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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 arm32 |
29 | /** @addtogroup arm32 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | * @brief Declarations of functions implemented in assembly. |
33 | * @brief Declarations of functions implemented in assembly. |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #ifndef KERN_arm32_ASM_H_ |
36 | #ifndef KERN_arm32_ASM_H_ |
37 | #define KERN_arm32_ASM_H_ |
37 | #define KERN_arm32_ASM_H_ |
38 | 38 | ||
39 | #include <arch/types.h> |
39 | #include <arch/types.h> |
40 | #include <arch/stack.h> |
40 | #include <arch/stack.h> |
41 | #include <config.h> |
41 | #include <config.h> |
42 | #include <arch/interrupt.h> |
42 | #include <arch/interrupt.h> |
43 | 43 | ||
44 | /** No such instruction on ARM to sleep CPU. */ |
44 | /** No such instruction on ARM to sleep CPU. */ |
45 | static inline void cpu_sleep(void) |
45 | static inline void cpu_sleep(void) |
46 | { |
46 | { |
47 | } |
47 | } |
48 | 48 | ||
49 | static inline void pio_write_8(ioport8_t *port, uint8_t v) |
49 | static inline void pio_write_8(ioport8_t *port, uint8_t v) |
50 | { |
50 | { |
- | 51 | *port = v; |
|
- | 52 | } |
|
- | 53 | ||
- | 54 | static inline void pio_write_16(ioport16_t *port, uint16_t v) |
|
- | 55 | { |
|
51 | /* XXX */ |
56 | *port = v; |
- | 57 | } |
|
- | 58 | ||
- | 59 | static inline void pio_write_32(ioport32_t *port, uint32_t v) |
|
- | 60 | { |
|
- | 61 | *port = v; |
|
52 | } |
62 | } |
53 | 63 | ||
54 | static inline uint8_t pio_read_8(ioport8_t *port) |
64 | static inline uint8_t pio_read_8(ioport8_t *port) |
55 | { |
65 | { |
56 | return 0; /* XXX */ |
66 | return *port; |
- | 67 | } |
|
- | 68 | ||
- | 69 | static inline uint16_t pio_read_16(ioport16_t *port) |
|
- | 70 | { |
|
- | 71 | return *port; |
|
- | 72 | } |
|
- | 73 | ||
- | 74 | static inline uint32_t pio_read_32(ioport32_t *port) |
|
- | 75 | { |
|
- | 76 | return *port; |
|
57 | } |
77 | } |
58 | 78 | ||
59 | /** Return base address of current stack. |
79 | /** Return base address of current stack. |
60 | * |
80 | * |
61 | * Return the base address of the current stack. |
81 | * Return the base address of the current stack. |
62 | * The stack is assumed to be STACK_SIZE bytes long. |
82 | * The stack is assumed to be STACK_SIZE bytes long. |
63 | * The stack must start on page boundary. |
83 | * The stack must start on page boundary. |
64 | */ |
84 | */ |
65 | static inline uintptr_t get_stack_base(void) |
85 | static inline uintptr_t get_stack_base(void) |
66 | { |
86 | { |
67 | uintptr_t v; |
87 | uintptr_t v; |
68 | asm volatile ( |
88 | asm volatile ( |
69 | "and %0, sp, %1\n" |
89 | "and %0, sp, %1\n" |
70 | : "=r" (v) |
90 | : "=r" (v) |
71 | : "r" (~(STACK_SIZE - 1)) |
91 | : "r" (~(STACK_SIZE - 1)) |
72 | ); |
92 | ); |
73 | return v; |
93 | return v; |
74 | } |
94 | } |
75 | 95 | ||
76 | extern void cpu_halt(void); |
96 | extern void cpu_halt(void); |
77 | extern void asm_delay_loop(uint32_t t); |
97 | extern void asm_delay_loop(uint32_t t); |
78 | extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg, |
98 | extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg, |
79 | uintptr_t entry); |
99 | uintptr_t entry); |
80 | 100 | ||
81 | #endif |
101 | #endif |
82 | 102 | ||
83 | /** @} |
103 | /** @} |
84 | */ |
104 | */ |
85 | 105 |