diff options
Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-l2c.c')
| -rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-l2c.c | 947 |
1 files changed, 947 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..89b527329 --- /dev/null +++ b/arch/mips/cavium-octeon/executive/cvmx-l2c.c @@ -0,0 +1,947 @@ +/***********************license start*************** + * Author: Cavium Networks + * + * Contact: support@caviumnetworks.com + * This file is part of the OCTEON SDK + * + * Copyright (c) 2003-2010 Cavium Networks + * + * 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. + */ +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) { + ACCESS_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 { +#ifdef __BIG_ENDIAN_BITFIELD + uint64_t reserved:40; + uint64_t V:1; /* Line valid */ + uint64_t D:1; /* Line dirty */ + uint64_t L:1; /* Line locked */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t addr:20; /* Phys mem addr (33..14) */ +#else + uint64_t addr:20; /* Phys mem addr (33..14) */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t L:1; /* Line locked */ + uint64_t D:1; /* Line dirty */ + uint64_t V:1; /* Line valid */ + uint64_t reserved:40; +#endif + } cn50xx; + struct cvmx_l2c_tag_cn30xx { +#ifdef __BIG_ENDIAN_BITFIELD + uint64_t reserved:41; + uint64_t V:1; /* Line valid */ + uint64_t D:1; /* Line dirty */ + uint64_t L:1; /* Line locked */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t addr:19; /* Phys mem addr (33..15) */ +#else + uint64_t addr:19; /* Phys mem addr (33..15) */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t L:1; /* Line locked */ + uint64_t D:1; /* Line dirty */ + uint64_t V:1; /* Line valid */ + uint64_t reserved:41; +#endif + } cn30xx; + struct cvmx_l2c_tag_cn31xx { +#ifdef __BIG_ENDIAN_BITFIELD + uint64_t reserved:42; + uint64_t V:1; /* Line valid */ + uint64_t D:1; /* Line dirty */ + uint64_t L:1; /* Line locked */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t addr:18; /* Phys mem addr (33..16) */ +#else + uint64_t addr:18; /* Phys mem addr (33..16) */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t L:1; /* Line locked */ + uint64_t D:1; /* Line dirty */ + uint64_t V:1; /* Line valid */ + uint64_t reserved:42; +#endif + } cn31xx; + struct cvmx_l2c_tag_cn38xx { +#ifdef __BIG_ENDIAN_BITFIELD + uint64_t reserved:43; + uint64_t V:1; /* Line valid */ + uint64_t D:1; /* Line dirty */ + uint64_t L:1; /* Line locked */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t addr:17; /* Phys mem addr (33..17) */ +#else + uint64_t addr:17; /* Phys mem addr (33..17) */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t L:1; /* Line locked */ + uint64_t D:1; /* Line dirty */ + uint64_t V:1; /* Line valid */ + uint64_t reserved:43; +#endif + } cn38xx; + struct cvmx_l2c_tag_cn58xx { +#ifdef __BIG_ENDIAN_BITFIELD + uint64_t reserved:44; + uint64_t V:1; /* Line valid */ + uint64_t D:1; /* Line dirty */ + uint64_t L:1; /* Line locked */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t addr:16; /* Phys mem addr (33..18) */ +#else + uint64_t addr:16; /* Phys mem addr (33..18) */ + uint64_t U:1; /* Use, LRU eviction */ + uint64_t L:1; /* Line locked */ + uint64_t D:1; /* Line dirty */ + uint64_t V:1; /* Line valid */ + uint64_t reserved:44; +#endif + } 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 + * Returns + */ +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 { + union cvmx_l2d_fus3 val; + val.u64 = 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 ((val.u64 >> 35) & 0x1) + l2_assoc = l2_assoc >> 2; + else if ((val.u64 >> 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); + } +} |