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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
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 | #ifndef __ARCH_H__ |
29 | #ifndef __ARCH_H__ |
30 | #define __ARCH_H__ |
30 | #define __ARCH_H__ |
31 | 31 | ||
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
34 | 34 | ||
35 | #include <cpu.h> |
35 | #include <cpu.h> |
36 | #include <arch/cpu.h> |
36 | #include <arch/cpu.h> |
37 | #include <arch/asm.h> |
37 | #include <arch/asm.h> |
38 | 38 | ||
39 | #include <proc/thread.h> |
39 | #include <proc/thread.h> |
40 | #include <proc/task.h> |
40 | #include <proc/task.h> |
41 | 41 | ||
42 | /* |
- | |
43 | * NOTE: |
- | |
44 | * CPU, THREAD and TASK are not preemption-safe. |
- | |
45 | * Provisions must be made to prevent preemption prior |
- | |
46 | * to using these macros. Simple cpu_priority_high() |
- | |
47 | * call will suffice. |
- | |
48 | */ |
- | |
49 | #define CPU (&cpus[CPU_ID_ARCH]) |
42 | #define CPU THE->cpu |
50 | #define THREAD (cpu_private_data[CPU_ID_ARCH].thread) |
43 | #define THREAD THE->thread |
51 | #define TASK (cpu_private_data[CPU_ID_ARCH].task) |
44 | #define TASK THE->task |
52 | 45 | ||
53 | /* |
46 | /* |
54 | * For each possible kernel stack, structure |
47 | * For each possible kernel stack, structure |
55 | * of the following type will be placed at |
48 | * of the following type will be placed at |
56 | * the bottom of the stack. |
49 | * the bottom of the stack. |
57 | */ |
50 | */ |
58 | struct the { |
51 | struct the { |
59 | int preemption_disabled; |
52 | int preemption_disabled; |
60 | thread_t *thread; /* current thread */ |
53 | thread_t *thread; /* current thread */ |
61 | task_t *task; /* current task */ |
54 | task_t *task; /* current task */ |
62 | cpu_t *cpu; /* executing cpu */ |
55 | cpu_t *cpu; /* executing cpu */ |
63 | }; |
56 | }; |
64 | 57 | ||
65 | #define THE ((the_t *)(get_stack_base())) |
58 | #define THE ((the_t *)(get_stack_base())) |
66 | 59 | ||
67 | extern void the_initialize(the_t *the); |
60 | extern void the_initialize(the_t *the); |
68 | extern void the_copy(the_t *src, the_t *dst); |
61 | extern void the_copy(the_t *src, the_t *dst); |
69 | 62 | ||
70 | extern void arch_pre_mm_init(void); |
63 | extern void arch_pre_mm_init(void); |
71 | extern void arch_post_mm_init(void); |
64 | extern void arch_post_mm_init(void); |
72 | extern void arch_late_init(void); |
65 | extern void arch_late_init(void); |
73 | extern void calibrate_delay_loop(void); |
66 | extern void calibrate_delay_loop(void); |
74 | 67 | ||
75 | extern pri_t cpu_priority_high(void); |
68 | extern pri_t cpu_priority_high(void); |
76 | extern pri_t cpu_priority_low(void); |
69 | extern pri_t cpu_priority_low(void); |
77 | extern void cpu_priority_restore(pri_t pri); |
70 | extern void cpu_priority_restore(pri_t pri); |
78 | extern pri_t cpu_priority_read(void); |
71 | extern pri_t cpu_priority_read(void); |
79 | 72 | ||
80 | #endif |
73 | #endif |
81 | 74 |