[POWERPC] pasemi: PA6T oprofile support

Oprofile support for PA6T, kernel side.

Also rename the PA6T_SPRN.* defines to SPRN_PA6T.*.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

9 files changed, 312 insertions, 13 deletions

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index ad74fecae507..9cb24d20f0f9 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -389,6 +389,8 @@ static struct cpu_spec cpu_specs[] = {
                 .pmc_type               = PPC_PMC_PA6T,
                 .cpu_setup              = __setup_cpu_pa6t,
                 .cpu_restore            = __restore_cpu_pa6t,
+                .oprofile_cpu_type      = "ppc64/pa6t",
+                .oprofile_type          = PPC_OPROFILE_PA6T,
                 .platform               = "pa6t",
         },
         {       /* default match */
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 476f1d546056..6fc27e771b5a 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -189,12 +189,12 @@ SYSFS_PMCSETUP(purr, SPRN_PURR);
 SYSFS_PMCSETUP(spurr, SPRN_SPURR);
 SYSFS_PMCSETUP(dscr, SPRN_DSCR);
 
-SYSFS_PMCSETUP(pa6t_pmc0, PA6T_SPRN_PMC0);
-SYSFS_PMCSETUP(pa6t_pmc1, PA6T_SPRN_PMC1);
-SYSFS_PMCSETUP(pa6t_pmc2, PA6T_SPRN_PMC2);
-SYSFS_PMCSETUP(pa6t_pmc3, PA6T_SPRN_PMC3);
-SYSFS_PMCSETUP(pa6t_pmc4, PA6T_SPRN_PMC4);
-SYSFS_PMCSETUP(pa6t_pmc5, PA6T_SPRN_PMC5);
+SYSFS_PMCSETUP(pa6t_pmc0, SPRN_PA6T_PMC0);
+SYSFS_PMCSETUP(pa6t_pmc1, SPRN_PA6T_PMC1);
+SYSFS_PMCSETUP(pa6t_pmc2, SPRN_PA6T_PMC2);
+SYSFS_PMCSETUP(pa6t_pmc3, SPRN_PA6T_PMC3);
+SYSFS_PMCSETUP(pa6t_pmc4, SPRN_PA6T_PMC4);
+SYSFS_PMCSETUP(pa6t_pmc5, SPRN_PA6T_PMC5);
 
 
 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
diff --git a/arch/powerpc/oprofile/Makefile b/arch/powerpc/oprofile/Makefile
index 4ccef2d5530c..4b5f9528218c 100644
--- a/arch/powerpc/oprofile/Makefile
+++ b/arch/powerpc/oprofile/Makefile
@@ -12,6 +12,6 @@ DRIVER_OBJS := $(addprefix ../../../drivers/oprofile/, \
 
