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Rev | Author | Line No. | Line |
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1999 | decky | 1 | /* |
2445 | decky | 2 | * Copyright (c) 2007 Michal Konopa |
3 | * Copyright (c) 2007 Martin Jelen |
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4 | * Copyright (c) 2007 Peter Majer |
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1999 | decky | 5 | * All rights reserved. |
6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * |
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11 | * - Redistributions of source code must retain the above copyright |
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12 | * notice, this list of conditions and the following disclaimer. |
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13 | * - Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * - The name of the author may not be used to endorse or promote products |
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17 | * derived from this software without specific prior written permission. |
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18 | * |
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19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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29 | */ |
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30 | |||
31 | /** @addtogroup rd |
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32 | * @{ |
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33 | */ |
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34 | |||
35 | /** |
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36 | * @file rd.c |
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37 | * @brief Initial RAM disk for HelenOS. |
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38 | */ |
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39 | |||
40 | #include <ipc/ipc.h> |
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41 | #include <ipc/services.h> |
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42 | #include <ipc/ns.h> |
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2005 | decky | 43 | #include <sysinfo.h> |
44 | #include <as.h> |
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45 | #include <ddi.h> |
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46 | #include <align.h> |
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47 | #include <bool.h> |
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1999 | decky | 48 | #include <errno.h> |
49 | #include <async.h> |
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2445 | decky | 50 | #include <align.h> |
51 | #include <async.h> |
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52 | #include "rd.h" |
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1999 | decky | 53 | |
2445 | decky | 54 | static void *rd_addr; |
55 | static void *fs_addr; |
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1999 | decky | 56 | |
57 | static void rd_connection(ipc_callid_t iid, ipc_call_t *icall) |
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58 | { |
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59 | ipc_callid_t callid; |
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60 | ipc_call_t call; |
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61 | int retval; |
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62 | |||
63 | ipc_answer_fast(iid, 0, 0, 0); |
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2445 | decky | 64 | ipcarg_t offset; |
1999 | decky | 65 | |
66 | while (1) { |
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67 | callid = async_get_call(&call); |
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68 | switch (IPC_GET_METHOD(call)) { |
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2471 | jermar | 69 | case IPC_M_PHONE_HUNGUP: |
70 | ipc_answer_fast(callid, 0, 0, 0); |
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71 | return; |
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72 | case IPC_M_AS_AREA_SEND: |
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73 | ipc_answer_fast(callid, 0, (uintptr_t) fs_addr, 0); |
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74 | continue; |
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75 | case RD_READ_BLOCK: |
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76 | offset = IPC_GET_ARG1(call); |
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77 | memcpy((void *) fs_addr, rd_addr + offset, BLOCK_SIZE); |
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78 | retval = EOK; |
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79 | break; |
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80 | default: |
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81 | retval = EINVAL; |
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1999 | decky | 82 | } |
83 | ipc_answer_fast(callid, retval, 0, 0); |
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2471 | jermar | 84 | } |
1999 | decky | 85 | } |
86 | |||
87 | |||
2005 | decky | 88 | static bool rd_init(void) |
1999 | decky | 89 | { |
2445 | decky | 90 | int retval, flags; |
91 | |||
2005 | decky | 92 | size_t rd_size = sysinfo_value("rd.size"); |
2471 | jermar | 93 | void *rd_ph_addr = (void *) sysinfo_value("rd.address.physical"); |
1999 | decky | 94 | |
2005 | decky | 95 | if (rd_size == 0) |
96 | return false; |
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1999 | decky | 97 | |
2445 | decky | 98 | rd_addr = as_get_mappable_page(rd_size); |
2005 | decky | 99 | |
2445 | decky | 100 | flags = AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE; |
2471 | jermar | 101 | retval = physmem_map(rd_ph_addr, rd_addr, |
102 | ALIGN_UP(rd_size, PAGE_SIZE) >> PAGE_WIDTH, flags); |
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2445 | decky | 103 | |
104 | if (retval < 0) |
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105 | return false; |
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2005 | decky | 106 | |
2445 | decky | 107 | size_t fs_size = ALIGN_UP(BLOCK_SIZE * sizeof(char), PAGE_SIZE); |
108 | fs_addr = as_get_mappable_page(fs_size); |
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109 | |||
2005 | decky | 110 | return true; |
111 | } |
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1999 | decky | 112 | |
2005 | decky | 113 | int main(int argc, char **argv) |
114 | { |
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115 | if (rd_init()) { |
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116 | ipcarg_t phonead; |
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117 | |||
118 | async_set_client_connection(rd_connection); |
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119 | |||
120 | /* Register service at nameserver */ |
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121 | if (ipc_connect_to_me(PHONE_NS, SERVICE_RD, 0, &phonead) != 0) |
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122 | return -1; |
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123 | |||
124 | async_manager(); |
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125 | |||
126 | /* Never reached */ |
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127 | return 0; |
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128 | } |
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129 | |||
130 | return -1; |
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1999 | decky | 131 | } |
132 | |||
133 | /** |
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134 | * @} |
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135 | */ |