/* * Copyright (C) 2004 Anton Blanchard , 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 #include #include #include #include #include #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; extern void (*perf_irq)(struct pt_regs *); static void (*save_perf_irq)(struct pt_regs *); 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) { /* Install our interrupt handler into the existing hook. */ save_perf_irq = perf_irq; perf_irq = op_handle_interrupt; mb(); /* 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) { /* * We need to be sure we have cleared all pending exceptions before * removing the interrupt handler. For the moment we play it safe and * leave it in */ #if 0 mb(); /* Remove our interrupt handler. We may be removing this module. */ perf_irq = save_perf_irq; #endif } 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; 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); return 0; } static struct oprofile_operations oprof_ppc64_ops = { .create_files = op_ppc64_create_files, .setup = op_ppc64_setup, .shutdown = op_ppc64_shutdown, .start = op_ppc64_start, .stop = op_ppc64_stop, .cpu_type = NULL /* To be filled in below. */ }; int __init oprofile_arch_init(struct oprofile_operations **ops) { unsigned int pvr; pvr = _get_PVR(); switch (PVR_VER(pvr)) { case PV_630: case PV_630p: model = &op_model_rs64; model->num_counters = 8; oprof_ppc64_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; oprof_ppc64_ops.cpu_type = "ppc64/rs64"; break; case PV_POWER4: case PV_POWER4p: model = &op_model_power4; model->num_counters = 8; oprof_ppc64_ops.cpu_type = "ppc64/power4"; break; case PV_GPUL: case PV_GPULp: model = &op_model_power4; model->num_counters = 8; oprof_ppc64_ops.cpu_type = "ppc64/970"; break; case PV_POWER5: case PV_POWER5p: model = &op_model_power4; model->num_counters = 6; oprof_ppc64_ops.cpu_type = "ppc64/power5"; break; default: return -ENODEV; } *ops = &oprof_ppc64_ops; printk(KERN_INFO "oprofile: using %s performance monitoring.\n", oprof_ppc64_ops.cpu_type); return 0; } void oprofile_arch_exit(void) { }