diff options
Diffstat (limited to 'arch/i386/oprofile/op_model_ppro.c')
| -rw-r--r-- | arch/i386/oprofile/op_model_ppro.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/arch/i386/oprofile/op_model_ppro.c b/arch/i386/oprofile/op_model_ppro.c deleted file mode 100644 index c554f52cb808..000000000000 --- a/arch/i386/oprofile/op_model_ppro.c +++ /dev/null @@ -1,192 +0,0 @@ -/** - * @file op_model_ppro.h - * pentium pro / P6 model-specific MSR operations - * - * @remark Copyright 2002 OProfile authors - * @remark Read the file COPYING - * - * @author John Levon - * @author Philippe Elie - * @author Graydon Hoare - */ - -#include <linux/oprofile.h> -#include <asm/ptrace.h> -#include <asm/msr.h> -#include <asm/apic.h> -#include <asm/nmi.h> - -#include "op_x86_model.h" -#include "op_counter.h" - -#define NUM_COUNTERS 2 -#define NUM_CONTROLS 2 - -#define CTR_IS_RESERVED(msrs,c) (msrs->counters[(c)].addr ? 1 : 0) -#define CTR_READ(l,h,msrs,c) do {rdmsr(msrs->counters[(c)].addr, (l), (h));} while (0) -#define CTR_32BIT_WRITE(l,msrs,c) \ - do {wrmsr(msrs->counters[(c)].addr, -(u32)(l), 0);} while (0) -#define CTR_OVERFLOWED(n) (!((n) & (1U<<31))) - -#define CTRL_IS_RESERVED(msrs,c) (msrs->controls[(c)].addr ? 1 : 0) -#define CTRL_READ(l,h,msrs,c) do {rdmsr((msrs->controls[(c)].addr), (l), (h));} while (0) -#define CTRL_WRITE(l,h,msrs,c) do {wrmsr((msrs->controls[(c)].addr), (l), (h));} while (0) -#define CTRL_SET_ACTIVE(n) (n |= (1<<22)) -#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22)) -#define CTRL_CLEAR(x) (x &= (1<<21)) -#define CTRL_SET_ENABLE(val) (val |= 1<<20) -#define CTRL_SET_USR(val,u) (val |= ((u & 1) << 16)) -#define CTRL_SET_KERN(val,k) (val |= ((k & 1) << 17)) -#define CTRL_SET_UM(val, m) (val |= (m << 8)) -#define CTRL_SET_EVENT(val, e) (val |= e) - -static unsigned long reset_value[NUM_COUNTERS]; - -static void ppro_fill_in_addresses(struct op_msrs * const msrs) -{ - int i; - - for (i=0; i < NUM_COUNTERS; i++) { - if (reserve_perfctr_nmi(MSR_P6_PERFCTR0 + i)) - msrs->counters[i].addr = MSR_P6_PERFCTR0 + i; - else - msrs->counters[i].addr = 0; - } - - for (i=0; i < NUM_CONTROLS; i++) { - if (reserve_evntsel_nmi(MSR_P6_EVNTSEL0 + i)) - msrs->controls[i].addr = MSR_P6_EVNTSEL0 + i; - else - msrs->controls[i].addr = 0; - } -} - - -static void ppro_setup_ctrs(struct op_msrs const * const msrs) -{ - unsigned int low, high; - int i; - - /* clear all counters */ - for (i = 0 ; i < NUM_CONTROLS; ++i) { - if (unlikely(!CTRL_IS_RESERVED(msrs,i))) - continue; - CTRL_READ(low, high, msrs, i); - CTRL_CLEAR(low); - CTRL_WRITE(low, high, msrs, i); - } - - /* avoid a false detection of ctr overflows in NMI handler */ - for (i = 0; i < NUM_COUNTERS; ++i) { - if (unlikely(!CTR_IS_RESERVED(msrs,i))) - continue; - CTR_32BIT_WRITE(1, msrs, i); - } - - /* enable active counters */ - for (i = 0; i < NUM_COUNTERS; ++i) { - if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs,i))) { - reset_value[i] = counter_config[i].count; - - CTR_32BIT_WRITE(counter_config[i].count, msrs, i); - - CTRL_READ(low, high, msrs, i); - CTRL_CLEAR(low); - CTRL_SET_ENABLE(low); - CTRL_SET_USR(low, counter_config[i].user); - CTRL_SET_KERN(low, counter_config[i].kernel); - CTRL_SET_UM(low, counter_config[i].unit_mask); - CTRL_SET_EVENT(low, counter_config[i].event); - CTRL_WRITE(low, high, msrs, i); - } else { - reset_value[i] = 0; - } - } -} - - -static int ppro_check_ctrs(struct pt_regs * const regs, - struct op_msrs const * const msrs) -{ - unsigned int low, high; - int i; - - for (i = 0 ; i < NUM_COUNTERS; ++i) { - if (!reset_value[i]) - continue; - CTR_READ(low, high, msrs, i); - if (CTR_OVERFLOWED(low)) { - oprofile_add_sample(regs, i); - CTR_32BIT_WRITE(reset_value[i], msrs, i); - } - } - - /* Only P6 based Pentium M need to re-unmask the apic vector but it - * doesn't hurt other P6 variant */ - apic_write(APIC_LVTPC, apic_read(APIC_LVTPC) & ~APIC_LVT_MASKED); - - /* We can't work out if we really handled an interrupt. We - * might have caught a *second* counter just after overflowing - * the interrupt for this counter then arrives - * and we don't find a counter that's overflowed, so we - * would return 0 and get dazed + confused. Instead we always - * assume we found an overflow. This sucks. - */ - return 1; -} - - -static void ppro_start(struct op_msrs const * const msrs) -{ - unsigned int low,high; - int i; - - for (i = 0; i < NUM_COUNTERS; ++i) { - if (reset_value[i]) { - CTRL_READ(low, high, msrs, i); - CTRL_SET_ACTIVE(low); - CTRL_WRITE(low, high, msrs, i); - } - } -} - - -static void ppro_stop(struct op_msrs const * const msrs) -{ - unsigned int low,high; - int i; - - for (i = 0; i < NUM_COUNTERS; ++i) { - if (!reset_value[i]) - continue; - CTRL_READ(low, high, msrs, i); - CTRL_SET_INACTIVE(low); - CTRL_WRITE(low, high, msrs, i); - } -} - -static void ppro_shutdown(struct op_msrs const * const msrs) -{ - int i; - - for (i = 0 ; i < NUM_COUNTERS ; ++i) { - if (CTR_IS_RESERVED(msrs,i)) - release_perfctr_nmi(MSR_P6_PERFCTR0 + i); - } - for (i = 0 ; i < NUM_CONTROLS ; ++i) { - if (CTRL_IS_RESERVED(msrs,i)) - release_evntsel_nmi(MSR_P6_EVNTSEL0 + i); - } -} - - -struct op_x86_model_spec const op_ppro_spec = { - .num_counters = NUM_COUNTERS, - .num_controls = NUM_CONTROLS, - .fill_in_addresses = &ppro_fill_in_addresses, - .setup_ctrs = &ppro_setup_ctrs, - .check_ctrs = &ppro_check_ctrs, - .start = &ppro_start, - .stop = &ppro_stop, - .shutdown = &ppro_shutdown -}; |
