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-rw-r--r--arch/mips/cavium-octeon/executive/cvmx-l2c.c919
1 files changed, 919 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-l2c.c b/arch/mips/cavium-octeon/executive/cvmx-l2c.c
new file mode 100644
index 000000000..33b303691
--- /dev/null
+++ b/arch/mips/cavium-octeon/executive/cvmx-l2c.c
@@ -0,0 +1,919 @@
+/***********************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**************************************/
+
+/*
+ * Implementation of the Level 2 Cache (L2C) control,
+ * measurement, and debugging facilities.
+ */
+
+#include <linux/compiler.h>
+#include <linux/irqflags.h>
+#include <asm/octeon/cvmx.h>
+#include <asm/octeon/cvmx-l2c.h>
+#include <asm/octeon/cvmx-spinlock.h>
+
+/*
+ * This spinlock is used internally to ensure that only one core is
+ * performing certain L2 operations at a time.
+ *
+ * NOTE: This only protects calls from within a single application -
+ * if multiple applications or operating systems are running, then it
+ * is up to the user program to coordinate between them.
+ */
+static cvmx_spinlock_t cvmx_l2c_spinlock;
+
+int cvmx_l2c_get_core_way_partition(uint32_t core)
+{
+ uint32_t field;
+
+ /* Validate the core number */
+ if (core >= cvmx_octeon_num_cores())
+ return -1;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX))
+ return cvmx_read_csr(CVMX_L2C_WPAR_PPX(core)) & 0xffff;
+
+ /*
+ * Use the lower two bits of the coreNumber to determine the
+ * bit offset of the UMSK[] field in the L2C_SPAR register.
+ */
+ field = (core & 0x3) * 8;
+
+ /*
+ * Return the UMSK[] field from the appropriate L2C_SPAR
+ * register based on the coreNumber.
+ */
+
+ switch (core & 0xC) {
+ case 0x0:
+ return (cvmx_read_csr(CVMX_L2C_SPAR0) & (0xFF << field)) >> field;
+ case 0x4:
+ return (cvmx_read_csr(CVMX_L2C_SPAR1) & (0xFF << field)) >> field;
+ case 0x8:
+ return (cvmx_read_csr(CVMX_L2C_SPAR2) & (0xFF << field)) >> field;
+ case 0xC:
+ return (cvmx_read_csr(CVMX_L2C_SPAR3) & (0xFF << field)) >> field;
+ }
+ return 0;
+}
+
+int cvmx_l2c_set_core_way_partition(uint32_t core, uint32_t mask)
+{
+ uint32_t field;
+ uint32_t valid_mask;
+
+ valid_mask = (0x1 << cvmx_l2c_get_num_assoc()) - 1;
+
+ mask &= valid_mask;
+
+ /* A UMSK setting which blocks all L2C Ways is an error on some chips */
+ if (mask == valid_mask && !OCTEON_IS_MODEL(OCTEON_CN63XX))
+ return -1;
+
+ /* Validate the core number */
+ if (core >= cvmx_octeon_num_cores())
+ return -1;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ cvmx_write_csr(CVMX_L2C_WPAR_PPX(core), mask);
+ return 0;
+ }
+
+ /*
+ * Use the lower two bits of core to determine the bit offset of the
+ * UMSK[] field in the L2C_SPAR register.
+ */
+ field = (core & 0x3) * 8;
+
+ /*
+ * Assign the new mask setting to the UMSK[] field in the appropriate
+ * L2C_SPAR register based on the core_num.
