/*
* pfmlib_mips.c : support for MIPS chips
*
* Copyright (c) 2011 Samara Technology Group, Inc
* Contributed by Philip Mucci <phil.mucci@@samaratechnologygroup.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
/* private headers */
#include "pfmlib_priv.h" /* library private */
#include "pfmlib_mips_priv.h"
pfm_mips_config_t pfm_mips_cfg;
static const pfmlib_attr_desc_t mips_mods[]={
PFM_ATTR_B("k", "monitor at system level"),
PFM_ATTR_B("u", "monitor at user level"),
PFM_ATTR_B("s", "monitor at supervisor level"),
PFM_ATTR_B("e", "monitor at exception level "),
PFM_ATTR_NULL /* end-marker to avoid exporting number of entries */
};
#ifdef CONFIG_PFMLIB_OS_LINUX
/*
* helper function to retrieve one value from /proc/cpuinfo
* for internal libpfm use only
* attr: the attribute (line) to look for
* ret_buf: a buffer to store the value of the attribute (as a string)
* maxlen : number of bytes of capacity in ret_buf
*
* ret_buf is null terminated.
*
* Return:
* 0 : attribute found, ret_buf populated
* -1: attribute not found
*/
static int
pfmlib_getcpuinfo_attr(const char *attr, char *ret_buf, size_t maxlen)
{
FILE *fp = NULL;
int ret = -1;
size_t attr_len, buf_len = 0;
char *p, *value = NULL;
char *buffer = NULL;
if (attr == NULL || ret_buf == NULL || maxlen < 1)
return -1;
attr_len = strlen(attr);
fp = fopen("/proc/cpuinfo", "r");
if (fp == NULL)
return -1;
while(pfmlib_getl(&buffer, &buf_len, fp) != -1){
/* skip blank lines */
if (*buffer == '\n')
continue;
p = strchr(buffer, ':');
if (p == NULL)
goto error;
/*
* p+2: +1 = space, +2= firt character
* strlen()-1 gets rid of \n
*/
*p = '\0';
value = p+2;
value[strlen(value)-1] = '\0';
if (!strncmp(attr, buffer, attr_len))
break;
}
strncpy(ret_buf, value, maxlen-1);
ret_buf[maxlen-1] = '\0';
ret = 0;
error:
free(buffer);
fclose(fp);
return ret;
}
#else
static int
pfmlib_getcpuinfo_attr(const char *attr, char *ret_buf, size_t maxlen)
{
DPRINT("/proc/cpuinfo ignored\n");
}
#endif
static void
pfm_mips_display_reg(pfm_mips_sel_reg_t reg, uint64_t cntrs, char *fstr)
{
__pfm_vbprintf("[0x%"PRIx64" mask=0x%x usr=%d sys=%d sup=%d int=%d cntrs=0x%"PRIx64"] %s\n",
reg.val,
reg.perfsel64.sel_event_mask,
reg.perfsel64.sel_usr,
reg.perfsel64.sel_os,
reg.perfsel64.sel_sup,
reg.perfsel64.sel_exl,
cntrs,
fstr);
}
int
pfm_mips_detect(void *this)
{
int ret;
char buffer[1024];
DPRINT("mips_detect\n");
ret = pfmlib_getcpuinfo_attr("cpu model", buffer, sizeof(buffer));
if (ret == -1)
return PFM_ERR_NOTSUPP;
if (strstr(buffer,"MIPS") == NULL)
return PFM_ERR_NOTSUPP;
strncpy(pfm_mips_cfg.model,buffer,strlen(buffer));
/* ret = pfmlib_getcpuinfo_attr("CPU implementer", buffer, sizeof(buffer));
if (ret == -1)
return PFM_ERR_NOTSUPP;
pfm_mips_cfg.implementer = strtol(buffer, NULL, 16);
ret = pfmlib_getcpuinfo_attr("CPU part", buffer, sizeof(buffer));
if (ret == -1)
return PFM_ERR_NOTSUPP;
pfm_mips_cfg.part = strtol(buffer, NULL, 16);
ret = pfmlib_getcpuinfo_attr("CPU architecture", buffer, sizeof(buffer));
if (ret == -1)
return PFM_ERR_NOTSUPP;
pfm_mips_cfg.architecture = strtol(buffer, NULL, 16); */
return PFM_SUCCESS;
}
int
pfm_mips_get_encoding(void *this, pfmlib_event_desc_t *e)
{
pfmlib_pmu_t *pmu = this;
const mips_entry_t *pe = this_pe(this);
pfmlib_event_attr_info_t *a;
pfm_mips_sel_reg_t reg;
uint64_t ival, cntmask = 0;
int plmmsk = 0, code;
int k, id;
reg.val = 0;
code = pe[e->event].code;
/* truncates bit 7 (counter info) */
reg.perfsel64.sel_event_mask = code;
for (k = 0; k < e->nattrs; k++) {
a = attr(e, k);
if (a->ctrl != PFM_ATTR_CTRL_PMU)
continue;
ival = e->attrs[k].ival;
switch(a->idx) {
case MIPS_ATTR_K: /* os */
reg.perfsel64.sel_os = !!ival;
plmmsk |= _MIPS_ATTR_K;
break;
case MIPS_ATTR_U: /* user */
reg.perfsel64.sel_usr = !!ival;
plmmsk |= _MIPS_ATTR_U;
break;
case MIPS_ATTR_S: /* supervisor */
reg.perfsel64.sel_sup = !!ival;
plmmsk |= _MIPS_ATTR_S;
break;
case MIPS_ATTR_E: /* int */
reg.perfsel64.sel_exl = !!ival;
plmmsk |= _MIPS_ATTR_E;
}
}
/*
* handle case where no priv level mask was passed.
