psci_fdt.c revision 1.2.2.2
1 1.2.2.2 skrll /* $NetBSD: psci_fdt.c,v 1.2.2.2 2017/08/28 17:51:30 skrll Exp $ */ 2 1.2.2.2 skrll 3 1.2.2.2 skrll /*- 4 1.2.2.2 skrll * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.2.2.2 skrll * All rights reserved. 6 1.2.2.2 skrll * 7 1.2.2.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 skrll * modification, are permitted provided that the following conditions 9 1.2.2.2 skrll * are met: 10 1.2.2.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 skrll * documentation and/or other materials provided with the distribution. 15 1.2.2.2 skrll * 16 1.2.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.2.2 skrll * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.2.2 skrll * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.2.2 skrll * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.2.2 skrll * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.2.2 skrll * SUCH DAMAGE. 27 1.2.2.2 skrll */ 28 1.2.2.2 skrll 29 1.2.2.2 skrll #include "opt_multiprocessor.h" 30 1.2.2.2 skrll 31 1.2.2.2 skrll #include <sys/cdefs.h> 32 1.2.2.2 skrll __KERNEL_RCSID(0, "$NetBSD: psci_fdt.c,v 1.2.2.2 2017/08/28 17:51:30 skrll Exp $"); 33 1.2.2.2 skrll 34 1.2.2.2 skrll #include <sys/param.h> 35 1.2.2.2 skrll #include <sys/bus.h> 36 1.2.2.2 skrll #include <sys/device.h> 37 1.2.2.2 skrll #include <sys/systm.h> 38 1.2.2.2 skrll #include <sys/kernel.h> 39 1.2.2.2 skrll 40 1.2.2.2 skrll #include <dev/fdt/fdtvar.h> 41 1.2.2.2 skrll 42 1.2.2.2 skrll #include <arm/locore.h> 43 1.2.2.2 skrll #include <arm/armreg.h> 44 1.2.2.2 skrll 45 1.2.2.2 skrll #include <arm/arm/psci.h> 46 1.2.2.2 skrll #include <arm/fdt/psci_fdt.h> 47 1.2.2.2 skrll 48 1.2.2.2 skrll static int psci_fdt_match(device_t, cfdata_t, void *); 49 1.2.2.2 skrll static void psci_fdt_attach(device_t, device_t, void *); 50 1.2.2.2 skrll 51 1.2.2.2 skrll static int psci_fdt_init(const int); 52 1.2.2.2 skrll 53 1.2.2.2 skrll static const char * const compatible[] = { 54 1.2.2.2 skrll "arm,psci", 55 1.2.2.2 skrll "arm,psci-0.2", 56 1.2.2.2 skrll "arm,psci-1.0", 57 1.2.2.2 skrll NULL 58 1.2.2.2 skrll }; 59 1.2.2.2 skrll 60 1.2.2.2 skrll CFATTACH_DECL_NEW(psci_fdt, 0, psci_fdt_match, psci_fdt_attach, NULL, NULL); 61 1.2.2.2 skrll 62 1.2.2.2 skrll static int 63 1.2.2.2 skrll psci_fdt_match(device_t parent, cfdata_t cf, void *aux) 64 1.2.2.2 skrll { 65 1.2.2.2 skrll struct fdt_attach_args * const faa = aux; 66 1.2.2.2 skrll 67 1.2.2.2 skrll return of_match_compatible(faa->faa_phandle, compatible); 68 1.2.2.2 skrll } 69 1.2.2.2 skrll 70 1.2.2.2 skrll static void 71 1.2.2.2 skrll psci_fdt_attach(device_t parent, device_t self, void *aux) 72 1.2.2.2 skrll { 73 1.2.2.2 skrll struct fdt_attach_args * const faa = aux; 74 1.2.2.2 skrll const int phandle = faa->faa_phandle; 75 1.2.2.2 skrll 76 1.2.2.2 skrll psci_fdt_init(phandle); 77 1.2.2.2 skrll 78 1.2.2.2 skrll const uint32_t ver = psci_version(); 79 1.2.2.2 skrll const u_int ver_maj = __SHIFTOUT(ver, PSCI_VERSION_MAJOR); 80 1.2.2.2 skrll const u_int ver_min = __SHIFTOUT(ver, PSCI_VERSION_MINOR); 81 1.2.2.2 skrll 82 1.2.2.2 skrll aprint_naive("\n"); 83 1.2.2.2 skrll aprint_normal(": PSCI %u.