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| Rev | Author | Line No. | Line |
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| 885 | decky | 1 | /* |
| 2 | * Copyright (C) 2005 Martin Decky |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include "ofw.h" |
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| 1058 | decky | 30 | #include "asm.h" |
| 953 | decky | 31 | #include "printf.h" |
| 885 | decky | 32 | |
| 964 | decky | 33 | #define MAX_OFW_ARGS 10 |
| 34 | |||
| 35 | typedef unsigned int ofw_arg_t; |
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| 36 | typedef unsigned int ihandle; |
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| 37 | typedef unsigned int phandle; |
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| 38 | |||
| 39 | /** OpenFirmware command structure |
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| 40 | * |
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| 41 | */ |
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| 42 | typedef struct { |
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| 43 | const char *service; /**< Command name */ |
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| 44 | unsigned int nargs; /**< Number of in arguments */ |
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| 45 | unsigned int nret; /**< Number of out arguments */ |
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| 46 | ofw_arg_t args[MAX_OFW_ARGS]; /**< List of arguments */ |
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| 47 | } ofw_args_t; |
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| 48 | |||
| 49 | typedef void (*ofw_entry)(ofw_args_t *); |
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| 50 | |||
| 51 | |||
| 885 | decky | 52 | ofw_entry ofw; |
| 53 | |||
| 54 | phandle ofw_chosen; |
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| 953 | decky | 55 | ihandle ofw_mmu; |
| 885 | decky | 56 | ihandle ofw_stdout; |
| 57 | |||
| 58 | |||
| 964 | decky | 59 | static int ofw_call(const char *service, const int nargs, const int nret, ...) |
| 885 | decky | 60 | { |
| 61 | va_list list; |
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| 62 | ofw_args_t args; |
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| 63 | int i; |
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| 64 | |||
| 65 | args.service = service; |
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| 66 | args.nargs = nargs; |
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| 67 | args.nret = nret; |
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| 68 | |||
| 69 | va_start(list, nret); |
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| 70 | for (i = 0; i < nargs; i++) |
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| 71 | args.args[i] = va_arg(list, ofw_arg_t); |
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| 72 | va_end(list); |
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| 73 | |||
| 74 | for (i = 0; i < nret; i++) |
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| 75 | args.args[i + nargs] = 0; |
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| 76 | |||
| 77 | ofw(&args); |
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| 78 | |||
| 956 | decky | 79 | return args.args[nargs]; |
| 885 | decky | 80 | } |
| 81 | |||
| 82 | |||
| 964 | decky | 83 | static phandle ofw_find_device(const char *name) |
| 953 | decky | 84 | { |
| 964 | decky | 85 | return ofw_call("finddevice", 1, 1, name); |
| 86 | } |
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| 87 | |||
| 88 | |||
| 89 | static int ofw_get_property(const phandle device, const char *name, const void *buf, const int buflen) |
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| 90 | { |
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| 91 | return ofw_call("getprop", 4, 1, device, name, buf, buflen); |
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| 92 | } |
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| 93 | |||
| 94 | static ihandle ofw_open(const char *name) |
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| 95 | { |
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| 953 | decky | 96 | return ofw_call("open", 1, 1, name); |
| 97 | } |
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| 98 | |||
| 99 | |||
| 964 | decky | 100 | void init(void) |
| 885 | decky | 101 | { |
| 964 | decky | 102 | ofw_chosen = ofw_find_device("/chosen"); |
| 103 | if (ofw_chosen == -1) |
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| 104 | halt(); |
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| 885 | decky | 105 | |
| 964 | decky | 106 | if (ofw_get_property(ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0) |
| 107 | ofw_stdout = 0; |
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| 108 | |||
| 109 | ofw_mmu = ofw_open("/mmu"); |
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| 110 | if (ofw_mmu == -1) { |
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| 111 | puts("Unable to open /mmu node\n"); |
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| 112 | halt(); |
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| 113 | } |
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| 885 | decky | 114 | } |
| 115 | |||
| 116 | |||
| 964 | decky | 117 | void ofw_write(const char *str, const int len) |
| 885 | decky | 118 | { |
| 964 | decky | 119 | if (ofw_stdout == 0) |
| 120 | return; |
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| 121 | |||
| 122 | ofw_call("write", 3, 1, ofw_stdout, str, len); |
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| 885 | decky | 123 | } |
| 124 | |||
| 125 | |||
| 956 | decky | 126 | void *ofw_translate(const void *virt) |
| 885 | decky | 127 | { |
| 956 | decky | 128 | return (void *) ofw_call("call-method", 7, 1, "translate", ofw_mmu, virt, 0, 0, 0, 0); |
| 885 | decky | 129 | } |
| 953 | decky | 130 | |
| 131 | |||
| 1075 | decky | 132 | int ofw_map(const void *phys, const void *virt, const int size, const int mode) |
| 133 | { |
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| 134 | return ofw_call("call-method", 6, 1, "map", ofw_mmu, mode, size, virt, phys); |
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| 135 | } |
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| 136 | |||
| 137 | |||
| 964 | decky | 138 | int ofw_memmap(memmap_t *map) |
| 139 | { |
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| 140 | int i; |
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| 141 | int ret; |
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| 142 | |||
| 143 | phandle handle = ofw_find_device("/memory"); |
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| 144 | if (handle == -1) |
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| 145 | return false; |
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| 146 | |||
| 147 | ret = ofw_get_property(handle, "reg", &map->zones, sizeof(map->zones)); |
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| 148 | if (ret == -1) |
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| 149 | return false; |
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| 150 | |||
| 151 | map->total = 0; |
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| 152 | map->count = 0; |
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| 153 | for (i = 0; i < MEMMAP_MAX_RECORDS; i++) { |
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| 154 | if (map->zones[i].size == 0) |
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| 155 | break; |
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| 156 | map->count++; |
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| 157 | map->total += map->zones[i].size; |
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| 158 | } |
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| 159 | } |