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| Rev | Author | Line No. | Line |
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| 662 | 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 | |||
| 678 | decky | 29 | #include <syscall/syscall.h> |
| 714 | decky | 30 | #include <proc/thread.h> |
| 712 | decky | 31 | #include <print.h> |
| 32 | #include <putchar.h> |
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| 955 | palkovsky | 33 | #include <ipc/ipc.h> |
| 34 | #include <errno.h> |
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| 35 | #include <proc/task.h> |
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| 36 | #include <arch.h> |
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| 37 | #include <debug.h> |
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| 662 | decky | 38 | |
| 955 | palkovsky | 39 | static __native sys_ctl(void) { |
| 714 | decky | 40 | printf("Thread finished\n"); |
| 41 | thread_exit(); |
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| 42 | /* Unreachable */ |
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| 662 | decky | 43 | return 0; |
| 44 | } |
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| 45 | |||
| 955 | palkovsky | 46 | static __native sys_io(int fd, const void * buf, size_t count) { |
| 712 | decky | 47 | |
| 48 | // TODO: buf sanity checks and a lot of other stuff ... |
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| 49 | |||
| 50 | size_t i; |
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| 51 | |||
| 52 | for (i = 0; i < count; i++) |
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| 53 | putchar(((char *) buf)[i]); |
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| 54 | |||
| 714 | decky | 55 | return count; |
| 662 | decky | 56 | } |
| 57 | |||
| 959 | palkovsky | 58 | /** Send a call over IPC, wait for reply, return to user |
| 955 | palkovsky | 59 | * |
| 60 | * @return Call identification, returns -1 on fatal error, |
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| 61 | -2 on 'Too many async request, handle answers first |
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| 62 | */ |
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| 959 | palkovsky | 63 | static __native sys_ipc_call_sync(__native phoneid, __native arg1, |
| 64 | __native arg2, __native *respdata) |
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| 955 | palkovsky | 65 | { |
| 66 | call_t *call; |
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| 67 | phone_t *phone; |
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| 959 | palkovsky | 68 | /* Special answerbox for synchronous messages */ |
| 955 | palkovsky | 69 | |
| 70 | if (phoneid >= IPC_MAX_PHONES) |
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| 71 | return -ENOENT; |
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| 72 | |||
| 73 | phone = &TASK->phones[phoneid]; |
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| 74 | if (!phone->callee) |
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| 75 | return -ENOENT; |
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| 76 | |||
| 959 | palkovsky | 77 | call = ipc_call_alloc(); |
| 78 | call->data[0] = arg1; |
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| 79 | call->data[1] = arg2; |
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| 80 | |||
| 81 | ipc_call_sync(phone, call); |
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| 955 | palkovsky | 82 | |
| 959 | palkovsky | 83 | copy_to_uspace(respdata, &call->data, sizeof(__native) * IPC_CALL_LEN); |
| 84 | |||
| 85 | return 0; |
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| 86 | } |
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| 87 | |||
| 88 | /** Send an asynchronous call over ipc |
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| 89 | * |
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| 90 | * @return Call identification, returns -1 on fatal error, |
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| 91 | -2 on 'Too many async request, handle answers first |
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| 92 | */ |
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| 93 | static __native sys_ipc_call_async(__native phoneid, __native arg1, |
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| 94 | __native arg2) |
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| 95 | { |
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| 96 | call_t *call; |
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| 97 | phone_t *phone; |
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| 98 | |||
| 99 | if (phoneid >= IPC_MAX_PHONES) |
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| 100 | return -ENOENT; |
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| 101 | |||
| 102 | phone = &TASK->phones[phoneid]; |
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| 103 | if (!phone->callee) |
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| 104 | return -ENOENT; |
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| 105 | |||
| 106 | |||
| 955 | palkovsky | 107 | /* TODO: Check that we did not exceed system imposed maximum |
| 108 | * of asynchrnously sent messages |
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| 109 | * - the userspace should be able to handle it correctly |
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| 110 | */ |
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| 111 | call = ipc_call_alloc(); |
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| 112 | call->data[0] = arg1; |
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| 113 | call->data[1] = arg2; |
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| 114 | ipc_call(phone, call); |
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| 115 | |||
| 116 | return (__native) call; |
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| 117 | } |
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| 118 | |||
| 119 | /** Send IPC answer */ |
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| 120 | static __native sys_ipc_answer(__native callid, __native arg1, __native arg2) |
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| 121 | { |
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| 122 | call_t *call; |
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| 123 | |||
| 124 | /* Check that the user is not sending us answer callid */ |
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| 125 | ASSERT(! (callid & 1)); |
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| 126 | /* TODO: Check that the callid is in the dispatch table */ |
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| 127 | call = (call_t *) callid; |
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| 128 | |||
| 129 | call->data[0] = arg1; |
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| 130 | call->data[1] = arg2; |
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| 131 | |||
| 132 | ipc_answer(&TASK->answerbox, call); |
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| 133 | return 0; |
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| 134 | } |
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| 135 | |||
| 136 | /** Wait for incoming ipc call or answer |
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| 137 | * |
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| 138 | * @param result |
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| 139 | * @param flags |
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| 140 | * @return Callid, if callid & 1, then the call is answer |
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| 141 | */ |
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| 142 | static __native sys_ipc_wait_for_call(__native *calldata, __native flags) |
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| 143 | { |
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| 144 | call_t *call; |
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| 145 | |||
| 146 | call = ipc_wait_for_call(&TASK->answerbox, flags); |
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| 147 | copy_to_uspace(calldata, &call->data, sizeof(__native) * IPC_CALL_LEN); |
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| 148 | |||
| 149 | if (call->flags & IPC_CALL_ANSWERED) |
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| 150 | return ((__native)call) | 1; |
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| 151 | return (__native)call; |
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| 152 | } |
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| 153 | |||
| 154 | |||
| 662 | decky | 155 | syshandler_t syscall_table[SYSCALL_END] = { |
| 156 | sys_ctl, |
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| 955 | palkovsky | 157 | sys_io, |
| 959 | palkovsky | 158 | sys_ipc_call_sync, |
| 159 | sys_ipc_call_async, |
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| 955 | palkovsky | 160 | sys_ipc_answer, |
| 161 | sys_ipc_wait_for_call |
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| 662 | decky | 162 | }; |