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freebsd-nq/sys/contrib/octeon-sdk/cvmx-l2c.c
Juli Mallett dc4ee6ca91 Merge the Cavium Octeon SDK 2.3.0 Simple Executive code and update FreeBSD to 
make use of it where possible.

This primarily brings in support for newer hardware, and FreeBSD is not yet
able to support the abundance of IRQs on new hardware and many features in the
Ethernet driver.

Because of the changes to IRQs in the Simple Executive, we have to maintain our
own list of Octeon IRQs now, which probably can be pared-down and be specific
to the CIU interrupt unit soon, and when other interrupt mechanisms are added
they can maintain their own definitions.

Remove unmasking of interrupts from within the UART device now that the
function used is no longer present in the Simple Executive.  The unmasking
seems to have been gratuitous as this is more properly handled by the buses
above the UART device, and seems to work on that basis.
2012-03-11 06:17:49 +00:00

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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;
/*
* 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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