common.c
来自「linux 内核源代码」· C语言 代码 · 共 233 行
C
233 行
/* * PPC 64 oprofile support: * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM * PPC 32 oprofile support: (based on PPC 64 support) * Copyright (C) Freescale Semiconductor, Inc 2004 * Author: Andy Fleming * * 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 <asm/cputable.h>#include <asm/oprofile_impl.h>#include <asm/firmware.h>static struct op_powerpc_model *model;static struct op_counter_config ctr[OP_MAX_COUNTER];static struct op_system_config sys;static int op_per_cpu_rc;static void op_handle_interrupt(struct pt_regs *regs){ model->handle_interrupt(regs, ctr);}static void op_powerpc_cpu_setup(void *dummy){ int ret; ret = model->cpu_setup(ctr); if (ret != 0) op_per_cpu_rc = ret;}static int op_powerpc_setup(void){ int err; op_per_cpu_rc = 0; /* Grab the hardware */ err = reserve_pmc_hardware(op_handle_interrupt); if (err) return err; /* Pre-compute the values to stuff in the hardware registers. */ op_per_cpu_rc = model->reg_setup(ctr, &sys, model->num_counters); if (op_per_cpu_rc) goto out; /* Configure the registers on all cpus. If an error occurs on one * of the cpus, op_per_cpu_rc will be set to the error */ on_each_cpu(op_powerpc_cpu_setup, NULL, 0, 1);out: if (op_per_cpu_rc) { /* error on setup release the performance counter hardware */ release_pmc_hardware(); } return op_per_cpu_rc;}static void op_powerpc_shutdown(void){ release_pmc_hardware();}static void op_powerpc_cpu_start(void *dummy){ /* If any of the cpus have return an error, set the * global flag to the error so it can be returned * to the generic OProfile caller. */ int ret; ret = model->start(ctr); if (ret != 0) op_per_cpu_rc = ret;}static int op_powerpc_start(void){ op_per_cpu_rc = 0; if (model->global_start) return model->global_start(ctr); if (model->start) { on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1); return op_per_cpu_rc; } return -EIO; /* No start function is defined for this power architecture */}static inline void op_powerpc_cpu_stop(void *dummy){ model->stop();}static void op_powerpc_stop(void){ if (model->stop) on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1); if (model->global_stop) model->global_stop();}static int op_powerpc_create_files(struct super_block *sb, struct dentry *root){ int i;#ifdef CONFIG_PPC64 /* * 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);#endif 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); 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); /* * Classic PowerPC doesn't support per-counter * control like this, but the options are * expected, so they remain. For Freescale * Book-E style performance monitors, we do * support 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); /* Default to tracing both kernel and user */ sys.enable_kernel = 1; sys.enable_user = 1; return 0;}int __init oprofile_arch_init(struct oprofile_operations *ops){ if (!cur_cpu_spec->oprofile_cpu_type) return -ENODEV; if (firmware_has_feature(FW_FEATURE_ISERIES)) return -ENODEV; switch (cur_cpu_spec->oprofile_type) {#ifdef CONFIG_PPC64#ifdef CONFIG_OPROFILE_CELL case PPC_OPROFILE_CELL: if (firmware_has_feature(FW_FEATURE_LPAR)) return -ENODEV; model = &op_model_cell; ops->sync_start = model->sync_start; ops->sync_stop = model->sync_stop; break;#endif case PPC_OPROFILE_RS64: model = &op_model_rs64; break; case PPC_OPROFILE_POWER4: model = &op_model_power4; break; case PPC_OPROFILE_PA6T: model = &op_model_pa6t; break;#endif#ifdef CONFIG_6xx case PPC_OPROFILE_G4: model = &op_model_7450; break;#endif#ifdef CONFIG_FSL_BOOKE case PPC_OPROFILE_BOOKE: model = &op_model_fsl_booke; break;#endif default: return -ENODEV; } model->num_counters = cur_cpu_spec->num_pmcs; ops->cpu_type = cur_cpu_spec->oprofile_cpu_type; ops->create_files = op_powerpc_create_files; ops->setup = op_powerpc_setup; ops->shutdown = op_powerpc_shutdown; ops->start = op_powerpc_start; ops->stop = op_powerpc_stop; ops->backtrace = op_powerpc_backtrace; printk(KERN_DEBUG "oprofile: using %s performance monitoring.\n", ops->cpu_type); return 0;}void oprofile_arch_exit(void){}⌨️ 快捷键说明
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