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   1 /* 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/config.h>
  25 #include <linux/init.h>
  26 #include <linux/module.h>
  27 #include <linux/prctl.h>
  28
  29 #include <asm/pgtable.h>
  30 #include <asm/uaccess.h>
  31 #include <asm/system.h>
  32 #include <asm/io.h>
  33 #include <asm/reg.h>
  34 #include <asm/xmon.h>
  35 #include <asm/pmc.h>
  36
  37 static inline u32 get_pmlca(int ctr);
  38 static inline void set_pmlca(int ctr, u32 pmlca);
  39
  40 static inline u32 get_pmlca(int ctr)
  41 {
  42         u32 pmlca;
  43
  44         switch (ctr) {
  45                 case 0:
  46                         pmlca = mfpmr(PMRN_PMLCA0);
  47                         break;
  48                 case 1:
  49                         pmlca = mfpmr(PMRN_PMLCA1);
  50                         break;
  51                 case 2:
  52                         pmlca = mfpmr(PMRN_PMLCA2);
  53                         break;
  54                 case 3:
  55                         pmlca = mfpmr(PMRN_PMLCA3);
  56                         break;
  57                 default:
  58                         panic("Bad ctr number\n");
  59         }
  60
  61         return pmlca;
  62 }
  63
  64 static inline void set_pmlca(int ctr, u32 pmlca)
  65 {
  66         switch (ctr) {
  67                 case 0:
  68                         mtpmr(PMRN_PMLCA0, pmlca);
  69                         break;
  70                 case 1:
  71                         mtpmr(PMRN_PMLCA1, pmlca);
  72                         break;
  73                 case 2:
  74                         mtpmr(PMRN_PMLCA2, pmlca);
  75                         break;
  76                 case 3:
  77                         mtpmr(PMRN_PMLCA3, pmlca);
  78                         break;
  79                 default:
  80                         panic("Bad ctr number\n");
  81         }
  82 }
  83
  84 void init_pmc_stop(int ctr)
  85 {
  86         u32 pmlca = (PMLCA_FC | PMLCA_FCS | PMLCA_FCU |
  87                         PMLCA_FCM1 | PMLCA_FCM0);
  88         u32 pmlcb = 0;
  89
  90         switch (ctr) {
  91                 case 0:
  92                         mtpmr(PMRN_PMLCA0, pmlca);
  93                         mtpmr(PMRN_PMLCB0, pmlcb);
  94                         break;
  95                 case 1:
  96                         mtpmr(PMRN_PMLCA1, pmlca);
  97                         mtpmr(PMRN_PMLCB1, pmlcb);
  98                         break;
  99                 case 2:
 100                         mtpmr(PMRN_PMLCA2, pmlca);
 101                         mtpmr(PMRN_PMLCB2, pmlcb);
 102                         break;
 103                 case 3:
 104                         mtpmr(PMRN_PMLCA3, pmlca);
 105                         mtpmr(PMRN_PMLCB3, pmlcb);
 106                         break;
 107                 default:
 108                         panic("Bad ctr number!\n");
 109         }
 110 }
 111
 112 void set_pmc_event(int ctr, int event)
 113 {
 114         u32 pmlca;
 115
 116         pmlca = get_pmlca(ctr);
 117
 118         pmlca = (pmlca & ~PMLCA_EVENT_MASK) |
 119                 ((event << PMLCA_EVENT_SHIFT) &
 120                  PMLCA_EVENT_MASK);
 121
 122         set_pmlca(ctr, pmlca);
 123 }
 124
 125 void set_pmc_user_kernel(int ctr, int user, int kernel)
 126 {
 127         u32 pmlca;
 128
 129         pmlca = get_pmlca(ctr);
 130
 131         if(user)
 132                 pmlca &= ~PMLCA_FCU;
 133         else
 134                 pmlca |= PMLCA_FCU;
 135
 136         if(kernel)
 137                 pmlca &= ~PMLCA_FCS;
 138         else
 139                 pmlca |= PMLCA_FCS;
 140
 141         set_pmlca(ctr, pmlca);
 142 }
 143
 144 void set_pmc_marked(int ctr, int mark0, int mark1)
 145 {
 146         u32 pmlca = get_pmlca(ctr);
 147
 148         if(mark0)
 149                 pmlca &= ~PMLCA_FCM0;
 150         else
 151                 pmlca |= PMLCA_FCM0;
 152
 153         if(mark1)
 154                 pmlca &= ~PMLCA_FCM1;
 155         else
 156                 pmlca |= PMLCA_FCM1;
 157
 158         set_pmlca(ctr, pmlca);
 159 }
 160
 161 void pmc_start_ctr(int ctr, int enable)
 162 {
 163         u32 pmlca = get_pmlca(ctr);
 164
 165         pmlca &= ~PMLCA_FC;
 166
 167         if (enable)
 168                 pmlca |= PMLCA_CE;
 169         else
 170                 pmlca &= ~PMLCA_CE;
 171
 172         set_pmlca(ctr, pmlca);
 173 }
 174
 175 void pmc_start_ctrs(int enable)
 176 {
 177         u32 pmgc0 = mfpmr(PMRN_PMGC0);
 178
 179         pmgc0 &= ~PMGC0_FAC;
 180         pmgc0 |= PMGC0_FCECE;
 181
 182         if (enable)
 183                 pmgc0 |= PMGC0_PMIE;
 184         else
 185                 pmgc0 &= ~PMGC0_PMIE;
 186
 187         mtpmr(PMRN_PMGC0, pmgc0);
 188 }
 189
 190 void pmc_stop_ctrs(void)
 191 {
 192         u32 pmgc0 = mfpmr(PMRN_PMGC0);
 193
 194         pmgc0 |= PMGC0_FAC;
 195
 196         pmgc0 &= ~(PMGC0_PMIE | PMGC0_FCECE);
 197
 198         mtpmr(PMRN_PMGC0, pmgc0);
 199 }
 200
 201 void dump_pmcs(void)
 202 {
 203         printk("pmgc0: %x\n", mfpmr(PMRN_PMGC0));
 204         printk("pmc\t\tpmlca\t\tpmlcb\n");
 205         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC0),
 206                         mfpmr(PMRN_PMLCA0), mfpmr(PMRN_PMLCB0));
 207         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC1),
 208                         mfpmr(PMRN_PMLCA1), mfpmr(PMRN_PMLCB1));
 209         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC2),
 210                         mfpmr(PMRN_PMLCA2), mfpmr(PMRN_PMLCB2));
 211         printk("%8x\t%8x\t%8x\n", mfpmr(PMRN_PMC3),
 212                         mfpmr(PMRN_PMLCA3), mfpmr(PMRN_PMLCB3));
 213 }
 214
 215 EXPORT_SYMBOL(init_pmc_stop);
 216 EXPORT_SYMBOL(set_pmc_event);
 217 EXPORT_SYMBOL(set_pmc_user_kernel);
 218 EXPORT_SYMBOL(set_pmc_marked);
 219 EXPORT_SYMBOL(pmc_start_ctr);
 220 EXPORT_SYMBOL(pmc_start_ctrs);
 221 EXPORT_SYMBOL(pmc_stop_ctrs);
 222 EXPORT_SYMBOL(dump_pmcs);