static NvError Ap15CorePerfMonStop(
NvU32* pCountListSize,
NvU32* pCountList,
NvU32* pTotalCycleCount)
{
NvU32 ccnt, pmn0, pmn1;
// Disable monotors and check status
NvError err = Ap15CorePerfMonCheckStatus();
Ap15CorePerfMonDisable();
if (err != NvSuccess)
return err;
// Read back cycle and event counters
MRC(p15, 0, ccnt, c15, c12, 1);
MRC(p15, 0, pmn0, c15, c12, 2);
MRC(p15, 0, pmn1, c15, c12, 3);
// Return total cycle count always, and event counts depending on
// the room provided by the caller
*pTotalCycleCount = ccnt;
if (*pCountListSize == 0)
return NvSuccess;
pCountList[0] = pmn1; // ARM spec Event0 <=> Counter 1 (not a typo)
if (*pCountListSize >= NVRM_AP15_MONITORED_EVENTS_MAX)
{
pCountList[1] = pmn0; // ARM spec Event1 <=> Counter 0 (not a typo)
*pCountListSize = NVRM_AP15_MONITORED_EVENTS_MAX;
}
return NvSuccess;
}
void
armv_init_user_access(void)
{
uint32_t v;
/* Performance Monitoring Unit */
MRC(ID_DFR0, v);
if ((v & ID_DFR0_PMU_MASK) != ID_DFR0_PMU_NONE) {
check_export_pmu();
}
/* Arch timers */
MRC(ID_PFR1, v);
if (v & ID_PFR1_GENERIC_TIMER) {
check_export_arch_timer();
}
}
static void
check_export_arch_timer(void)
{
uint32_t v;
MRC(CNTKCTL, v);
#ifdef CONFIG_EXPORT_PCNT_USER
v |= CNTKCTL_PL0PCTEN;
#endif
#ifdef CONFIG_EXPORT_VCNT_USER
v |= CNTKCTL_PL0VCTEN;
#endif
MCR(CNTKCTL, v);
}
static NvError Ap15CorePerfMonCheckStatus(void)
{
// Check if performance counters are enabled and no overflow has occurred
NvU32 RegValue;
MRC(p15, 0, RegValue, c15, c12, 0);
if ((NV_DRF_VAL(AP15_CP15, PMNC, ENABLE, RegValue) == 0) ||
(NV_DRF_VAL(AP15_CP15, PMNC, CYCLE_CNT_OV, RegValue) == 1) ||
(NV_DRF_VAL(AP15_CP15, PMNC, EVENT0_CNT_OV, RegValue) == 1) ||
(NV_DRF_VAL(AP15_CP15, PMNC, EVENT1_CNT_OV, RegValue) == 1))
return NvError_InvalidState;
else
return NvSuccess;
}
static void
check_export_pmu(void)
{
#ifdef CONFIG_EXPORT_PMU_USER
/* Export performance counters */
uint32_t v;
v = PMUSERENR_ENABLE;
MCR(PMUSERENR, v);
/* enable user-level pmu event counter if we're in secure mode */
if (!(readDscrCp() & DBGDSCR_SECURE_MODE_DISABLED)) {
MRC(DBGSDER, v);
v |= DBGSDER_ENABLE_SECURE_USER_NON_INVASIVE_DEBUG;
MCR(DBGSDER, v);
}
#endif
}
MRC::MRC(const char *filename, const char *mode)
{
MRC();
open(filename,mode);
}
