[POWERPC] Fix oprofile support for e500 in arch/powerpc

Fixed a compile error in building the 85xx support with oprofile, and in
the process cleaned up some issues with the fsl_booke performance monitor
code.

* Reorganized FSL Book-E performance monitoring code so that the 7450
  wouldn't be built if the e500 was, and cleaned it up so it was more
  self-contained.

* Added a cpu_setup function for FSL Book-E.  The original
  cpu_setup function prototype had no arguments, assuming that
  the reg_setup function would copy the required information into
  variables which represented the registers.  This was silly for
  e500, since it has 1 register per counter (rather than 3 for
  all counters), so the code has been restructured to have
  cpu_setup take the current counter config array as an argument,
  with op_powerpc_setup() invoking op_powerpc_cpu_setup() through
  on_each_cpu(), and op_powerpc_cpu_setup() invoking the
  model-specific cpu_setup function with an argument.  The
  argument is ignored on all other platforms at present.

* Fixed a confusing line where a trinary operator only had two
  arguments

Signed-off-by: Andrew Fleming <afleming@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

6 files changed, 148 insertions, 40 deletions

diff --git a/arch/powerpc/oprofile/Makefile b/arch/powerpc/oprofile/Makefile
index 3145d610b5b..0b5df9c96ae 100644
--- a/arch/powerpc/oprofile/Makefile
+++ b/arch/powerpc/oprofile/Makefile
@@ -13,4 +13,4 @@ DRIVER_OBJS := $(addprefix ../../../drivers/oprofile/, \
 oprofile-y := $(DRIVER_OBJS) common.o backtrace.o
 oprofile-$(CONFIG_PPC64) += op_model_rs64.o op_model_power4.o
 oprofile-$(CONFIG_FSL_BOOKE) += op_model_fsl_booke.o
-oprofile-$(CONFIG_PPC32) += op_model_7450.o
+oprofile-$(CONFIG_6xx) += op_model_7450.o
diff --git a/arch/powerpc/oprofile/common.c b/arch/powerpc/oprofile/common.c
index fd0bbbe7a4d..63bbef3b63f 100644
--- a/arch/powerpc/oprofile/common.c
+++ b/arch/powerpc/oprofile/common.c
@@ -34,6 +34,11 @@ static void op_handle_interrupt(struct pt_regs *regs)
         model->handle_interrupt(regs, ctr);
 }
 
+static void op_powerpc_cpu_setup(void *dummy)
+{
+        model->cpu_setup(ctr);
+}
+
 static int op_powerpc_setup(void)
 {
         int err;
@@ -47,7 +52,7 @@ static int op_powerpc_setup(void)
         model->reg_setup(ctr, &sys, model->num_counters);
 
         /* Configure the registers on all cpus.  */
-        on_each_cpu(model->cpu_setup, NULL, 0, 1);
+        on_each_cpu(op_powerpc_cpu_setup, NULL, 0, 1);
 
         return 0;
 }
@@ -142,7 +147,8 @@ int __init oprofile_arch_init(struct oprofile_operations *ops)
                 case PPC_OPROFILE_POWER4:
                         model = &op_model_power4;
                         break;
-#else
+#endif
+#ifdef CONFIG_6xx
                 case PPC_OPROFILE_G4:
                         model = &op_model_7450;
                         break;
diff --git a/arch/powerpc/oprofile/op_model_7450.c b/arch/powerpc/oprofile/op_model_7450.c
index d8ee3aea83f..f481c0ed5e6 100644
--- a/arch/powerpc/oprofile/op_model_7450.c
+++ b/arch/powerpc/oprofile/op_model_7450.c
@@ -81,7 +81,7 @@ static void pmc_stop_ctrs(void)
 
 /* Configures the counters on this CPU based on the global
  * settings */
-static void fsl7450_cpu_setup(void *unused)
+static void fsl7450_cpu_setup(struct op_counter_config *ctr)
 {
         /* freeze all counters */
         pmc_stop_ctrs();
diff --git a/arch/powerpc/oprofile/op_model_fsl_booke.c b/arch/powerpc/oprofile/op_model_fsl_booke.c
index e29dede3142..0b3c31f5209 100644
--- a/arch/powerpc/oprofile/op_model_fsl_booke.c
+++ b/arch/powerpc/oprofile/op_model_fsl_booke.c
@@ -32,42 +32,152 @@ static unsigned long reset_value[OP_MAX_COUNTER];
 static int num_counters;
 static int oprofile_running;
 
