psci_fdt.c revision 1.3.2.2
1 1.3.2.2 jdolecek /* $NetBSD: psci_fdt.c,v 1.3.2.2 2017/12/03 11:35:52 jdolecek Exp $ */ 2 1.3.2.2 jdolecek 3 1.3.2.2 jdolecek /*- 4 1.3.2.2 jdolecek * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.3.2.2 jdolecek * All rights reserved. 6 1.3.2.2 jdolecek * 7 1.3.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.3.2.2 jdolecek * modification, are permitted provided that the following conditions 9 1.3.2.2 jdolecek * are met: 10 1.3.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.3.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.3.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.3.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.3.2.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.3.2.2 jdolecek * 16 1.3.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.3.2.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.3.2.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.3.2.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.3.2.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.3.2.2 jdolecek * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.3.2.2 jdolecek * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.3.2.2 jdolecek * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.3.2.2 jdolecek * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.3.2.2 jdolecek * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.3.2.2 jdolecek * SUCH DAMAGE. 27 1.3.2.2 jdolecek */ 28 1.3.2.2 jdolecek 29 1.3.2.2 jdolecek #include "opt_multiprocessor.h" 30 1.3.2.2 jdolecek 31 1.3.2.2 jdolecek #include <sys/cdefs.h> 32 1.3.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: psci_fdt.c,v 1.3.2.2 2017/12/03 11:35:52 jdolecek Exp $"); 33 1.3.2.2 jdolecek 34 1.3.2.2 jdolecek #include <sys/param.h> 35 1.3.2.2 jdolecek #include <sys/bus.h> 36 1.3.2.2 jdolecek #include <sys/device.h> 37 1.3.2.2 jdolecek #include <sys/systm.h> 38 1.3.2.2 jdolecek #include <sys/kernel.h> 39 1.3.2.2 jdolecek 40 1.3.2.2 jdolecek #include <dev/fdt/fdtvar.h> 41 1.3.2.2 jdolecek 42 1.3.2.2 jdolecek #include <arm/locore.h> 43 1.3.2.2 jdolecek #include <arm/armreg.h> 44 1.3.2.2 jdolecek 45 1.3.2.2 jdolecek #include <arm/arm/psci.h> 46 1.3.2.2 jdolecek #include <arm/fdt/psci_fdt.h> 47 1.3.2.2 jdolecek 48 1.3.2.2 jdolecek static int psci_fdt_match(device_t, cfdata_t, void *); 49 1.3.2.2 jdolecek static void psci_fdt_attach(device_t, device_t, void *); 50 1.3.2.2 jdolecek 51 1.3.2.2 jdolecek static int psci_fdt_init(const int); 52 1.3.2.2 jdolecek 53 1.3.2.2 jdolecek static const char * const compatible[] = { 54 1.3.2.2 jdolecek "arm,psci", 55 1.3.2.2 jdolecek "arm,psci-0.2", 56 1.3.2.2 jdolecek "arm,psci-1.0", 57 1.3.2.2 jdolecek NULL 58 1.3.2.2 jdolecek }; 59 1.3.2.2 jdolecek 60 1.3.2.2 jdolecek CFATTACH_DECL_NEW(psci_fdt, 0, psci_fdt_match, psci_fdt_attach, NULL, NULL); 61 1.3.2.2 jdolecek 62 1.3.2.2 jdolecek static void 63 1.3.2.2 jdolecek psci_fdt_reset(device_t dev) 64 1.3.2.2 jdolecek { 65 