+++ /dev/null
-/*
- * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-
-#include <kern/thread.h>
-#include <kern/ipc_tt.h>
-#include <ppc/exception.h>
-#include <ppc/savearea.h>
-#include <ppc/hw_perfmon.h>
-#include <ppc/hw_perfmon_mmcr.h>
-#include <ppc/trap.h>
-#include <mach/thread_act.h>
-
-decl_simple_lock_data(,hw_perfmon_lock)
-static task_t hw_perfmon_owner = TASK_NULL;
-static int hw_perfmon_thread_count = 0;
-
-/* Notes:
- * -supervisor/user level filtering is unnecessary because of the way PMCs and MMCRs are context switched
- * (can only count user events anyway)
- * -marked filtering is unnecssary because each thread has its own virtualized set of PMCs and MMCRs
- * -virtual counter PMI is passed up as a breakpoint exception
- */
-
-int perfmon_init(void)
-{
- simple_lock_init(&hw_perfmon_lock, FALSE);
- return KERN_SUCCESS;
-}
-
-/* PMC Facility Owner:
- * TASK_NULL - no one owns it
- * kernel_task - owned by hw_perfmon
- * other task - owned by another task
- */
-
-int perfmon_acquire_facility(task_t task)
-{
- kern_return_t retval = KERN_SUCCESS;
-
- simple_lock(&hw_perfmon_lock);
-
- if(hw_perfmon_owner==task) {
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_acquire_facility - ACQUIRED: already owner\n");
-#endif
- retval = KERN_SUCCESS;
- /* already own it */
- } else if(hw_perfmon_owner==TASK_NULL) { /* no one owns it */
- hw_perfmon_owner = task;
- hw_perfmon_thread_count = 0;
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_acquire_facility - ACQUIRED: no current owner - made new owner\n");
-#endif
- retval = KERN_SUCCESS;
- } else { /* someone already owns it */
- if(hw_perfmon_owner==kernel_task) {
- if(hw_perfmon_thread_count==0) { /* kernel owns it but no threads using it */
- hw_perfmon_owner = task;
- hw_perfmon_thread_count = 0;
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_acquire_facility - ACQUIRED: kernel is current owner but no threads using it\n");
-#endif
- retval = KERN_SUCCESS;
- } else {
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_acquire_facility - DENIED: kernel is current owner and facility in use\n");
-#endif
- retval = KERN_RESOURCE_SHORTAGE;
- }
- } else { /* non-kernel owner */
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_acquire_facility - DENIED: another active task owns the facility\n");
-#endif
- retval = KERN_RESOURCE_SHORTAGE;
- }
- }
-
- simple_unlock(&hw_perfmon_lock);
- return retval;
-}
-
-int perfmon_release_facility(task_t task)
-{
- kern_return_t retval = KERN_SUCCESS;
- task_t old_perfmon_owner = hw_perfmon_owner;
-
- simple_lock(&hw_perfmon_lock);
-
- if(task!=hw_perfmon_owner) {
- retval = KERN_NO_ACCESS;
- } else {
- if(old_perfmon_owner==kernel_task) {
- if(hw_perfmon_thread_count>0) {
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_release_facility - NOT RELEASED: kernel task is owner and has active perfmon threads\n");
-#endif
- retval = KERN_NO_ACCESS;
- } else {
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_release_facility - RELEASED: kernel task was owner\n");
-#endif
- hw_perfmon_owner = TASK_NULL;
- retval = KERN_SUCCESS;
- }
- } else {
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_release_facility - RELEASED: user task was owner\n");
-#endif
- hw_perfmon_owner = TASK_NULL;
