xref: /freebsd-11-stable/sys/i386/include/pmc_mdep.h

/*-
 * 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: head/sys/i386/include/pmc_mdep.h 184802 2008-11-09 17:37:54Z jkoshy $
 */

#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.
 */

#include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */
#include <dev/hwpmc/hwpmc_piv.h>
#include <dev/hwpmc/hwpmc_ppro.h>
#include <dev/hwpmc/hwpmc_pentium.h>
#include <dev/hwpmc/hwpmc_tsc.h>

/*
 * Intel processors implementing V2 and later of the Intel performance
 * measurement architecture have PMCs of the following classes: TSC,
 * IAF and IAP.
 */
#define	PMC_MDEP_CLASS_INDEX_TSC	0
#define	PMC_MDEP_CLASS_INDEX_K7		1
#define	PMC_MDEP_CLASS_INDEX_K8		1
#define	PMC_MDEP_CLASS_INDEX_P4		1
#define	PMC_MDEP_CLASS_INDEX_P5		1
#define	PMC_MDEP_CLASS_INDEX_P6		1
#define	PMC_MDEP_CLASS_INDEX_IAF	1
#define	PMC_MDEP_CLASS_INDEX_IAP	2

/*
 * Architecture specific extensions to <sys/pmc.h> structures.
 */

union pmc_md_op_pmcallocate  {
	struct pmc_md_amd_op_pmcallocate	pm_amd;
 	struct pmc_md_ppro_op_pmcallocate	pm_ppro;
	struct pmc_md_pentium_op_pmcallocate	pm_pentium;
	struct pmc_md_p4_op_pmcallocate		pm_p4;
	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_ppro_pmc	pm_ppro;
	struct pmc_md_pentium_pmc pm_pentium;
	struct pmc_md_p4_pmc	pm_p4;
};

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) (((va) >= USRSTACK) &&	\
	((va) < VM_MAX_KERNEL_ADDRESS))

#define	PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS)

#define	PMC_IN_TRAP_HANDLER(PC) 			\
	((PC) >= (uintptr_t) start_exceptions &&	\
	 (PC) < (uintptr_t) end_exceptions)

#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 */

/*
 * Prototypes
 */

void	start_exceptions(void), end_exceptions(void);
void	pmc_x86_lapic_enable_pmc_interrupt(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 */