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   1 /* arch/powerpc/kernel/perfmon_fsl_booke.c
   2  * Freescale Book-E Performance Monitor code
   3  *
   4  * Author: Andy Fleming
   5  * Copyright (c) 2004 Freescale Semiconductor, Inc
   6  *
   7  *  This program is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU General Public License
   9  *  as published by the Free Software Foundation; either version
  10  *  2 of the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/errno.h>
  14 #include <linux/sched.h>
  15 #include <linux/kernel.h>
  16 #include <linux/mm.h>
  17 #include <linux/stddef.h>
  18 #include <linux/unistd.h>
  19 #include <linux/ptrace.h>
  20 #include <linux/slab.h>
  21 #include <linux/user.h>
  22 #include <linux/a.out.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/prctl.h>
  27
  28 #include <asm/pgtable.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/system.h>
  31 #include <asm/io.h>
  32 #include <asm/reg.h>
  33 #include <asm/xmon.h>
  34 #include <asm/pmc.h>
  35
  36 static inline u32 get_pmlca(int ctr);
  37 static inline void set_pmlca(int ctr, u32 pmlca);
  38
  39 static inline u32 get_pmlca(int ctr)
  40 {
  41         u32 pmlca;
  42
  43         switch (ctr) {
  44                 case 0:
  45                         pmlca = mfpmr(PMRN_PMLCA0);
  46                         break;
  47                 case 1:
  48                         pmlca = mfpmr(PMRN_PMLCA1);
  49                         break;
  50                 case 2:
  51                         pmlca = mfpmr(PMRN_PMLCA2);
  52                         break;
  53                 case 3:
  54                         pmlca = mfpmr(PMRN_PMLCA3);
  55                         break;
  56                 default:
  57                         panic("Bad ctr number\n");
  58         }
  59
  60         return pmlca;
  61 }
  62
  63 static inline void set_pmlca(int ctr, u32 pmlca)
  64 {
  65         switch (ctr) {
  66                 case 0:
  67                         mtpmr(PMRN_PMLCA0, pmlca);
  68                         break;
  69                 case 1:
  70                         mtpmr(PMRN_PMLCA1, pmlca);
  71                         break;
  72                 case 2:
  73                         mtpmr(PMRN_PMLCA2, pmlca);
  74                         break;
  75                 case 3:
  76                         mtpmr(PMRN_PMLCA3, pmlca);
  77                         break;
  78                 default:
  79                         panic("Bad ctr number\n");
  80         }
  81 }
  82
  83 void init_pmc_stop(int ctr)
  84 {
  85         u32 pmlca = (PMLCA_FC | PMLCA_FCS | PMLCA_FCU |
  86                         PMLCA_FCM1 | PMLCA_FCM0);
  87         u32 pmlcb = 0;
  88
  89         switch (ctr) {
  90                 case 0:
  91                         mtpmr(PMRN_PMLCA0, pmlca);
  92                         mtpmr(PMRN_PMLCB0, pmlcb);
  93                         break;
  94                 case 1:
  95                         mtpmr(PMRN_PMLCA1, pmlca);
  96                         mtpmr(PMRN_PMLCB1, pmlcb);
  97                         break;
  98                 case 2:
  99                         mtpmr(PMRN_PMLCA2, pmlca);
 100                         mtpmr(PMRN_PMLCB2, pmlcb);
 101                         break;
 102                 case 3:
 103                         mtpmr(PMRN_PMLCA3, pmlca);
 104                         mtpmr(PMRN_PMLCB3, pmlcb);
 105                         break;
 106                 default:
 107                         panic("Bad ctr number!\n");
 108         }
 109 }
 110
 111 void set_pmc_event(int ctr, int event)
 112 {
 113         u32 pmlca;
 114
 115         pmlca = get_pmlca(ctr);
 116
 117         pmlca = (pmlca & ~PMLCA_EVENT_MASK) |
 118                 ((event << PMLCA_EVENT_SHIFT) &
 119                  PMLCA_EVENT_MASK);
 120
 121         set_pmlca(ctr, pmlca);
 122 }
 123
 124 void set_pmc_user_kernel(int ctr, int user, int kernel)
 125 {
 126         u32 pmlca;
 127
 128         pmlca = get_pmlca(ctr);
 129
 130         if(user)
 131                 pmlca &= ~PMLCA_FCU;
 132         else
 133                 pmlca |= PMLCA_FCU;
 134
 135         if(kernel)
 136                 pmlca &= ~PMLCA_FCS;
 137         else
 138                 pmlca |= PMLCA_FCS;
 139
 140         set_pmlca(ctr, pmlca);
 141 }
 142
 143 void set_pmc_marked(int ctr, int mark0, int mark1)
 144 {
 145         u32 pmlca = get_pmlca(ctr);
 146
 147         if(mark0)
 148                 pmlca &= ~PMLCA_FCM0;
 149         else
 150                 pmlca |= PMLCA_FCM0;
 151
 152         if(mark1)
 153                 pmlca &= ~PMLCA_FCM1;
 154         else
 155                 pmlca |= PMLCA_FCM1;
 156
 157         set_pmlca(ctr, pmlca);
 158 }
 159
 160 void pmc_start_ctr(int ctr, int enable)
 161 {
 162         u32 pmlca = get_pmlca(ctr);
 163
 164         pmlca &= ~PMLCA_FC;
 165
 166         if (enable)
 167                 pmlca |= PMLCA_CE;
 168         else
 169                 pmlca &= ~PMLCA_CE;
 170
 171         set_pmlca(ctr, pmlca);
 172 }
 173
 174 void pmc_start_ctrs(int enable)
 175 {
 176         u32 pmgc0 = mfpmr(PMRN_PMGC0);
 177
 178         pmgc0 &= ~PMGC0_FAC;
 179         pmgc0 |= PMGC0_FCECE;
 180
 181         if (enable)
 182                 pmgc0 |= PMGC0_PMIE;
 183         else
 184                 pmgc0 &= ~PMGC0_PMIE;
 185
 186         mtpmr(PMRN_PMGC0, pmgc0);
 187 }
 188
 189 void pmc_stop_ctrs(void)
 190 {
 191         u32 pmgc0 = mfpmr(PMRN_PMGC0);
 192
 193         pmgc0 |= PMGC0_FAC;
 194
 195         pmgc0 &= ~(PMGC0_PMIE | PMGC0_FCECE);
 196
 197         mtpmr(PMRN_PMGC0, pmgc0);
 198 }
 199
 200 void dump_pmcs(void)
 201 {
 202         printk("pmgc0: %x\n", mfpmr(PMRN_PMGC0));
 203         printk("pmc\t\tpmlca\t\tpmlcb\n");
 204         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC0),
 205                         mfpmr(PMRN_PMLCA0), mfpmr(PMRN_PMLCB0));
 206         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC1),
 207                         mfpmr(PMRN_PMLCA1), mfpmr(PMRN_PMLCB1));
 208         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC2),
 209                         mfpmr(PMRN_PMLCA2), mfpmr(PMRN_PMLCB2));
 210         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC3),
 211                         mfpmr(PMRN_PMLCA3), mfpmr(PMRN_PMLCB3));
 212 }
 213
 214 EXPORT_SYMBOL(init_pmc_stop);
 215 EXPORT_SYMBOL(set_pmc_event);
 216 EXPORT_SYMBOL(set_pmc_user_kernel);
 217 EXPORT_SYMBOL(set_pmc_marked);
 218 EXPORT_SYMBOL(pmc_start_ctr);
 219 EXPORT_SYMBOL(pmc_start_ctrs);
 220 EXPORT_SYMBOL(pmc_stop_ctrs);
 221 EXPORT_SYMBOL(dump_pmcs);