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freebsd-dev/sys/contrib/octeon-sdk/cvmx-l2c.c
Ed Maste 34cb0eb2ed octeon sdk: initialize variable to quiet Clang warning 
Clang complains "variable 'dummy' is uninitialized when used here".

Reported by:	Clang
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
2017-09-14 16:41:22 +00:00

1629 lines
53 KiB
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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Inc. nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* Implementation of the Level 2 Cache (L2C) control,
* measurement, and debugging facilities.
*
* <hr>$Revision: 70215 $<hr>
*
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-l2c.h>
#include <asm/octeon/cvmx-spinlock.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "cvmx-config.h"
#endif
#include "cvmx.h"
#include "cvmx-l2c.h"
#include "cvmx-spinlock.h"
#include "cvmx-interrupt.h"
#endif
#ifndef CVMX_BUILD_FOR_LINUX_HOST
/*
* 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_SHARED cvmx_spinlock_t cvmx_l2c_spinlock;
#endif
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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX))
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_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX)))
return -1;
/* Validate the core number */
if (core >= cvmx_octeon_num_cores())
return -1;
if (OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX)))
return -1;
if (OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX))
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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX))
return cvmx_read_csr(CVMX_L2C_WPAR_IOBX(0)) & 0xffff;
else
return cvmx_read_csr(CVMX_L2C_SPAR4) & (0xFF);
}
int cvmx_l2c_set_hw_way_partition2(uint32_t mask)
{
uint32_t valid_mask;
if (!OCTEON_IS_MODEL(OCTEON_CN68XX))
return -1;
valid_mask = (0x1 << cvmx_l2c_get_num_assoc()) - 1;
mask &= valid_mask;
cvmx_write_csr(CVMX_L2C_WPAR_IOBX(1), mask);
return 0;
}
int cvmx_l2c_get_hw_way_partition2(void)
{
if (!OCTEON_IS_MODEL(OCTEON_CN68XX)) {
cvmx_warn("only one IOB on this chip");
return -1;
}
return cvmx_read_csr(CVMX_L2C_WPAR_IOBX(1)) & 0xffff;
}
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_warn("L2C performance counter events are different for this chip, mapping 'event' to cvmx_l2c_tad_event_t\n");
cvmx_warn_if(clear_on_read, "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;
}
}
}
#ifndef CVMX_BUILD_FOR_LINUX_HOST
/**
* @INTERNAL
* Helper function use to fault in cache lines for L2 cache locking
*
* @param addr Address of base of memory region to read into L2 cache
* @param len Length (in bytes) of region to fault in
*/
static void fault_in(uint64_t addr, int len)
{
volatile char *ptr;
volatile char dummy = 0;
/*
* 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 = (volatile char *)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) {
dummy += *ptr;
len -= CVMX_CACHE_LINE_SIZE;
ptr += CVMX_CACHE_LINE_SIZE;
}
}
int cvmx_l2c_lock_line(uint64_t addr)
{
if (OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
int shift = CVMX_L2C_TAG_ADDR_ALIAS_SHIFT;
uint64_t assoc = cvmx_l2c_get_num_assoc();
uint32_t tag = cvmx_l2c_v2_address_to_tag(addr);
uint64_t indext = cvmx_l2c_address_to_index(addr) << CVMX_L2C_IDX_ADDR_SHIFT;
uint64_t index = CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, indext);
uint64_t way;
uint32_t tad;
union cvmx_l2c_tadx_tag l2c_tadx_tag;
if (tag == 0xFFFFFFFF) {
cvmx_dprintf("ERROR: cvmx_l2c_lock_line: addr 0x%llx in LMC hole."
