diff options
Diffstat (limited to 'arch/sh/oprofile/common.c')
| -rw-r--r-- | arch/sh/oprofile/common.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/arch/sh/oprofile/common.c b/arch/sh/oprofile/common.c new file mode 100644 index 00000000000..1d97d64cb95 --- /dev/null +++ b/arch/sh/oprofile/common.c @@ -0,0 +1,150 @@ +/* + * arch/sh/oprofile/init.c + * + * Copyright (C) 2003 - 2008 Paul Mundt + * + * Based on arch/mips/oprofile/common.c: + * + * Copyright (C) 2004, 2005 Ralf Baechle + * Copyright (C) 2005 MIPS Technologies, Inc. + * + * 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. + */ +#include <linux/kernel.h> +#include <linux/oprofile.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/smp.h> +#include <asm/processor.h> +#include "op_impl.h" + +extern struct op_sh_model op_model_sh7750_ops __weak; +extern struct op_sh_model op_model_sh4a_ops __weak; + +static struct op_sh_model *model; + +static struct op_counter_config ctr[20]; + +extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth); + +static int op_sh_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_sh_create_files(struct super_block *sb, struct dentry *root) +{ + int i, ret = 0; + + for (i = 0; i < model->num_counters; i++) { + struct dentry *dir; + char buf[4]; + + snprintf(buf, sizeof(buf), "%d", i); + dir = oprofilefs_mkdir(sb, root, buf); + + ret |= oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); + ret |= oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); + ret |= oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); + ret |= oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); + + if (model->create_files) + ret |= model->create_files(sb, dir); + else + ret |= oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); + + /* Dummy entries */ + ret |= oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); + } + + return ret; +} + +static int op_sh_start(void) +{ + /* Enable performance monitoring for all counters. */ + on_each_cpu(model->cpu_start, NULL, 1); + + return 0; +} + +static void op_sh_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_sh_model *lmodel = NULL; + int ret; + + /* + * Always assign the backtrace op. If the counter initialization + * fails, we fall back to the timer which will still make use of + * this. + */ + ops->backtrace = sh_backtrace; + + switch (current_cpu_data.type) { + /* SH-4 types */ + case CPU_SH7750: + case CPU_SH7750S: + lmodel = &op_model_sh7750_ops; + break; + + /* SH-4A types */ + case CPU_SH7763: + case CPU_SH7770: + case CPU_SH7780: + case CPU_SH7781: + case CPU_SH7785: + case CPU_SH7723: + case CPU_SHX3: + lmodel = &op_model_sh4a_ops; + break; + + /* SH4AL-DSP types */ + case CPU_SH7343: + case CPU_SH7722: + case CPU_SH7366: + lmodel = &op_model_sh4a_ops; + break; + } + + if (!lmodel) + return -ENODEV; + if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER)) + return -ENODEV; + + ret = lmodel->init(); + if (unlikely(ret != 0)) + return ret; + + model = lmodel; + + ops->setup = op_sh_setup; + ops->create_files = op_sh_create_files; + ops->start = op_sh_start; + ops->stop = op_sh_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) + model->exit(); +} |