diff options
Diffstat (limited to 'arch/mips/oprofile/op_model_loongson3.c')
| -rw-r--r-- | arch/mips/oprofile/op_model_loongson3.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/arch/mips/oprofile/op_model_loongson3.c b/arch/mips/oprofile/op_model_loongson3.c deleted file mode 100644 index 436b1fc99f2c..000000000000 --- a/arch/mips/oprofile/op_model_loongson3.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * 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/cpu.h> -#include <linux/smp.h> -#include <linux/proc_fs.h> -#include <linux/oprofile.h> -#include <linux/spinlock.h> -#include <linux/interrupt.h> -#include <linux/uaccess.h> -#include <irq.h> -#include <loongson.h> -#include "op_impl.h" - -#define LOONGSON3_PERFCNT_OVERFLOW (1ULL << 63) - -#define LOONGSON3_PERFCTRL_EXL (1UL << 0) -#define LOONGSON3_PERFCTRL_KERNEL (1UL << 1) -#define LOONGSON3_PERFCTRL_SUPERVISOR (1UL << 2) -#define LOONGSON3_PERFCTRL_USER (1UL << 3) -#define LOONGSON3_PERFCTRL_ENABLE (1UL << 4) -#define LOONGSON3_PERFCTRL_W (1UL << 30) -#define LOONGSON3_PERFCTRL_M (1UL << 31) -#define LOONGSON3_PERFCTRL_EVENT(idx, event) \ - (((event) & (idx ? 0x0f : 0x3f)) << 5) - -/* Loongson-3 PerfCount performance counter1 register */ -#define read_c0_perflo1() __read_64bit_c0_register($25, 0) -#define write_c0_perflo1(val) __write_64bit_c0_register($25, 0, val) -#define read_c0_perfhi1() __read_64bit_c0_register($25, 1) -#define write_c0_perfhi1(val) __write_64bit_c0_register($25, 1, val) - -/* Loongson-3 PerfCount performance counter2 register */ -#define read_c0_perflo2() __read_64bit_c0_register($25, 2) -#define write_c0_perflo2(val) __write_64bit_c0_register($25, 2, val) -#define read_c0_perfhi2() __read_64bit_c0_register($25, 3) -#define write_c0_perfhi2(val) __write_64bit_c0_register($25, 3, val) - -static int (*save_perf_irq)(void); - -static struct loongson3_register_config { - unsigned int control1; - unsigned int control2; - unsigned long long reset_counter1; - unsigned long long reset_counter2; - int ctr1_enable, ctr2_enable; -} reg; - -static void reset_counters(void *arg) -{ - write_c0_perfhi1(0); - write_c0_perfhi2(0); - write_c0_perflo1(0xc0000000); - write_c0_perflo2(0x40000000); -} - -/* Compute all of the registers in preparation for enabling profiling. */ -static void loongson3_reg_setup(struct op_counter_config *ctr) -{ - unsigned int control1 = 0; - unsigned int control2 = 0; - - reg.reset_counter1 = 0; - reg.reset_counter2 = 0; - /* Compute the performance counter control word. */ - /* For now count kernel and user mode */ - if (ctr[0].enabled) { - control1 |= LOONGSON3_PERFCTRL_EVENT(0, ctr[0].event) | - LOONGSON3_PERFCTRL_ENABLE; - if (ctr[0].kernel) - control1 |= LOONGSON3_PERFCTRL_KERNEL; - if (ctr[0].user) - control1 |= LOONGSON3_PERFCTRL_USER; - reg.reset_counter1 = 0x8000000000000000ULL - ctr[0].count; - } - - if (ctr[1].enabled) { - control2 |= LOONGSON3_PERFCTRL_EVENT(1, ctr[1].event) | - LOONGSON3_PERFCTRL_ENABLE; - if (ctr[1].kernel) - control2 |= LOONGSON3_PERFCTRL_KERNEL; - if (ctr[1].user) - control2 |= LOONGSON3_PERFCTRL_USER; - reg.reset_counter2 = 0x8000000000000000ULL - ctr[1].count; - } - - if (ctr[0].enabled) - control1 |= LOONGSON3_PERFCTRL_EXL; - if (ctr[1].enabled) - control2 |= LOONGSON3_PERFCTRL_EXL; - - reg.control1 = control1; - reg.control2 = control2; - reg.ctr1_enable = ctr[0].enabled; - reg.ctr2_enable = ctr[1].enabled; -} - -/* Program all of the registers in preparation for enabling profiling. */ -static void loongson3_cpu_setup(void *args) -{ - uint64_t perfcount1, perfcount2; - - perfcount1 = reg.reset_counter1; - perfcount2 = reg.reset_counter2; - write_c0_perfhi1(perfcount1); - write_c0_perfhi2(perfcount2); -} - -static void loongson3_cpu_start(void *args) -{ - /* Start all counters on current CPU */ - reg.control1 |= (LOONGSON3_PERFCTRL_W|LOONGSON3_PERFCTRL_M); - reg.control2 |= (LOONGSON3_PERFCTRL_W|LOONGSON3_PERFCTRL_M); - - if (reg.ctr1_enable) - write_c0_perflo1(reg.control1); - if (reg.ctr2_enable) - write_c0_perflo2(reg.control2); -} - -static void loongson3_cpu_stop(void *args) -{ - /* Stop all counters on current CPU */ - write_c0_perflo1(0xc0000000); - write_c0_perflo2(0x40000000); - memset(®, 0, sizeof(reg)); -} - -static int loongson3_perfcount_handler(void) -{ - unsigned long flags; - uint64_t counter1, counter2; - uint32_t cause, handled = IRQ_NONE; - struct pt_regs *regs = get_irq_regs(); - - cause = read_c0_cause(); - if (!(cause & CAUSEF_PCI)) - return handled; - - counter1 = read_c0_perfhi1(); - counter2 = read_c0_perfhi2(); - - local_irq_save(flags); - - if (counter1 & LOONGSON3_PERFCNT_OVERFLOW) { - if (reg.ctr1_enable) - oprofile_add_sample(regs, 0); - counter1 = reg.reset_counter1; - } - if (counter2 & LOONGSON3_PERFCNT_OVERFLOW) { - if (reg.ctr2_enable) - oprofile_add_sample(regs, 1); - counter2 = reg.reset_counter2; - } - - local_irq_restore(flags); - - write_c0_perfhi1(counter1); - write_c0_perfhi2(counter2); - - if (!(cause & CAUSEF_TI)) - handled = IRQ_HANDLED; - - return handled; -} - -static int loongson3_starting_cpu(unsigned int cpu) -{ - write_c0_perflo1(reg.control1); - write_c0_perflo2(reg.control2); - return 0; -} - -static int loongson3_dying_cpu(unsigned int cpu) -{ - write_c0_perflo1(0xc0000000); - write_c0_perflo2(0x40000000); - return 0; -} - -static int __init loongson3_init(void) -{ - on_each_cpu(reset_counters, NULL, 1); - cpuhp_setup_state_nocalls(CPUHP_AP_MIPS_OP_LOONGSON3_STARTING, - "mips/oprofile/loongson3:starting", - loongson3_starting_cpu, loongson3_dying_cpu); - save_perf_irq = perf_irq; - perf_irq = loongson3_perfcount_handler; - - return 0; -} - -static void loongson3_exit(void) -{ - on_each_cpu(reset_counters, NULL, 1); - cpuhp_remove_state_nocalls(CPUHP_AP_MIPS_OP_LOONGSON3_STARTING); - perf_irq = save_perf_irq; -} - -struct op_mips_model op_model_loongson3_ops = { - .reg_setup = loongson3_reg_setup, - .cpu_setup = loongson3_cpu_setup, - .init = loongson3_init, - .exit = loongson3_exit, - .cpu_start = loongson3_cpu_start, - .cpu_stop = loongson3_cpu_stop, - .cpu_type = "mips/loongson3", - .num_counters = 2 -}; 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