"\n", (unsigned long long) addr);
return -1;
}
tad = cvmx_l2c_address_to_tad(addr);
/* cvmx_dprintf("shift=%d index=%lx tag=%x\n",shift, index, tag); */
CVMX_CACHE_LCKL2(CVMX_ADD_SEG(CVMX_MIPS_SPACE_XKPHYS, addr), 0);
CVMX_SYNCW;
/* Make sure we were able to lock the line */
for (way = 0; way < assoc; way++) {
uint64_t caddr = index | (way << shift);
CVMX_CACHE_LTGL2I(caddr, 0);
/* make sure CVMX_L2C_TADX_TAG is updated */
CVMX_SYNC;
l2c_tadx_tag.u64 = cvmx_read_csr(CVMX_L2C_TADX_TAG(tad));
if (l2c_tadx_tag.s.valid && l2c_tadx_tag.s.tag == tag)
break;
/* cvmx_printf("caddr=%lx tad=%d tagu64=%lx valid=%x tag=%x \n", caddr,
tad, l2c_tadx_tag.u64, l2c_tadx_tag.s.valid, l2c_tadx_tag.s.tag); */
}
/* 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 0;
} 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_l2c_get_set_bits() - 1;
uint64_t addr_tmp = addr ^ (addr & ((1 << alias_shift) - 1)) >> cvmx_l2c_get_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) {
if (cvmx_l2c_lock_line(start) != 0)
retval--;
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) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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)
{
uint32_t tad = cvmx_l2c_address_to_tad(address);
if (OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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 OcteonII, 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_l2c_get_num_assoc(); assoc++) {
tag = cvmx_l2c_get_tag_v2(assoc, index, tad);
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_l2c_get_num_assoc(); assoc++) {
tag = cvmx_l2c_get_tag_v2(assoc, index, tad);
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;
#ifdef __BIG_ENDIAN_BITFIELD
struct cvmx_l2c_tag_cn50xx {
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) */
} cn50xx;
struct cvmx_l2c_tag_cn30xx {
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) */
} cn30xx;
struct cvmx_l2c_tag_cn31xx {
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) */
} cn31xx;
struct cvmx_l2c_tag_cn38xx {
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) */
} cn38xx;
struct cvmx_l2c_tag_cn58xx {
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) */
} cn58xx;
#else
struct cvmx_l2c_tag_cn50xx {
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;
} cn50xx;
struct cvmx_l2c_tag_cn30xx {
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;
} cn30xx;
struct cvmx_l2c_tag_cn31xx {
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;
} cn31xx;
struct cvmx_l2c_tag_cn38xx {
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;
} cn38xx;
struct cvmx_l2c_tag_cn58xx {
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;
} cn58xx;
#endif
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.
*
* @param assoc Association (way) of the tag to dump
* @param index Index of the cacheline
*
* @return 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;
cvmx_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");
cvmx_local_irq_restore(flags);
return tag_val;
}
union cvmx_l2c_tag cvmx_l2c_get_tag_v2(uint32_t association, uint32_t index, uint32_t tad)
{
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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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.
*/
if (tad > CVMX_L2C_TADS) {
cvmx_dprintf("ERROR: cvmx_l2c_get_tag_v2: TAD#%d out of range\n", (unsigned int)tad);
return tag;
}
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(tad));
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;
}
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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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));
if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
cvmx_dprintf("ERROR: Cannot use %s on OCTEON CN68XX, use cvmx_l2c_get_tag_v2 instead!\n",
__func__);
return tag;
}
/*
* 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;
}
#endif
int cvmx_l2c_address_to_tad(uint64_t addr)
{
uint32_t tad;
if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
cvmx_l2c_ctl_t l2c_ctl;
l2c_ctl.u64 = cvmx_read_csr(CVMX_L2C_CTL);
if (!l2c_ctl.s.disidxalias) {
tad = ((addr >> 7) ^ (addr >> 12) ^ (addr >> 18)) & 3;
} else {
tad = (addr >> 7) & 3;
}
} else {
tad = 0;
}
return tad;
}
uint32_t cvmx_l2c_v2_address_to_tag(uint64_t addr)
{
#define DR0_END ( (256 * 1024 * 1024) -1)
#define DR1_START (512 * 1024 * 1024)
#define L2_HOLE (256 * 1024 * 1024)
if ( (addr > DR0_END) && (addr < DR1_START) ) return (uint32_t) (-1);
if (addr > DR1_START) addr = addr - L2_HOLE ;
addr = addr & 0x7FFFFFFFFULL;
return (uint32_t )(addr >> CVMX_L2C_TAG_ADDR_ALIAS_SHIFT);
}
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) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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_CN68XX)) {
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()) & 0x3ff;
idx ^= a_14_12 & 0x3;
idx ^= a_14_12 << 2;
} else if (OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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
* @return
*/
int cvmx_l2c_get_set_bits(void)
{
int l2_set_bits;
if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN68XX))
l2_set_bits = 11; /* 2048 sets */
else if (OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN63XX) || OCTEON_IS_MODEL(OCTEON_CN66XX))
l2_set_bits = 10; /* 1024 sets */
else if (OCTEON_IS_MODEL(OCTEON_CN31XX) || OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN61XX) || OCTEON_IS_MODEL(OCTEON_CNF71XX))
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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX))
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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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.cn63xx.l2c_crip == 3)
l2_assoc = 4;
else if (mio_fus_dat3.cn63xx.l2c_crip == 2)
l2_assoc = 8;
else if (mio_fus_dat3.cn63xx.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;
}
#ifndef CVMX_BUILD_FOR_LINUX_HOST
/**
* 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.