+ *
+ */
+ switch (core & 0xC) {
+ case 0x0:
+ cvmx_write_csr(CVMX_L2C_SPAR0,
+ (cvmx_read_csr(CVMX_L2C_SPAR0) & ~(0xFF << field)) |
+ mask << field);
+ break;
+ case 0x4:
+ cvmx_write_csr(CVMX_L2C_SPAR1,
+ (cvmx_read_csr(CVMX_L2C_SPAR1) & ~(0xFF << field)) |
+ mask << field);
+ break;
+ case 0x8:
+ cvmx_write_csr(CVMX_L2C_SPAR2,
+ (cvmx_read_csr(CVMX_L2C_SPAR2) & ~(0xFF << field)) |
+ mask << field);
+ break;
+ case 0xC:
+ cvmx_write_csr(CVMX_L2C_SPAR3,
+ (cvmx_read_csr(CVMX_L2C_SPAR3) & ~(0xFF << field)) |
+ mask << field);
+ break;
+ }
+ return 0;
+}
+
+int cvmx_l2c_set_hw_way_partition(uint32_t mask)
+{
+ uint32_t valid_mask;
+
+ valid_mask = (0x1 << cvmx_l2c_get_num_assoc()) - 1;
+ mask &= valid_mask;
+
+ /* A UMSK setting which blocks all L2C Ways is an error on some chips */
+ if (mask == valid_mask && !OCTEON_IS_MODEL(OCTEON_CN63XX))
+ return -1;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX))
+ cvmx_write_csr(CVMX_L2C_WPAR_IOBX(0), mask);
+ else
+ cvmx_write_csr(CVMX_L2C_SPAR4,
+ (cvmx_read_csr(CVMX_L2C_SPAR4) & ~0xFF) | mask);
+ return 0;
+}
+
+int cvmx_l2c_get_hw_way_partition(void)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX))
+ return cvmx_read_csr(CVMX_L2C_WPAR_IOBX(0)) & 0xffff;
+ else
+ return cvmx_read_csr(CVMX_L2C_SPAR4) & (0xFF);
+}
+
+void cvmx_l2c_config_perf(uint32_t counter, enum cvmx_l2c_event event,
+ uint32_t clear_on_read)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN5XXX) || OCTEON_IS_MODEL(OCTEON_CN3XXX)) {
+ union cvmx_l2c_pfctl pfctl;
+
+ pfctl.u64 = cvmx_read_csr(CVMX_L2C_PFCTL);
+
+ switch (counter) {
+ case 0:
+ pfctl.s.cnt0sel = event;
+ pfctl.s.cnt0ena = 1;
+ pfctl.s.cnt0rdclr = clear_on_read;
+ break;
+ case 1:
+ pfctl.s.cnt1sel = event;
+ pfctl.s.cnt1ena = 1;
+ pfctl.s.cnt1rdclr = clear_on_read;
+ break;
+ case 2:
+ pfctl.s.cnt2sel = event;
+ pfctl.s.cnt2ena = 1;
+ pfctl.s.cnt2rdclr = clear_on_read;
+ break;
+ case 3:
+ default:
+ pfctl.s.cnt3sel = event;
+ pfctl.s.cnt3ena = 1;
+ pfctl.s.cnt3rdclr = clear_on_read;
+ break;
+ }
+
+ cvmx_write_csr(CVMX_L2C_PFCTL, pfctl.u64);
+ } else {
+ union cvmx_l2c_tadx_prf l2c_tadx_prf;
+ int tad;
+
+ cvmx_dprintf("L2C performance counter events are different for this chip, mapping 'event' to cvmx_l2c_tad_event_t\n");
+ if (clear_on_read)
+ cvmx_dprintf("L2C counters don't support clear on read for this chip\n");
+
+ l2c_tadx_prf.u64 = cvmx_read_csr(CVMX_L2C_TADX_PRF(0));
+
+ switch (counter) {
+ case 0:
+ l2c_tadx_prf.s.cnt0sel = event;
+ break;
+ case 1:
+ l2c_tadx_prf.s.cnt1sel = event;
+ break;
+ case 2:
+ l2c_tadx_prf.s.cnt2sel = event;
+ break;
+ default:
+ case 3:
+ l2c_tadx_prf.s.cnt3sel = event;
+ break;
+ }
+ for (tad = 0; tad < CVMX_L2C_TADS; tad++)
+ cvmx_write_csr(CVMX_L2C_TADX_PRF(tad),
+ l2c_tadx_prf.u64);
+ }
+}
+
+uint64_t cvmx_l2c_read_perf(uint32_t counter)
+{
+ switch (counter) {
+ case 0:
+ if (OCTEON_IS_MODEL(OCTEON_CN5XXX) || OCTEON_IS_MODEL(OCTEON_CN3XXX))
+ return cvmx_read_csr(CVMX_L2C_PFC0);
+ else {
+ uint64_t counter = 0;
+ int tad;
+
+ for (tad = 0; tad < CVMX_L2C_TADS; tad++)
+ counter += cvmx_read_csr(CVMX_L2C_TADX_PFC0(tad));
+ return counter;
+ }
+ case 1:
+ if (OCTEON_IS_MODEL(OCTEON_CN5XXX) || OCTEON_IS_MODEL(OCTEON_CN3XXX))
+ return cvmx_read_csr(CVMX_L2C_PFC1);
+ else {
+ uint64_t counter = 0;
+ int tad;
+
+ for (tad = 0; tad < CVMX_L2C_TADS; tad++)
+ counter += cvmx_read_csr(CVMX_L2C_TADX_PFC1(tad));
+ return counter;
+ }
+ case 2:
+ if (OCTEON_IS_MODEL(OCTEON_CN5XXX) || OCTEON_IS_MODEL(OCTEON_CN3XXX))
+ return cvmx_read_csr(CVMX_L2C_PFC2);
+ else {
+ uint64_t counter = 0;
+ int tad;
+
+ for (tad = 0; tad < CVMX_L2C_TADS; tad++)
+ counter += cvmx_read_csr(CVMX_L2C_TADX_PFC2(tad));
+ return counter;
+ }
+ case 3:
+ default:
+ if (OCTEON_IS_MODEL(OCTEON_CN5XXX) || OCTEON_IS_MODEL(OCTEON_CN3XXX))
+ return cvmx_read_csr(CVMX_L2C_PFC3);
+ else {
+ uint64_t counter = 0;
+ int tad;
+
+ for (tad = 0; tad < CVMX_L2C_TADS; tad++)
+ counter += cvmx_read_csr(CVMX_L2C_TADX_PFC3(tad));
+ return counter;
+ }
+ }
+}
+
+/*
+ * @INTERNAL
+ * Helper function use to fault in cache lines for L2 cache locking
+ *
+ * @addr: Address of base of memory region to read into L2 cache
+ * @len: Length (in bytes) of region to fault in
+ */
+static void fault_in(uint64_t addr, int len)
+{
+ char *ptr;
+
+ /*
+ * Adjust addr and length so we get all cache lines even for
+ * small ranges spanning two cache lines.
