Rev 4153 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
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| 1 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 1 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 1729 | decky | 29 | /** @addtogroup main |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | |||
| 1248 | jermar | 33 | /** |
| 1702 | cejka | 34 | * @file |
| 1248 | jermar | 35 | * @brief Userspace bootstrap thread. |
| 36 | * |
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| 37 | * This file contains uinit kernel thread wich is used to start every |
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| 38 | * userspace thread including threads created by SYS_THREAD_CREATE syscall. |
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| 39 | * |
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| 40 | * @see SYS_THREAD_CREATE |
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| 41 | */ |
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| 42 | |||
| 1 | jermar | 43 | #include <main/uinit.h> |
| 44 | #include <arch/types.h> |
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| 45 | #include <proc/thread.h> |
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| 46 | #include <userspace.h> |
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| 1066 | jermar | 47 | #include <mm/slab.h> |
| 2446 | jermar | 48 | #include <arch.h> |
| 4153 | mejdrech | 49 | #include <udebug/udebug.h> |
| 1 | jermar | 50 | |
| 4153 | mejdrech | 51 | |
| 1066 | jermar | 52 | /** Thread used to bring up userspace thread. |
| 53 | * |
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| 2087 | jermar | 54 | * @param arg Pointer to structure containing userspace entry and stack |
| 55 | * addresses. |
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| 1066 | jermar | 56 | */ |
| 1 | jermar | 57 | void uinit(void *arg) |
| 58 | { |
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| 1066 | jermar | 59 | uspace_arg_t uarg; |
| 2446 | jermar | 60 | |
| 61 | /* |
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| 62 | * So far, we don't have a use for joining userspace threads so we |
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| 63 | * immediately detach each uinit thread. If joining of userspace threads |
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| 64 | * is required, some userspace API based on the kernel mechanism will |
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| 65 | * have to be implemented. Moreover, garbage collecting of threads that |
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| 66 | * didn't detach themselves and nobody else joined them will have to be |
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| 67 | * deployed for the event of forceful task termination. |
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| 68 | */ |
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| 69 | thread_detach(THREAD); |
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| 4153 | mejdrech | 70 | |
| 71 | #ifdef CONFIG_UDEBUG |
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| 72 | udebug_stoppable_end(); |
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| 73 | #endif |
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| 1066 | jermar | 74 | |
| 75 | uarg.uspace_entry = ((uspace_arg_t *) arg)->uspace_entry; |
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| 76 | uarg.uspace_stack = ((uspace_arg_t *) arg)->uspace_stack; |
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| 1078 | jermar | 77 | uarg.uspace_uarg = ((uspace_arg_t *) arg)->uspace_uarg; |
| 2447 | jermar | 78 | uarg.uspace_thread_function = NULL; |
| 79 | uarg.uspace_thread_arg = NULL; |
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| 1066 | jermar | 80 | |
| 81 | free((uspace_arg_t *) arg); |
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| 4718 | mejdrech | 82 | |
| 83 | /* |
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| 84 | * Disable interrupts so that the execution of userspace() is not |
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| 85 | * disturbed by any interrupts as some of the userspace() |
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| 86 | * implementations will switch to the userspace stack before switching |
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| 87 | * the mode. |
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| 88 | */ |
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| 89 | (void) interrupts_disable(); |
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| 1066 | jermar | 90 | userspace(&uarg); |
| 1 | jermar | 91 | } |
| 1702 | cejka | 92 | |
| 1729 | decky | 93 | /** @} |
| 1702 | cejka | 94 | */ |