* then we use the dfl_plm
*/
if (!(plmmsk & MIPS_PLM_ALL)) {
if (e->dfl_plm & PFM_PLM0)
reg.perfsel64.sel_os = 1;
if (e->dfl_plm & PFM_PLM1)
reg.perfsel64.sel_sup = 1;
if (e->dfl_plm & PFM_PLM2)
reg.perfsel64.sel_exl = 1;
if (e->dfl_plm & PFM_PLM3)
reg.perfsel64.sel_usr = 1;
}
evt_strcat(e->fstr, "%s", pe[e->event].name);
for (k = 0; k < e->npattrs; k++) {
if (e->pattrs[k].ctrl != PFM_ATTR_CTRL_PMU)
continue;
id = e->pattrs[k].idx;
switch(id) {
case MIPS_ATTR_K:
evt_strcat(e->fstr, ":%s=%lu", mips_mods[id].name, reg.perfsel64.sel_os);
break;
case MIPS_ATTR_U:
evt_strcat(e->fstr, ":%s=%lu", mips_mods[id].name, reg.perfsel64.sel_usr);
break;
case MIPS_ATTR_S:
evt_strcat(e->fstr, ":%s=%lu", mips_mods[id].name, reg.perfsel64.sel_sup);
break;
case MIPS_ATTR_E:
evt_strcat(e->fstr, ":%s=%lu", mips_mods[id].name, reg.perfsel64.sel_exl);
break;
}
}
e->codes[0] = reg.val;
/* cycles and instructions support all counters */
if (code == 0 || code == 1) {
cntmask = (1ULL << pmu->num_cntrs) -1;
} else {
/* event work on odd counters only */
for (k = !!(code & 0x80) ; k < pmu->num_cntrs; k+=2) {
cntmask |= 1ULL << k;
}
}
e->codes[1] = cntmask;
e->count = 2;
pfm_mips_display_reg(reg, cntmask, e->fstr);
return PFM_SUCCESS;
}
int
pfm_mips_get_event_first(void *this)
{
return 0;
}
int
pfm_mips_get_event_next(void *this, int idx)
{
pfmlib_pmu_t *p = this;
if (idx >= (p->pme_count-1))
return -1;
return idx+1;
}
int
pfm_mips_event_is_valid(void *this, int pidx)
{
pfmlib_pmu_t *p = this;
return pidx >= 0 && pidx < p->pme_count;
}
int
pfm_mips_validate_table(void *this, FILE *fp)
{
pfmlib_pmu_t *pmu = this;
const mips_entry_t *pe = this_pe(this);
int i, j, error = 0;
for(i=0; i < pmu->pme_count; i++) {
if (!pe[i].name) {
fprintf(fp, "pmu: %s event%d: :: no name (prev event was %s)\n", pmu->name, i,
i > 1 ? pe[i-1].name : "??");
error++;
}
if (!pe[i].desc) {
fprintf(fp, "pmu: %s event%d: %s :: no description\n", pmu->name, i, pe[i].name);
error++;
}
for (j=i+1; j < pmu->pme_count; j++) {
if (pe[i].code == pe[j].code) {
fprintf(fp, "pmu: %s events %s and %s have the same code 0x%x\n", pmu->name, pe[i].name, pe[j].name, pe[i].code);
error++;
}
}
}
if (!pmu->supported_plm) {
fprintf(fp, "pmu: %s supported_plm=0, is that right?\n", pmu->name);
error++;
}
return error ? PFM_ERR_INVAL : PFM_SUCCESS;
}
unsigned int
pfm_mips_get_event_nattrs(void *this, int pidx)
{
/* assume all pmus have the same number of attributes */
return MIPS_NUM_ATTRS;
}
int
pfm_mips_get_event_attr_info(void *this, int pidx, int attr_idx, pfmlib_event_attr_info_t *info)
{
/* no umasks, so all attrs are modifiers */
info->name = mips_mods[attr_idx].name;
info->desc = mips_mods[attr_idx].desc;
info->type = mips_mods[attr_idx].type;
info->type = mips_mods[attr_idx].type;
info->equiv= NULL;
info->idx = attr_idx; /* private index */
info->code = attr_idx;
info->is_dfl = 0;
info->is_precise = 0;
info->ctrl = PFM_ATTR_CTRL_PMU;;
return PFM_SUCCESS;
}
int
pfm_mips_get_event_info(void *this, int idx, pfm_event_info_t *info)
{
pfmlib_pmu_t *pmu = this;
const mips_entry_t *pe = this_pe(this);
info->name = pe[idx].name;
info->desc = pe[idx].desc;
info->code = pe[idx].code;
info->equiv = NULL;
info->idx = idx; /* private index */
info->pmu = pmu->pmu;
info->is_precise = 0;
/* no attributes defined for MIPS yet */
info->nattrs = pfm_mips_get_event_nattrs(this, idx);
return PFM_SUCCESS;
}