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