1 files changed, 189 insertions, 0 deletions

diff --git a/arch/alpha/oprofile/common.c b/arch/alpha/oprofile/common.c
new file mode 100644
index 000000000000..908eb4af8dec
--- /dev/null
+++ b/arch/alpha/oprofile/common.c
@@ -0,0 +1,189 @@
+/**
+ * @file arch/alpha/oprofile/common.c
+ *
+ * @remark Copyright 2002 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author Richard Henderson <rth@twiddle.net>
+ */
+
+#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 "op_impl.h"
+
+extern struct op_axp_model op_model_ev4 __attribute__((weak));
+extern struct op_axp_model op_model_ev5 __attribute__((weak));
+extern struct op_axp_model op_model_pca56 __attribute__((weak));
+extern struct op_axp_model op_model_ev6 __attribute__((weak));
+extern struct op_axp_model op_model_ev67 __attribute__((weak));
+
+static struct op_axp_model *model;
+
+extern void (*perf_irq)(unsigned long, struct pt_regs *);
+static void (*save_perf_irq)(unsigned long, struct pt_regs *);
+
+static struct op_counter_config ctr[20];
+static struct op_system_config sys;
+static struct op_register_config reg;
+
+/* Called from do_entInt to handle the performance monitor interrupt.  */
+
+static void
+op_handle_interrupt(unsigned long which, struct pt_regs *regs)
+{
+        model->handle_interrupt(which, regs, ctr);
+
+        /* If the user has selected an interrupt frequency that is
+           not exactly the width of the counter, write a new value
+           into the counter such that it'll overflow after N more
+           events.  */
+        if ((reg.need_reset >> which) & 1)
+                model->reset_ctr(&reg, which);
+}
+ 
+static int
+op_axp_setup(void)
+{
+        unsigned long i, e;
+
+        /* Install our interrupt handler into the existing hook.  */
+        save_perf_irq = perf_irq;
+        perf_irq = op_handle_interrupt;
+
+        /* Compute the mask of enabled counters.  */
+        for (i = e = 0; i < model->num_counters; ++i)
+                if (ctr[i].enabled)
+                        e |= 1 << i;
+        reg.enable = e;
+
+        /* Pre-compute the values to stuff in the hardware registers.  */
+        model->reg_setup(&reg, ctr, &sys);
+
+        /* Configure the registers on all cpus.  */
+        smp_call_function(model->cpu_setup, &reg, 0, 1);
+        model->cpu_setup(&reg);
+        return 0;
+}
+
+static void
+op_axp_shutdown(void)
+{
+        /* Remove our interrupt handler.  We may be removing this module.  */
+        perf_irq = save_perf_irq;
+}
+
+static void
+op_axp_cpu_start(void *dummy)
+{
+        wrperfmon(1, reg.enable);
+}
+
+static int
+op_axp_start(void)
+{
+        smp_call_function(op_axp_cpu_start, NULL, 0, 1);
+        op_axp_cpu_start(NULL);
+        return 0;
+}
+
+static inline void
+op_axp_cpu_stop(void *dummy)
+{
+        /* Disable performance monitoring for all counters.  */
+        wrperfmon(0, -1);
+}
+
+static void
+op_axp_stop(void)
+{
+        smp_call_function(op_axp_cpu_stop, NULL, 0, 1);
+        op_axp_cpu_stop(NULL);
+}
+
+static int
+op_axp_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);
+                /* Dummies.  */
+                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);
+        }
+
+        if (model->can_set_proc_mode) {
+                oprofilefs_create_ulong(sb, root, "enable_pal",
+                                        &sys.enable_pal);
+                oprofilefs_create_ulong(sb, root, "enable_kernel",
+                                        &sys.enable_kernel);
+                oprofilefs_create_ulong(sb, root, "enable_user",
+                                        &sys.enable_user);
+        }
+
+        return 0;
+}
+
+int __init
+oprofile_arch_init(struct oprofile_operations *ops)
+{
+        struct op_axp_model *lmodel = NULL;
+
+        switch (implver()) {
+        case IMPLVER_EV4:
+                lmodel = &op_model_ev4;
+                break;
+        case IMPLVER_EV5:
+                /* 21164PC has a slightly different set of events.
+                   Recognize the chip by the presence of the MAX insns.  */
+                if (!amask(AMASK_MAX))
+                        lmodel = &op_model_pca56;
+                else
+                        lmodel = &op_model_ev5;
+                break;
+        case IMPLVER_EV6:
+                /* 21264A supports ProfileMe.
+                   Recognize the chip by the presence of the CIX insns.  */
+                if (!amask(AMASK_CIX))
+                        lmodel = &op_model_ev67;
+                else
+                        lmodel = &op_model_ev6;
+                break;
+        }
+
+        if (!lmodel)
+                return -ENODEV;
+        model = lmodel;
+
+        ops->create_files = op_axp_create_files;
+        ops->setup = op_axp_setup;
+        ops->shutdown = op_axp_shutdown;
+        ops->start = op_axp_start;
+        ops->stop = op_axp_stop;
+        ops->cpu_type = lmodel->cpu_type;
+
+        printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
+               lmodel->cpu_type);
+
+        return 0;
+}
+
+
+void
+oprofile_arch_exit(void)
+{
+}