+ */
+ len += addr & CVMX_CACHE_LINE_MASK;
+ addr &= ~CVMX_CACHE_LINE_MASK;
+ ptr = cvmx_phys_to_ptr(addr);
+ /*
+ * Invalidate L1 cache to make sure all loads result in data
+ * being in L2.
+ */
+ CVMX_DCACHE_INVALIDATE;
+ while (len > 0) {
+ READ_ONCE(*ptr);
+ len -= CVMX_CACHE_LINE_SIZE;
+ ptr += CVMX_CACHE_LINE_SIZE;
+ }
+}
+
+int cvmx_l2c_lock_line(uint64_t addr)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ int shift = CVMX_L2C_TAG_ADDR_ALIAS_SHIFT;
+ uint64_t assoc = cvmx_l2c_get_num_assoc();
+ uint64_t tag = addr >> shift;
+ uint64_t index = CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, cvmx_l2c_address_to_index(addr) << CVMX_L2C_IDX_ADDR_SHIFT);
+ uint64_t way;
+ union cvmx_l2c_tadx_tag l2c_tadx_tag;
+
+ CVMX_CACHE_LCKL2(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, addr), 0);
+
+ /* Make sure we were able to lock the line */
+ for (way = 0; way < assoc; way++) {
+ CVMX_CACHE_LTGL2I(index | (way << shift), 0);
+ /* make sure CVMX_L2C_TADX_TAG is updated */
+ CVMX_SYNC;
+ l2c_tadx_tag.u64 = cvmx_read_csr(CVMX_L2C_TADX_TAG(0));
+ if (l2c_tadx_tag.s.valid && l2c_tadx_tag.s.tag == tag)
+ break;
+ }
+
+ /* Check if a valid line is found */
+ if (way >= assoc) {
+ /* cvmx_dprintf("ERROR: cvmx_l2c_lock_line: line not found for locking at 0x%llx address\n", (unsigned long long)addr); */
+ return -1;
+ }
+
+ /* Check if lock bit is not set */
+ if (!l2c_tadx_tag.s.lock) {
+ /* cvmx_dprintf("ERROR: cvmx_l2c_lock_line: Not able to lock at 0x%llx address\n", (unsigned long long)addr); */
+ return -1;
+ }
+ return way;
+ } else {
+ int retval = 0;
+ union cvmx_l2c_dbg l2cdbg;
+ union cvmx_l2c_lckbase lckbase;
+ union cvmx_l2c_lckoff lckoff;
+ union cvmx_l2t_err l2t_err;
+
+ cvmx_spinlock_lock(&cvmx_l2c_spinlock);
+
+ l2cdbg.u64 = 0;
+ lckbase.u64 = 0;
+ lckoff.u64 = 0;
+
+ /* Clear l2t error bits if set */
+ l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
+ l2t_err.s.lckerr = 1;
+ l2t_err.s.lckerr2 = 1;
+ cvmx_write_csr(CVMX_L2T_ERR, l2t_err.u64);
+
+ addr &= ~CVMX_CACHE_LINE_MASK;
+
+ /* Set this core as debug core */
+ l2cdbg.s.ppnum = cvmx_get_core_num();
+ CVMX_SYNC;
+ cvmx_write_csr(CVMX_L2C_DBG, l2cdbg.u64);
+ cvmx_read_csr(CVMX_L2C_DBG);
+
+ lckoff.s.lck_offset = 0; /* Only lock 1 line at a time */
+ cvmx_write_csr(CVMX_L2C_LCKOFF, lckoff.u64);
+ cvmx_read_csr(CVMX_L2C_LCKOFF);
+
+ if (((union cvmx_l2c_cfg)(cvmx_read_csr(CVMX_L2C_CFG))).s.idxalias) {
+ int alias_shift = CVMX_L2C_IDX_ADDR_SHIFT + 2 * CVMX_L2_SET_BITS - 1;
