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| Rev | Author | Line No. | Line |
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| 2128 | jermar | 1 | /* |
| 2465 | jermar | 2 | * Copyright (c) 2007 Michal Kebrt |
| 2128 | 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 | |||
| 29 | /** @addtogroup libcarm32 |
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| 30 | * @{ |
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| 31 | */ |
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| 2465 | jermar | 32 | /** @file |
| 2482 | jermar | 33 | * @brief Fibrils related declarations. |
| 2128 | jermar | 34 | */ |
| 35 | |||
| 2482 | jermar | 36 | #ifndef LIBC_arm32_FIBRIL_H_ |
| 37 | #define LIBC_arm32_FIBRIL_H_ |
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| 2128 | jermar | 38 | |
| 2541 | jermar | 39 | #include <sys/types.h> |
| 2465 | jermar | 40 | #include <align.h> |
| 41 | #include "thread.h" |
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| 2128 | jermar | 42 | |
| 2465 | jermar | 43 | /** Size of a stack item */ |
| 44 | #define STACK_ITEM_SIZE 4 |
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| 2128 | jermar | 45 | |
| 2465 | jermar | 46 | /** Stack alignment - see <a href="http://www.arm.com/support/faqdev/14269.html">ABI</a> for details */ |
| 47 | #define STACK_ALIGNMENT 8 |
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| 48 | |||
| 49 | #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
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| 50 | |||
| 51 | |||
| 52 | /** Sets data to the context. |
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| 53 | * |
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| 54 | * @param c Context (#context_t). |
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| 55 | * @param _pc Program counter. |
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| 56 | * @param stack Stack address. |
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| 57 | * @param size Stack size. |
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| 58 | * @param ptls Pointer to the TCB. |
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| 59 | */ |
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| 60 | #define context_set(c, _pc, stack, size, ptls) \ |
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| 61 | (c)->pc = (sysarg_t) (_pc); \ |
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| 62 | (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \ |
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| 63 | (c)->tls = ((sysarg_t)(ptls)) + sizeof(tcb_t) + ARM_TP_OFFSET; |
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| 64 | |||
| 65 | |||
| 2482 | jermar | 66 | /** Fibril context. |
| 2465 | jermar | 67 | * |
| 68 | * Only registers preserved accross function calls are included. r9 is used |
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| 69 | * to store a TLS address. -ffixed-r9 gcc forces gcc not to use this |
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| 70 | * register. -mtp=soft forces gcc to use #__aeabi_read_tp to obtain |
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| 71 | * TLS address. |
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| 72 | */ |
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| 2128 | jermar | 73 | typedef struct { |
| 74 | uint32_t sp; |
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| 75 | uint32_t pc; |
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| 2465 | jermar | 76 | uint32_t r4; |
| 77 | uint32_t r5; |
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| 78 | uint32_t r6; |
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| 79 | uint32_t r7; |
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| 80 | uint32_t r8; |
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| 2128 | jermar | 81 | uint32_t tls; |
| 2465 | jermar | 82 | uint32_t r10; |
| 83 | uint32_t r11; |
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| 2128 | jermar | 84 | } context_t; |
| 85 | |||
| 2465 | jermar | 86 | |
| 2128 | jermar | 87 | #endif |
| 88 | |||
| 89 | /** @} |
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| 90 | */ |