aba91805aa
This existing helper function is preferable to the hand-rolled calculation of the kstack bounds. Make some small style improvements while here. Notably, rename every instance of "r", the return address, to "ra". Tidy the includes in the affected files. Reviewed by: jkoshy MFC after: 2 weeks Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D39909
161 lines
5.4 KiB
C
161 lines
5.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2003-2005,2008 Joseph Koshy
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* Copyright (c) 2007 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by A. Joseph Koshy under
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* sponsorship from the FreeBSD Foundation and Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PMC_MDEP_H
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#define _MACHINE_PMC_MDEP_H 1
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#ifdef _KERNEL
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struct pmc_mdep;
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#endif
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/*
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* On the i386 platform we support the following PMCs.
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*
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* TSC The timestamp counter
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* K7 AMD Athlon XP/MP and other 32 bit processors.
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* K8 AMD Athlon64 and Opteron PMCs in 32 bit mode.
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* IAP Intel Core/Core2/Atom programmable PMCs.
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* IAF Intel fixed-function PMCs.
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* UCP Intel Uncore programmable PMCs.
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* UCF Intel Uncore fixed-function PMCs.
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*/
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#include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */
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#include <dev/hwpmc/hwpmc_core.h>
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#include <dev/hwpmc/hwpmc_tsc.h>
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#include <dev/hwpmc/hwpmc_uncore.h>
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/*
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* Intel processors implementing V2 and later of the Intel performance
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* measurement architecture have PMCs of the following classes: TSC,
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* IAF, IAP, UCF and UCP.
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*/
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#define PMC_MDEP_CLASS_INDEX_TSC 1
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#define PMC_MDEP_CLASS_INDEX_K7 2
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#define PMC_MDEP_CLASS_INDEX_K8 2
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#define PMC_MDEP_CLASS_INDEX_IAP 2
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#define PMC_MDEP_CLASS_INDEX_IAF 3
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#define PMC_MDEP_CLASS_INDEX_UCP 4
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#define PMC_MDEP_CLASS_INDEX_UCF 5
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/*
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* Architecture specific extensions to <sys/pmc.h> structures.
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*/
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union pmc_md_op_pmcallocate {
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struct pmc_md_amd_op_pmcallocate pm_amd;
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struct pmc_md_iap_op_pmcallocate pm_iap;
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struct pmc_md_ucf_op_pmcallocate pm_ucf;
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struct pmc_md_ucp_op_pmcallocate pm_ucp;
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uint64_t __pad[4];
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};
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/* Logging */
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#define PMCLOG_READADDR PMCLOG_READ32
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#define PMCLOG_EMITADDR PMCLOG_EMIT32
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#ifdef _KERNEL
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/* MD extension for 'struct pmc' */
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union pmc_md_pmc {
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struct pmc_md_amd_pmc pm_amd;
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struct pmc_md_iaf_pmc pm_iaf;
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struct pmc_md_iap_pmc pm_iap;
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struct pmc_md_ucf_pmc pm_ucf;
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struct pmc_md_ucp_pmc pm_ucp;
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};
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struct pmc;
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struct pmc_mdep;
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#define PMC_TRAPFRAME_TO_PC(TF) ((TF)->tf_eip)
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#define PMC_TRAPFRAME_TO_FP(TF) ((TF)->tf_ebp)
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/*
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* The layout of the stack frame on entry into the NMI handler depends on
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* whether a privilege level change (and consequent stack switch) was
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* required for entry.
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*
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* When processing an interrupt when in user mode, the processor switches
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* stacks, and saves the user mode stack pointer on the kernel stack. The
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* user mode stack pointer is then available to the interrupt handler
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* at frame->tf_esp.
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*
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* When processing an interrupt while in kernel mode, the processor
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* continues to use the existing (kernel) stack. Therefore we determine
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* the stack pointer for the interrupted kernel procedure by adding an
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* offset to the current frame pointer.
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*/
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#define PMC_TRAPFRAME_TO_USER_SP(TF) ((TF)->tf_esp)
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#define PMC_TRAPFRAME_TO_KERNEL_SP(TF) ((uintptr_t) &((TF)->tf_esp))
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#define PMC_IN_KERNEL_STACK(va) kstack_contains(curthread, (va), sizeof(va))
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#define PMC_IN_KERNEL(va) INKERNEL(va)
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#define PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS)
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#define PMC_IN_TRAP_HANDLER(PC) \
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((PC) >= (uintptr_t)start_exceptions + setidt_disp && \
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(PC) < (uintptr_t) end_exceptions + setidt_disp)
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#define PMC_AT_FUNCTION_PROLOGUE_PUSH_BP(I) \
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(((I) & 0x00ffffff) == 0xe58955) /* pushl %ebp; movl %esp,%ebp */
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#define PMC_AT_FUNCTION_PROLOGUE_MOV_SP_BP(I) \
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(((I) & 0x0000ffff) == 0xe589) /* movl %esp,%ebp */
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#define PMC_AT_FUNCTION_EPILOGUE_RET(I) \
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(((I) & 0xFF) == 0xC3) /* ret */
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/* Build a fake kernel trapframe from current instruction pointer. */
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#define PMC_FAKE_TRAPFRAME(TF) \
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do { \
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(TF)->tf_cs = 0; (TF)->tf_eflags = 0; \
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__asm __volatile("movl %%ebp,%0" : "=r" ((TF)->tf_ebp)); \
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__asm __volatile("movl %%esp,%0" : "=r" ((TF)->tf_esp)); \
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__asm __volatile("call 1f \n\t1: pop %0" : "=r"((TF)->tf_eip)); \
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} while (0)
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/*
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* Prototypes
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*/
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void start_exceptions(void), end_exceptions(void);
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struct pmc_mdep *pmc_amd_initialize(void);
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void pmc_amd_finalize(struct pmc_mdep *_md);
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struct pmc_mdep *pmc_intel_initialize(void);
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void pmc_intel_finalize(struct pmc_mdep *_md);
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#endif /* _KERNEL */
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#endif /* _MACHINE_PMC_MDEP_H */
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