diff options
Diffstat (limited to 'arch/ppc64/oprofile/common.c')
| -rw-r--r-- | arch/ppc64/oprofile/common.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/ppc64/oprofile/common.c b/arch/ppc64/oprofile/common.c new file mode 100644 index 000000000000..b28bfda23d94 --- /dev/null +++ b/arch/ppc64/oprofile/common.c @@ -0,0 +1,186 @@ +/* + * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM + * + * Based on alpha version. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/oprofile.h> +#include <linux/init.h> +#include <linux/smp.h> +#include <linux/errno.h> +#include <asm/ptrace.h> +#include <asm/system.h> +#include <asm/pmc.h> + +#include "op_impl.h" + +extern struct op_ppc64_model op_model_rs64; +extern struct op_ppc64_model op_model_power4; +static struct op_ppc64_model *model; + +static struct op_counter_config ctr[OP_MAX_COUNTER]; +static struct op_system_config sys; + +static void op_handle_interrupt(struct pt_regs *regs) +{ + model->handle_interrupt(regs, ctr); +} + +static int op_ppc64_setup(void) +{ + int err; + + /* Grab the hardware */ + err = reserve_pmc_hardware(op_handle_interrupt); + if (err) + return err; + + /* Pre-compute the values to stuff in the hardware registers. */ + model->reg_setup(ctr, &sys, model->num_counters); + + /* Configure the registers on all cpus. */ + on_each_cpu(model->cpu_setup, NULL, 0, 1); + + return 0; +} + +static void op_ppc64_shutdown(void) +{ + release_pmc_hardware(); +} + +static void op_ppc64_cpu_start(void *dummy) +{ + model->start(ctr); +} + +static int op_ppc64_start(void) +{ + on_each_cpu(op_ppc64_cpu_start, NULL, 0, 1); + return 0; +} + +static inline void op_ppc64_cpu_stop(void *dummy) +{ + model->stop(); +} + +static void op_ppc64_stop(void) +{ + on_each_cpu(op_ppc64_cpu_stop, NULL, 0, 1); +} + +static int op_ppc64_create_files(struct super_block *sb, struct dentry *root) +{ + int i; + + /* + * There is one mmcr0, mmcr1 and mmcra for setting the events for + * all of the counters. + */ + oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0); + oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1); + oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra); + + for (i = 0; i < model->num_counters; ++i) { + struct dentry *dir; + char buf[3]; + + snprintf(buf, sizeof buf, "%d", i); + dir = oprofilefs_mkdir(sb, root, buf); + + oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); + oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); + oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); + /* + * We dont support per counter user/kernel selection, but + * we leave the entries because userspace expects them + */ + oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); + oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); + oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); + } + + oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel); + oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user); + oprofilefs_create_ulong(sb, root, "backtrace_spinlocks", + &sys.backtrace_spinlocks); + + /* Default to tracing both kernel and user */ + sys.enable_kernel = 1; + sys.enable_user = 1; + + /* Turn on backtracing through spinlocks by default */ + sys.backtrace_spinlocks = 1; + + return 0; +} + +int __init oprofile_arch_init(struct oprofile_operations *ops) +{ + unsigned int pvr; + + pvr = mfspr(SPRN_PVR); + + switch (PVR_VER(pvr)) { + case PV_630: + case PV_630p: + model = &op_model_rs64; + model->num_counters = 8; + ops->cpu_type = "ppc64/power3"; + break; + + case PV_NORTHSTAR: + case PV_PULSAR: + case PV_ICESTAR: + case PV_SSTAR: + model = &op_model_rs64; + model->num_counters = 8; + ops->cpu_type = "ppc64/rs64"; + break; + + case PV_POWER4: + case PV_POWER4p: + model = &op_model_power4; + model->num_counters = 8; + ops->cpu_type = "ppc64/power4"; + break; + + case PV_970: + case PV_970FX: + model = &op_model_power4; + model->num_counters = 8; + ops->cpu_type = "ppc64/970"; + break; + + case PV_POWER5: + case PV_POWER5p: + model = &op_model_power4; + model->num_counters = 6; + ops->cpu_type = "ppc64/power5"; + break; + + default: + return -ENODEV; + } + + ops->create_files = op_ppc64_create_files; + ops->setup = op_ppc64_setup; + ops->shutdown = op_ppc64_shutdown; + ops->start = op_ppc64_start; + ops->stop = op_ppc64_stop; + + printk(KERN_INFO "oprofile: using %s performance monitoring.\n", + ops->cpu_type); + + return 0; +} + +void oprofile_arch_exit(void) +{ +} |