 oprofile-y := $(DRIVER_OBJS) common.o backtrace.o
 oprofile-$(CONFIG_PPC_CELL_NATIVE) += op_model_cell.o
-oprofile-$(CONFIG_PPC64) += op_model_rs64.o op_model_power4.o
+oprofile-$(CONFIG_PPC64) += op_model_rs64.o op_model_power4.o op_model_pa6t.o
 oprofile-$(CONFIG_FSL_BOOKE) += op_model_fsl_booke.o
 oprofile-$(CONFIG_6xx) += op_model_7450.o
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
index fbd62eacfdf4..1a7ef7e246d2 100644
--- a/arch/powerpc/oprofile/common.c
+++ b/arch/powerpc/oprofile/common.c
@@ -160,6 +160,9 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
                 case PPC_OPROFILE_POWER4:
                         model = &op_model_power4;
                         break;
+                case PPC_OPROFILE_PA6T:
+                        model = &op_model_pa6t;
+                        break;
 #endif
 #ifdef CONFIG_6xx
                 case PPC_OPROFILE_G4:
diff --git a/arch/powerpc/oprofile/op_model_pa6t.c b/arch/powerpc/oprofile/op_model_pa6t.c
new file mode 100644
index 000000000000..e8a56b0adadc
--- /dev/null
+++ b/arch/powerpc/oprofile/op_model_pa6t.c
@@ -0,0 +1,234 @@
+/*
+ * Copyright (C) 2006-2007 PA Semi, Inc
+ *
+ * Author: Shashi Rao, PA Semi
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * Based on arch/powerpc/oprofile/op_model_power4.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/oprofile.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/percpu.h>
+#include <asm/processor.h>
+#include <asm/cputable.h>
+#include <asm/oprofile_impl.h>
+#include <asm/reg.h>
+
+static unsigned char oprofile_running;
+
+/* mmcr values are set in pa6t_reg_setup, used in pa6t_cpu_setup */
+static u64 mmcr0_val;
+static u64 mmcr1_val;
+
+/* inited in pa6t_reg_setup */
+static u64 reset_value[OP_MAX_COUNTER];
+
+static inline u64 ctr_read(unsigned int i)
+{
+        switch (i) {
+        case 0:
+                return mfspr(SPRN_PA6T_PMC0);
+        case 1:
+                return mfspr(SPRN_PA6T_PMC1);
+        case 2:
+                return mfspr(SPRN_PA6T_PMC2);
+        case 3:
+                return mfspr(SPRN_PA6T_PMC3);
+        case 4:
+                return mfspr(SPRN_PA6T_PMC4);
+        case 5:
+                return mfspr(SPRN_PA6T_PMC5);
+        default:
+                printk(KERN_ERR "ctr_read called with bad arg %u\n", i);
+                return 0;
+        }
+}
+
+static inline void ctr_write(unsigned int i, u64 val)
+{
+        switch (i) {
+        case 0:
+                mtspr(SPRN_PA6T_PMC0, val);
+                break;
+        case 1:
+                mtspr(SPRN_PA6T_PMC1, val);
+                break;
+        case 2:
+                mtspr(SPRN_PA6T_PMC2, val);
+                break;
+        case 3:
+                mtspr(SPRN_PA6T_PMC3, val);
+                break;
+        case 4:
+                mtspr(SPRN_PA6T_PMC4, val);
+                break;
+        case 5:
+                mtspr(SPRN_PA6T_PMC5, val);
+                break;
+        default:
+                printk(KERN_ERR "ctr_write called with bad arg %u\n", i);
+                break;
+        }
+}
+
+
+/* precompute the values to stuff in the hardware registers */
+static void pa6t_reg_setup(struct op_counter_config *ctr,
+                           struct op_system_config *sys,
+                           int num_ctrs)
+{
+        int pmc;
+
+        /*
+         * adjust the mmcr0.en[0-5] and mmcr0.inten[0-5] values obtained from the
+         * event_mappings file by turning off the counters that the user doesn't
+         * care about
+         *
+         * setup user and kernel profiling
+         */
+        for (pmc = 0; pmc < cur_cpu_spec->num_pmcs; pmc++)
+                if (!ctr[pmc].enabled) {
+                        sys->mmcr0 &= ~(0x1UL << pmc);
+                        sys->mmcr0 &= ~(0x1UL << (pmc+12));
+                        pr_debug("turned off counter %u\n", pmc);
+                }
+
+        if (sys->enable_kernel)
+                sys->mmcr0 |= PA6T_MMCR0_SUPEN | PA6T_MMCR0_HYPEN;
+        else
+                sys->mmcr0 &= ~(PA6T_MMCR0_SUPEN | PA6T_MMCR0_HYPEN);
+
+        if (sys->enable_user)
+                sys->mmcr0 |= PA6T_MMCR0_PREN;
+        else
+                sys->mmcr0 &= ~PA6T_MMCR0_PREN;
+
+        /*
+         * The performance counter event settings are given in the mmcr0 and
+         * mmcr1 values passed from the user in the op_system_config
+         * structure (sys variable).
+         */
+        mmcr0_val = sys->mmcr0;
+        mmcr1_val = sys->mmcr1;
+        pr_debug("mmcr0_val inited to %016lx\n", sys->mmcr0);
+        pr_debug("mmcr1_val inited to %016lx\n", sys->mmcr1);
+
+        for (pmc = 0; pmc < cur_cpu_spec->num_pmcs; pmc++) {
+                /* counters are 40 bit. Move to cputable at some point? */
+                reset_value[pmc] = (0x1UL << 39) - ctr[pmc].count;
+                pr_debug("reset_value for pmc%u inited to 0x%lx\n",
+                                 pmc, reset_value[pmc]);
+        }
+}
+
+/* configure registers on this cpu */
+static void pa6t_cpu_setup(struct op_counter_config *ctr)
+{
+        u64 mmcr0 = mmcr0_val;
+        u64 mmcr1 = mmcr1_val;
+
+        /* Default is all PMCs off */
+        mmcr0 &= ~(0x3FUL);
+        mtspr(SPRN_PA6T_MMCR0, mmcr0);
+
+        /* program selected programmable events in */
+        mtspr(SPRN_PA6T_MMCR1, mmcr1);
+
+        pr_debug("setup on cpu %d, mmcr0 %016lx\n", smp_processor_id(),
+                mfspr(SPRN_PA6T_MMCR0));
+        pr_debug("setup on cpu %d, mmcr1 %016lx\n", smp_processor_id(),
+                mfspr(SPRN_PA6T_MMCR1));
+}
+
+static void pa6t_start(struct op_counter_config *ctr)
+{
+        int i;
+
+        /* Hold off event counting until rfid */
+        u64 mmcr0 = mmcr0_val | PA6T_MMCR0_HANDDIS;
+
+        for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
+                if (ctr[i].enabled)
+                        ctr_write(i, reset_value[i]);
+                else
+                        ctr_write(i, 0UL);
+
+        mtspr(SPRN_PA6T_MMCR0, mmcr0);
+
+        oprofile_running = 1;
+
+        pr_debug("start on cpu %d, mmcr0 %lx\n", smp_processor_id(), mmcr0);
+}
+
+static void pa6t_stop(void)
+{
+        u64 mmcr0;
+
+        /* freeze counters */
+        mmcr0 = mfspr(SPRN_PA6T_MMCR0);
+        mmcr0 |= PA6T_MMCR0_FCM0;
+        mtspr(SPRN_PA6T_MMCR0, mmcr0);
+
+        oprofile_running = 0;
+
+        pr_debug("stop on cpu %d, mmcr0 %lx\n", smp_processor_id(), mmcr0);
+}
+
+/* handle the perfmon overflow vector */
+static void pa6t_handle_interrupt(struct pt_regs *regs,
+                                  struct op_counter_config *ctr)
+{
+        unsigned long pc = mfspr(SPRN_PA6T_SIAR);
+        int is_kernel = is_kernel_addr(pc);
+        u64 val;
+        int i;
+        u64 mmcr0;
+
+        /* disable perfmon counting until rfid */
+        mmcr0 = mfspr(SPRN_PA6T_MMCR0);
+        mtspr(SPRN_PA6T_MMCR0, mmcr0 | PA6T_MMCR0_HANDDIS);
+
+        /* Record samples. We've got one global bit for whether a sample
+         * was taken, so add it for any counter that triggered overflow.
+         */
+        for (i = 0; i < cur_cpu_spec->num_pmcs; i++) {
+                val = ctr_read(i);
+                if (val & (0x1UL << 39)) { /* Overflow bit set */
+                        if (oprofile_running && ctr[i].enabled) {
+                                if (mmcr0 & PA6T_MMCR0_SIARLOG)
+                                        oprofile_add_ext_sample(pc, regs, i, is_kernel);
+                                ctr_write(i, reset_value[i]);
+                        } else {
+                                ctr_write(i, 0UL);
+                        }
+                }
+        }
+
+        /* Restore mmcr0 to a good known value since the PMI changes it */
+        mmcr0 = mmcr0_val | PA6T_MMCR0_HANDDIS;
+        mtspr(SPRN_PA6T_MMCR0, mmcr0);
+}
+
+struct op_powerpc_model op_model_pa6t = {
+        .reg_setup              = pa6t_reg_setup,
+        .cpu_setup              = pa6t_cpu_setup,
+        .start                  = pa6t_start,
+        .stop                   = pa6t_stop,
+        .handle_interrupt       = pa6t_handle_interrupt,
+};
diff --git a/include/asm-powerpc/cputable.h b/include/asm-powerpc/cputable.h
index 4f7c25518641..434524931ef3 100644
--- a/include/asm-powerpc/cputable.h
+++ b/include/asm-powerpc/cputable.h
@@ -48,6 +48,7 @@ enum powerpc_oprofile_type {
         PPC_OPROFILE_G4 = 3,
         PPC_OPROFILE_BOOKE = 4,
         PPC_OPROFILE_CELL = 5,
+        PPC_OPROFILE_PA6T = 6,
 };
 
