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 49 int 50 pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples, 51 struct trapframe *tf) 52 { 53 int frames = 0; 54 uintptr_t *sp; 55 56 cc[frames++] = tf->srr0; 57 sp = (uintptr_t *)tf->fixreg[1]; 58 59 for (frames = 1; frames < maxsamples; frames++) { 60 if (!INKERNEL(sp)) 61 break; 62 cc[frames++] = *(sp + 1); 63 sp = (uintptr_t *)*sp; 64 } 65 return (frames); 66 } 67 68 static int 69 powerpc_switch_in(struct pmc_cpu *pc, struct pmc_process *pp) 70 { 71 return (0); 72 } 73 74 static int 75 powerpc_switch_out(struct pmc_cpu *pc, struct pmc_process *pp) 76 { 77 return (0); 78 } 79 80 int 81 powerpc_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc) 82 { 83 int error; 84 struct pmc_hw *phw; 85 char powerpc_name[PMC_NAME_MAX]; 86 87 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 88 ("[powerpc,%d], illegal CPU %d", __LINE__, cpu)); 89 90 phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri]; 91 snprintf(powerpc_name, sizeof(powerpc_name), "POWERPC-%d", ri); 92 if ((error = copystr(powerpc_name, pi->pm_name, PMC_NAME_MAX, 93 NULL)) != 0) 94 return error; 95 pi->pm_class = PMC_CLASS_PPC7450; 96 if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) { 97 pi->pm_enabled = TRUE; 98 *ppmc = phw->phw_pmc; 99 } else { 100 pi->pm_enabled = FALSE; 101 *ppmc = NULL; 102 } 103 104 return (0); 105 } 106 107 int 108 powerpc_get_config(int cpu, int ri, struct pmc **ppm) 109 { 110 *ppm = powerpc_pcpu[cpu]->pc_ppcpmcs[ri].phw_pmc; 111 112 return (0); 113 } 114 115 struct pmc_mdep * 116 pmc_md_initialize() 117 { 118 struct pmc_mdep *pmc_mdep; 119 int error; 120 uint16_t vers; 121 122 /* 123 * Allocate space for pointers to PMC HW descriptors and for 124 * the MDEP structure used by MI code. 125 */ 126 powerpc_pcpu = malloc(sizeof(struct powerpc_cpu *) * pmc_cpu_max(), M_PMC, 127 M_WAITOK|M_ZERO); 128 129 /* Just one class */ 130 pmc_mdep = pmc_mdep_alloc(1); 131 132 pmc_mdep->pmd_cputype = PMC_CPU_PPC_7450; 133 134 vers = mfpvr() >> 16; 135 136 pmc_mdep->pmd_switch_in = powerpc_switch_in; 137 pmc_mdep->pmd_switch_out = powerpc_switch_out; 138 139 switch (vers) { 140 case MPC7447A: 141 case MPC7448: 142 case MPC7450: 143 case MPC7455: 144 case MPC7457: 145 error = pmc_mpc7xxx_initialize(pmc_mdep); 146 case IBM970: 147 case IBM970FX: 148 case IBM970MP: 149 default: 150 error = -1; 151 break; 152 } 153 154 if (error != 0) { 155 pmc_mdep_free(pmc_mdep); 156 pmc_mdep = NULL; 157 return NULL; 158 } 159 160 return (pmc_mdep); 161 } 162 163 void 164 pmc_md_finalize(struct pmc_mdep *md) 165 { 166 free(md, M_PMC); 167 } 168 169 int 170 pmc_save_user_callchain(uintptr_t *cc, int maxsamples, 171 struct trapframe *tf) 172 { 173 (void) cc; 174 (void) maxsamples; 175 (void) tf; 176 return (0); 177 } 178