1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org> 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 #include "opt_platform.h" 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/reboot.h> 37 #include <sys/devmap.h> 38 #include <sys/smp.h> 39 40 #include <vm/vm.h> 41 42 #include <machine/cpu.h> 43 #include <machine/bus.h> 44 #include <machine/intr.h> 45 #include <machine/machdep.h> 46 #include <machine/platformvar.h> 47 #include <machine/smp.h> 48 49 #include <dev/fdt/fdt_common.h> 50 #include <dev/ofw/openfirm.h> 51 #include <dev/ofw/ofw_cpu.h> 52 53 #include <arm/qualcomm/ipq4018_machdep.h> 54 #include <arm/qualcomm/qcom_scm_legacy.h> 55 #include <arm/qualcomm/qcom_cpu_kpssv2.h> 56 57 #include "platform_if.h" 58 59 void 60 ipq4018_mp_setmaxid(platform_t plat) 61 { 62 int ncpu; 63 64 /* If we've already set the global vars don't bother to do it again. */ 65 if (mp_ncpus != 0) 66 return; 67 68 /* Read current CP15 Cache Size ID Register */ 69 ncpu = cp15_l2ctlr_get(); 70 ncpu = CPUV7_L2CTLR_NPROC(ncpu); 71 72 mp_ncpus = ncpu; 73 mp_maxid = ncpu - 1; 74 75 printf("SMP: ncpu=%d\n", ncpu); 76 } 77 78 static bool 79 ipq4018_start_ap(u_int id, phandle_t node, u_int addr_cells, pcell_t *arg) 80 { 81 82 /* 83 * For the IPQ401x we assume the enable method is 84 * "qcom,kpss-acc-v2". If this path gets turned into 85 * something more generic for other 32 bit qualcomm 86 * SoCs then we'll likely want to turn this into a 87 * switch based on "enable-method". 88 */ 89 return qcom_cpu_kpssv2_regulator_start(id, node); 90 } 91 92 void 93 ipq4018_mp_start_ap(platform_t plat) 94 { 95 int ret; 96 97 /* 98 * First step - SCM call to set the cold boot address to mpentry, so 99 * CPUs hopefully start in the MP path. 100 */ 101 ret = qcom_scm_legacy_mp_set_cold_boot_address((vm_offset_t) mpentry); 102 if (ret != 0) 103 panic("%s: Couldn't set cold boot address via SCM " 104 "(error 0x%08x)", __func__, ret); 105 106 /* 107 * Next step - loop over the CPU nodes and do the per-CPU setup 108 * required to power on the CPUs themselves. 109 */ 110 ofw_cpu_early_foreach(ipq4018_start_ap, true); 111 112 /* 113 * The next set of IPIs to the CPUs will wake them up and enter 114 * mpentry. 115 */ 116 } 117