- retval = KERN_SUCCESS;
- }
- }
-
- simple_unlock(&hw_perfmon_lock);
- return retval;
-}
-
-static int
-perfmon_enable(thread_t thread)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
- int curPMC;
-
- if(thread->machine.specFlags & perfMonitor) {
- return KERN_SUCCESS; /* already enabled */
- } else if(perfmon_acquire_facility(kernel_task)!=KERN_SUCCESS) {
- return KERN_RESOURCE_SHORTAGE; /* facility is in use */
- } else { /* kernel_task owns the faciltity and this thread has not yet been counted */
- simple_lock(&hw_perfmon_lock);
- hw_perfmon_thread_count++;
- simple_unlock(&hw_perfmon_lock);
- }
-
- sv->save_mmcr1 = 0;
- sv->save_mmcr2 = 0;
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = 0;
- mmcr0_reg.field.disable_counters_always = TRUE;
- mmcr0_reg.field.disable_counters_supervisor = TRUE; /* no choice */
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = 0;
- mmcr0_reg.field.disable_counters_always = TRUE;
- mmcr0_reg.field.disable_counters_supervisor = TRUE; /* no choice */
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
- if(retval==KERN_SUCCESS) {
- for(curPMC=0; curPMC<MAX_CPUPMC_COUNT; curPMC++) {
- sv->save_pmc[curPMC] = 0;
- thread->machine.pmcovfl[curPMC] = 0;
- }
- thread->machine.perfmonFlags = 0;
- thread->machine.specFlags |= perfMonitor; /* enable perf monitor facility for this thread */
- if(thread==current_thread()) {
- getPerProc()->spcFlags |= perfMonitor; /* update per_proc */
- }
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_enable - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return retval;
-}
-
-int perfmon_disable(thread_t thread)
-{
- struct savearea *sv = thread->machine.pcb;
- int curPMC;
-
- if(!(thread->machine.specFlags & perfMonitor)) {
- return KERN_NO_ACCESS; /* not enabled */
- } else {
- simple_lock(&hw_perfmon_lock);
- hw_perfmon_thread_count--;
- simple_unlock(&hw_perfmon_lock);
- perfmon_release_facility(kernel_task); /* will release if hw_perfmon_thread_count is 0 */
- }
-
- thread->machine.specFlags &= ~perfMonitor; /* disable perf monitor facility for this thread */
- if(thread==current_thread()) {
- PerProcTable[cpu_number()].ppe_vaddr->spcFlags &= ~perfMonitor; /* update per_proc */
- }
- sv->save_mmcr0 = 0;
- sv->save_mmcr1 = 0;
- sv->save_mmcr2 = 0;
-
- for(curPMC=0; curPMC<MAX_CPUPMC_COUNT; curPMC++) {
- sv->save_pmc[curPMC] = 0;
- thread->machine.pmcovfl[curPMC] = 0;
- thread->machine.perfmonFlags = 0;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_disable - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return KERN_SUCCESS;
-}
-
-static int
-perfmon_clear_counters(thread_t thread)
-{
- struct savearea *sv = thread->machine.pcb;
- int curPMC;
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_clear_counters (CPU%d)\n", cpu_number());
-#endif
-
- /* clear thread copy */
- for(curPMC=0; curPMC<MAX_CPUPMC_COUNT; curPMC++) {
- sv->save_pmc[curPMC] = 0;
- thread->machine.pmcovfl[curPMC] = 0;
- }
-
- return KERN_SUCCESS;
-}
-
-static int
-perfmon_write_counters(thread_t thread, uint64_t *pmcs)
-{
- struct savearea *sv = thread->machine.pcb;
- int curPMC;