*
* @param assoc Association (or way) to flush
* @param 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_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
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);
}
}
#endif
/**
* Initialize the BIG address in L2C+DRAM to generate proper error
* on reading/writing to an non-existant memory location.
*
* @param mem_size Amount of DRAM configured in MB.
* @param mode Allow/Disallow reporting errors L2C_INT_SUM[BIGRD,BIGWR].
*/
void cvmx_l2c_set_big_size(uint64_t mem_size, int mode)
{
if ((OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX))
&& !OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
{
cvmx_l2c_big_ctl_t big_ctl;
int bits = 0, zero_bits = 0;
uint64_t mem;
if (mem_size > (CVMX_L2C_MAX_MEMSZ_ALLOWED * 1024))
{
cvmx_dprintf("WARNING: Invalid memory size(%lld) requested, should be <= %lld\n",
(unsigned long long)mem_size, (unsigned long long)CVMX_L2C_MAX_MEMSZ_ALLOWED * 1024);
mem_size = CVMX_L2C_MAX_MEMSZ_ALLOWED * 1024;
}
mem = mem_size;
while (mem)
{
if ((mem & 1) == 0)
zero_bits++;
bits++;
mem >>= 1;
}
if ((bits - zero_bits) != 1 || (bits - 9) <= 0)
{
cvmx_dprintf("ERROR: Invalid DRAM size (%lld) requested, refer to L2C_BIG_CTL[maxdram] for valid options.\n", (unsigned long long)mem_size);
return;
}
big_ctl.u64 = 0;
big_ctl.s.maxdram = bits - 9;
big_ctl.s.disable = mode;
cvmx_write_csr(CVMX_L2C_BIG_CTL, big_ctl.u64);
}
}
#if !defined(CVMX_BUILD_FOR_LINUX_HOST) && !defined(CVMX_BUILD_FOR_LINUX_KERNEL)
/* L2C Virtualization APIs. These APIs are based on Octeon II documentation. */
/*
* These could be used by the Linux kernel, but currently are not, so
* disable them to save space.
*/
/**
* @INTERNAL
* Helper function to decode VALUE to number of allowed virtualization IDS.
* Returns L2C_VRT_CTL[NUMID].
*
* @param nvid Number of virtual Ids.
* @return On success decode to NUMID, or to -1 on failure.
*/
static inline int __cvmx_l2c_vrt_decode_numid(int nvid)
{
int bits = -1;
int zero_bits = -1;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
if (nvid < 1 || nvid > CVMX_L2C_VRT_MAX_VIRTID_ALLOWED) {
cvmx_dprintf("WARNING: Invalid number of virtual ids(%d) requested, should be <= 64\n",
nvid);
return bits;
}
while (nvid) {
if ((nvid & 1) == 0)
zero_bits++;
bits++;
nvid >>= 1;
}
if (bits == 1 || (zero_bits && ((bits - zero_bits) == 1)))
return zero_bits;
return -1;
}
/**
* Set maxium number of Virtual IDs allowed in a machine.
*
* @param nvid Number of virtial ids allowed in a machine.
* @return Return 0 on success or -1 on failure.