+ uint64_t addr_tmp = addr ^ (addr & ((1 << alias_shift) - 1)) >> CVMX_L2_SET_BITS;
+
+ lckbase.s.lck_base = addr_tmp >> 7;
+
+ } else {
+ lckbase.s.lck_base = addr >> 7;
+ }
+
+ lckbase.s.lck_ena = 1;
+ cvmx_write_csr(CVMX_L2C_LCKBASE, lckbase.u64);
+ /* Make sure it gets there */
+ cvmx_read_csr(CVMX_L2C_LCKBASE);
+
+ fault_in(addr, CVMX_CACHE_LINE_SIZE);
+
+ lckbase.s.lck_ena = 0;
+ cvmx_write_csr(CVMX_L2C_LCKBASE, lckbase.u64);
+ /* Make sure it gets there */
+ cvmx_read_csr(CVMX_L2C_LCKBASE);
+
+ /* Stop being debug core */
+ cvmx_write_csr(CVMX_L2C_DBG, 0);
+ cvmx_read_csr(CVMX_L2C_DBG);
+
+ l2t_err.u64 = cvmx_read_csr(CVMX_L2T_ERR);
+ if (l2t_err.s.lckerr || l2t_err.s.lckerr2)
+ retval = 1; /* We were unable to lock the line */
+
+ cvmx_spinlock_unlock(&cvmx_l2c_spinlock);
+ return retval;
+ }
+}
+
+int cvmx_l2c_lock_mem_region(uint64_t start, uint64_t len)
+{
+ int retval = 0;
+
+ /* Round start/end to cache line boundaries */
+ len += start & CVMX_CACHE_LINE_MASK;
+ start &= ~CVMX_CACHE_LINE_MASK;
+ len = (len + CVMX_CACHE_LINE_MASK) & ~CVMX_CACHE_LINE_MASK;
+
+ while (len) {
+ retval += cvmx_l2c_lock_line(start);
+ start += CVMX_CACHE_LINE_SIZE;
+ len -= CVMX_CACHE_LINE_SIZE;
+ }
+ return retval;
+}
+
+void cvmx_l2c_flush(void)
+{
+ uint64_t assoc, set;
+ uint64_t n_assoc, n_set;
+
+ n_set = cvmx_l2c_get_num_sets();
+ n_assoc = cvmx_l2c_get_num_assoc();
+
+ if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
+ uint64_t address;
+ /* These may look like constants, but they aren't... */
+ int assoc_shift = CVMX_L2C_TAG_ADDR_ALIAS_SHIFT;
+ int set_shift = CVMX_L2C_IDX_ADDR_SHIFT;
+
+ for (set = 0; set < n_set; set++) {
+ for (assoc = 0; assoc < n_assoc; assoc++) {
+ address = CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
+ (assoc << assoc_shift) | (set << set_shift));
+ CVMX_CACHE_WBIL2I(address, 0);
+ }
+ }
+ } else {
+ for (set = 0; set < n_set; set++)
+ for (assoc = 0; assoc < n_assoc; assoc++)
+ cvmx_l2c_flush_line(assoc, set);
+ }
+}
+
+
+int cvmx_l2c_unlock_line(uint64_t address)
+{
+
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ int assoc;
+ union cvmx_l2c_tag tag;
+ uint32_t tag_addr;
+ uint32_t index = cvmx_l2c_address_to_index(address);
+
+ tag_addr = ((address >> CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) & ((1 << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) - 1));
+
+ /*
+ * For 63XX, we can flush a line by using the physical
+ * address directly, so finding the cache line used by
+ * the address is only required to provide the proper
+ * return value for the function.