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_write_counters (CPU%d): mmcr0 = %016llX, pmc1=%llX pmc2=%llX pmc3=%llX pmc4=%llX pmc5=%llX pmc6=%llX pmc7=%llX pmc8=%llX\n", cpu_number(), sv->save_mmcr0, pmcs[PMC_1], pmcs[PMC_2], pmcs[PMC_3], pmcs[PMC_4], pmcs[PMC_5], pmcs[PMC_6], pmcs[PMC_7], pmcs[PMC_8]);
-#endif
-
- /* update thread copy */
- for(curPMC=0; curPMC<MAX_CPUPMC_COUNT; curPMC++) {
- sv->save_pmc[curPMC] = pmcs[curPMC] & 0x7FFFFFFF;
- thread->machine.pmcovfl[curPMC] = (pmcs[curPMC]>>31) & 0xFFFFFFFF;
- }
-
- return KERN_SUCCESS;
-}
-
-static int
-perfmon_read_counters(thread_t thread, uint64_t *pmcs)
-{
- struct savearea *sv = thread->machine.pcb;
- int curPMC;
-
- /* retrieve from thread copy */
- for(curPMC=0; curPMC<MAX_CPUPMC_COUNT; curPMC++) {
- pmcs[curPMC] = thread->machine.pmcovfl[curPMC];
- pmcs[curPMC] = pmcs[curPMC]<<31;
- pmcs[curPMC] |= (sv->save_pmc[curPMC] & 0x7FFFFFFF);
- }
-
- /* zero any unused counters on this platform */
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- case CPU_SUBTYPE_POWERPC_7450:
- pmcs[PMC_7] = 0;
- pmcs[PMC_8] = 0;
- break;
- default:
- break;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_read_counters (CPU%d): mmcr0 = %016llX pmc1=%llX pmc2=%llX pmc3=%llX pmc4=%llX pmc5=%llX pmc6=%llX pmc7=%llX pmc8=%llX\n", cpu_number(), sv->save_mmcr0, pmcs[PMC_1], pmcs[PMC_2], pmcs[PMC_3], pmcs[PMC_4], pmcs[PMC_5], pmcs[PMC_6], pmcs[PMC_7], pmcs[PMC_8]);
-#endif
-
- return KERN_SUCCESS;
-}
-
-static int
-perfmon_start_counters(thread_t thread)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = FALSE;
- /* XXXXX PMI broken on 750, 750CX, 750FX, 7400 and 7410 v1.2 and earlier XXXXX */
- mmcr0_reg.field.on_pmi_stop_counting = FALSE;
- mmcr0_reg.field.enable_pmi = FALSE;
- mmcr0_reg.field.enable_pmi_on_pmc1 = FALSE;
- mmcr0_reg.field.enable_pmi_on_pmcn = FALSE;
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = FALSE;
- mmcr0_reg.field.on_pmi_stop_counting = TRUE;
- mmcr0_reg.field.enable_pmi = TRUE;
- mmcr0_reg.field.enable_pmi_on_pmc1 = TRUE;
- mmcr0_reg.field.enable_pmi_on_pmcn = TRUE;
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = FALSE;
- mmcr0_reg.field.on_pmi_stop_counting = TRUE;
- mmcr0_reg.field.enable_pmi = TRUE;
- mmcr0_reg.field.enable_pmi_on_pmc1 = TRUE;
- mmcr0_reg.field.enable_pmi_on_pmcn = TRUE;
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_start_counters (CPU%d) - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", cpu_number(), sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return retval;
-}
-
-static int
-perfmon_stop_counters(thread_t thread)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = TRUE;
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = TRUE;
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_stop_counters (CPU%d) - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", cpu_number(), sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return retval;
-}
-
-static int
-perfmon_set_event(thread_t thread, int pmc, int event)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_event b4 (CPU%d) - pmc=%d, event=%d - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", cpu_number(), pmc, event, sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
- ppc32_mmcr1_reg_t mmcr1_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr1_reg.value = sv->save_mmcr1;
-
- switch(pmc) {
- case PMC_1:
- mmcr0_reg.field.pmc1_event = event;
