cpu_fdt.c revision 1.2.4.2
1 1.2.4.2 skrll /* $NetBSD: cpu_fdt.c,v 1.2.4.2 2017/08/28 17:51:30 skrll Exp $ */ 2 1.2.4.2 skrll 3 1.2.4.2 skrll /*- 4 1.2.4.2 skrll * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.2.4.2 skrll * All rights reserved. 6 1.2.4.2 skrll * 7 1.2.4.2 skrll * Redistribution and use in source and binary forms, with or without 8 1.2.4.2 skrll * modification, are permitted provided that the following conditions 9 1.2.4.2 skrll * are met: 10 1.2.4.2 skrll * 1. Redistributions of source code must retain the above copyright 11 1.2.4.2 skrll * notice, this list of conditions and the following disclaimer. 12 1.2.4.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.4.2 skrll * notice, this list of conditions and the following disclaimer in the 14 1.2.4.2 skrll * documentation and/or other materials provided with the distribution. 15 1.2.4.2 skrll * 16 1.2.4.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.2.4.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.2.4.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.2.4.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 1.2.4.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 1.2.4.2 skrll * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 1.2.4.2 skrll * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 1.2.4.2 skrll * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 1.2.4.2 skrll * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 1.2.4.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 1.2.4.2 skrll * SUCH DAMAGE. 27 1.2.4.2 skrll */ 28 1.2.4.2 skrll 29 1.2.4.2 skrll #include <sys/cdefs.h> 30 1.2.4.2 skrll __KERNEL_RCSID(0, "$NetBSD: cpu_fdt.c,v 1.2.4.2 2017/08/28 17:51:30 skrll Exp $"); 31 1.2.4.2 skrll 32 1.2.4.2 skrll #include <sys/param.h> 33 1.2.4.2 skrll #include <sys/bus.h> 34 1.2.4.2 skrll #include <sys/device.h> 35 1.2.4.2 skrll #include <sys/systm.h> 36 1.2.4.2 skrll #include <sys/kernel.h> 37 1.2.4.2 skrll 38 1.2.4.2 skrll #include <dev/fdt/fdtvar.h> 39 1.2.4.2 skrll 40 1.2.4.2 skrll #include <arm/cpu.h> 41 1.2.4.2 skrll 42 1.2.4.2 skrll static int cpu_fdt_match(device_t, cfdata_t, void *); 43 1.2.4.2 skrll static void cpu_fdt_attach(device_t, device_t, void *); 44 1.2.4.2 skrll 45 1.2.4.2 skrll struct cpu_fdt_softc { 46 1.2.4.2 skrll device_t sc_dev; 47 1.2.4.2 skrll int sc_phandle; 48 1.2.4.2 skrll }; 49 1.2.4.2 skrll 50 1.2.4.2 skrll CFATTACH_DECL_NEW(cpu_fdt, sizeof(struct cpu_fdt_softc), 51 1.2.4.2 skrll cpu_fdt_match, cpu_fdt_attach, NULL, NULL); 52 1.2.4.2 skrll 53 1.2.4.2 skrll static int 54 1.2.4.2 skrll cpu_fdt_match(device_t parent, cfdata_t cf, void *aux) 55 1.2.4.2 skrll { 56 1.2.4.2 skrll const char * const compatible[] = { 57 1.2.4.2 skrll "arm,cortex-a5", 58 1.2.4.2 skrll "arm,cortex-a7", 59 1.2.4.2 skrll "arm,cortex-a8", 60 1.2.4.2 skrll "arm,cortex-a9", 61 1.2.4.2 skrll "arm,cortex-a12", 62 1.2.4.2 skrll "arm,cortex-a15", 63 1.2.4.2 skrll "arm,cortex-a17", 64 1.2.4.2 skrll "arm,cortex-a53", 65 1.2.4.2 skrll "arm,cortex-a57", 66 1.2.4.2 skrll "arm,cortex-a72", 67 1.2.4.2 skrll "arm,cortex-a73", 68 1.2.4.2 skrll NULL 69 1.2.4.2 skrll }; 70 1.2.4.2 skrll struct fdt_attach_args * const faa = aux; 71 1.2.4.2 skrll int is_compatible; 72 1.2.4.2 skrll bus_addr_t mpidr; 73 1.2.4.2 skrll 74 1.2.4.2 skrll is_compatible = of_match_compatible(faa->faa_phandle, compatible); 75 1.2.4.2 skrll if (!is_compatible) 76 1.2.4.2 skrll return 0; 77 1.2.4.2 skrll 78 1.2.4.2 skrll /* XXX NetBSD requires all CPUs to be in the same cluster */ 79 1.2.4.2 skrll if (fdtbus_get_reg(faa->faa_phandle, 0, &mpidr, NULL) != 0) 80 1.2.4.2 skrll return 0; 81 1.2.4.2 skrll const uint32_t bp_mpidr = armreg_mpidr_read(); 82 1.2.4.2 skrll const u_int bp_clid = __SHIFTOUT(bp_mpidr, CORTEXA9_MPIDR_CLID); 83 1.2.4.2 skrll const u_int clid = __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CLID); 84 1.2.4.2 skrll if (bp_clid != clid) 85 1.2.4.2 skrll return 0; 86 1.2.4.2 skrll 87 1.2.4.2 skrll return is_compatible; 88 1.2.4.2 skrll } 89 1.2.4.2 skrll 90 1.2.4.2 skrll static void 91 1.2.4.2 skrll cpu_fdt_attach(device_t parent, device_t self, void *aux) 92 1.2.4.2 skrll { 93 1.2.4.2 skrll struct cpu_fdt_softc * const sc = device_private(self); 94 1.2.4.2 skrll struct fdt_attach_args * const faa = aux; 95 1.2.4.2 skrll bus_addr_t mpidr; 96 1.2.4.2 skrll 97 1.2.4.2 skrll sc->sc_dev = self; 98 1.2.4.2 skrll sc->sc_phandle = faa->faa_phandle; 99 1.2.4.2 skrll 100 1.2.4.2 skrll if (fdtbus_get_reg(sc->sc_phandle, 0, &mpidr, NULL) != 0) { 101 1.2.4.2 skrll aprint_error(": missing 'reg' property\n"); 102 1.2.4.2 skrll return; 103 1.2.4.2 skrll } 104 1.2.4.2 skrll 105 1.2.4.2 skrll /* Attach the CPU */ 106 1.2.4.2 skrll cpu_attach(self, __SHIFTOUT(mpidr, CORTEXA9_MPIDR_CPUID)); 107 1.2.4.2 skrll } 108
Indexes created Wed Oct 01 19:09:53 GMT 2025