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 int ncpus; 53 54 ncpus = ofw_cpu_early_foreach(NULL, true); 55 if (ncpus <= 1) { 56 mp_ncpus = 1; 57 return (0); 58 } 59 60 mp_ncpus = MIN(ncpus, MAXCPU); 61 62 return (1); 63 } 64 65 static boolean_t 66 virt_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 67 { 68 69 if (mp_maxid < id) 70 mp_maxid = id; 71 72 return (true); 73 } 74 75 void 76 platform_mp_setmaxid(void) 77 { 78 79 mp_maxid = PCPU_GET(cpuid); 80 ofw_cpu_early_foreach(virt_maxid, true); 81 } 82 83 static boolean_t 84 virt_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 85 { 86 int err; 87 88 if (running_cpus >= mp_ncpus) 89 return (false); 90 running_cpus++; 91 92 err = psci_cpu_on(*reg, pmap_kextract((vm_offset_t)mpentry), id); 93 94 if (err != PSCI_RETVAL_SUCCESS) 95 return (false); 96 97 return (true); 98 } 99 100 void 101 platform_mp_start_ap(void) 102 { 103 104 ofw_cpu_early_foreach(virt_start_ap, true); 105 } 106 107 void 108 platform_mp_init_secondary(void) 109 { 110 111 arm_init_secondary_ic(); 112 } 113 114 void 115 platform_ipi_send(cpuset_t cpus, u_int ipi) 116 { 117 118 pic_ipi_send(cpus, ipi); 119 } 120