- sv->save_mmcr0 = mmcr0_reg.value;
- break;
- case PMC_2:
- mmcr0_reg.field.pmc2_event = event;
- sv->save_mmcr0 = mmcr0_reg.value;
- break;
- case PMC_3:
- mmcr1_reg.field.pmc3_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_4:
- mmcr1_reg.field.pmc4_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
- }
- break;
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
- ppc32_mmcr1_reg_t mmcr1_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr1_reg.value = sv->save_mmcr1;
-
- switch(pmc) {
- case PMC_1:
- mmcr0_reg.field.pmc1_event = event;
- sv->save_mmcr0 = mmcr0_reg.value;
- break;
- case PMC_2:
- mmcr0_reg.field.pmc2_event = event;
- sv->save_mmcr0 = mmcr0_reg.value;
- break;
- case PMC_3:
- mmcr1_reg.field.pmc3_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_4:
- mmcr1_reg.field.pmc4_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_5:
- mmcr1_reg.field.pmc5_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_6:
- mmcr1_reg.field.pmc6_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
- }
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
- ppc64_mmcr1_reg_t mmcr1_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr1_reg.value = sv->save_mmcr1;
-
- switch(pmc) {
- case PMC_1:
- mmcr0_reg.field.pmc1_event = event;
- sv->save_mmcr0 = mmcr0_reg.value;
- break;
- case PMC_2:
- mmcr0_reg.field.pmc2_event = event;
- sv->save_mmcr0 = mmcr0_reg.value;
- break;
- case PMC_3:
- mmcr1_reg.field.pmc3_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_4:
- mmcr1_reg.field.pmc4_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_5:
- mmcr1_reg.field.pmc5_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_6:
- mmcr1_reg.field.pmc6_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_7:
- mmcr1_reg.field.pmc7_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- case PMC_8:
- mmcr1_reg.field.pmc8_event = event;
- sv->save_mmcr1 = mmcr1_reg.value;
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_event (CPU%d) - pmc=%d, event=%d - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", cpu_number(), pmc, event, sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return retval;
-}
-
-static int
-perfmon_set_event_func(thread_t thread, uint32_t f)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_event_func - func=%s\n",
- f==PPC_PERFMON_FUNC_FPU ? "FUNC" :
- f==PPC_PERFMON_FUNC_ISU ? "ISU" :
- f==PPC_PERFMON_FUNC_IFU ? "IFU" :
- f==PPC_PERFMON_FUNC_VMX ? "VMX" :
- f==PPC_PERFMON_FUNC_IDU ? "IDU" :
- f==PPC_PERFMON_FUNC_GPS ? "GPS" :
- f==PPC_PERFMON_FUNC_LSU0 ? "LSU0" :
- f==PPC_PERFMON_FUNC_LSU1A ? "LSU1A" :
- f==PPC_PERFMON_FUNC_LSU1B ? "LSU1B" :
- f==PPC_PERFMON_FUNC_SPECA ? "SPECA" :
- f==PPC_PERFMON_FUNC_SPECB ? "SPECB" :
- f==PPC_PERFMON_FUNC_SPECC ? "SPECC" :
- "UNKNOWN");
-#endif /* HWPERFMON_DEBUG */
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- case CPU_SUBTYPE_POWERPC_7450:
- retval = KERN_FAILURE; /* event functional unit only applies to 970 */
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr1_reg_t mmcr1_reg;
- ppc_func_unit_t func_unit;
-
- func_unit.value = f;
- mmcr1_reg.value = sv->save_mmcr1;
-
- mmcr1_reg.field.ttm0_select = func_unit.field.TTM0SEL;
- mmcr1_reg.field.ttm1_select = func_unit.field.TTM1SEL;