1.3.2.2 jdolecek delay(500000); 66 1.3.2.2 jdolecek psci_system_reset(); 67 1.3.2.2 jdolecek } 68 1.3.2.2 jdolecek 69 1.3.2.2 jdolecek static void 70 1.3.2.2 jdolecek psci_fdt_poweroff(device_t dev) 71 1.3.2.2 jdolecek { 72 1.3.2.2 jdolecek delay(500000); 73 1.3.2.2 jdolecek psci_system_off(); 74 1.3.2.2 jdolecek } 75 1.3.2.2 jdolecek 76 1.3.2.2 jdolecek static const struct fdtbus_power_controller_func psci_power_funcs = { 77 1.3.2.2 jdolecek .reset = psci_fdt_reset, 78 1.3.2.2 jdolecek .poweroff = psci_fdt_poweroff, 79 1.3.2.2 jdolecek }; 80 1.3.2.2 jdolecek 81 1.3.2.2 jdolecek static int 82 1.3.2.2 jdolecek psci_fdt_match(device_t parent, cfdata_t cf, void *aux) 83 1.3.2.2 jdolecek { 84 1.3.2.2 jdolecek struct fdt_attach_args * const faa = aux; 85 1.3.2.2 jdolecek 86 1.3.2.2 jdolecek return of_match_compatible(faa->faa_phandle, compatible); 87 1.3.2.2 jdolecek } 88 1.3.2.2 jdolecek 89 1.3.2.2 jdolecek static void 90 1.3.2.2 jdolecek psci_fdt_attach(device_t parent, device_t self, void *aux) 91 1.3.2.2 jdolecek { 92 1.3.2.2 jdolecek struct fdt_attach_args * const faa = aux; 93 1.3.2.2 jdolecek const int phandle = faa->faa_phandle; 94 1.3.2.2 jdolecek 95 1.3.2.2 jdolecek psci_fdt_init(phandle); 96 1.3.2.2 jdolecek 97 1.3.2.2 jdolecek const uint32_t ver = psci_version(); 98 1.3.2.2 jdolecek const u_int ver_maj = __SHIFTOUT(ver, PSCI_VERSION_MAJOR); 99 1.3.2.2 jdolecek const u_int ver_min = __SHIFTOUT(ver, PSCI_VERSION_MINOR); 100 1.3.2.2 jdolecek 101 1.3.2.2 jdolecek aprint_naive("\n"); 102 1.3.2.2 jdolecek aprint_normal(": PSCI %u.%u\n", ver_maj, ver_min); 103 1.3.2.2 jdolecek 104 1.3.2.2 jdolecek fdtbus_register_power_controller(self, phandle, 105 1.3.2.2 jdolecek &psci_power_funcs); 106 1.3.2.2 jdolecek } 107 1.3.2.2 jdolecek 108 1.3.2.2 jdolecek static int 109 1.3.2.2 jdolecek psci_fdt_init(const int phandle) 110 1.3.2.2 jdolecek { 111 1.3.2.2 jdolecek char method[4]; 112 1.3.2.2 jdolecek uint32_t val; 113 1.3.2.2 jdolecek 114 1.3.2.2 jdolecek if (!of_hasprop(phandle, "method")) { 115 1.3.2.2 jdolecek aprint_error("PSCI: missing 'method' property\n"); 116 1.3.2.2 jdolecek return EINVAL; 117 1.3.2.2 jdolecek } 118 1.3.2.2 jdolecek 119 1.3.2.2 jdolecek OF_getprop(phandle, "method", method, sizeof(method)); 120 1.3.2.2 jdolecek if (strcmp(method, "smc") == 0) 121 1.3.2.2 jdolecek psci_init(psci_call_smc); 122 1.3.2.2 jdolecek else if (strcmp(method, "hvc") == 0) 123 1.3.2.2 jdolecek psci_init(psci_call_hvc); 124 1.3.2.2 jdolecek else { 125 1.3.2.2 jdolecek aprint_error("PSCI: unsupported method '%s'\n", method); 126 1.3.2.2 jdolecek return EINVAL; 127 1.3.2.2 jdolecek } 128 1.3.2.2 jdolecek 129 1.3.2.2 jdolecek const char * const compat_0_1[] = { "arm,psci", NULL }; 130 1.3.2.2 jdolecek if (of_match_compatible(phandle, compat_0_1)) { 131 1.3.2.2 jdolecek psci_clearfunc(); 132 1.3.2.2 jdolecek if (of_getprop_uint32(phandle, "cpu_on", &val) == 0) 133 1.3.2.2 jdolecek psci_setfunc(PSCI_FUNC_CPU_ON, val); 134 1.3.2.2 jdolecek } 135 