1 /*- 2 * Copyright (c) 2013 Andrew Turner 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "opt_platform.h" 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/smp.h> 34 35 #include <arm/include/platform.h> 36 #include <arm/include/platformvar.h> 37 38 #include <dev/ofw/openfirm.h> 39 #include <dev/ofw/ofw_bus_subr.h> 40 #include <dev/ofw/ofw_cpu.h> 41 #include <dev/fdt/fdt_common.h> 42 43 #include "platform_if.h" 44 45 #define FDT_PLATFORM(plat) \ 46 ((fdt_platform_def_t *)(plat)->cls->baseclasses[0]) 47 48 #if defined(SMP) 49 static platform_mp_setmaxid_t fdt_platform_mp_setmaxid; 50 #endif 51 52 static int 53 fdt_platform_probe(platform_t plat) 54 { 55 const char *compat; 56 phandle_t root; 57 58 /* 59 * TODO: Make these KASSERTs, we should only be here if we 60 * are using the FDT platform magic. 61 */ 62 if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL) 63 return 1; 64 65 /* Is the device is compatible? */ 66 root = OF_finddevice("/"); 67 compat = FDT_PLATFORM(plat)->fdt_compatible; 68 if (ofw_bus_node_is_compatible(root, compat) != 0) 69 return 0; 70 71 /* Not compatible, return an error */ 72 return 1; 73 } 74 75 #if defined(SMP) 76 static bool 77 fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 78 { 79 80 if (mp_maxid < id) 81 mp_maxid = id; 82 83 return (true); 84 } 85 86 static void 87 fdt_platform_mp_setmaxid(platform_t plat) 88 { 89 90 mp_maxid = PCPU_GET(cpuid); 91 mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true); 92 if (mp_ncpus < 1) 93 mp_ncpus = 1; 94 mp_ncpus = MIN(mp_ncpus, MAXCPU); 95 } 96 #endif 97 98 platform_method_t fdt_platform_methods[] = { 99 PLATFORMMETHOD(platform_probe, fdt_platform_probe), 100 101 #if defined(SMP) 102 PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid), 103 #endif 104 105 PLATFORMMETHOD_END 106 }; 107 108