- mmcr1_reg.field.ttm2_select = 0; /* not used */
- mmcr1_reg.field.ttm3_select = func_unit.field.TTM3SEL;
- mmcr1_reg.field.speculative_event = func_unit.field.SPECSEL;
- mmcr1_reg.field.lane0_select = func_unit.field.TD_CP_DBGxSEL;
- mmcr1_reg.field.lane1_select = func_unit.field.TD_CP_DBGxSEL;
- mmcr1_reg.field.lane2_select = func_unit.field.TD_CP_DBGxSEL;
- mmcr1_reg.field.lane3_select = func_unit.field.TD_CP_DBGxSEL;
-
- sv->save_mmcr1 = mmcr1_reg.value;
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
- return retval;
-}
-
-static int
-perfmon_set_threshold(thread_t thread, int threshold)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
-
- if(threshold>63) { /* no multiplier on 750 */
- int newThreshold = 63;
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_threshold - WARNING: supplied threshold (%d) exceeds max threshold value - clamping to %d\n", threshold, newThreshold);
-#endif
- threshold = newThreshold;
- }
- mmcr0_reg.field.threshold_value = threshold;
-
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
-
- case CPU_SUBTYPE_POWERPC_7400:
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
- ppc32_mmcr2_reg_t mmcr2_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
- mmcr2_reg.value = sv->save_mmcr2;
-
- if(threshold<=(2*63)) { /* 2x multiplier */
- if(threshold%2 != 0) {
- int newThreshold = 2*(threshold/2);
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_threshold - WARNING: supplied threshold (%d) is not evenly divisible by 2x multiplier - using threshold of %d instead\n", threshold, newThreshold);
-#endif
- threshold = newThreshold;
- }
- mmcr2_reg.field.threshold_multiplier = 0;
- } else if(threshold<=(32*63)) { /* 32x multiplier */
- if(threshold%32 != 0) {
- int newThreshold = 32*(threshold/32);
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_threshold - WARNING: supplied threshold (%d) is not evenly divisible by 32x multiplier - using threshold of %d instead\n", threshold, newThreshold);
-#endif
- threshold = newThreshold;
- }
- mmcr2_reg.field.threshold_multiplier = 1;
- } else {
- int newThreshold = 32*63;
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_threshold - WARNING: supplied threshold (%d) exceeds max threshold value - clamping to %d\n", threshold, newThreshold);
-#endif
- threshold = newThreshold;
- mmcr2_reg.field.threshold_multiplier = 1;
- }
- mmcr0_reg.field.threshold_value = threshold;
-
- sv->save_mmcr0 = mmcr0_reg.value;
- sv->save_mmcr2 = mmcr2_reg.value;
-
- }
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
-
- if(threshold>63) { /* multiplier is in HID1 on 970 - not context switching HID1 so always 1x */
- int newThreshold = 63;
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_threshold - WARNING: supplied threshold (%d) exceeds max threshold value - clamping to %d\n", threshold, newThreshold);
-#endif
- threshold = newThreshold;
- }
- mmcr0_reg.field.threshold_value = threshold;
-
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_threshold - threshold=%d - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", threshold, sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return retval;
-}
-
-static int
-perfmon_set_tbsel(thread_t thread, int tbsel)
-{
- struct savearea *sv = thread->machine.pcb;
