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 struct powerpc_cpu **powerpc_pcpu; 50 51 int 52 pmc_save_kernel_callchain(uintptr_t *cc, int maxsamples, 53 struct trapframe *tf) 54 { 55 int frames = 0; 56 uintptr_t *sp; 57 58 cc[frames++] = tf->srr0; 59 sp = (uintptr_t *)tf->fixreg[1]; 60 61 for (frames = 1; frames < maxsamples; frames++) { 62 if (!INKERNEL(sp)) 63 break; 64 cc[frames++] = *(sp + 1); 65 sp = (uintptr_t *)*sp; 66 } 67 return (frames); 68 } 69 70 static int 71 powerpc_switch_in(struct pmc_cpu *pc, struct pmc_process *pp) 72 { 73 return (0); 74 } 75 76 static int 77 powerpc_switch_out(struct pmc_cpu *pc, struct pmc_process *pp) 78 { 79 return (0); 80 } 81 82 int 83 powerpc_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc) 84 { 85 int error; 86 struct pmc_hw *phw; 87 char powerpc_name[PMC_NAME_MAX]; 88 89 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 90 ("[powerpc,%d], illegal CPU %d", __LINE__, cpu)); 91 92 phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri]; 93 snprintf(powerpc_name, sizeof(powerpc_name), "POWERPC-%d", ri); 94 if ((error = copystr(powerpc_name, pi->pm_name, PMC_NAME_MAX, 95 NULL)) != 0) 96 return error; 97 pi->pm_class = PMC_CLASS_PPC7450; 98 if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) { 99 pi->pm_enabled = TRUE; 100 *ppmc = phw->phw_pmc; 101 } else { 102 pi->pm_enabled = FALSE; 103 *ppmc = NULL; 104 } 105 106 return (0); 107 } 108 109 int 110 powerpc_get_config(int cpu, int ri, struct pmc **ppm) 111 { 112 *ppm = powerpc_pcpu[cpu]->pc_ppcpmcs[ri].phw_pmc; 113 114 return (0); 115 } 116 117 struct pmc_mdep * 118 pmc_md_initialize() 119 { 120 struct pmc_mdep *pmc_mdep; 121 int error; 122 uint16_t vers; 123 124 /* 125 * Allocate space for pointers to PMC HW descriptors and for 126 * the MDEP structure used by MI code. 127 */ 128 powerpc_pcpu = malloc(sizeof(struct powerpc_cpu *) * pmc_cpu_max(), M_PMC, 129 M_WAITOK|M_ZERO); 130 131 /* Just one class */ 132 pmc_mdep = pmc_mdep_alloc(1); 133 134 pmc_mdep->pmd_cputype = PMC_CPU_PPC_7450; 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 case IBM970: 149 case IBM970FX: 150 case IBM970MP: 151 default: 152 error = -1; 153 break; 154 } 155 156 if (error != 0) { 157 pmc_mdep_free(pmc_mdep); 158 pmc_mdep = NULL; 159 return NULL; 160 } 161 162 return (pmc_mdep); 163 } 164 165 void 166 pmc_md_finalize(struct pmc_mdep *md) 167 { 168 free(md, M_PMC); 169 } 170 171 int 172 pmc_save_user_callchain(uintptr_t *cc, int maxsamples, 173 struct trapframe *tf) 174 { 175 (void) cc; 176 (void) maxsamples; 177 (void) tf; 178 return (0); 179 } 180