diff options
Diffstat (limited to 'arch/mips/oprofile/op_model_loongson2.c')
| -rw-r--r-- | arch/mips/oprofile/op_model_loongson2.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/arch/mips/oprofile/op_model_loongson2.c b/arch/mips/oprofile/op_model_loongson2.c deleted file mode 100644 index b249ec0bebb2..000000000000 --- a/arch/mips/oprofile/op_model_loongson2.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Loongson2 performance counter driver for oprofile - * - * Copyright (C) 2009 Lemote Inc. - * Author: Yanhua <yanh@lemote.com> - * Author: Wu Zhangjin <wuzhangjin@gmail.com> - * - * 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/init.h> -#include <linux/oprofile.h> -#include <linux/interrupt.h> - -#include <loongson.h> /* LOONGSON2_PERFCNT_IRQ */ -#include "op_impl.h" - -#define LOONGSON2_CPU_TYPE "mips/loongson2" - -#define LOONGSON2_PERFCNT_OVERFLOW (1ULL << 31) - -#define LOONGSON2_PERFCTRL_EXL (1UL << 0) -#define LOONGSON2_PERFCTRL_KERNEL (1UL << 1) -#define LOONGSON2_PERFCTRL_SUPERVISOR (1UL << 2) -#define LOONGSON2_PERFCTRL_USER (1UL << 3) -#define LOONGSON2_PERFCTRL_ENABLE (1UL << 4) -#define LOONGSON2_PERFCTRL_EVENT(idx, event) \ - (((event) & 0x0f) << ((idx) ? 9 : 5)) - -#define read_c0_perfctrl() __read_64bit_c0_register($24, 0) -#define write_c0_perfctrl(val) __write_64bit_c0_register($24, 0, val) -#define read_c0_perfcnt() __read_64bit_c0_register($25, 0) -#define write_c0_perfcnt(val) __write_64bit_c0_register($25, 0, val) - -static struct loongson2_register_config { - unsigned int ctrl; - unsigned long long reset_counter1; - unsigned long long reset_counter2; - int cnt1_enabled, cnt2_enabled; -} reg; - -static char *oprofid = "LoongsonPerf"; -static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id); - -static void reset_counters(void *arg) -{ - write_c0_perfctrl(0); - write_c0_perfcnt(0); -} - -static void loongson2_reg_setup(struct op_counter_config *cfg) -{ - unsigned int ctrl = 0; - - reg.reset_counter1 = 0; - reg.reset_counter2 = 0; - - /* - * Compute the performance counter ctrl word. - * For now, count kernel and user mode. - */ - if (cfg[0].enabled) { - ctrl |= LOONGSON2_PERFCTRL_EVENT(0, cfg[0].event); - reg.reset_counter1 = 0x80000000ULL - cfg[0].count; - } - - if (cfg[1].enabled) { - ctrl |= LOONGSON2_PERFCTRL_EVENT(1, cfg[1].event); - reg.reset_counter2 = 0x80000000ULL - cfg[1].count; - } - - if (cfg[0].enabled || cfg[1].enabled) { - ctrl |= LOONGSON2_PERFCTRL_EXL | LOONGSON2_PERFCTRL_ENABLE; - if (cfg[0].kernel || cfg[1].kernel) - ctrl |= LOONGSON2_PERFCTRL_KERNEL; - if (cfg[0].user || cfg[1].user) - ctrl |= LOONGSON2_PERFCTRL_USER; - } - - reg.ctrl = ctrl; - - reg.cnt1_enabled = cfg[0].enabled; - reg.cnt2_enabled = cfg[1].enabled; -} - -static void loongson2_cpu_setup(void *args) -{ - write_c0_perfcnt((reg.reset_counter2 << 32) | reg.reset_counter1); -} - -static void loongson2_cpu_start(void *args) -{ - /* Start all counters on current CPU */ - if (reg.cnt1_enabled || reg.cnt2_enabled) - write_c0_perfctrl(reg.ctrl); -} - -static void loongson2_cpu_stop(void *args) -{ - /* Stop all counters on current CPU */ - write_c0_perfctrl(0); - memset(®, 0, sizeof(reg)); -} - -static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id) -{ - uint64_t counter, counter1, counter2; - struct pt_regs *regs = get_irq_regs(); - int enabled; - - /* Check whether the irq belongs to me */ - enabled = read_c0_perfctrl() & LOONGSON2_PERFCTRL_ENABLE; - if (!enabled) - return IRQ_NONE; - enabled = reg.cnt1_enabled | reg.cnt2_enabled; - if (!enabled) - return IRQ_NONE; - - counter = read_c0_perfcnt(); - counter1 = counter & 0xffffffff; - counter2 = counter >> 32; - - if (counter1 & LOONGSON2_PERFCNT_OVERFLOW) { - if (reg.cnt1_enabled) - oprofile_add_sample(regs, 0); - counter1 = reg.reset_counter1; - } - if (counter2 & LOONGSON2_PERFCNT_OVERFLOW) { - if (reg.cnt2_enabled) - oprofile_add_sample(regs, 1); - counter2 = reg.reset_counter2; - } - - write_c0_perfcnt((counter2 << 32) | counter1); - - return IRQ_HANDLED; -} - -static int __init loongson2_init(void) -{ - return request_irq(LOONGSON2_PERFCNT_IRQ, loongson2_perfcount_handler, - IRQF_SHARED, "Perfcounter", oprofid); -} - -static void loongson2_exit(void) -{ - reset_counters(NULL); - free_irq(LOONGSON2_PERFCNT_IRQ, oprofid); -} - -struct op_mips_model op_model_loongson2_ops = { - .reg_setup = loongson2_reg_setup, - .cpu_setup = loongson2_cpu_setup, - .init = loongson2_init, - .exit = loongson2_exit, - .cpu_start = loongson2_cpu_start, - .cpu_stop = loongson2_cpu_stop, - .cpu_type = LOONGSON2_CPU_TYPE, - .num_counters = 2 -}; |