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 33 #ifndef _MACHINE_PMC_MDEP_H 34 #define _MACHINE_PMC_MDEP_H 1 35 36 #ifdef _KERNEL 37 struct pmc_mdep; 38 #endif 39 40 /* 41 * On the i386 platform we support the following PMCs. 42 * 43 * TSC The timestamp counter 44 * K7 AMD Athlon XP/MP and other 32 bit processors. 45 * K8 AMD Athlon64 and Opteron PMCs in 32 bit mode. 46 * IAP Intel Core/Core2/Atom programmable PMCs. 47 * IAF Intel fixed-function PMCs. 48 * UCP Intel Uncore programmable PMCs. 49 * UCF Intel Uncore fixed-function PMCs. 50 */ 51 52 #include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */ 53 #include <dev/hwpmc/hwpmc_core.h> 54 #include <dev/hwpmc/hwpmc_tsc.h> 55 #include <dev/hwpmc/hwpmc_uncore.h> 56 57 /* 58 * Intel processors implementing V2 and later of the Intel performance 59 * measurement architecture have PMCs of the following classes: TSC, 60 * IAF, IAP, UCF and UCP. 61 */ 62 #define PMC_MDEP_CLASS_INDEX_TSC 1 63 #define PMC_MDEP_CLASS_INDEX_K7 2 64 #define PMC_MDEP_CLASS_INDEX_K8 2 65 #define PMC_MDEP_CLASS_INDEX_IAP 2 66 #define PMC_MDEP_CLASS_INDEX_IAF 3 67 #define PMC_MDEP_CLASS_INDEX_UCP 4 68 #define PMC_MDEP_CLASS_INDEX_UCF 5 69 70 /* 71 * Architecture specific extensions to <sys/pmc.h> structures. 72 */ 73 74 union pmc_md_op_pmcallocate { 75 struct pmc_md_amd_op_pmcallocate pm_amd; 76 struct pmc_md_iap_op_pmcallocate pm_iap; 77 struct pmc_md_ucf_op_pmcallocate pm_ucf; 78 struct pmc_md_ucp_op_pmcallocate pm_ucp; 79 uint64_t __pad[4]; 80 }; 81 82 /* Logging */ 83 #define PMCLOG_READADDR PMCLOG_READ32 84 #define PMCLOG_EMITADDR PMCLOG_EMIT32 85 86 #ifdef _KERNEL 87 88 /* MD extension for 'struct pmc' */ 89 union pmc_md_pmc { 90 struct pmc_md_amd_pmc pm_amd; 91 struct pmc_md_iaf_pmc pm_iaf; 92 struct pmc_md_iap_pmc pm_iap; 93 struct pmc_md_ucf_pmc pm_ucf; 94 struct pmc_md_ucp_pmc pm_ucp; 95 }; 96 97 struct pmc; 98 struct pmc_mdep; 99 100 #define PMC_TRAPFRAME_TO_PC(TF) ((TF)->tf_eip) 101 #define PMC_TRAPFRAME_TO_FP(TF) ((TF)->tf_ebp) 102 103 /* 104 * The layout of the stack frame on entry into the NMI handler depends on 105 * whether a privilege level change (and consequent stack switch) was 106 * required for entry. 107 * 108 * When processing an interrupt when in user mode, the processor switches 109 * stacks, and saves the user mode stack pointer on the kernel stack. The 110 * user mode stack pointer is then available to the interrupt handler 111 * at frame->tf_esp. 112 * 113 * When processing an interrupt while in kernel mode, the processor 114 * continues to use the existing (kernel) stack. Therefore we determine 115 * the stack pointer for the interrupted kernel procedure by adding an 116 * offset to the current frame pointer. 117 */ 118 119 #define PMC_TRAPFRAME_TO_USER_SP(TF) ((TF)->tf_esp) 120 #define PMC_TRAPFRAME_TO_KERNEL_SP(TF) ((uintptr_t) &((TF)->tf_esp)) 121 122 #define PMC_IN_KERNEL_STACK(va) kstack_contains(curthread, (va), sizeof(va)) 123 #define PMC_IN_KERNEL(va) INKERNEL(va) 124 #define PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS) 125 126 #define PMC_IN_TRAP_HANDLER(PC) \ 127 ((PC) >= (uintptr_t)start_exceptions + setidt_disp && \ 128 (PC) < (uintptr_t) end_exceptions + setidt_disp) 129 130 #define PMC_AT_FUNCTION_PROLOGUE_PUSH_BP(I) \ 131 (((I) & 0x00ffffff) == 0xe58955) /* pushl %ebp; movl %esp,%ebp */ 132 #define PMC_AT_FUNCTION_PROLOGUE_MOV_SP_BP(I) \ 133 (((I) & 0x0000ffff) == 0xe589) /* movl %esp,%ebp */ 134 #define PMC_AT_FUNCTION_EPILOGUE_RET(I) \ 135 (((I) & 0xFF) == 0xC3) /* ret */ 136 137 /* Build a fake kernel trapframe from current instruction pointer. */ 138 #define PMC_FAKE_TRAPFRAME(TF) \ 139 do { \ 140 (TF)->tf_cs = 0; (TF)->tf_eflags = 0; \ 141 __asm __volatile("movl %%ebp,%0" : "=r" ((TF)->tf_ebp)); \ 142 __asm __volatile("movl %%esp,%0" : "=r" ((TF)->tf_esp)); \ 143 __asm __volatile("call 1f \n\t1: pop %0" : "=r"((TF)->tf_eip)); \ 144 } while (0) 145 146 /* 147 * Prototypes 148 */ 149 150 void start_exceptions(void), end_exceptions(void); 151 152 struct pmc_mdep *pmc_amd_initialize(void); 153 void pmc_amd_finalize(struct pmc_mdep *_md); 154 struct pmc_mdep *pmc_intel_initialize(void); 155 void pmc_intel_finalize(struct pmc_mdep *_md); 156 157 #endif /* _KERNEL */ 158 #endif /* _MACHINE_PMC_MDEP_H */ 159