+ */
+ for (assoc = 0; assoc < CVMX_L2_ASSOC; assoc++) {
+ tag = cvmx_l2c_get_tag(assoc, index);
+
+ if (tag.s.V && (tag.s.addr == tag_addr)) {
+ CVMX_CACHE_WBIL2(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, address), 0);
+ return tag.s.L;
+ }
+ }
+ } else {
+ int assoc;
+ union cvmx_l2c_tag tag;
+ uint32_t tag_addr;
+
+ uint32_t index = cvmx_l2c_address_to_index(address);
+
+ /* Compute portion of address that is stored in tag */
+ tag_addr = ((address >> CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) & ((1 << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) - 1));
+ for (assoc = 0; assoc < CVMX_L2_ASSOC; assoc++) {
+ tag = cvmx_l2c_get_tag(assoc, index);
+
+ if (tag.s.V && (tag.s.addr == tag_addr)) {
+ cvmx_l2c_flush_line(assoc, index);
+ return tag.s.L;
+ }
+ }
+ }
+ return 0;
+}
+
+int cvmx_l2c_unlock_mem_region(uint64_t start, uint64_t len)
+{
+ int num_unlocked = 0;
+ /* Round start/end to cache line boundaries */
+ len += start & CVMX_CACHE_LINE_MASK;
+ start &= ~CVMX_CACHE_LINE_MASK;
+ len = (len + CVMX_CACHE_LINE_MASK) & ~CVMX_CACHE_LINE_MASK;
+ while (len > 0) {
+ num_unlocked += cvmx_l2c_unlock_line(start);
+ start += CVMX_CACHE_LINE_SIZE;
+ len -= CVMX_CACHE_LINE_SIZE;
+ }
+
+ return num_unlocked;
+}
+
+/*
+ * Internal l2c tag types. These are converted to a generic structure
+ * that can be used on all chips.
+ */
+union __cvmx_l2c_tag {
+ uint64_t u64;
+ struct cvmx_l2c_tag_cn50xx {
+ __BITFIELD_FIELD(uint64_t reserved:40,
+ __BITFIELD_FIELD(uint64_t V:1, /* Line valid */
+ __BITFIELD_FIELD(uint64_t D:1, /* Line dirty */
+ __BITFIELD_FIELD(uint64_t L:1, /* Line locked */
+ __BITFIELD_FIELD(uint64_t U:1, /* Use, LRU eviction */
+ __BITFIELD_FIELD(uint64_t addr:20, /* Phys addr (33..14) */
+ ;))))))
+ } cn50xx;
+ struct cvmx_l2c_tag_cn30xx {
+ __BITFIELD_FIELD(uint64_t reserved:41,
+ __BITFIELD_FIELD(uint64_t V:1, /* Line valid */
+ __BITFIELD_FIELD(uint64_t D:1, /* Line dirty */
+ __BITFIELD_FIELD(uint64_t L:1, /* Line locked */
+ __BITFIELD_FIELD(uint64_t U:1, /* Use, LRU eviction */
+ __BITFIELD_FIELD(uint64_t addr:19, /* Phys addr (33..15) */
+ ;))))))
+ } cn30xx;
+ struct cvmx_l2c_tag_cn31xx {
+ __BITFIELD_FIELD(uint64_t reserved:42,
+ __BITFIELD_FIELD(uint64_t V:1, /* Line valid */
+ __BITFIELD_FIELD(uint64_t D:1, /* Line dirty */
+ __BITFIELD_FIELD(uint64_t L:1, /* Line locked */
+ __BITFIELD_FIELD(uint64_t U:1, /* Use, LRU eviction */
+ __BITFIELD_FIELD(uint64_t addr:18, /* Phys addr (33..16) */
+ ;))))))
+ } cn31xx;
+ struct cvmx_l2c_tag_cn38xx {
+ __BITFIELD_FIELD(uint64_t reserved:43,
+ __BITFIELD_FIELD(uint64_t V:1, /* Line valid */
+ __BITFIELD_FIELD(uint64_t D:1, /* Line dirty */
+ __BITFIELD_FIELD(uint64_t L:1, /* Line locked */
+ __BITFIELD_FIELD(uint64_t U:1, /* Use, LRU eviction */
+ __BITFIELD_FIELD(uint64_t addr:17, /* Phys addr (33..17) */
+ ;))))))
+ } cn38xx;
+ struct cvmx_l2c_tag_cn58xx {
+ __BITFIELD_FIELD(uint64_t reserved:44,
+ __BITFIELD_FIELD(uint64_t V:1, /* Line valid */
+ __BITFIELD_FIELD(uint64_t D:1, /* Line dirty */
+ __BITFIELD_FIELD(uint64_t L:1, /* Line locked */
+ __BITFIELD_FIELD(uint64_t U:1, /* Use, LRU eviction */
+ __BITFIELD_FIELD(uint64_t addr:16, /* Phys addr (33..18) */
+ ;))))))
+ } cn58xx;
+ struct cvmx_l2c_tag_cn58xx cn56xx; /* 2048 sets */
+ struct cvmx_l2c_tag_cn31xx cn52xx; /* 512 sets */
+};
+
+
+/*
+ * @INTERNAL
+ * Function to read a L2C tag. This code make the current core
+ * the 'debug core' for the L2. This code must only be executed by
+ * 1 core at a time.