*/
int cvmx_l2c_vrt_set_max_virtids(int nvid)
{
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
if (l2c_vrt_ctl.s.enable) {
cvmx_dprintf("WARNING: Changing number of Virtual Machine IDs is not allowed after Virtualization is enabled\n");
return -1;
}
if (nvid < 1 || nvid > CVMX_L2C_VRT_MAX_VIRTID_ALLOWED) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_set_max_virtids: Invalid number of Virtual Machine IDs(%d) requested, max allowed %d\n",
nvid, CVMX_L2C_VRT_MAX_VIRTID_ALLOWED);
return -1;
}
/* Calculate the numid based on nvid */
l2c_vrt_ctl.s.numid = __cvmx_l2c_vrt_decode_numid(nvid);
cvmx_write_csr(CVMX_L2C_VRT_CTL, l2c_vrt_ctl.u64);
return 0;
}
/**
* Get maxium number of virtual IDs allowed in a machine.
*
* @return Return number of virtual machine IDs or -1 on failure.
*/
int cvmx_l2c_vrt_get_max_virtids(void)
{
int virtids;
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
virtids = 1 << (l2c_vrt_ctl.s.numid + 1);
if (virtids > CVMX_L2C_VRT_MAX_VIRTID_ALLOWED) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_get_max_virtids: Invalid number of Virtual IDs initialized (%d)\n",
virtids);
return -1;
}
return virtids;
}
/**
* @INTERNAL
* Helper function to decode VALUE to memory space coverage of L2C_VRT_MEM.
* Returns L2C_VRT_CTL[MEMSZ].
*
* @param memsz Memory in GB.
* @return On success, decode to MEMSZ, or on failure return -1.
*/
static inline int __cvmx_l2c_vrt_decode_memsize(int memsz)
{
int bits = 0;
int zero_bits = 0;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
if (memsz == 0 || memsz > CVMX_L2C_MAX_MEMSZ_ALLOWED) {
cvmx_dprintf("WARNING: Invalid virtual memory size(%d) requested, should be <= %d\n",
memsz, CVMX_L2C_MAX_MEMSZ_ALLOWED);
return -1;
}
while (memsz) {
if ((memsz & 1) == 0)
zero_bits++;
bits++;
memsz >>= 1;
}
if (bits == 1 || (bits - zero_bits) == 1)
return zero_bits;
return -1;
}
/**
* Set the maxium size of memory space to be allocated for virtualization.
*
* @param memsz Size of the virtual memory in GB
* @return Return 0 on success or -1 on failure.
*/
int cvmx_l2c_vrt_set_max_memsz(int memsz)
{
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
int decode = 0;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
if (l2c_vrt_ctl.s.enable) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_set_memsz: Changing the size of the memory after Virtualization is enabled is not allowed.\n");
return -1;
}
if (memsz >= (int)(cvmx_sysinfo_get()->system_dram_size / 1000000)) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_set_memsz: Invalid memory size (%d GB), greater than available on the chip\n",
memsz);
return -1;
}
decode = __cvmx_l2c_vrt_decode_memsize(memsz);
if (decode == -1) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_set_memsz: Invalid memory size (%d GB), refer to L2C_VRT_CTL[MEMSZ] for more information\n",
memsz);
return -1;
}
l2c_vrt_ctl.s.memsz = decode;
cvmx_write_csr(CVMX_L2C_VRT_CTL, l2c_vrt_ctl.u64);
return 0;
}
/**
* Set a Virtual ID to a set of cores.
*
* @param virtid Assign virtid to a set of cores.
* @param coremask The group of cores to assign a unique virtual id.
* @return Return 0 on success, otherwise -1.
