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 #include <sys/param.h> 31 #include <sys/smp.h> 32 33 #include <arm/include/platform.h> 34 #include <arm/include/platformvar.h> 35 36 #include <dev/ofw/openfirm.h> 37 #include <dev/ofw/ofw_bus_subr.h> 38 #include <dev/ofw/ofw_cpu.h> 39 #include <dev/fdt/fdt_common.h> 40 41 #include "platform_if.h" 42 43 #define FDT_PLATFORM(plat) \ 44 ((fdt_platform_def_t *)(plat)->cls->baseclasses[0]) 45 46 #if defined(SMP) 47 static platform_mp_setmaxid_t fdt_platform_mp_setmaxid; 48 #endif 49 50 static int 51 fdt_platform_probe(platform_t plat) 52 { 53 const char *compat; 54 phandle_t root; 55 56 /* 57 * TODO: Make these KASSERTs, we should only be here if we 58 * are using the FDT platform magic. 59 */ 60 if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL) 61 return 1; 62 63 /* Is the device is compatible? */ 64 root = OF_finddevice("/"); 65 compat = FDT_PLATFORM(plat)->fdt_compatible; 66 if (ofw_bus_node_is_compatible(root, compat) != 0) 67 return 0; 68 69 /* Not compatible, return an error */ 70 return 1; 71 } 72 73 #if defined(SMP) 74 static bool 75 fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 76 { 77 78 if (mp_maxid < id) 79 mp_maxid = id; 80 81 return (true); 82 } 83 84 static void 85 fdt_platform_mp_setmaxid(platform_t plat) 86 { 87 88 mp_maxid = PCPU_GET(cpuid); 89 mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true); 90 if (mp_ncpus < 1) 91 mp_ncpus = 1; 92 mp_ncpus = MIN(mp_ncpus, MAXCPU); 93 } 94 #endif 95 96 platform_method_t fdt_platform_methods[] = { 97 PLATFORMMETHOD(platform_probe, fdt_platform_probe), 98 99 #if defined(SMP) 100 PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid), 101 #endif 102 103 PLATFORMMETHOD_END 104 }; 105 106