+ *
+ * @assoc: Association (way) of the tag to dump
+ * @index: Index of the cacheline
+ *
+ * Returns The Octeon model specific tag structure. This is
+ * translated by a wrapper function to a generic form that is
+ * easier for applications to use.
+ */
+static union __cvmx_l2c_tag __read_l2_tag(uint64_t assoc, uint64_t index)
+{
+
+ uint64_t debug_tag_addr = CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, (index << 7) + 96);
+ uint64_t core = cvmx_get_core_num();
+ union __cvmx_l2c_tag tag_val;
+ uint64_t dbg_addr = CVMX_L2C_DBG;
+ unsigned long flags;
+ union cvmx_l2c_dbg debug_val;
+
+ debug_val.u64 = 0;
+ /*
+ * For low core count parts, the core number is always small
+ * enough to stay in the correct field and not set any
+ * reserved bits.
+ */
+ debug_val.s.ppnum = core;
+ debug_val.s.l2t = 1;
+ debug_val.s.set = assoc;
+
+ local_irq_save(flags);
+ /*
+ * Make sure core is quiet (no prefetches, etc.) before
+ * entering debug mode.
+ */
+ CVMX_SYNC;
+ /* Flush L1 to make sure debug load misses L1 */
+ CVMX_DCACHE_INVALIDATE;
+
+ /*
+ * The following must be done in assembly as when in debug
+ * mode all data loads from L2 return special debug data, not
+ * normal memory contents. Also, interrupts must be disabled,
+ * since if an interrupt occurs while in debug mode the ISR
+ * will get debug data from all its memory * reads instead of
+ * the contents of memory.
+ */
+
+ asm volatile (
+ ".set push\n\t"
+ ".set mips64\n\t"
+ ".set noreorder\n\t"
+ "sd %[dbg_val], 0(%[dbg_addr])\n\t" /* Enter debug mode, wait for store */
+ "ld $0, 0(%[dbg_addr])\n\t"
+ "ld %[tag_val], 0(%[tag_addr])\n\t" /* Read L2C tag data */
+ "sd $0, 0(%[dbg_addr])\n\t" /* Exit debug mode, wait for store */
+ "ld $0, 0(%[dbg_addr])\n\t"
+ "cache 9, 0($0)\n\t" /* Invalidate dcache to discard debug data */
+ ".set pop"
+ : [tag_val] "=r" (tag_val)
+ : [dbg_addr] "r" (dbg_addr), [dbg_val] "r" (debug_val), [tag_addr] "r" (debug_tag_addr)
+ : "memory");
+
+ local_irq_restore(flags);
+
+ return tag_val;
+}
+
+
+union cvmx_l2c_tag cvmx_l2c_get_tag(uint32_t association, uint32_t index)
+{
+ union cvmx_l2c_tag tag;
+
+ tag.u64 = 0;
+ if ((int)association >= cvmx_l2c_get_num_assoc()) {
+ cvmx_dprintf("ERROR: cvmx_l2c_get_tag association out of range\n");
+ return tag;
+ }
+ if ((int)index >= cvmx_l2c_get_num_sets()) {
+ cvmx_dprintf("ERROR: cvmx_l2c_get_tag index out of range (arg: %d, max: %d)\n",
+ (int)index, cvmx_l2c_get_num_sets());
+ return tag;
+ }
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ union cvmx_l2c_tadx_tag l2c_tadx_tag;
+ uint64_t address = CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
+ (association << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) |
+ (index << CVMX_L2C_IDX_ADDR_SHIFT));
+ /*
+ * Use L2 cache Index load tag cache instruction, as
+ * hardware loads the virtual tag for the L2 cache
+ * block with the contents of L2C_TAD0_TAG
+ * register.
