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186 | 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 <arch/drivers/ofw.h> |
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30 | #include <stdarg.h> |
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31 | |||
32 | ihandle ofw_chosen; |
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33 | ihandle ofw_stdout; |
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34 | ofw_entry ofw; |
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35 | |||
36 | void ofw_init(void) |
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37 | { |
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38 | ofw_chosen = ofw_call("finddevice", 1, 1, "/chosen"); |
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39 | if (ofw_chosen == -1) |
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40 | ofw_done(); |
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41 | |||
42 | if (ofw_call("getprop", 4, 1, ofw_chosen, "stdout", &ofw_stdout, sizeof(ofw_stdout)) <= 0) |
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43 | ofw_stdout = 0; |
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44 | } |
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45 | |||
46 | void ofw_done(void) |
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47 | { |
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48 | ofw_call("exit", 0, 0); |
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49 | cpu_halt(); |
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50 | } |
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51 | |||
52 | int ofw_call(const char *service, const int nargs, const int nret, ...) |
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53 | { |
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54 | va_list list; |
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55 | struct ofw_args_t args; |
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56 | int i; |
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57 | |||
58 | args.service = service; |
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59 | args.nargs = nargs; |
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60 | args.nret = nret; |
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61 | |||
62 | va_start(list, nret); |
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63 | for (i = 0; i < nargs; i++) |
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64 | args.args[i] = va_arg(list, ofw_arg_t); |
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65 | va_end(list); |
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66 | |||
67 | for (i = 0; i < nret; i++) |
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68 | args.args[i + nargs] = 0; |
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69 | |||
70 | ofw(&args); |
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71 | |||
72 | return args.args[nargs]; |
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73 | } |
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74 | |||
75 | void ofw_putchar(const char ch) |
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76 | { |
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77 | if (ofw_stdout == 0) |
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78 | return; |
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79 | |||
80 | ofw_call("write", 3, 1, ofw_stdout, ch, 1); |
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81 | } |
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82 | |||
83 | void putchar(const char ch) |
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84 | { |
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85 | ofw_putchar(ch); |
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86 | } |