/***********************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);
}
}