xref: /freebsd/sys/i386/include/pmc_mdep.h (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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  * PIV		Intel P4/HTT and P4/EMT64
49  * PPRO		Intel Pentium Pro, Pentium-II, Pentium-III, Celeron and
50  *		Pentium-M processors
51  * PENTIUM	Intel Pentium MMX.
52  * IAP		Intel Core/Core2/Atom programmable PMCs.
53  * IAF		Intel fixed-function PMCs.
54  * UCP		Intel Uncore programmable PMCs.
55  * UCF		Intel Uncore fixed-function PMCs.
56  */
57 
58 #include <dev/hwpmc/hwpmc_amd.h> /* K7 and K8 */
59 #include <dev/hwpmc/hwpmc_core.h>
60 #include <dev/hwpmc/hwpmc_tsc.h>
61 #include <dev/hwpmc/hwpmc_uncore.h>
62 
63 /*
64  * Intel processors implementing V2 and later of the Intel performance
65  * measurement architecture have PMCs of the following classes: TSC,
66  * IAF, IAP, UCF and UCP.
67  */
68 #define	PMC_MDEP_CLASS_INDEX_TSC	1
69 #define	PMC_MDEP_CLASS_INDEX_K7		2
70 #define	PMC_MDEP_CLASS_INDEX_K8		2
71 #define	PMC_MDEP_CLASS_INDEX_IAP	2
72 #define	PMC_MDEP_CLASS_INDEX_IAF	3
73 #define	PMC_MDEP_CLASS_INDEX_UCP	4
74 #define	PMC_MDEP_CLASS_INDEX_UCF	5
75 
76 /*
77  * Architecture specific extensions to <sys/pmc.h> structures.
78  */
79 
80 union pmc_md_op_pmcallocate  {
81 	struct pmc_md_amd_op_pmcallocate	pm_amd;
82 	struct pmc_md_iap_op_pmcallocate	pm_iap;
83 	struct pmc_md_ucf_op_pmcallocate	pm_ucf;
84 	struct pmc_md_ucp_op_pmcallocate	pm_ucp;
85 	uint64_t				__pad[4];
86 };
87 
88 /* Logging */
89 #define	PMCLOG_READADDR		PMCLOG_READ32
90 #define	PMCLOG_EMITADDR		PMCLOG_EMIT32
91 
92 #ifdef _KERNEL
93 
94 /* MD extension for 'struct pmc' */
95 union pmc_md_pmc  {
96 	struct pmc_md_amd_pmc	pm_amd;
97 	struct pmc_md_iaf_pmc	pm_iaf;
98 	struct pmc_md_iap_pmc	pm_iap;
99 	struct pmc_md_ucf_pmc	pm_ucf;
100 	struct pmc_md_ucp_pmc	pm_ucp;
101 };
102 
103 struct pmc;
104 struct pmc_mdep;
105 
106 #define	PMC_TRAPFRAME_TO_PC(TF)	((TF)->tf_eip)
107 #define	PMC_TRAPFRAME_TO_FP(TF)	((TF)->tf_ebp)
108 
109 /*
110  * The layout of the stack frame on entry into the NMI handler depends on
111  * whether a privilege level change (and consequent stack switch) was
112  * required for entry.
113  *
114  * When processing an interrupt when in user mode, the processor switches
115  * stacks, and saves the user mode stack pointer on the kernel stack.  The
116  * user mode stack pointer is then available to the interrupt handler
117  * at frame->tf_esp.
118  *
119  * When processing an interrupt while in kernel mode, the processor
120  * continues to use the existing (kernel) stack.  Therefore we determine
121  * the stack pointer for the interrupted kernel procedure by adding an
122  * offset to the current frame pointer.
123  */
124 
125 #define	PMC_TRAPFRAME_TO_USER_SP(TF)	((TF)->tf_esp)
126 #define	PMC_TRAPFRAME_TO_KERNEL_SP(TF)	((uintptr_t) &((TF)->tf_esp))
127 
128 #define	PMC_IN_KERNEL_STACK(S,START,END)		\
129 	((S) >= (START) && (S) < (END))
130 #define	PMC_IN_KERNEL(va)	INKERNEL(va)
131 
132 #define	PMC_IN_USERSPACE(va) ((va) <= VM_MAXUSER_ADDRESS)
133 
134 #define	PMC_IN_TRAP_HANDLER(PC) 			\
135 	((PC) >= (uintptr_t)start_exceptions + setidt_disp &&	\
136 	 (PC) < (uintptr_t) end_exceptions + setidt_disp)
137 
138 #define	PMC_AT_FUNCTION_PROLOGUE_PUSH_BP(I)		\
139 	(((I) & 0x00ffffff) == 0xe58955) /* pushl %ebp; movl %esp,%ebp */
140 #define	PMC_AT_FUNCTION_PROLOGUE_MOV_SP_BP(I)		\
141 	(((I) & 0x0000ffff) == 0xe589)	/* movl %esp,%ebp */
142 #define	PMC_AT_FUNCTION_EPILOGUE_RET(I)			\
143 	(((I) & 0xFF) == 0xC3)		   /* ret */
144 
145 /* Build a fake kernel trapframe from current instruction pointer. */
146 #define PMC_FAKE_TRAPFRAME(TF)						\
147 	do {								\
148 	(TF)->tf_cs = 0; (TF)->tf_eflags = 0;				\
149 	__asm __volatile("movl %%ebp,%0" : "=r" ((TF)->tf_ebp));	\
150 	__asm __volatile("movl %%esp,%0" : "=r" ((TF)->tf_esp));	\
151 	__asm __volatile("call 1f \n\t1: pop %0" : "=r"((TF)->tf_eip));	\
152 	} while (0)
153 
154 /*
155  * Prototypes
156  */
157 
158 void	start_exceptions(void), end_exceptions(void);
159 
160 struct pmc_mdep *pmc_amd_initialize(void);
161 void	pmc_amd_finalize(struct pmc_mdep *_md);
162 struct pmc_mdep *pmc_intel_initialize(void);
163 void	pmc_intel_finalize(struct pmc_mdep *_md);
164 
165 #endif /* _KERNEL */
166 #endif /* _MACHINE_PMC_MDEP_H */
167