1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2003-2005,2008 Joseph Koshy 5 * Copyright (c) 2007 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by A. Joseph Koshy under 9 * sponsorship from the FreeBSD Foundation and Google, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 35 #ifndef _MACHINE_PMC_MDEP_H 36 #define _MACHINE_PMC_MDEP_H 1 37 38 #ifdef _KERNEL 39 struct pmc_mdep; 40 #endif 41 42 /* 43 * On the i386 platform we support the following PMCs. 44 * 45 * TSC The timestamp counter 46 * K7 AMD Athlon XP/MP and other 32 bit processors. 47 * K8 AMD Athlon64 and Opteron PMCs in 32 bit mode. 48 * IAP Intel Core/Core2/Atom programmable PMCs. 49 * IAF Intel fixed-function PMCs. 50 * UCP Intel Uncore programmable PMCs. 51 * UCF Intel Uncore fixed-function PMCs. 52 */ 53 54 #include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */ 55 #include <dev/hwpmc/hwpmc_core.h> 56 #include <dev/hwpmc/hwpmc_tsc.h> 57 #include <dev/hwpmc/hwpmc_uncore.h> 58 59 /* 60 * Intel processors implementing V2 and later of the Intel performance 61 * measurement architecture have PMCs of the following classes: TSC, 62 * IAF, IAP, UCF and UCP. 63 */ 64 #define PMC_MDEP_CLASS_INDEX_TSC 1 65 #define PMC_MDEP_CLASS_INDEX_K7 2 66 #define PMC_MDEP_CLASS_INDEX_K8 2 67 #define PMC_MDEP_CLASS_INDEX_IAP 2 68 #define PMC_MDEP_CLASS_INDEX_IAF 3 69 #define PMC_MDEP_CLASS_INDEX_UCP 4 70 #define PMC_MDEP_CLASS_INDEX_UCF 5 71 72 /* 73 * Architecture specific extensions to <sys/pmc.h> structures. 74 */ 75 76 union pmc_md_op_pmcallocate { 77 struct pmc_md_amd_op_pmcallocate pm_amd; 78 struct pmc_md_iap_op_pmcallocate pm_iap; 79 struct pmc_md_ucf_op_pmcallocate pm_ucf; 80 struct pmc_md_ucp_op_pmcallocate pm_ucp; 81 uint64_t __pad[4]; 82 }; 83 84 /* Logging */ 85 #define PMCLOG_READADDR PMCLOG_READ32 86 #define PMCLOG_EMITADDR PMCLOG_EMIT32 87 88 #ifdef _KERNEL 89 90 /* MD extension for 'struct pmc' */ 91 union pmc_md_pmc { 92 struct pmc_md_amd_pmc pm_amd; 93 struct pmc_md_iaf_pmc pm_iaf; 94 struct pmc_md_iap_pmc pm_iap; 95 struct pmc_md_ucf_pmc pm_ucf; 96 struct pmc_md_ucp_pmc pm_ucp; 97 }; 98 99 struct pmc; 100 struct pmc_mdep; 101 102 #define PMC_TRAPFRAME_TO_PC(TF) ((TF)->tf_eip) 103 #define PMC_TRAPFRAME_TO_FP(TF) ((TF)->tf_ebp) 104 105 /* 106 * The layout of the stack frame on entry into the NMI handler depends on 107 * whether a privilege level change (and consequent stack switch) was 108 * required for entry. 109 * 110 * When processing an interrupt when in user mode, the processor switches 111 * stacks, and saves the user mode stack pointer on the kernel stack. The 112 * user mode stack pointer is then available to the interrupt handler 113 * at frame->tf_esp. 114 * 115 * When processing an interrupt while in kernel mode, the processor 116 * continues to use the existing (kernel) stack. Therefore we determine 117 * the stack pointer for the interrupted kernel procedure by adding an 118 * offset to the current frame pointer. 119 */ 120 121 #define PMC_TRAPFRAME_TO_USER_SP(TF) ((TF)->tf_esp) 122 #define PMC_TRAPFRAME_TO_KERNEL_SP(TF) ((uintptr_t) &((TF)->tf_esp)) 123 124 #define PMC_IN_KERNEL_STACK(va) kstack_contains(curthread, (va), sizeof(va)) 125 #define PMC_IN_KERNEL(va) INKERNEL(va) 126 #define PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS) 127 128 #define PMC_IN_TRAP_HANDLER(PC) \ 129 ((PC) >= (uintptr_t)start_exceptions + setidt_disp && \ 130 (PC) < (uintptr_t) end_exceptions + setidt_disp) 131 132 #define PMC_AT_FUNCTION_PROLOGUE_PUSH_BP(I) \ 133 (((I) & 0x00ffffff) == 0xe58955) /* pushl %ebp; movl %esp,%ebp */ 134 #define PMC_AT_FUNCTION_PROLOGUE_MOV_SP_BP(I) \ 135 (((I) & 0x0000ffff) == 0xe589) /* movl %esp,%ebp */ 136 #define PMC_AT_FUNCTION_EPILOGUE_RET(I) \ 137 (((I) & 0xFF) == 0xC3) /* ret */ 138 139 /* Build a fake kernel trapframe from current instruction pointer. */ 140 #define PMC_FAKE_TRAPFRAME(TF) \ 141 do { \ 142 (TF)->tf_cs = 0; (TF)->tf_eflags = 0; \ 143 __asm __volatile("movl %%ebp,%0" : "=r" ((TF)->tf_ebp)); \ 144 __asm __volatile("movl %%esp,%0" : "=r" ((TF)->tf_esp)); \ 145 __asm __volatile("call 1f \n\t1: pop %0" : "=r"((TF)->tf_eip)); \ 146 } while (0) 147 148 /* 149 * Prototypes 150 */ 151 152 void start_exceptions(void), end_exceptions(void); 153 154 struct pmc_mdep *pmc_amd_initialize(void); 155 void pmc_amd_finalize(struct pmc_mdep *_md); 156 struct pmc_mdep *pmc_intel_initialize(void); 157 void pmc_intel_finalize(struct pmc_mdep *_md); 158 159 #endif /* _KERNEL */ 160 #endif /* _MACHINE_PMC_MDEP_H */ 161