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/param.h> 30 #include <sys/smp.h> 31 32 #include <arm/include/platform.h> 33 #include <arm/include/platformvar.h> 34 35 #include <dev/ofw/openfirm.h> 36 #include <dev/ofw/ofw_bus_subr.h> 37 #include <dev/ofw/ofw_cpu.h> 38 #include <dev/fdt/fdt_common.h> 39 40 #include "platform_if.h" 41 42 #define FDT_PLATFORM(plat) \ 43 ((fdt_platform_def_t *)(plat)->cls->baseclasses[0]) 44 45 #if defined(SMP) 46 static platform_mp_setmaxid_t fdt_platform_mp_setmaxid; 47 #endif 48 49 static int 50 fdt_platform_probe(platform_t plat) 51 { 52 const char *compat; 53 phandle_t root; 54 55 /* 56 * TODO: Make these KASSERTs, we should only be here if we 57 * are using the FDT platform magic. 58 */ 59 if (plat->cls == NULL || FDT_PLATFORM(plat) == NULL) 60 return 1; 61 62 /* Is the device is compatible? */ 63 root = OF_finddevice("/"); 64 compat = FDT_PLATFORM(plat)->fdt_compatible; 65 if (ofw_bus_node_is_compatible(root, compat) != 0) 66 return 0; 67 68 /* Not compatible, return an error */ 69 return 1; 70 } 71 72 #if defined(SMP) 73 static bool 74 fdt_platform_maxid(u_int id, phandle_t node, u_int addr_cells, pcell_t *reg) 75 { 76 77 if (mp_maxid < id) 78 mp_maxid = id; 79 80 return (true); 81 } 82 83 static void 84 fdt_platform_mp_setmaxid(platform_t plat) 85 { 86 87 mp_maxid = PCPU_GET(cpuid); 88 mp_ncpus = ofw_cpu_early_foreach(fdt_platform_maxid, true); 89 if (mp_ncpus < 1) 90 mp_ncpus = 1; 91 mp_ncpus = MIN(mp_ncpus, MAXCPU); 92 } 93 #endif 94 95 platform_method_t fdt_platform_methods[] = { 96 PLATFORMMETHOD(platform_probe, fdt_platform_probe), 97 98 #if defined(SMP) 99 PLATFORMMETHOD(platform_mp_setmaxid, fdt_platform_mp_setmaxid), 100 #endif 101 102 PLATFORMMETHOD_END 103 }; 104 105