%u\n", ver_maj, ver_min); 84 1.2.2.2 skrll } 85 1.2.2.2 skrll 86 1.2.2.2 skrll static int 87 1.2.2.2 skrll psci_fdt_init(const int phandle) 88 1.2.2.2 skrll { 89 1.2.2.2 skrll char method[4]; 90 1.2.2.2 skrll uint32_t val; 91 1.2.2.2 skrll 92 1.2.2.2 skrll if (!of_hasprop(phandle, "method")) { 93 1.2.2.2 skrll aprint_error("PSCI: missing 'method' property\n"); 94 1.2.2.2 skrll return EINVAL; 95 1.2.2.2 skrll } 96 1.2.2.2 skrll 97 1.2.2.2 skrll OF_getprop(phandle, "method", method, sizeof(method)); 98 1.2.2.2 skrll if (strcmp(method, "smc") == 0) 99 1.2.2.2 skrll psci_init(psci_call_smc); 100 1.2.2.2 skrll else if (strcmp(method, "hvc") == 0) 101 1.2.2.2 skrll psci_init(psci_call_hvc); 102 1.2.2.2 skrll else { 103 1.2.2.2 skrll aprint_error("PSCI: unsupported method '%s'\n", method); 104 1.2.2.2 skrll return EINVAL; 105 1.2.2.2 skrll } 106 1.2.2.2 skrll 107 1.2.2.2 skrll const char * const compat_0_1[] = { "arm,psci", NULL }; 108 1.2.2.2 skrll if (of_match_compatible(phandle, compat_0_1)) { 109 1.2.2.2 skrll psci_clearfunc(); 110 1.2.2.2 skrll if (of_getprop_uint32(phandle, "cpu_on", &val) == 0) 111 1.2.2.2 skrll psci_setfunc(PSCI_FUNC_CPU_ON, val); 112 1.2.2.2 skrll } 113 1.2.2.2 skrll 114 1.2.2.2 skrll return 0; 115 1.2.2.2 skrll } 116 1.2.2.2 skrll 117 1.2.2.2 skrll void 118 1.2.2.2 skrll psci_fdt_bootstrap(void) 119 1.2.2.2 skrll { 120 1.2.2.2 skrll #ifdef MULTIPROCESSOR 121 1.2.2.2 skrll extern void cortex_mpstart(void); 122 1.2.2.2 skrll bus_addr_t mpidr; 123 1.2.2.2 skrll uint32_t bp_mpidr; 124 1.2.2.2 skrll int child; 125 1.2.2.2 skrll 126 1.2.2.2 skrll const int cpus = OF_finddevice("/cpus"); 127 1.2.2.2 skrll if (cpus == -1) { 128 1.2.2.2 skrll aprint_error("PSCI: no /cpus node found\n"); 129 1.2.2.2 skrll arm_cpu_max = 1; 130 1.2.2.2 skrll return; 131 1.2.2.2 skrll } 132 1.2.2.2 skrll 133 1.2.2.2 skrll /* Count CPUs */ 134 1.2.2.2 skrll arm_cpu_max = 0; 135 1.2.2.2 skrll for (child = OF_child(cpus); child; child = OF_peer(child)) 136 1.2.2.2 skrll if (fdtbus_status_okay(child)) 137 1.2.2.2 skrll arm_cpu_max++; 138 1.2.2.2 skrll 139 1.2.2.2 skrll const int phandle = OF_finddevice("/psci"); 140 1.2.2.2 skrll if (phandle == -1) { 141 1.2.2.2 skrll aprint_error("PSCI: no /psci node found\n"); 142 1.2.2.2 skrll return; 143 1.2.2.2 skrll } 144 1.2.2.2 skrll 145 1.2.2.2 skrll if (psci_fdt_init(phandle) != 0) 146 1.2.2.2 skrll return; 147 1.2.2.2 skrll 148 1.2.2.2 skrll /* MPIDR affinity levels of boot processor. */ 149 1.2.2.2 skrll bp_mpidr = armreg_mpidr_read() & (MPIDR_AFF2|MPIDR_AFF1|MPIDR_AFF0); 150 1.2.2.2 skrll 151 1.2.2.2 skrll /* Boot APs */ 152 1.2.2.2 skrll uint32_t started = 0; 153 1.2.2.2 skrll for (child = OF_child(cpus); child; child = OF_peer(child)) { 154 1.2.2.2 skrll if (!fdtbus_status_okay(child)) 155 1.2.2.2 skrll continue; 156 1.2.2.2 skrll if (fdtbus_get_reg(child, 0, &mpidr, NULL) != 0) 157 1.2.2.2 skrll continue; 158 1.2.2.2 skrll if (mpidr == bp_mpidr) 159 1.2.2.2 skrll continue; /* BP already started */ 160 1.2.2.2 skrll 161 1.2.2.2 skrll /* XXX NetBSD requires all CPUs to be in the same cluster */ 162 1.2.2.2 skrll const u_int bp_clid = __SHIFTOUT(bp_mpidr, CORTEXA9_MPIDR_CLID); 163 1.2.2.2 skrll const u_int clid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CLID); 164 1.2.2.2 skrll if (bp_clid != clid) 165 1.2.2.2 skrll continue; 166 1.2.2.2 skrll 167 1.2.2.2 skrll const u_int cpuid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CPUID); 168 1.2.2.2 skrll int ret = psci_cpu_on(cpuid, (register_t)cortex_mpstart, 0); 169 1.2.2.2 skrll if (ret == PSCI_SUCCESS) 170 1.2.2.2 skrll started |= __BIT(cpuid); 171 1.2.2.2 skrll } 172 1.2.2.2 skrll 173 1.2.2.2 skrll /* Wait for APs to start */ 174 1.2.2.2 skrll for (u_int i = 0x10000000; i > 0; i--) { 175 1.2.2.2 skrll arm_dmb(); 176 1.2.2.2 skrll if (arm_cpu_hatched == started) 177 1.2.2.2 skrll break; 178 1.2.2.2 skrll } 179 1.2.2.2 skrll #endif 180 1.2.2.2 skrll } 181
Indexes created Tue Sep 30 07:10:03 GMT 2025