 enum powerpc_pmc_type {
diff --git a/include/asm-powerpc/oprofile_impl.h b/include/asm-powerpc/oprofile_impl.h
index 94c0ad2bff96..8d6b47f7b300 100644
--- a/include/asm-powerpc/oprofile_impl.h
+++ b/include/asm-powerpc/oprofile_impl.h
@@ -57,6 +57,8 @@ extern struct op_powerpc_model op_model_rs64;
 extern struct op_powerpc_model op_model_power4;
 extern struct op_powerpc_model op_model_7450;
 extern struct op_powerpc_model op_model_cell;
+extern struct op_powerpc_model op_model_pa6t;
+
 
 /* All the classic PPC parts use these */
 static inline unsigned int classic_ctr_read(unsigned int i)
diff --git a/include/asm-powerpc/pmc.h b/include/asm-powerpc/pmc.h
index 8588be68e0ad..d6a616a1b3ea 100644
--- a/include/asm-powerpc/pmc.h
+++ b/include/asm-powerpc/pmc.h
@@ -30,6 +30,7 @@ void release_pmc_hardware(void);
 
 #ifdef CONFIG_PPC64
 void power4_enable_pmcs(void);
+void pasemi_enable_pmcs(void);
 #endif
 
 #endif /* __KERNEL__ */
diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h
index 0d7f0164ed81..749c7f953b58 100644
--- a/include/asm-powerpc/reg.h
+++ b/include/asm-powerpc/reg.h
@@ -469,12 +469,68 @@
 #define SPRN_SIAR       780
 #define SPRN_SDAR       781
 