+ */
+ CVMX_CACHE_LTGL2I(address, 0);
+ CVMX_SYNC; /* make sure CVMX_L2C_TADX_TAG is updated */
+ l2c_tadx_tag.u64 = cvmx_read_csr(CVMX_L2C_TADX_TAG(0));
+
+ tag.s.V = l2c_tadx_tag.s.valid;
+ tag.s.D = l2c_tadx_tag.s.dirty;
+ tag.s.L = l2c_tadx_tag.s.lock;
+ tag.s.U = l2c_tadx_tag.s.use;
+ tag.s.addr = l2c_tadx_tag.s.tag;
+ } else {
+ union __cvmx_l2c_tag tmp_tag;
+ /* __read_l2_tag is intended for internal use only */
+ tmp_tag = __read_l2_tag(association, index);
+
+ /*
+ * Convert all tag structure types to generic version,
+ * as it can represent all models.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) {
+ tag.s.V = tmp_tag.cn58xx.V;
+ tag.s.D = tmp_tag.cn58xx.D;
+ tag.s.L = tmp_tag.cn58xx.L;
+ tag.s.U = tmp_tag.cn58xx.U;
+ tag.s.addr = tmp_tag.cn58xx.addr;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN38XX)) {
+ tag.s.V = tmp_tag.cn38xx.V;
+ tag.s.D = tmp_tag.cn38xx.D;
+ tag.s.L = tmp_tag.cn38xx.L;
+ tag.s.U = tmp_tag.cn38xx.U;
+ tag.s.addr = tmp_tag.cn38xx.addr;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN52XX)) {
+ tag.s.V = tmp_tag.cn31xx.V;
+ tag.s.D = tmp_tag.cn31xx.D;
+ tag.s.L = tmp_tag.cn31xx.L;
+ tag.s.U = tmp_tag.cn31xx.U;
+ tag.s.addr = tmp_tag.cn31xx.addr;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN30XX)) {
+ tag.s.V = tmp_tag.cn30xx.V;
+ tag.s.D = tmp_tag.cn30xx.D;
+ tag.s.L = tmp_tag.cn30xx.L;
+ tag.s.U = tmp_tag.cn30xx.U;
+ tag.s.addr = tmp_tag.cn30xx.addr;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN50XX)) {
+ tag.s.V = tmp_tag.cn50xx.V;
+ tag.s.D = tmp_tag.cn50xx.D;
+ tag.s.L = tmp_tag.cn50xx.L;
+ tag.s.U = tmp_tag.cn50xx.U;
+ tag.s.addr = tmp_tag.cn50xx.addr;
+ } else {
+ cvmx_dprintf("Unsupported OCTEON Model in %s\n", __func__);
+ }
+ }
+ return tag;
+}
+
+uint32_t cvmx_l2c_address_to_index(uint64_t addr)
+{
+ uint64_t idx = addr >> CVMX_L2C_IDX_ADDR_SHIFT;
+ int indxalias = 0;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
+ union cvmx_l2c_ctl l2c_ctl;
+
+ l2c_ctl.u64 = cvmx_read_csr(CVMX_L2C_CTL);
+ indxalias = !l2c_ctl.s.disidxalias;
+ } else {
+ union cvmx_l2c_cfg l2c_cfg;
+
+ l2c_cfg.u64 = cvmx_read_csr(CVMX_L2C_CFG);
+ indxalias = l2c_cfg.s.idxalias;
+ }
+
+ if (indxalias) {
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ uint32_t a_14_12 = (idx / (CVMX_L2C_MEMBANK_SELECT_SIZE/(1<<CVMX_L2C_IDX_ADDR_SHIFT))) & 0x7;
+
+ idx ^= idx / cvmx_l2c_get_num_sets();
+ idx ^= a_14_12;
+ } else {
+ idx ^= ((addr & CVMX_L2C_ALIAS_MASK) >> CVMX_L2C_TAG_ADDR_ALIAS_SHIFT);
+ }
+ }
+ idx &= CVMX_L2C_IDX_MASK;
+ return idx;
+}
+
+int cvmx_l2c_get_cache_size_bytes(void)
+{
+ return cvmx_l2c_get_num_sets() * cvmx_l2c_get_num_assoc() *
+ CVMX_CACHE_LINE_SIZE;
+}
+
+/*
+ * Return log base 2 of the number of sets in the L2 cache
+ */
+int cvmx_l2c_get_set_bits(void)
+{
+ int l2_set_bits;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN58XX))
+ l2_set_bits = 11; /* 2048 sets */
+ else if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN63XX))
+ l2_set_bits = 10; /* 1024 sets */
+ else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN52XX))
+ l2_set_bits = 9; /* 512 sets */
+ else if (OCTEON_IS_MODEL(OCTEON_CN30XX))
+ l2_set_bits = 8; /* 256 sets */
+ else if (OCTEON_IS_MODEL(OCTEON_CN50XX))
+ l2_set_bits = 7; /* 128 sets */
+ else {
+ cvmx_dprintf("Unsupported OCTEON Model in %s\n", __func__);
+ l2_set_bits = 11; /* 2048 sets */
+ }
+ return l2_set_bits;
+}
+
