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/systm.h> 36 37 #include <machine/pmc_mdep.h> 38 #include <machine/spr.h> 39 #include <machine/pte.h> 40 #include <machine/sr.h> 41 #include <machine/cpu.h> 42 #include <machine/vmparam.h> /* For VM_MIN_KERNEL_ADDRESS/VM_MAX_KERNEL_ADDRESS */ 43 44 #include "hwpmc_powerpc.h" 45 46 #define INKERNEL(x) (((vm_offset_t)(x)) <= VM_MAX_KERNEL_ADDRESS && \ 47 ((vm_offset_t)(x)) >= VM_MIN_KERNEL_ADDRESS) 48 #define INUSER(x) (((vm_offset_t)(x)) <= VM_MAXUSER_ADDRESS && \ 49 ((vm_offset_t)(x)) >= VM_MIN_ADDRESS) 50 51 struct powerpc_cpu **powerpc_pcpu; 52 53 int 54 pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples, 55 struct trapframe *tf) 56 { 57 int frames = 0; 58 uintptr_t *sp; 59 60 cc[frames++] = PMC_TRAPFRAME_TO_PC(tf); 61 sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf); 62 63 for (frames = 1; frames < maxsamples; frames++) { 64 if (!INKERNEL(sp)) 65 break; 66 cc[frames++] = sp[1]; 67 sp = (uintptr_t *)*sp; 68 } 69 return (frames); 70 } 71 72 static int 73 powerpc_switch_in(struct pmc_cpu *pc, struct pmc_process *pp) 74 { 75 return (0); 76 } 77 78 static int 79 powerpc_switch_out(struct pmc_cpu *pc, struct pmc_process *pp) 80 { 81 return (0); 82 } 83 84 int 85 powerpc_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc) 86 { 87 int error; 88 struct pmc_hw *phw; 89 char powerpc_name[PMC_NAME_MAX]; 90 91 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 92 ("[powerpc,%d], illegal CPU %d", __LINE__, cpu)); 93 94 phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri]; 95 snprintf(powerpc_name, sizeof(powerpc_name), "POWERPC-%d", ri); 96 if ((error = copystr(powerpc_name, pi->pm_name, PMC_NAME_MAX, 97 NULL)) != 0) 98 return error; 99 pi->pm_class = powerpc_pcpu[cpu]->pc_class; 100 if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) { 101 pi->pm_enabled = TRUE; 102 *ppmc = phw->phw_pmc; 103 } else { 104 pi->pm_enabled = FALSE; 105 *ppmc = NULL; 106 } 107 108 return (0); 109 } 110 111 int 112 powerpc_get_config(int cpu, int ri, struct pmc **ppm) 113 { 114 *ppm = powerpc_pcpu[cpu]->pc_ppcpmcs[ri].phw_pmc; 115 116 return (0); 117 } 118 119 struct pmc_mdep * 120 pmc_md_initialize() 121 { 122 struct pmc_mdep *pmc_mdep; 123 int error; 124 uint16_t vers; 125 126 /* 127 * Allocate space for pointers to PMC HW descriptors and for 128 * the MDEP structure used by MI code. 129 */ 130 powerpc_pcpu = malloc(sizeof(struct powerpc_cpu *) * pmc_cpu_max(), M_PMC, 131 M_WAITOK|M_ZERO); 132 133 /* Just one class */ 134 pmc_mdep = pmc_mdep_alloc(1); 135 136 vers = mfpvr() >> 16; 137 138 pmc_mdep->pmd_switch_in = powerpc_switch_in; 139 pmc_mdep->pmd_switch_out = powerpc_switch_out; 140 141 switch (vers) { 142 case MPC7447A: 143 case MPC7448: 144 case MPC7450: 145 case MPC7455: 146 case MPC7457: 147 error = pmc_mpc7xxx_initialize(pmc_mdep); 148 break; 149 case IBM970: 150 case IBM970FX: 151 case IBM970MP: 152 error = pmc_ppc970_initialize(pmc_mdep); 153 break; 154 default: 155 error = -1; 156 break; 157 } 158 159 if (error != 0) { 160 pmc_mdep_free(pmc_mdep); 161 pmc_mdep = NULL; 162 } 163 164 return (pmc_mdep); 165 } 166 167 void 168 pmc_md_finalize(struct pmc_mdep *md) 169 { 170 171 free(powerpc_pcpu, M_PMC); 172 powerpc_pcpu = NULL; 173 } 174 175 int 176 pmc_save_user_callchain(uintptr_t *cc, int maxsamples, 177 struct trapframe *tf) 178 { 179 uintptr_t *sp; 180 int frames = 0; 181 182 cc[frames++] = PMC_TRAPFRAME_TO_PC(tf); 183 sp = (uintptr_t *)PMC_TRAPFRAME_TO_FP(tf); 184 185 for (frames = 1; frames < maxsamples; frames++) { 186 if (!INUSER(sp)) 187 break; 188 cc[frames++] = fuword(sp + 1); 189 sp = (uintptr_t *)fuword(sp); 190 } 191 return (frames); 192 } 193