diff options
Diffstat (limited to 'arch/mips/oprofile/op_model_loongson2.c')
| -rw-r--r-- | arch/mips/oprofile/op_model_loongson2.c | 25 |
1 files changed, 5 insertions, 20 deletions
diff --git a/arch/mips/oprofile/op_model_loongson2.c b/arch/mips/oprofile/op_model_loongson2.c index 515f7790c04..d0d24e04767 100644 --- a/arch/mips/oprofile/op_model_loongson2.c +++ b/arch/mips/oprofile/op_model_loongson2.c @@ -8,7 +8,6 @@ * 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> @@ -17,11 +16,6 @@ #include <loongson.h> /* LOONGSON2_PERFCNT_IRQ */ #include "op_impl.h" -/* - * a patch should be sent to oprofile with the loongson-specific support. - * otherwise, the oprofile tool will not recognize this and complain about - * "cpu_type 'unset' is not valid". - */ #define LOONGSON2_CPU_TYPE "mips/loongson2" #define LOONGSON2_PERFCNT_OVERFLOW (1ULL << 31) @@ -34,7 +28,6 @@ #define LOONGSON2_PERFCTRL_EVENT(idx, event) \ (((event) & 0x0f) << ((idx) ? 9 : 5)) -/* Loongson2 performance counter register */ #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) @@ -49,7 +42,6 @@ static struct loongson2_register_config { static char *oprofid = "LoongsonPerf"; static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id); -/* Compute all of the registers in preparation for enabling profiling. */ static void loongson2_reg_setup(struct op_counter_config *cfg) { @@ -57,8 +49,11 @@ static void loongson2_reg_setup(struct op_counter_config *cfg) reg.reset_counter1 = 0; reg.reset_counter2 = 0; - /* Compute the performance counter ctrl word. */ - /* For now count kernel and user mode */ + + /* + * 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; @@ -81,11 +76,8 @@ static void loongson2_reg_setup(struct op_counter_config *cfg) reg.cnt1_enabled = cfg[0].enabled; reg.cnt2_enabled = cfg[1].enabled; - } -/* Program all of the registers in preparation for enabling profiling. */ - static void loongson2_cpu_setup(void *args) { write_c0_perfcnt((reg.reset_counter2 << 32) | reg.reset_counter1); @@ -111,13 +103,6 @@ static irqreturn_t loongson2_perfcount_handler(int irq, void *dev_id) struct pt_regs *regs = get_irq_regs(); int enabled; - /* - * LOONGSON2 defines two 32-bit performance counters. - * To avoid a race updating the registers we need to stop the counters - * while we're messing with - * them ... - */ - /* Check whether the irq belongs to me */ enabled = read_c0_perfctrl() & LOONGSON2_PERFCTRL_ENABLE; if (!enabled) |