+/* Return the number of sets in the L2 Cache */
+int cvmx_l2c_get_num_sets(void)
+{
+ return 1 << cvmx_l2c_get_set_bits();
+}
+
+/* Return the number of associations in the L2 Cache */
+int cvmx_l2c_get_num_assoc(void)
+{
+ int l2_assoc;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN52XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN58XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN50XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN38XX))
+ l2_assoc = 8;
+ else if (OCTEON_IS_MODEL(OCTEON_CN63XX))
+ l2_assoc = 16;
+ else if (OCTEON_IS_MODEL(OCTEON_CN31XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN30XX))
+ l2_assoc = 4;
+ else {
+ cvmx_dprintf("Unsupported OCTEON Model in %s\n", __func__);
+ l2_assoc = 8;
+ }
+
+ /* Check to see if part of the cache is disabled */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ union cvmx_mio_fus_dat3 mio_fus_dat3;
+
+ mio_fus_dat3.u64 = cvmx_read_csr(CVMX_MIO_FUS_DAT3);
+ /*
+ * cvmx_mio_fus_dat3.s.l2c_crip fuses map as follows
+ * <2> will be not used for 63xx
+ * <1> disables 1/2 ways
+ * <0> disables 1/4 ways
+ * They are cumulative, so for 63xx:
+ * <1> <0>
+ * 0 0 16-way 2MB cache
+ * 0 1 12-way 1.5MB cache
+ * 1 0 8-way 1MB cache
+ * 1 1 4-way 512KB cache
+ */
+
+ if (mio_fus_dat3.s.l2c_crip == 3)
+ l2_assoc = 4;
+ else if (mio_fus_dat3.s.l2c_crip == 2)
+ l2_assoc = 8;
+ else if (mio_fus_dat3.s.l2c_crip == 1)
+ l2_assoc = 12;
+ } else {
+ uint64_t l2d_fus3;
+
+ l2d_fus3 = cvmx_read_csr(CVMX_L2D_FUS3);
+ /*
+ * Using shifts here, as bit position names are
+ * different for each model but they all mean the
+ * same.
+ */
+ if ((l2d_fus3 >> 35) & 0x1)
+ l2_assoc = l2_assoc >> 2;
+ else if ((l2d_fus3 >> 34) & 0x1)
+ l2_assoc = l2_assoc >> 1;
+ }
+ return l2_assoc;
+}
+
+/*
+ * 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)
+{
+ /* Check the range of the index. */
+ if (index > (uint32_t)cvmx_l2c_get_num_sets()) {
+ cvmx_dprintf("ERROR: cvmx_l2c_flush_line index out of range.\n");
+ return;
+ }
+
+ /* Check the range of association. */
+ if (assoc > (uint32_t)cvmx_l2c_get_num_assoc()) {
+ cvmx_dprintf("ERROR: cvmx_l2c_flush_line association out of range.\n");
+ return;
+ }
+
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX)) {
+ uint64_t address;
+ /* Create the address based on index and association.
+ * Bits<20:17> select the way of the cache block involved in
+ * the operation
+ * Bits<16:7> of the effect address select the index
+ */
+ address = CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
+ (assoc << CVMX_L2C_TAG_ADDR_ALIAS_SHIFT) |
+ (index << CVMX_L2C_IDX_ADDR_SHIFT));
+ CVMX_CACHE_WBIL2I(address, 0);
+ } else {
+ union cvmx_l2c_dbg l2cdbg;
+
+ l2cdbg.u64 = 0;
+ if (!OCTEON_IS_MODEL(OCTEON_CN30XX))
+ l2cdbg.s.ppnum = cvmx_get_core_num();
+ l2cdbg.s.finv = 1;
+
+ l2cdbg.s.set = assoc;
+ cvmx_spinlock_lock(&cvmx_l2c_spinlock);
+ /*
+ * Enter debug mode, and make sure all other writes
+ * complete before we enter debug mode
+ */
+ CVMX_SYNC;
+ cvmx_write_csr(CVMX_L2C_DBG, l2cdbg.u64);
+ cvmx_read_csr(CVMX_L2C_DBG);
+
+ CVMX_PREPARE_FOR_STORE(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS,
+ index * CVMX_CACHE_LINE_SIZE),
+ 0);
+ /* Exit debug mode */
+ CVMX_SYNC;
+ cvmx_write_csr(CVMX_L2C_DBG, 0);
+ cvmx_read_csr(CVMX_L2C_DBG);
+ cvmx_spinlock_unlock(&cvmx_l2c_spinlock);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 02:58:23 +0000