FreeBSD/Linux Kernel Cross Reference
sys/i386/include/pmc_mdep.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2003-2005,2008 Joseph Koshy
      * Copyright (c) 2007 The FreeBSD Foundation
      * All rights reserved.
      *
      * Portions of this software were developed by A. Joseph Koshy under
      * sponsorship from the FreeBSD Foundation and Google, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _MACHINE_PMC_MDEP_H
    #define _MACHINE_PMC_MDEP_H 1
    
    #ifdef  _KERNEL
    struct pmc_mdep;
    #endif
    
    /*
     * On the i386 platform we support the following PMCs.
     *
     * TSC          The timestamp counter
     * K7           AMD Athlon XP/MP and other 32 bit processors.
     * K8           AMD Athlon64 and Opteron PMCs in 32 bit mode.
     * PIV          Intel P4/HTT and P4/EMT64
     * PPRO         Intel Pentium Pro, Pentium-II, Pentium-III, Celeron and
     *              Pentium-M processors
     * PENTIUM      Intel Pentium MMX.
     * IAP          Intel Core/Core2/Atom programmable PMCs.
     * IAF          Intel fixed-function PMCs.
     * UCP          Intel Uncore programmable PMCs.
     * UCF          Intel Uncore fixed-function PMCs.
     */
    
    #include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */
    #include <dev/hwpmc/hwpmc_core.h>
    #include <dev/hwpmc/hwpmc_tsc.h>
    #include <dev/hwpmc/hwpmc_uncore.h>
    
    /*
     * Intel processors implementing V2 and later of the Intel performance
     * measurement architecture have PMCs of the following classes: TSC,
     * IAF, IAP, UCF and UCP.
     */
    #define PMC_MDEP_CLASS_INDEX_TSC        1
    #define PMC_MDEP_CLASS_INDEX_K7         2
    #define PMC_MDEP_CLASS_INDEX_K8         2
    #define PMC_MDEP_CLASS_INDEX_IAP        2
    #define PMC_MDEP_CLASS_INDEX_IAF        3
    #define PMC_MDEP_CLASS_INDEX_UCP        4
    #define PMC_MDEP_CLASS_INDEX_UCF        5
    
    /*
     * Architecture specific extensions to <sys/pmc.h> structures.
     */
    
    union pmc_md_op_pmcallocate  {
            struct pmc_md_amd_op_pmcallocate        pm_amd;
            struct pmc_md_iap_op_pmcallocate        pm_iap;
            struct pmc_md_ucf_op_pmcallocate        pm_ucf;
            struct pmc_md_ucp_op_pmcallocate        pm_ucp;
            uint64_t                                __pad[4];
    };
    
    /* Logging */
    #define PMCLOG_READADDR         PMCLOG_READ32
    #define PMCLOG_EMITADDR         PMCLOG_EMIT32
    
    #ifdef _KERNEL
    
    /* MD extension for 'struct pmc' */
    union pmc_md_pmc  {
            struct pmc_md_amd_pmc   pm_amd;
            struct pmc_md_iaf_pmc   pm_iaf;
            struct pmc_md_iap_pmc   pm_iap;
            struct pmc_md_ucf_pmc   pm_ucf;
           struct pmc_md_ucp_pmc   pm_ucp;
   };
   
   struct pmc;
   struct pmc_mdep;
   
   #define PMC_TRAPFRAME_TO_PC(TF) ((TF)->tf_eip)
   #define PMC_TRAPFRAME_TO_FP(TF) ((TF)->tf_ebp)
   
   /*
    * The layout of the stack frame on entry into the NMI handler depends on
    * whether a privilege level change (and consequent stack switch) was
    * required for entry.
    *
    * When processing an interrupt when in user mode, the processor switches
    * stacks, and saves the user mode stack pointer on the kernel stack.  The
    * user mode stack pointer is then available to the interrupt handler
    * at frame->tf_esp.
    *
    * When processing an interrupt while in kernel mode, the processor
    * continues to use the existing (kernel) stack.  Therefore we determine
    * the stack pointer for the interrupted kernel procedure by adding an
    * offset to the current frame pointer.
    */
   
   #define PMC_TRAPFRAME_TO_USER_SP(TF)    ((TF)->tf_esp)
   #define PMC_TRAPFRAME_TO_KERNEL_SP(TF)  ((uintptr_t) &((TF)->tf_esp))
   
   #define PMC_IN_KERNEL_STACK(S,START,END)                \
           ((S) >= (START) && (S) < (END))
   #define PMC_IN_KERNEL(va)       INKERNEL(va)
   
   #define PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS)
   
   #define PMC_IN_TRAP_HANDLER(PC)                         \
           ((PC) >= (uintptr_t)start_exceptions + setidt_disp &&   \
            (PC) < (uintptr_t) end_exceptions + setidt_disp)
   
   #define PMC_AT_FUNCTION_PROLOGUE_PUSH_BP(I)             \
           (((I) & 0x00ffffff) == 0xe58955) /* pushl %ebp; movl %esp,%ebp */
   #define PMC_AT_FUNCTION_PROLOGUE_MOV_SP_BP(I)           \
           (((I) & 0x0000ffff) == 0xe589)  /* movl %esp,%ebp */
   #define PMC_AT_FUNCTION_EPILOGUE_RET(I)                 \
           (((I) & 0xFF) == 0xC3)             /* ret */
   
   /* Build a fake kernel trapframe from current instruction pointer. */
   #define PMC_FAKE_TRAPFRAME(TF)                                          \
           do {                                                            \
           (TF)->tf_cs = 0; (TF)->tf_eflags = 0;                           \
           __asm __volatile("movl %%ebp,%0" : "=r" ((TF)->tf_ebp));        \
           __asm __volatile("movl %%esp,%0" : "=r" ((TF)->tf_esp));        \
           __asm __volatile("call 1f \n\t1: pop %0" : "=r"((TF)->tf_eip)); \
           } while (0)
   
   /*
    * Prototypes
    */
   
   void    start_exceptions(void), end_exceptions(void);
   
   struct pmc_mdep *pmc_amd_initialize(void);
   void    pmc_amd_finalize(struct pmc_mdep *_md);
   struct pmc_mdep *pmc_intel_initialize(void);
   void    pmc_intel_finalize(struct pmc_mdep *_md);
   
   #endif /* _KERNEL */
   #endif /* _MACHINE_PMC_MDEP_H */

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