LXR linux/arch/powerpc/include/asm/perf

   1/*
   2 * Performance event support - hardware-specific disambiguation
   3 *
   4 * For now this is a compile-time decision, but eventually it should be
   5 * runtime.  This would allow multiplatform perf event support for e300 (fsl
   6 * embedded perf counters) plus server/classic, and would accommodate
   7 * devices other than the core which provide their own performance counters.
   8 *
   9 * Copyright 2010 Freescale Semiconductor, Inc.
  10 *
  11 * This program is free software; you can redistribute it and/or
  12 * modify it under the terms of the GNU General Public License
  13 * as published by the Free Software Foundation; either version
  14 * 2 of the License, or (at your option) any later version.
  15 */
  16
  17#ifdef CONFIG_PPC_PERF_CTRS
  18#include <asm/perf_event_server.h>
  19#endif
  20
  21#ifdef CONFIG_FSL_EMB_PERF_EVENT
  22#include <asm/perf_event_fsl_emb.h>
  23#endif
  24
  25#ifdef CONFIG_PERF_EVENTS
  26#include <asm/ptrace.h>
  27#include <asm/reg.h>
  28
  29/*
  30 * Overload regs->result to specify whether we should use the MSR (result
  31 * is zero) or the SIAR (result is non zero).
  32 */
  33#define perf_arch_fetch_caller_regs(regs, __ip)                 \
  34        do {                                                    \
  35                (regs)->result = 0;                             \
  36                (regs)->nip = __ip;                             \
  37                (regs)->gpr[1] = *(unsigned long *)__get_SP();  \
  38                asm volatile("mfmsr %0" : "=r" ((regs)->msr));  \
  39        } while (0)
  40#endif
  41