*/
int cvmx_l2c_vrt_assign_virtid(int virtid, uint32_t coremask)
{
uint32_t core = 0;
int found = 0;
int max_virtid;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
max_virtid = cvmx_l2c_vrt_get_max_virtids();
if (virtid > max_virtid) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_assign_virt_id: Max %d number of virtids are allowed, passed %d.\n",
max_virtid, virtid);
return -1;
}
while (core < cvmx_octeon_num_cores()) {
if ((coremask >> core) & 1) {
cvmx_l2c_virtid_ppx_t l2c_virtid_ppx;
cvmx_l2c_virtid_iobx_t l2c_virtid_iobx;
l2c_virtid_ppx.u64 = cvmx_read_csr(CVMX_L2C_VIRTID_PPX(core));
/* Check if the core already has a virtid assigned. */
if (l2c_virtid_ppx.s.id) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_assign_virt_id: Changing virtid of core #%d to %d from %d.\n",
(unsigned int)core, virtid,
l2c_virtid_ppx.s.id);
/* Flush L2 cache to avoid write errors */
cvmx_l2c_flush();
}
cvmx_write_csr(CVMX_L2C_VIRTID_PPX(core), virtid & 0x3f);
/* Set the IOB to normal mode. */
l2c_virtid_iobx.u64 = cvmx_read_csr(CVMX_L2C_VIRTID_IOBX(core));
l2c_virtid_iobx.s.id = 1;
l2c_virtid_iobx.s.dwbid = 0;
cvmx_write_csr(CVMX_L2C_VIRTID_IOBX(core),
l2c_virtid_iobx.u64);
found = 1;
}
core++;
}
/* Invalid coremask passed. */
if (!found) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_assign_virt_id: Invalid coremask(0x%x) passed\n",
(unsigned int)coremask);
return -1;
}
return 0;
}
/**
* Remove a virt id assigned to a set of cores. Update the virtid mask and
* virtid stored for each core.
*
* @param virtid Remove the specified Virtualization machine ID.
*/
void cvmx_l2c_vrt_remove_virtid(int virtid)
{
uint32_t core;
cvmx_l2c_virtid_ppx_t l2c_virtid_ppx;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return;
for (core = 0; core < cvmx_octeon_num_cores(); core++) {
l2c_virtid_ppx.u64 = cvmx_read_csr(CVMX_L2C_VIRTID_PPX(core));
if (virtid == l2c_virtid_ppx.s.id)
cvmx_write_csr(CVMX_L2C_VIRTID_PPX(core), 0);
}
}
/**
* Helper function to protect the memory region based on the granularity.
*/
static uint64_t __cvmx_l2c_vrt_get_granularity(void)
{
uint64_t gran = 0;
if (OCTEON_IS_MODEL(OCTEON_CN6XXX) || OCTEON_IS_MODEL(OCTEON_CNF7XXX)) {
int nvid;
uint64_t szd;
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
nvid = cvmx_l2c_vrt_get_max_virtids();
szd = (1ull << l2c_vrt_ctl.s.memsz) * 1024 * 1024 * 1024;
gran = (unsigned long long)(szd * nvid)/(32ull * 1024);
}
return gran;
}
CVMX_SHARED cvmx_spinlock_t cvmx_l2c_vrt_spinlock;
/**
* Block a memory region to be updated for a given virtual id.
*
* @param start_addr Starting address of memory region
* @param size Size of the memory to protect
* @param virtid Virtual ID to use
* @param mode Allow/Disallow write access
* = 0, Allow write access by virtid
* = 1, Disallow write access by virtid
*/
int cvmx_l2c_vrt_memprotect(uint64_t start_addr, int size, int virtid, int mode)
{
uint64_t gran;
uint64_t end_addr;
int byte_offset, virtid_offset;
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
cvmx_l2c_vrt_memx_t l2c_vrt_mem;
cvmx_l2c_virtid_ppx_t l2c_virtid_ppx;
int found;
uint32_t core;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return -1;
/*
* Check the alignment of start address, should be aligned to the
* granularity.
*/
gran = __cvmx_l2c_vrt_get_granularity();
end_addr = start_addr + size;
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
/* No need to protect if virtualization is not enabled */
if (!l2c_vrt_ctl.s.enable) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_memprotect: Virtualization is not enabled.\n");
return -1;
}
if (virtid > cvmx_l2c_vrt_get_max_virtids()) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_memprotect: Virtualization id is greater than max allowed\n");
return -1;
}
/* No need to protect if virtid is not assigned to a core */
found = 0;
for (core = 0; core < cvmx_octeon_num_cores(); core++) {
l2c_virtid_ppx.u64 = cvmx_read_csr(CVMX_L2C_VIRTID_PPX(core));
if (l2c_virtid_ppx.s.id == virtid) {
found = 1;
break;
}
}
if (found == 0) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_memprotect: Virtualization id (%d) is not assigned to any core.\n",
virtid);
return -1;
}
/*
* Make sure previous stores are through before protecting the
* memory.
