diff options
Diffstat (limited to 'arch/mips/oprofile/common.c')
| -rw-r--r-- | arch/mips/oprofile/common.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/arch/mips/oprofile/common.c b/arch/mips/oprofile/common.c new file mode 100644 index 000000000..81f58958c --- /dev/null +++ b/arch/mips/oprofile/common.c @@ -0,0 +1,146 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2004, 2005 Ralf Baechle + * Copyright (C) 2005 MIPS Technologies, Inc. + */ +#include <linux/compiler.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/oprofile.h> +#include <linux/smp.h> +#include <asm/cpu-info.h> +#include <asm/cpu-type.h> + +#include "op_impl.h" + +extern struct op_mips_model op_model_mipsxx_ops __weak; +extern struct op_mips_model op_model_loongson2_ops __weak; +extern struct op_mips_model op_model_loongson3_ops __weak; + +static struct op_mips_model *model; + +static struct op_counter_config ctr[20]; + +static int op_mips_setup(void) +{ + /* Pre-compute the values to stuff in the hardware registers. */ + model->reg_setup(ctr); + + /* Configure the registers on all cpus. */ + on_each_cpu(model->cpu_setup, NULL, 1); + + return 0; +} + +static int op_mips_create_files(struct dentry *root) +{ + int i; + + for (i = 0; i < model->num_counters; ++i) { + struct dentry *dir; + char buf[4]; + + snprintf(buf, sizeof buf, "%d", i); + dir = oprofilefs_mkdir(root, buf); + + oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled); + oprofilefs_create_ulong(dir, "event", &ctr[i].event); + oprofilefs_create_ulong(dir, "count", &ctr[i].count); + oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel); + oprofilefs_create_ulong(dir, "user", &ctr[i].user); + oprofilefs_create_ulong(dir, "exl", &ctr[i].exl); + /* Dummy. */ + oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask); + } + + return 0; +} + +static int op_mips_start(void) +{ + on_each_cpu(model->cpu_start, NULL, 1); + + return 0; +} + +static void op_mips_stop(void) +{ + /* Disable performance monitoring for all counters. */ + on_each_cpu(model->cpu_stop, NULL, 1); +} + +int __init oprofile_arch_init(struct oprofile_operations *ops) +{ + struct op_mips_model *lmodel = NULL; + int res; + + switch (current_cpu_type()) { + case CPU_5KC: + case CPU_M14KC: + case CPU_M14KEC: + case CPU_20KC: + case CPU_24K: + case CPU_25KF: + case CPU_34K: + case CPU_1004K: + case CPU_74K: + case CPU_1074K: + case CPU_INTERAPTIV: + case CPU_PROAPTIV: + case CPU_P5600: + case CPU_M5150: + case CPU_LOONGSON1: + case CPU_SB1: + case CPU_SB1A: + case CPU_R10000: + case CPU_R12000: + case CPU_R14000: + case CPU_R16000: + case CPU_XLR: + lmodel = &op_model_mipsxx_ops; + break; + + case CPU_LOONGSON2: + lmodel = &op_model_loongson2_ops; + break; + case CPU_LOONGSON3: + lmodel = &op_model_loongson3_ops; + break; + }; + + /* + * Always set the backtrace. This allows unsupported CPU types to still + * use timer-based oprofile. + */ + ops->backtrace = op_mips_backtrace; + + if (!lmodel) + return -ENODEV; + + res = lmodel->init(); + if (res) + return res; + + model = lmodel; + + ops->create_files = op_mips_create_files; + ops->setup = op_mips_setup; + //ops->shutdown = op_mips_shutdown; + ops->start = op_mips_start; + ops->stop = op_mips_stop; + ops->cpu_type = lmodel->cpu_type; + + printk(KERN_INFO "oprofile: using %s performance monitoring.\n", + lmodel->cpu_type); + + return 0; +} + +void oprofile_arch_exit(void) +{ + if (model) + model->exit(); +} |