cpu_fdt.c revision 1.3.2.2
1 1.3.2.2 jdolecek /* $NetBSD: cpu_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 <sys/cdefs.h> 30 1.3.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: cpu_fdt.c,v 1.3.2.2 2017/12/03 11:35:52 jdolecek Exp $"); 31 1.3.2.2 jdolecek 32 1.3.2.2 jdolecek #include <sys/param.h> 33 1.3.2.2 jdolecek #include <sys/bus.h> 34 1.3.2.2 jdolecek #include <sys/device.h> 35 1.3.2.2 jdolecek #include <sys/systm.h> 36 1.3.2.2 jdolecek #include <sys/kernel.h> 37 1.3.2.2 jdolecek 38 1.3.2.2 jdolecek #include <dev/fdt/fdtvar.h> 39 1.3.2.2 jdolecek 40 1.3.2.2 jdolecek #include <arm/cpu.h> 41 1.3.2.2 jdolecek 42 1.3.2.2 jdolecek static int cpu_fdt_match(device_t, cfdata_t, void *); 43 1.3.2.2 jdolecek static void cpu_fdt_attach(device_t, device_t, void *); 44 1.3.2.2 jdolecek 45 1.3.2.2 jdolecek enum cpu_fdt_type { 46 1.3.2.2 jdolecek ARM_CPU_UP = 1, 47 1.3.2.2 jdolecek ARM_CPU_ARMV7, 48 1.3.2.2 jdolecek ARM_CPU_ARMV8, 49 1.3.2.2 jdolecek }; 50 1.3.2.2 jdolecek 51 1.3.2.2 jdolecek struct cpu_fdt_softc { 52 1.3.2.2 jdolecek device_t sc_dev; 53 1.3.2.2 jdolecek int sc_phandle; 54 1.3.2.2 jdolecek }; 55 1.3.2.2 jdolecek 56 1.3.2.2 jdolecek static const struct of_compat_data compat_data[] = { 57 1.3.2.2 jdolecek { "arm,arm1176jzf-s", ARM_CPU_UP }, 58 1.3.2.2 jdolecek 59 1.3.2.2 jdolecek { "arm,cortex-a5", ARM_CPU_ARMV7 }, 60 1.3.2.2 jdolecek { "arm,cortex-a7", ARM_CPU_ARMV7 }, 61 1.3.2.2 jdolecek { "arm,cortex-a8", ARM_CPU_ARMV7 }, 62 1.3.2.2 jdolecek { "arm,cortex-a9", ARM_CPU_ARMV7 }, 63 1.3.2.2 jdolecek { "arm,cortex-a12", ARM_CPU_ARMV7 }, 64 1.3.2.2 jdolecek { "arm,cortex-a15", ARM_CPU_ARMV7 }, 65 1.3.2.2 jdolecek { "arm,cortex-a17", ARM_CPU_ARMV7 }, 66 1.3.2.2 jdolecek 67 1.3.2.2 jdolecek { "arm,cortex-a53", ARM_CPU_ARMV8 }, 68 1.3.2.2 jdolecek { "arm,cortex-a57", ARM_CPU_ARMV8 }, 69 1.3.2.2 jdolecek { "arm,cortex-a72", ARM_CPU_ARMV8 }, 70 1.3.2.2 jdolecek { "arm,cortex-a73", ARM_CPU_ARMV8 }, 71 1.3.2.2 jdolecek { NULL } 72 1.3.2.2 jdolecek }; 73 1.3.2.2 jdolecek 74 1.3.2.2 jdolecek CFATTACH_DECL_NEW(cpu_fdt, sizeof(struct cpu_fdt_softc), 75 1.3.2.2 jdolecek cpu_fdt_match, cpu_fdt_attach, NULL, NULL); 76 1.3.2.2 jdolecek 77 1.3.2.2 jdolecek static int 78 1.3.2.2 jdolecek cpu_fdt_match(device_t parent, cfdata_t cf, void *aux) 79 1.3.2.2 jdolecek { 80 1.3.2.2 jdolecek struct fdt_attach_args * const faa = aux; 81 1.3.2.2 jdolecek const int phandle = faa->faa_phandle; 82 1.3.2.2 jdolecek enum cpu_fdt_type type; 83 1.3.2.2 jdolecek int is_compatible; 84 1.3.2.2 jdolecek