diff options
Diffstat (limited to 'arch/avr32/oprofile/op_model_avr32.c')
| -rw-r--r-- | arch/avr32/oprofile/op_model_avr32.c | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/arch/avr32/oprofile/op_model_avr32.c b/arch/avr32/oprofile/op_model_avr32.c deleted file mode 100644 index 08308be2c02c..000000000000 --- a/arch/avr32/oprofile/op_model_avr32.c +++ /dev/null @@ -1,236 +0,0 @@ -/* - * AVR32 Performance Counter Driver - * - * Copyright (C) 2005-2007 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Author: Ronny Pedersen - */ -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/oprofile.h> -#include <linux/sched.h> -#include <linux/types.h> - -#include <asm/sysreg.h> - -#define AVR32_PERFCTR_IRQ_GROUP 0 -#define AVR32_PERFCTR_IRQ_LINE 1 - -void avr32_backtrace(struct pt_regs * const regs, unsigned int depth); - -enum { PCCNT, PCNT0, PCNT1, NR_counter }; - -struct avr32_perf_counter { - unsigned long enabled; - unsigned long event; - unsigned long count; - unsigned long unit_mask; - unsigned long kernel; - unsigned long user; - - u32 ie_mask; - u32 flag_mask; -}; - -static struct avr32_perf_counter counter[NR_counter] = { - { - .ie_mask = SYSREG_BIT(IEC), - .flag_mask = SYSREG_BIT(FC), - }, { - .ie_mask = SYSREG_BIT(IE0), - .flag_mask = SYSREG_BIT(F0), - }, { - .ie_mask = SYSREG_BIT(IE1), - .flag_mask = SYSREG_BIT(F1), - }, -}; - -static void avr32_perf_counter_reset(void) -{ - /* Reset all counter and disable/clear all interrupts */ - sysreg_write(PCCR, (SYSREG_BIT(PCCR_R) - | SYSREG_BIT(PCCR_C) - | SYSREG_BIT(FC) - | SYSREG_BIT(F0) - | SYSREG_BIT(F1))); -} - -static irqreturn_t avr32_perf_counter_interrupt(int irq, void *dev_id) -{ - struct avr32_perf_counter *ctr = dev_id; - struct pt_regs *regs; - u32 pccr; - - if (likely(!(intc_get_pending(AVR32_PERFCTR_IRQ_GROUP) - & (1 << AVR32_PERFCTR_IRQ_LINE)))) - return IRQ_NONE; - - regs = get_irq_regs(); - pccr = sysreg_read(PCCR); - - /* Clear the interrupt flags we're about to handle */ - sysreg_write(PCCR, pccr); - - /* PCCNT */ - if (ctr->enabled && (pccr & ctr->flag_mask)) { - sysreg_write(PCCNT, -ctr->count); - oprofile_add_sample(regs, PCCNT); - } - ctr++; - /* PCNT0 */ - if (ctr->enabled && (pccr & ctr->flag_mask)) { - sysreg_write(PCNT0, -ctr->count); - oprofile_add_sample(regs, PCNT0); - } - ctr++; - /* PCNT1 */ - if (ctr->enabled && (pccr & ctr->flag_mask)) { - sysreg_write(PCNT1, -ctr->count); - oprofile_add_sample(regs, PCNT1); - } - - return IRQ_HANDLED; -} - -static int avr32_perf_counter_create_files(struct dentry *root) -{ - struct dentry *dir; - unsigned int i; - char filename[4]; - - for (i = 0; i < NR_counter; i++) { - snprintf(filename, sizeof(filename), "%u", i); - dir = oprofilefs_mkdir(root, filename); - - oprofilefs_create_ulong(dir, "enabled", - &counter[i].enabled); - oprofilefs_create_ulong(dir, "event", - &counter[i].event); - oprofilefs_create_ulong(dir, "count", - &counter[i].count); - - /* Dummy entries */ - oprofilefs_create_ulong(dir, "kernel", - &counter[i].kernel); - oprofilefs_create_ulong(dir, "user", - &counter[i].user); - oprofilefs_create_ulong(dir, "unit_mask", - &counter[i].unit_mask); - } - - return 0; -} - -static int avr32_perf_counter_setup(void) -{ - struct avr32_perf_counter *ctr; - u32 pccr; - int ret; - int i; - - pr_debug("avr32_perf_counter_setup\n"); - - if (sysreg_read(PCCR) & SYSREG_BIT(PCCR_E)) { - printk(KERN_ERR - "oprofile: setup: perf counter already enabled\n"); - return -EBUSY; - } - - ret = request_irq(AVR32_PERFCTR_IRQ_GROUP, - avr32_perf_counter_interrupt, IRQF_SHARED, - "oprofile", counter); - if (ret) - return ret; - - avr32_perf_counter_reset(); - - pccr = 0; - for (i = PCCNT; i < NR_counter; i++) { - ctr = &counter[i]; - if (!ctr->enabled) - continue; - - pr_debug("enabling counter %d...\n", i); - - pccr |= ctr->ie_mask; - - switch (i) { - case PCCNT: - /* PCCNT always counts cycles, so no events */ - sysreg_write(PCCNT, -ctr->count); - break; - case PCNT0: - pccr |= SYSREG_BF(CONF0, ctr->event); - sysreg_write(PCNT0, -ctr->count); - break; - case PCNT1: - pccr |= SYSREG_BF(CONF1, ctr->event); - sysreg_write(PCNT1, -ctr->count); - break; - } - } - - pr_debug("oprofile: writing 0x%x to PCCR...\n", pccr); - - sysreg_write(PCCR, pccr); - - return 0; -} - -static void avr32_perf_counter_shutdown(void) -{ - pr_debug("avr32_perf_counter_shutdown\n"); - - avr32_perf_counter_reset(); - free_irq(AVR32_PERFCTR_IRQ_GROUP, counter); -} - -static int avr32_perf_counter_start(void) -{ - pr_debug("avr32_perf_counter_start\n"); - - sysreg_write(PCCR, sysreg_read(PCCR) | SYSREG_BIT(PCCR_E)); - - return 0; -} - -static void avr32_perf_counter_stop(void) -{ - pr_debug("avr32_perf_counter_stop\n"); - - sysreg_write(PCCR, sysreg_read(PCCR) & ~SYSREG_BIT(PCCR_E)); -} - -static struct oprofile_operations avr32_perf_counter_ops __initdata = { - .create_files = avr32_perf_counter_create_files, - .setup = avr32_perf_counter_setup, - .shutdown = avr32_perf_counter_shutdown, - .start = avr32_perf_counter_start, - .stop = avr32_perf_counter_stop, - .cpu_type = "avr32", -}; - -int __init oprofile_arch_init(struct oprofile_operations *ops) -{ - if (!(current_cpu_data.features & AVR32_FEATURE_PCTR)) - return -ENODEV; - - memcpy(ops, &avr32_perf_counter_ops, - sizeof(struct oprofile_operations)); - - ops->backtrace = avr32_backtrace; - - printk(KERN_INFO "oprofile: using AVR32 performance monitoring.\n"); - - return 0; -} - -void oprofile_arch_exit(void) -{ - -} |