-static inline unsigned int ctr_read(unsigned int i)
+static void init_pmc_stop(int ctr)
 {
-        switch(i) {
-                case 0:
-                        return mfpmr(PMRN_PMC0);
-                case 1:
-                        return mfpmr(PMRN_PMC1);
-                case 2:
-                        return mfpmr(PMRN_PMC2);
-                case 3:
-                        return mfpmr(PMRN_PMC3);
-                default:
-                        return 0;
-        }
-}
+        u32 pmlca = (PMLCA_FC | PMLCA_FCS | PMLCA_FCU |
+                        PMLCA_FCM1 | PMLCA_FCM0);
+        u32 pmlcb = 0;
 
-static inline void ctr_write(unsigned int i, unsigned int val)
-{
-        switch(i) {
+        switch (ctr) {
                 case 0:
-                        mtpmr(PMRN_PMC0, val);
+                        mtpmr(PMRN_PMLCA0, pmlca);
+                        mtpmr(PMRN_PMLCB0, pmlcb);
                         break;
                 case 1:
-                        mtpmr(PMRN_PMC1, val);
+                        mtpmr(PMRN_PMLCA1, pmlca);
+                        mtpmr(PMRN_PMLCB1, pmlcb);
                         break;
                 case 2:
-                        mtpmr(PMRN_PMC2, val);
+                        mtpmr(PMRN_PMLCA2, pmlca);
+                        mtpmr(PMRN_PMLCB2, pmlcb);
                         break;
                 case 3:
-                        mtpmr(PMRN_PMC3, val);
+                        mtpmr(PMRN_PMLCA3, pmlca);
+                        mtpmr(PMRN_PMLCB3, pmlcb);
                         break;
                 default:
-                        break;
+                        panic("Bad ctr number!\n");
         }
 }
 
+static void set_pmc_event(int ctr, int event)
+{
+        u32 pmlca;
+
+        pmlca = get_pmlca(ctr);
+
+        pmlca = (pmlca & ~PMLCA_EVENT_MASK) |
+                ((event << PMLCA_EVENT_SHIFT) &
+                 PMLCA_EVENT_MASK);
+
+        set_pmlca(ctr, pmlca);
+}
+
+static void set_pmc_user_kernel(int ctr, int user, int kernel)
+{
+        u32 pmlca;
+
+        pmlca = get_pmlca(ctr);
+
+        if(user)
+                pmlca &= ~PMLCA_FCU;
+        else
+                pmlca |= PMLCA_FCU;
+
+        if(kernel)
+                pmlca &= ~PMLCA_FCS;
+        else
+                pmlca |= PMLCA_FCS;
+
+        set_pmlca(ctr, pmlca);
+}
+
+static void set_pmc_marked(int ctr, int mark0, int mark1)
+{
+        u32 pmlca = get_pmlca(ctr);
+
+        if(mark0)
+                pmlca &= ~PMLCA_FCM0;
+        else
+                pmlca |= PMLCA_FCM0;
+
+        if(mark1)
+                pmlca &= ~PMLCA_FCM1;
+        else
+                pmlca |= PMLCA_FCM1;
+
+        set_pmlca(ctr, pmlca);
+}
+
+static void pmc_start_ctr(int ctr, int enable)
+{
+        u32 pmlca = get_pmlca(ctr);
+
+        pmlca &= ~PMLCA_FC;
+
+        if (enable)
+                pmlca |= PMLCA_CE;
+        else
+                pmlca &= ~PMLCA_CE;
+
+        set_pmlca(ctr, pmlca);
+}
+
+static void pmc_start_ctrs(int enable)
+{
+        u32 pmgc0 = mfpmr(PMRN_PMGC0);
+
+        pmgc0 &= ~PMGC0_FAC;
+        pmgc0 |= PMGC0_FCECE;
+
+        if (enable)
+                pmgc0 |= PMGC0_PMIE;
+        else
+                pmgc0 &= ~PMGC0_PMIE;
+
+        mtpmr(PMRN_PMGC0, pmgc0);
+}
+
+static void pmc_stop_ctrs(void)
+{
+        u32 pmgc0 = mfpmr(PMRN_PMGC0);
+
+        pmgc0 |= PMGC0_FAC;
+
+        pmgc0 &= ~(PMGC0_PMIE | PMGC0_FCECE);
+
+        mtpmr(PMRN_PMGC0, pmgc0);
+}
+
+static void dump_pmcs(void)
+{
+        printk("pmgc0: %x\n", mfpmr(PMRN_PMGC0));
+        printk("pmc\t\tpmlca\t\tpmlcb\n");
+        printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC0),
+                        mfpmr(PMRN_PMLCA0), mfpmr(PMRN_PMLCB0));
+        printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC1),
+                        mfpmr(PMRN_PMLCA1), mfpmr(PMRN_PMLCB1));
+        printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC2),
+                        mfpmr(PMRN_PMLCA2), mfpmr(PMRN_PMLCB2));
+        printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC3),
+                        mfpmr(PMRN_PMLCA3), mfpmr(PMRN_PMLCB3));
+}
+
+static void fsl_booke_cpu_setup(struct op_counter_config *ctr)
+{
+        int i;
+
+        /* freeze all counters */
+        pmc_stop_ctrs();
+
+        for (i = 0;i < num_counters;i++) {
+                init_pmc_stop(i);
+
+                set_pmc_event(i, ctr[i].event);
+
+                set_pmc_user_kernel(i, ctr[i].user, ctr[i].kernel);
+        }
+}
 