bus_addr_t mpidr; 85 1.3.2.2 jdolecek 86 1.3.2.2 jdolecek is_compatible = of_match_compat_data(phandle, compat_data); 87 1.3.2.2 jdolecek if (!is_compatible) 88 1.3.2.2 jdolecek return 0; 89 1.3.2.2 jdolecek 90 1.3.2.2 jdolecek type = of_search_compatible(phandle, compat_data)->data; 91 1.3.2.2 jdolecek switch (type) { 92 1.3.2.2 jdolecek case ARM_CPU_ARMV7: 93 1.3.2.2 jdolecek case ARM_CPU_ARMV8: 94 1.3.2.2 jdolecek /* XXX NetBSD requires all CPUs to be in the same cluster */ 95 1.3.2.2 jdolecek if (fdtbus_get_reg(phandle, 0, &mpidr, NULL) != 0) 96 1.3.2.2 jdolecek return 0; 97 1.3.2.2 jdolecek const uint32_t bp_mpidr = armreg_mpidr_read(); 98 1.3.2.2 jdolecek const u_int bp_clid = __SHIFTOUT(bp_mpidr, CORTEXA9_MPIDR_CLID); 99 1.3.2.2 jdolecek const u_int clid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CLID); 100 1.3.2.2 jdolecek if (bp_clid != clid) 101 1.3.2.2 jdolecek return 0; 102 1.3.2.2 jdolecek break; 103 1.3.2.2 jdolecek default: 104 1.3.2.2 jdolecek break; 105 1.3.2.2 jdolecek } 106 1.3.2.2 jdolecek 107 1.3.2.2 jdolecek return is_compatible; 108 1.3.2.2 jdolecek } 109 1.3.2.2 jdolecek 110 1.3.2.2 jdolecek static void 111 1.3.2.2 jdolecek cpu_fdt_attach(device_t parent, device_t self, void *aux) 112 1.3.2.2 jdolecek { 113 1.3.2.2 jdolecek struct cpu_fdt_softc * const sc = device_private(self); 114 1.3.2.2 jdolecek struct fdt_attach_args * const faa = aux; 115 1.3.2.2 jdolecek const int phandle = faa->faa_phandle; 116 1.3.2.2 jdolecek enum cpu_fdt_type type; 117 1.3.2.2 jdolecek bus_addr_t mpidr; 118 1.3.2.2 jdolecek cpuid_t cpuid; 119 1.3.2.2 jdolecek 120 1.3.2.2 jdolecek sc->sc_dev = self; 121 1.3.2.2 jdolecek sc->sc_phandle = phandle; 122 1.3.2.2 jdolecek 123 1.3.2.2 jdolecek type = of_search_compatible(phandle, compat_data)->data; 124 1.3.2.2 jdolecek 125 1.3.2.2 jdolecek switch (type) { 126 1.3.2.2 jdolecek case ARM_CPU_ARMV7: 127 1.3.2.2 jdolecek case ARM_CPU_ARMV8: 128 1.3.2.2 jdolecek if (fdtbus_get_reg(phandle, 0, &mpidr, NULL) != 0) { 129 1.3.2.2 jdolecek aprint_error(": missing 'reg' property\n"); 130 1.3.2.2 jdolecek return; 131 1.3.2.2 jdolecek } 132 1.3.2.2 jdolecek cpuid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CPUID); 133 1.3.2.2 jdolecek break; 134 1.3.2.2 jdolecek default: 135 1.3.2.2 jdolecek cpuid = 0; 136 1.3.2.2 jdolecek break; 137 1.3.2.2 jdolecek } 138 1.3.2.2 jdolecek 139 1.3.2.2 jdolecek /* Attach the CPU */ 140 1.3.2.2 jdolecek cpu_attach(self, cpuid); 141 1.3.2.2 jdolecek } 142
Indexes created Wed Oct 01 19:09:53 GMT 2025