- kern_return_t retval = KERN_SUCCESS;
-
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_750:
- case CPU_SUBTYPE_POWERPC_7400:
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
- switch(tbsel) {
- case 0x0:
- case 0x1:
- case 0x2:
- case 0x3:
- mmcr0_reg.field.timebase_bit_selector = tbsel;
- break;
- default:
- retval = KERN_FAILURE;
- }
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = sv->save_mmcr0;
- switch(tbsel) {
- case 0x0:
- case 0x1:
- case 0x2:
- case 0x3:
- mmcr0_reg.field.timebase_bit_selector = tbsel;
- break;
- default:
- retval = KERN_FAILURE;
- }
- sv->save_mmcr0 = mmcr0_reg.value;
- }
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_set_tbsel - tbsel=%d - mmcr0=0x%llx mmcr1=0x%llx mmcr2=0x%llx\n", tbsel, sv->save_mmcr0, sv->save_mmcr1, sv->save_mmcr2);
-#endif
-
- return retval;
-}
-
-int perfmon_control(struct savearea *ssp)
-{
- mach_port_name_t thr_port = CAST_DOWN(mach_port_name_t, ssp->save_r3);
- int action = (int)ssp->save_r4;
- int pmc = (int)ssp->save_r5;
- int val = (int)ssp->save_r6;
- uint64_t *usr_pmcs_p = CAST_DOWN(uint64_t *, ssp->save_r7);
- thread_t thread = THREAD_NULL;
- uint64_t kern_pmcs[MAX_CPUPMC_COUNT];
- kern_return_t retval = KERN_SUCCESS;
- int error;
- boolean_t oldlevel;
-
- thread = port_name_to_thread(thr_port); // convert user space thread port name to a thread_t
- if(!thread) {
- ssp->save_r3 = KERN_INVALID_ARGUMENT;
- return 1; /* Return and check for ASTs... */
- }
-
- if(thread!=current_thread()) {
- thread_suspend(thread);
- }
-
-#ifdef HWPERFMON_DEBUG
- // kprintf("perfmon_control: action=0x%x pmc=%d val=%d pmcs=0x%x\n", action, pmc, val, usr_pmcs_p);
-#endif
-
- oldlevel = ml_set_interrupts_enabled(FALSE);
-
- /* individual actions which do not require perfmon facility to be enabled */
- if(action==PPC_PERFMON_DISABLE) {
- retval = perfmon_disable(thread);
- }
- else if(action==PPC_PERFMON_ENABLE) {
- retval = perfmon_enable(thread);
- }
-
- else { /* individual actions which do require perfmon facility to be enabled */
- if(!(thread->machine.specFlags & perfMonitor)) { /* perfmon not enabled */
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_control: ERROR - perfmon not enabled for this thread\n");
-#endif
- retval = KERN_NO_ACCESS;
- goto perfmon_return;
- }
-
- if(action==PPC_PERFMON_SET_EVENT) {
- retval = perfmon_set_event(thread, pmc, val);
- }
- else if(action==PPC_PERFMON_SET_THRESHOLD) {
- retval = perfmon_set_threshold(thread, val);
- }
- else if(action==PPC_PERFMON_SET_TBSEL) {
- retval = perfmon_set_tbsel(thread, val);
- }
- else if(action==PPC_PERFMON_SET_EVENT_FUNC) {
- retval = perfmon_set_event_func(thread, val);
- }
- else if(action==PPC_PERFMON_ENABLE_PMI_BRKPT) {
- if(val) {
- thread->machine.perfmonFlags |= PERFMONFLAG_BREAKPOINT_FOR_PMI;
- } else {
- thread->machine.perfmonFlags &= ~PERFMONFLAG_BREAKPOINT_FOR_PMI;
- }
- retval = KERN_SUCCESS;
- }
-
- /* combinable actions */
- else {
- if(action & PPC_PERFMON_STOP_COUNTERS) {
- error = perfmon_stop_counters(thread);
- if(error!=KERN_SUCCESS) {
- retval = error;
- goto perfmon_return;
- }
- }
- if(action & PPC_PERFMON_CLEAR_COUNTERS) {
- error = perfmon_clear_counters(thread);
- if(error!=KERN_SUCCESS) {
- retval = error;
- goto perfmon_return;
- }
- }
