Quelle cvmx-l2c.c
Sprache: C
/***********************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)) & 0 xffff;
/*
* Use the lower two bits of the coreNumber to determine the
* bit offset of the UMSK [ ] field in the L2C_SPAR register .
*/
field = (core & 0 x3) * 8 ;
/*
* Return the UMSK [ ] field from the appropriate L2C_SPAR
* register based on the coreNumber .
*/
switch (core & 0 xC) {
case 0 x0:
return (cvmx_read_csr(CVMX_L2C_SPAR0) & (0 xFF << field)) >> field;
case 0 x4:
return (cvmx_read_csr(CVMX_L2C_SPAR1) & (0 xFF << field)) >> field;
case 0 x8:
return (cvmx_read_csr(CVMX_L2C_SPAR2) & (0 xFF << field)) >> field;
case 0 xC:
return (cvmx_read_csr(CVMX_L2C_SPAR3) & (0 xFF << 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 = (0 x1 << 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 & 0 x3) * 8 ;
/*
* Assign the new mask setting to the UMSK [ ] field in the appropriate
* L2C_SPAR register based on the core_num .
*
*/
switch (core & 0 xC) {
case 0 x0:
cvmx_write_csr(CVMX_L2C_SPAR0,
(cvmx_read_csr(CVMX_L2C_SPAR0) & ~(0 xFF << field)) |
mask << field);
break ;
case 0 x4:
cvmx_write_csr(CVMX_L2C_SPAR1,
(cvmx_read_csr(CVMX_L2C_SPAR1) & ~(0 xFF << field)) |
mask << field);
break ;
case 0 x8:
cvmx_write_csr(CVMX_L2C_SPAR2,
(cvmx_read_csr(CVMX_L2C_SPAR2) & ~(0 xFF << field)) |
mask << field);
break ;
case 0 xC:
cvmx_write_csr(CVMX_L2C_SPAR3,
(cvmx_read_csr(CVMX_L2C_SPAR3) & ~(0 xFF << field)) |
mask << field);
break ;
}
return 0 ;
}
int cvmx_l2c_set_hw_way_partition(uint32_t mask)
{
uint32_t valid_mask;
valid_mask = (0 x1 << 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) & ~0 xFF) | 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 )) & 0 xffff;
else
return cvmx_read_csr(CVMX_L2C_SPAR4) & (0 xFF);
}
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 63 XX , 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))) & 0 x7;
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 63 xx
* < 1 > disables 1 / 2 ways
* < 0 > disables 1 / 4 ways
* They are cumulative , so for 63 xx :
* < 1 > < 0 >
* 0 0 16 - way 2 MB cache
* 0 1 12 - way 1 . 5 MB cache
* 1 0 8 - way 1 MB cache
* 1 1 4 - way 512 KB 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 ) & 0 x1)
l2_assoc = l2_assoc >> 2 ;
else if ((l2d_fus3 >> 34 ) & 0 x1)
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);
}
}
Messung V0.5 in Prozent C=91 H=86 G=88
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-09-27)
¤
*© Formatika GbR, Deutschland
2026-10-10
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