1.3.2.2 jdolecek 136 1.3.2.2 jdolecek return 0; 137 1.3.2.2 jdolecek } 138 1.3.2.2 jdolecek 139 1.3.2.2 jdolecek void 140 1.3.2.2 jdolecek psci_fdt_bootstrap(void) 141 1.3.2.2 jdolecek { 142 1.3.2.2 jdolecek #ifdef MULTIPROCESSOR 143 1.3.2.2 jdolecek extern void cortex_mpstart(void); 144 1.3.2.2 jdolecek bus_addr_t mpidr; 145 1.3.2.2 jdolecek uint32_t bp_mpidr; 146 1.3.2.2 jdolecek int child; 147 1.3.2.2 jdolecek 148 1.3.2.2 jdolecek const int cpus = OF_finddevice("/cpus"); 149 1.3.2.2 jdolecek if (cpus == -1) { 150 1.3.2.2 jdolecek aprint_error("PSCI: no /cpus node found\n"); 151 1.3.2.2 jdolecek arm_cpu_max = 1; 152 1.3.2.2 jdolecek return; 153 1.3.2.2 jdolecek } 154 1.3.2.2 jdolecek 155 1.3.2.2 jdolecek /* Count CPUs */ 156 1.3.2.2 jdolecek arm_cpu_max = 0; 157 1.3.2.2 jdolecek for (child = OF_child(cpus); child; child = OF_peer(child)) 158 1.3.2.2 jdolecek if (fdtbus_status_okay(child)) 159 1.3.2.2 jdolecek arm_cpu_max++; 160 1.3.2.2 jdolecek 161 1.3.2.2 jdolecek const int phandle = OF_finddevice("/psci"); 162 1.3.2.2 jdolecek if (phandle == -1) { 163 1.3.2.2 jdolecek aprint_error("PSCI: no /psci node found\n"); 164 1.3.2.2 jdolecek return; 165 1.3.2.2 jdolecek } 166 1.3.2.2 jdolecek 167 1.3.2.2 jdolecek if (psci_fdt_init(phandle) != 0) 168 1.3.2.2 jdolecek return; 169 1.3.2.2 jdolecek 170 1.3.2.2 jdolecek /* MPIDR affinity levels of boot processor. */ 171 1.3.2.2 jdolecek bp_mpidr = armreg_mpidr_read() & (MPIDR_AFF2|MPIDR_AFF1|MPIDR_AFF0); 172 1.3.2.2 jdolecek 173 1.3.2.2 jdolecek /* Boot APs */ 174 1.3.2.2 jdolecek uint32_t started = 0; 175 1.3.2.2 jdolecek for (child = OF_child(cpus); child; child = OF_peer(child)) { 176 1.3.2.2 jdolecek if (!fdtbus_status_okay(child)) 177 1.3.2.2 jdolecek continue; 178 1.3.2.2 jdolecek if (fdtbus_get_reg(child, 0, &mpidr, NULL) != 0) 179 1.3.2.2 jdolecek continue; 180 1.3.2.2 jdolecek if (mpidr == bp_mpidr) 181 1.3.2.2 jdolecek continue; /* BP already started */ 182 1.3.2.2 jdolecek 183 1.3.2.2 jdolecek /* XXX NetBSD requires all CPUs to be in the same cluster */ 184 1.3.2.2 jdolecek const u_int bp_clid = __SHIFTOUT(bp_mpidr, CORTEXA9_MPIDR_CLID); 185 1.3.2.2 jdolecek const u_int clid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CLID); 186 1.3.2.2 jdolecek if (bp_clid != clid) 187 1.3.2.2 jdolecek continue; 188 1.3.2.2 jdolecek 189 1.3.2.2 jdolecek const u_int cpuid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CPUID); 190 1.3.2.2 jdolecek int ret = psci_cpu_on(cpuid, (register_t)cortex_mpstart, 0); 191 1.3.2.2 jdolecek if (ret == PSCI_SUCCESS) 192 1.3.2.2 jdolecek started |= __BIT(cpuid); 193 1.3.2.2 jdolecek } 194 1.3.2.2 jdolecek 195 1.3.2.2 jdolecek /* Wait for APs to start */ 196 1.3.2.2 jdolecek for (u_int i = 0x10000000; i > 0; i--) { 197 1.3.2.2 jdolecek arm_dmb(); 198 1.3.2.2 jdolecek if (arm_cpu_hatched == started) 199 1.3.2.2 jdolecek break; 200 1.3.2.2 jdolecek } 201 1.3.2.2 jdolecek #endif 202 1.3.2.2 jdolecek } 203
Indexes created Tue Sep 30 07:10:03 GMT 2025