1 | /* |
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2 | * This program is free software; you can redistribute it and/or modify |
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3 | * it under the terms of the GNU General Public License as published by |
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4 | * the Free Software Foundation; either version 2 of the License, or |
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5 | * (at your option) any later version. |
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6 | * |
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7 | * This program is distributed in the hope that it will be useful, |
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8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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10 | * GNU General Public License for more details. |
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11 | * |
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12 | * You should have received a copy of the GNU General Public License |
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13 | * along with this program; if not, write to the Free Software |
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14 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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15 | * |
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16 | * Copyright (C) IBM Corp. 2006 |
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17 | * |
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18 | * Authors: Jimi Xenidis <jimix@watson.ibm.com> |
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19 | */ |
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20 | |
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21 | #include <xen/config.h> |
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22 | #include <xen/init.h> |
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23 | #include <xen/lib.h> |
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24 | #include <xen/errno.h> |
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25 | #include "of-devtree.h" |
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26 | #include "rtas.h" |
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27 | |
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28 | static int rtas_halt_token = -1; |
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29 | static int rtas_reboot_token = -1; |
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30 | int rtas_entry; |
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31 | unsigned long rtas_msr; |
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32 | unsigned long rtas_base; |
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33 | unsigned long rtas_end; |
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34 | |
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35 | struct rtas_args { |
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36 | int ra_token; |
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37 | int ra_nargs; |
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38 | int ra_nrets; |
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39 | int ra_args[10]; |
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40 | } __attribute__ ((aligned(8))); |
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41 | |
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42 | static int rtas_call(struct rtas_args *r) |
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43 | { |
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44 | if (rtas_entry == 0) |
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45 | return -ENOSYS; |
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46 | |
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47 | return prom_call(r, rtas_base, rtas_entry, rtas_msr); |
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48 | } |
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49 | |
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50 | int __init rtas_init(void *m) |
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51 | { |
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52 | static const char halt[] = "power-off"; |
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53 | static const char reboot[] = "system-reboot"; |
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54 | ofdn_t n; |
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55 | |
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56 | if (rtas_entry == 0) |
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57 | return -ENOSYS; |
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58 | |
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59 | n = ofd_node_find(m, "/rtas"); |
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60 | if (n <= 0) |
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61 | return -ENOSYS; |
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62 | |
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63 | ofd_getprop(m, n, halt, |
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64 | &rtas_halt_token, sizeof (rtas_halt_token)); |
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65 | ofd_getprop(m, n, reboot, |
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66 | &rtas_reboot_token, sizeof (rtas_reboot_token)); |
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67 | return 1; |
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68 | } |
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69 | |
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70 | int |
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71 | rtas_halt(void) |
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72 | { |
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73 | struct rtas_args r; |
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74 | |
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75 | if (rtas_halt_token == -1) |
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76 | return -1; |
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77 | |
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78 | r.ra_token = rtas_halt_token; |
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79 | r.ra_nargs = 2; |
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80 | r.ra_nrets = 1; |
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81 | r.ra_args[0] = 0; |
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82 | r.ra_args[1] = 0; |
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83 | |
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84 | return rtas_call(&r); |
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85 | } |
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86 | |
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87 | int |
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88 | rtas_reboot(void) |
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89 | { |
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90 | struct rtas_args r; |
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91 | |
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92 | if (rtas_reboot_token == -1) |
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93 | return -ENOSYS; |
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94 | |
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95 | r.ra_token = rtas_reboot_token; |
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96 | r.ra_nargs = 2; |
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97 | r.ra_nrets = 1; |
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98 | r.ra_args[0] = 0; |
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99 | r.ra_args[1] = 0; |
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100 | |
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101 | return rtas_call(&r); |
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102 | } |
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