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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Michal Kebrt |
2 | * Copyright (c) 2007 Michal Kebrt |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup libcarm32 |
29 | /** @addtogroup libcarm32 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | * @brief Fibrils related declarations. |
33 | * @brief Fibrils related declarations. |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #ifndef LIBC_arm32_FIBRIL_H_ |
36 | #ifndef LIBC_arm32_FIBRIL_H_ |
37 | #define LIBC_arm32_FIBRIL_H_ |
37 | #define LIBC_arm32_FIBRIL_H_ |
38 | 38 | ||
39 | #include <sys/types.h> |
39 | #include <sys/types.h> |
40 | #include <align.h> |
40 | #include <align.h> |
41 | #include "thread.h" |
41 | #include "thread.h" |
42 | 42 | ||
43 | /** Size of a stack item */ |
43 | /** Size of a stack item */ |
44 | #define STACK_ITEM_SIZE 4 |
44 | #define STACK_ITEM_SIZE 4 |
45 | 45 | ||
46 | /** Stack alignment - see <a href="http://www.arm.com/support/faqdev/14269.html">ABI</a> for details */ |
46 | /** Stack alignment - see <a href="http://www.arm.com/support/faqdev/14269.html">ABI</a> for details */ |
47 | #define STACK_ALIGNMENT 8 |
47 | #define STACK_ALIGNMENT 8 |
48 | 48 | ||
49 | #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
49 | #define SP_DELTA (0 + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT)) |
50 | 50 | ||
51 | 51 | ||
52 | /** Sets data to the context. |
52 | /** Sets data to the context. |
53 | * |
53 | * |
54 | * @param c Context (#context_t). |
54 | * @param c Context (#context_t). |
55 | * @param _pc Program counter. |
55 | * @param _pc Program counter. |
56 | * @param stack Stack address. |
56 | * @param stack Stack address. |
57 | * @param size Stack size. |
57 | * @param size Stack size. |
58 | * @param ptls Pointer to the TCB. |
58 | * @param ptls Pointer to the TCB. |
59 | */ |
59 | */ |
60 | #define context_set(c, _pc, stack, size, ptls) \ |
60 | #define context_set(c, _pc, stack, size, ptls) \ |
61 | (c)->pc = (sysarg_t) (_pc); \ |
61 | (c)->pc = (sysarg_t) (_pc); \ |
62 | (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \ |
62 | (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \ |
63 | (c)->tls = ((sysarg_t)(ptls)) + sizeof(tcb_t) + ARM_TP_OFFSET; |
63 | (c)->tls = ((sysarg_t)(ptls)) + sizeof(tcb_t) + ARM_TP_OFFSET; |
64 | 64 | ||
65 | 65 | ||
66 | /** Fibril context. |
66 | /** Fibril context. |
67 | * |
67 | * |
68 | * Only registers preserved accross function calls are included. r9 is used |
68 | * Only registers preserved accross function calls are included. r9 is used |
69 | * to store a TLS address. -ffixed-r9 gcc forces gcc not to use this |
69 | * to store a TLS address. -ffixed-r9 gcc forces gcc not to use this |
70 | * register. -mtp=soft forces gcc to use #__aeabi_read_tp to obtain |
70 | * register. -mtp=soft forces gcc to use #__aeabi_read_tp to obtain |
71 | * TLS address. |
71 | * TLS address. |
72 | */ |
72 | */ |
73 | typedef struct { |
73 | typedef struct { |
74 | uint32_t sp; |
74 | uint32_t sp; |
75 | uint32_t pc; |
75 | uint32_t pc; |
76 | uint32_t r4; |
76 | uint32_t r4; |
77 | uint32_t r5; |
77 | uint32_t r5; |
78 | uint32_t r6; |
78 | uint32_t r6; |
79 | uint32_t r7; |
79 | uint32_t r7; |
80 | uint32_t r8; |
80 | uint32_t r8; |
81 | uint32_t tls; |
81 | uint32_t tls; |
82 | uint32_t r10; |
82 | uint32_t r10; |
83 | uint32_t r11; |
83 | uint32_t r11; |
84 | } context_t; |
84 | } context_t; |
85 | 85 | ||
86 | 86 | ||
87 | #endif |
87 | #endif |
88 | 88 | ||
89 | /** @} |
89 | /** @} |
90 | */ |
90 | */ |
91 | 91 |