 static void fsl_booke_reg_setup(struct op_counter_config *ctr,
                              struct op_system_config *sys,
@@ -77,23 +187,14 @@ static void fsl_booke_reg_setup(struct op_counter_config *ctr,
 
         num_counters = num_ctrs;
 
-        /* freeze all counters */
-        pmc_stop_ctrs();
-
         /* Our counters count up, and "count" refers to
          * how much before the next interrupt, and we interrupt
          * on overflow.  So we calculate the starting value
          * which will give us "count" until overflow.
          * Then we set the events on the enabled counters */
-        for (i = 0; i < num_counters; ++i) {
+        for (i = 0; i < num_counters; ++i)
                 reset_value[i] = 0x80000000UL - ctr[i].count;
 
-                init_pmc_stop(i);
-
-                set_pmc_event(i, ctr[i].event);
-
-                set_pmc_user_kernel(i, ctr[i].user, ctr[i].kernel);
-        }
 }
 
 static void fsl_booke_start(struct op_counter_config *ctr)
@@ -105,8 +206,8 @@ static void fsl_booke_start(struct op_counter_config *ctr)
         for (i = 0; i < num_counters; ++i) {
                 if (ctr[i].enabled) {
                         ctr_write(i, reset_value[i]);
-                        /* Set Each enabled counterd to only
-                         * count when the Mark bit is not set */
+                        /* Set each enabled counter to only
+                         * count when the Mark bit is *not* set */
                         set_pmc_marked(i, 1, 0);
                         pmc_start_ctr(i, 1);
                 } else {
@@ -177,6 +278,7 @@ static void fsl_booke_handle_interrupt(struct pt_regs *regs,
 
 struct op_powerpc_model op_model_fsl_booke = {
         .reg_setup              = fsl_booke_reg_setup,
+        .cpu_setup              = fsl_booke_cpu_setup,
         .start                  = fsl_booke_start,
         .stop                   = fsl_booke_stop,
         .handle_interrupt       = fsl_booke_handle_interrupt,
diff --git a/arch/powerpc/oprofile/op_model_power4.c b/arch/powerpc/oprofile/op_model_power4.c
index 6a927effcc7..356709d515b 100644
--- a/arch/powerpc/oprofile/op_model_power4.c
+++ b/arch/powerpc/oprofile/op_model_power4.c
@@ -82,7 +82,7 @@ static inline int mmcra_must_set_sample(void)
         return 0;
 }
 
-static void power4_cpu_setup(void *unused)
+static void power4_cpu_setup(struct op_counter_config *ctr)
 {
         unsigned int mmcr0 = mmcr0_val;
         unsigned long mmcra = mmcra_val;
diff --git a/arch/powerpc/oprofile/op_model_rs64.c b/arch/powerpc/oprofile/op_model_rs64.c
index 042f8f4867a..19c5ee089bc 100644
--- a/arch/powerpc/oprofile/op_model_rs64.c
+++ b/arch/powerpc/oprofile/op_model_rs64.c
@@ -102,7 +102,7 @@ static void rs64_reg_setup(struct op_counter_config *ctr,
         /* XXX setup user and kernel profiling */
 }
 
-static void rs64_cpu_setup(void *unused)
+static void rs64_cpu_setup(struct op_counter_config *ctr)
 {
         unsigned int mmcr0;