*/
CVMX_SYNCW;
/*
* If the L2/DRAM physical address is >= 512 MB, subtract 256
* MB to get the address to use. This is because L2C removes
* the 256MB "hole" between DR0 and DR1.
*/
if (start_addr >= (512 * 1024 * 1024))
start_addr -= 256 * 1024 * 1024;
if (start_addr != ((start_addr + (gran - 1)) & ~(gran - 1))) {
cvmx_dprintf("WARNING: cvmx_l2c_vrt_memprotect: Start address is not aligned\n");
return -1;
}
/*
* Check the size of the memory to protect, should be aligned
* to the granularity.
*/
if (end_addr != ((end_addr + (gran - 1)) & ~(gran - 1))) {
end_addr = (start_addr + (gran - 1)) & ~(gran - 1);
size = start_addr - end_addr;
}
byte_offset = l2c_vrt_ctl.s.memsz + l2c_vrt_ctl.s.numid + 16;
virtid_offset = 14 - l2c_vrt_ctl.s.numid;
cvmx_spinlock_lock(&cvmx_l2c_vrt_spinlock);
/* Enable memory protection for each virtid for the specified range. */
while (start_addr < end_addr) {
/*
* When L2C virtualization is enabled and a bit is set
* in L2C_VRT_MEM(0..1023), then L2C prevents the
* selected virtual machine from storing to the
* selected L2C/DRAM region.
*/
int offset, position, i;
int l2c_vrt_mem_bit_index = start_addr >> byte_offset;
l2c_vrt_mem_bit_index |= (virtid << virtid_offset);
offset = l2c_vrt_mem_bit_index >> 5;
position = l2c_vrt_mem_bit_index & 0x1f;
l2c_vrt_mem.u64 = cvmx_read_csr(CVMX_L2C_VRT_MEMX(offset));
/* Allow/Disallow write access to memory. */
if (mode == 0)
l2c_vrt_mem.s.data &= ~(1 << position);
else
l2c_vrt_mem.s.data |= 1 << position;
l2c_vrt_mem.s.parity = 0;
/* PARITY<i> is the even parity of DATA<i*8+7:i*8>, which means
* that each bit<i> in PARITY[0..3], is the XOR of all the bits
* in the corresponding byte in DATA.
*/
for (i = 0; i <= 4; i++) {
uint64_t mask = 0xffull << (i*8);
if ((cvmx_pop(l2c_vrt_mem.s.data & mask) & 0x1))
l2c_vrt_mem.s.parity |= (1ull << i);
}
cvmx_write_csr(CVMX_L2C_VRT_MEMX(offset), l2c_vrt_mem.u64);
start_addr += gran;
}
cvmx_spinlock_unlock(&cvmx_l2c_vrt_spinlock);
return 0;
}
/**
* Enable virtualization.
*
* @param mode Whether out of bound writes are an error.
*/
void cvmx_l2c_vrt_enable(int mode)
{
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return;
/* Enable global virtualization */
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
l2c_vrt_ctl.s.ooberr = mode;
l2c_vrt_ctl.s.enable = 1;
cvmx_write_csr(CVMX_L2C_VRT_CTL, l2c_vrt_ctl.u64);
}
/**
* Disable virtualization.
*/
void cvmx_l2c_vrt_disable(void)
{
cvmx_l2c_vrt_ctl_t l2c_vrt_ctl;
if (OCTEON_IS_MODEL(OCTEON_CN3XXX) || OCTEON_IS_MODEL(OCTEON_CN5XXX))
return;
/* Disable global virtualization */
l2c_vrt_ctl.u64 = cvmx_read_csr(CVMX_L2C_VRT_CTL);
l2c_vrt_ctl.s.enable = 0;
cvmx_write_csr(CVMX_L2C_VRT_CTL, l2c_vrt_ctl.u64);
}
#endif
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