1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011,2013 Justin Hibbits 5 * Copyright (c) 2005, Joseph Koshy 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/pmc.h> 36 #include <sys/pmckern.h> 37 #include <sys/sysent.h> 38 #include <sys/systm.h> 39 40 #include <machine/pmc_mdep.h> 41 #include <machine/spr.h> 42 #include <machine/pte.h> 43 #include <machine/sr.h> 44 #include <machine/cpu.h> 45 #include <machine/stack.h> 46 47 #include "hwpmc_powerpc.h" 48 49 #ifdef __powerpc64__ 50 #define OFFSET 4 /* Account for the TOC reload slot */ 51 #else 52 #define OFFSET 0 53 #endif 54 55 struct powerpc_cpu **powerpc_pcpu; 56 57 int 58 pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples, 59 struct trapframe *tf) 60 { 61 uintptr_t *osp, *sp; 62 uintptr_t pc; 63 int frames = 0; 64 65 cc[frames++] = PMC_TRAPFRAME_TO_PC(tf); 66 sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf); 67 osp = (uintptr_t *)PAGE_SIZE; 68 69 for (; frames < maxsamples; frames++) { 70 if (sp <= osp) 71 break; 72 #ifdef __powerpc64__ 73 pc = sp[2]; 74 #else 75 pc = sp[1]; 76 #endif 77 if ((pc & 3) || (pc < 0x100)) 78 break; 79 80 /* 81 * trapexit() and asttrapexit() are sentinels 82 * for kernel stack tracing. 83 * */ 84 if (pc + OFFSET == (uintptr_t) &trapexit || 85 pc + OFFSET == (uintptr_t) &asttrapexit) 86 break; 87 88 cc[frames] = pc; 89 osp = sp; 90 sp = (uintptr_t *)*sp; 91 } 92 return (frames); 93 } 94 95 static int 96 powerpc_switch_in(struct pmc_cpu *pc, struct pmc_process *pp) 97 { 98 99 return (0); 100 } 101 102 static int 103 powerpc_switch_out(struct pmc_cpu *pc, struct pmc_process *pp) 104 { 105 106 return (0); 107 } 108 109 int 110 powerpc_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc) 111 { 112 int error; 113 struct pmc_hw *phw; 114 char powerpc_name[PMC_NAME_MAX]; 115 116 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 117 ("[powerpc,%d], illegal CPU %d", __LINE__, cpu)); 118 119 phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri]; 120 snprintf(powerpc_name, sizeof(powerpc_name), "POWERPC-%d", ri); 121 if ((error = copystr(powerpc_name, pi->pm_name, PMC_NAME_MAX, 122 NULL)) != 0) 123 return error; 124 pi->pm_class = powerpc_pcpu[cpu]->pc_class; 125 if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) { 126 pi->pm_enabled = TRUE; 127 *ppmc = phw->phw_pmc; 128 } else { 129 pi->pm_enabled = FALSE; 130 *ppmc = NULL; 131 } 132 133 return (0); 134 } 135 136 int 137 powerpc_get_config(int cpu, int ri, struct pmc **ppm) 138 { 139 140 *ppm = powerpc_pcpu[cpu]->pc_ppcpmcs[ri].phw_pmc; 141 142 return (0); 143 } 144 145 struct pmc_mdep * 146 pmc_md_initialize() 147 { 148 struct pmc_mdep *pmc_mdep; 149 int error; 150 uint16_t vers; 151 152 /* 153 * Allocate space for pointers to PMC HW descriptors and for 154 * the MDEP structure used by MI code. 155 */ 156 powerpc_pcpu = malloc(sizeof(struct powerpc_cpu *) * pmc_cpu_max(), M_PMC, 157 M_WAITOK|M_ZERO); 158 159 /* Just one class */ 160 pmc_mdep = pmc_mdep_alloc(1); 161 162 vers = mfpvr() >> 16; 163 164 pmc_mdep->pmd_switch_in = powerpc_switch_in; 165 pmc_mdep->pmd_switch_out = powerpc_switch_out; 166 167 switch (vers) { 168 case MPC7447A: 169 case MPC7448: 170 case MPC7450: 171 case MPC7455: 172 case MPC7457: 173 error = pmc_mpc7xxx_initialize(pmc_mdep); 174 break; 175 case IBM970: 176 case IBM970FX: 177 case IBM970MP: 178 error = pmc_ppc970_initialize(pmc_mdep); 179 break; 180 case FSL_E500v1: 181 case FSL_E500v2: 182 case FSL_E500mc: 183 case FSL_E5500: 184 error = pmc_e500_initialize(pmc_mdep); 185 break; 186 default: 187 error = -1; 188 break; 189 } 190 191 if (error != 0) { 192 pmc_mdep_free(pmc_mdep); 193 pmc_mdep = NULL; 194 } 195 196 return (pmc_mdep); 197 } 198 199 void 200 pmc_md_finalize(struct pmc_mdep *md) 201 { 202 203 free(powerpc_pcpu, M_PMC); 204 powerpc_pcpu = NULL; 205 } 206 207 int 208 pmc_save_user_callchain(uintptr_t *cc, int maxsamples, 209 struct trapframe *tf) 210 { 211 uintptr_t *osp, *sp; 212 int frames = 0; 213 214 cc[frames++] = PMC_TRAPFRAME_TO_PC(tf); 215 sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf); 216 osp = NULL; 217 218 for (; frames < maxsamples; frames++) { 219 if (sp <= osp) 220 break; 221 osp = sp; 222 #ifdef __powerpc64__ 223 /* Check if 32-bit mode. */ 224 if (!(tf->srr1 & PSL_SF)) { 225 cc[frames] = fuword32((uint32_t *)sp + 1); 226 sp = (uintptr_t *)(uintptr_t)fuword32(sp); 227 } else { 228 cc[frames] = fuword(sp + 2); 229 sp = (uintptr_t *)fuword(sp); 230 } 231 #else 232 cc[frames] = fuword32((uint32_t *)sp + 1); 233 sp = (uintptr_t *)fuword32(sp); 234 #endif 235 } 236 237 return (frames); 238 } 239