1 /*- 2 * Copyright (c) 2015 Andrew Turner 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/bus.h> 34 #include <sys/pcpu.h> 35 #include <sys/smp.h> 36 37 #include <vm/vm.h> 38 #include <vm/pmap.h> 39 40 #include <machine/intr.h> 41 #include <machine/smp.h> 42 43 #include <dev/ofw/openfirm.h> 44 #include <dev/ofw/ofw_cpu.h> 45 #include <dev/psci/psci.h> 46 47 static int running_cpus; 48 49 int 50 platform_mp_probe(void) 51 { 52 53 return (mp_ncpus > 1); 54 } 55 56 static boolean_t 57 virt_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 58 { 59 60 if (mp_maxid < id) 61 mp_maxid = id; 62 63 return (true); 64 } 65 66 void 67 platform_mp_setmaxid(void) 68 { 69 70 mp_maxid = PCPU_GET(cpuid); 71 mp_ncpus = ofw_cpu_early_foreach(virt_maxid, true); 72 if (mp_ncpus < 1) 73 mp_ncpus = 1; 74 mp_ncpus = MIN(mp_ncpus, MAXCPU); 75 } 76 77 static boolean_t 78 virt_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 79 { 80 int err; 81 82 if (running_cpus >= mp_ncpus) 83 return (false); 84 running_cpus++; 85 86 err = psci_cpu_on(*reg, pmap_kextract((vm_offset_t)mpentry), id); 87 88 if (err != PSCI_RETVAL_SUCCESS) 89 return (false); 90 91 return (true); 92 } 93 94 void 95 platform_mp_start_ap(void) 96 { 97 98 ofw_cpu_early_foreach(virt_start_ap, true); 99 } 100 101 void 102 platform_mp_init_secondary(void) 103 { 104 105 intr_pic_init_secondary(); 106 } 107 108 void 109 platform_ipi_send(cpuset_t cpus, u_int ipi) 110 { 111 112 pic_ipi_send(cpus, ipi); 113 } 114