- if(action & PPC_PERFMON_WRITE_COUNTERS) {
- if((error = copyin(CAST_USER_ADDR_T(usr_pmcs_p), (void *)kern_pmcs, MAX_CPUPMC_COUNT*sizeof(uint64_t)))) {
- retval = error;
- goto perfmon_return;
- }
- error = perfmon_write_counters(thread, kern_pmcs);
- if(error!=KERN_SUCCESS) {
- retval = error;
- goto perfmon_return;
- }
- }
- if(action & PPC_PERFMON_READ_COUNTERS) {
- error = perfmon_read_counters(thread, kern_pmcs);
- if(error!=KERN_SUCCESS) {
- retval = error;
- goto perfmon_return;
- }
- if((error = copyout((void *)kern_pmcs, CAST_USER_ADDR_T(usr_pmcs_p), MAX_CPUPMC_COUNT*sizeof(uint64_t)))) {
- retval = error;
- goto perfmon_return;
- }
- }
- if(action & PPC_PERFMON_START_COUNTERS) {
- error = perfmon_start_counters(thread);
- if(error!=KERN_SUCCESS) {
- retval = error;
- goto perfmon_return;
- }
- }
- }
- }
-
- perfmon_return:
- ml_set_interrupts_enabled(oldlevel);
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_control (CPU%d): mmcr0 = %016llX, pmc1=%X pmc2=%X pmc3=%X pmc4=%X pmc5=%X pmc6=%X pmc7=%X pmc8=%X\n", cpu_number(), ssp->save_mmcr0, ssp->save_pmc[PMC_1], ssp->save_pmc[PMC_2], ssp->save_pmc[PMC_3], ssp->save_pmc[PMC_4], ssp->save_pmc[PMC_5], ssp->save_pmc[PMC_6], ssp->save_pmc[PMC_7], ssp->save_pmc[PMC_8]);
-#endif
-
- if(thread!=current_thread()) {
- thread_resume(thread);
- }
-
-#ifdef HWPERFMON_DEBUG
- if(retval!=KERN_SUCCESS) {
- kprintf("perfmon_control - ERROR: retval=%d\n", retval);
- }
-#endif /* HWPERFMON_DEBUG */
-
- ssp->save_r3 = retval;
- return 1; /* Return and check for ASTs... */
-}
-
-int perfmon_handle_pmi(struct savearea *ssp)
-{
- int curPMC;
- kern_return_t retval = KERN_SUCCESS;
- thread_t thread = current_thread();
-
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_handle_pmi: got rupt\n");
-#endif
-
- if(!(thread->machine.specFlags & perfMonitor)) { /* perfmon not enabled */
-#ifdef HWPERFMON_DEBUG
- kprintf("perfmon_handle_pmi: ERROR - perfmon not enabled for this thread\n");
-#endif
- return KERN_FAILURE;
- }
-
- for(curPMC=0; curPMC<MAX_CPUPMC_COUNT; curPMC++) {
- if(thread->machine.pcb->save_pmc[curPMC] & 0x80000000) {
- if(thread->machine.pmcovfl[curPMC]==0xFFFFFFFF && (thread->machine.perfmonFlags & PERFMONFLAG_BREAKPOINT_FOR_PMI)) {
- doexception(EXC_BREAKPOINT, EXC_PPC_PERFMON, (unsigned int)ssp->save_srr0); // pass up a breakpoint exception
- return KERN_SUCCESS;
- } else {
- thread->machine.pmcovfl[curPMC]++;
- thread->machine.pcb->save_pmc[curPMC] = 0;
- }
- }
- }
-
- if(retval==KERN_SUCCESS) {
- switch(PerProcTable[0].ppe_vaddr->cpu_subtype) {
- case CPU_SUBTYPE_POWERPC_7450:
- {
- ppc32_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = thread->machine.pcb->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = FALSE;
- mmcr0_reg.field.enable_pmi = TRUE;
- thread->machine.pcb->save_mmcr0 = mmcr0_reg.value;
- }
- retval = KERN_SUCCESS;
- break;
- case CPU_SUBTYPE_POWERPC_970:
- {
- ppc64_mmcr0_reg_t mmcr0_reg;
-
- mmcr0_reg.value = thread->machine.pcb->save_mmcr0;
- mmcr0_reg.field.disable_counters_always = FALSE;
- mmcr0_reg.field.enable_pmi = TRUE;
- thread->machine.pcb->save_mmcr0 = mmcr0_reg.value;
- }
- retval = KERN_SUCCESS;
- break;
- default:
- retval = KERN_FAILURE;
- break;
- }
- }
-
- return retval;
-}
projects / apple / xnu.git / blobdiff