-#define PA6T_SPRN_PMC0  787
-#define PA6T_SPRN_PMC1  788
-#define PA6T_SPRN_PMC2  789
-#define PA6T_SPRN_PMC3  790
-#define PA6T_SPRN_PMC4  791
-#define PA6T_SPRN_PMC5  792
+#define SPRN_PA6T_MMCR0 795
+#define   PA6T_MMCR0_EN0        0x0000000000000001UL
+#define   PA6T_MMCR0_EN1        0x0000000000000002UL
+#define   PA6T_MMCR0_EN2        0x0000000000000004UL
+#define   PA6T_MMCR0_EN3        0x0000000000000008UL
+#define   PA6T_MMCR0_EN4        0x0000000000000010UL
+#define   PA6T_MMCR0_EN5        0x0000000000000020UL
+#define   PA6T_MMCR0_SUPEN      0x0000000000000040UL
+#define   PA6T_MMCR0_PREN       0x0000000000000080UL
+#define   PA6T_MMCR0_HYPEN      0x0000000000000100UL
+#define   PA6T_MMCR0_FCM0       0x0000000000000200UL
+#define   PA6T_MMCR0_FCM1       0x0000000000000400UL
+#define   PA6T_MMCR0_INTGEN     0x0000000000000800UL
+#define   PA6T_MMCR0_INTEN0     0x0000000000001000UL
+#define   PA6T_MMCR0_INTEN1     0x0000000000002000UL
+#define   PA6T_MMCR0_INTEN2     0x0000000000004000UL
+#define   PA6T_MMCR0_INTEN3     0x0000000000008000UL
+#define   PA6T_MMCR0_INTEN4     0x0000000000010000UL
+#define   PA6T_MMCR0_INTEN5     0x0000000000020000UL
+#define   PA6T_MMCR0_DISCNT     0x0000000000040000UL
+#define   PA6T_MMCR0_UOP        0x0000000000080000UL
+#define   PA6T_MMCR0_TRG        0x0000000000100000UL
+#define   PA6T_MMCR0_TRGEN      0x0000000000200000UL
+#define   PA6T_MMCR0_TRGREG     0x0000000001600000UL
+#define   PA6T_MMCR0_SIARLOG    0x0000000002000000UL
+#define   PA6T_MMCR0_SDARLOG    0x0000000004000000UL
+#define   PA6T_MMCR0_PROEN      0x0000000008000000UL
+#define   PA6T_MMCR0_PROLOG     0x0000000010000000UL
+#define   PA6T_MMCR0_DAMEN2     0x0000000020000000UL
+#define   PA6T_MMCR0_DAMEN3     0x0000000040000000UL
+#define   PA6T_MMCR0_DAMEN4     0x0000000080000000UL
+#define   PA6T_MMCR0_DAMEN5     0x0000000100000000UL
+#define   PA6T_MMCR0_DAMSEL2    0x0000000200000000UL
+#define   PA6T_MMCR0_DAMSEL3    0x0000000400000000UL
+#define   PA6T_MMCR0_DAMSEL4    0x0000000800000000UL
+#define   PA6T_MMCR0_DAMSEL5    0x0000001000000000UL
+#define   PA6T_MMCR0_HANDDIS    0x0000002000000000UL
+#define   PA6T_MMCR0_PCTEN      0x0000004000000000UL
+#define   PA6T_MMCR0_SOCEN      0x0000008000000000UL
+#define   PA6T_MMCR0_SOCMOD     0x0000010000000000UL
+
+#define SPRN_PA6T_MMCR1 798
+#define   PA6T_MMCR1_ES2        0x00000000000000ffUL
+#define   PA6T_MMCR1_ES3        0x000000000000ff00UL
+#define   PA6T_MMCR1_ES4        0x0000000000ff0000UL
+#define   PA6T_MMCR1_ES5        0x00000000ff000000UL
+
+#define SPRN_PA6T_SIAR  780
+#define SPRN_PA6T_UPMC0 771
+#define SPRN_PA6T_UPMC1 772
+#define SPRN_PA6T_UPMC2 773
+#define SPRN_PA6T_UPMC3 774
+#define SPRN_PA6T_UPMC4 775
+#define SPRN_PA6T_UPMC5 776
+#define SPRN_PA6T_UMMCR0 779
+#define SPRN_PA6T_UMMCR1 782
+#define SPRN_PA6T_PMC0  787
+#define SPRN_PA6T_PMC1  788
+#define SPRN_PA6T_PMC2  789
+#define SPRN_PA6T_PMC3  790
+#define SPRN_PA6T_PMC4  791
+#define SPRN_PA6T_PMC5  792
 
 #else /* 32-bit */
 #define SPRN_MMCR0      952     /* Monitor Mode Control Register 0 */