);
383 * Flush a line from the L2 cache
384 * This should only be called from one core at a time, as this routine
385 * sets the core to the 'debug' core in order to flush the line.
387 * @param assoc Association (or way) to flush
388 * @param index Index to flush
390 void cvmx_l2c_flush_line(uint32_t assoc, uint32_t index);
393 * Set maxium number of Virtual IDS allowed in a machine.
395 * @param nvid Number of virtial ids allowed in a machine.
396 * @return Return 0 on success or -1 on failure.
398 int cvmx_l2c_vrt_set_max_virtids(int nvid);
401 * Get maxium number of virtual IDs allowed in a machine.
403 * @return Return number of virtual machine IDs. Return -1 on failure.
405 int cvmx_l2c_vrt_get_max_virtids(void);
408 * Set the maxium size of memory space to be allocated for virtualization.
410 * @param memsz Size of the virtual memory in GB
411 * @return Return 0 on success or -1 on failure.
413 int cvmx_l2c_vrt_set_max_memsz(int memsz);
416 * Set a Virtual ID to a set of cores.
418 * @param virtid Assign virtid to a set of cores.
419 * @param coremask The group of cores to assign a unique virtual id.
420 * @return Return 0 on success, otherwise -1.
422 int cvmx_l2c_vrt_assign_virtid(int virtid, uint32_t coremask);
425 * Remove a virt id assigned to a set of cores. Update the virtid mask and
426 * virtid stored for each core.
428 * @param coremask the group of cores whose virtual id is removed.
430 void cvmx_l2c_vrt_remove_virtid(int virtid);
433 * Block a memory region to be updated by a set of virtids.
435 * @param start_addr Starting address of memory region
436 * @param size Size of the memory to protect
437 * @param virtid_mask Virtual ID to use
438 * @param mode Allow/Disallow write access
439 * = 0, Allow write access by virtid
440 * = 1, Disallow write access by virtid
442 int cvmx_l2c_vrt_memprotect(uint64_t start_addr, int size, int virtid, int mode);
445 * Enable virtualization.
447 void cvmx_l2c_vrt_enable(int mode);
450 * Disable virtualization.
452 void cvmx_l2c_vrt_disable(void);
454 #endif /* __CVMX_L2C_H__ */