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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 <typedefs.h> |
39 | #include <typedefs.h> |
40 | #include <arch/types.h> |
40 | #include <arch/types.h> |
41 | #include <arch/stack.h> |
41 | #include <arch/stack.h> |
42 | #include <config.h> |
42 | #include <config.h> |
43 | #include <arch/interrupt.h> |
43 | #include <arch/interrupt.h> |
44 | 44 | ||
45 | /** No such instruction on ARM to sleep CPU. */ |
45 | /** No such instruction on ARM to sleep CPU. */ |
46 | static inline void cpu_sleep(void) |
46 | static inline void cpu_sleep(void) |
47 | { |
47 | { |
48 | } |
48 | } |
49 | 49 | ||
50 | static inline void pio_write_8(ioport8_t *port, uint8_t v) |
50 | static inline void pio_write_8(ioport8_t *port, uint8_t v) |
51 | { |
51 | { |
52 | *port = v; |
52 | *port = v; |
53 | } |
53 | } |
54 | 54 | ||
55 | static inline void pio_write_16(ioport16_t *port, uint16_t v) |
55 | static inline void pio_write_16(ioport16_t *port, uint16_t v) |
56 | { |
56 | { |
57 | *port = v; |
57 | *port = v; |
58 | } |
58 | } |
59 | 59 | ||
60 | static inline void pio_write_32(ioport32_t *port, uint32_t v) |
60 | static inline void pio_write_32(ioport32_t *port, uint32_t v) |
61 | { |
61 | { |
62 | *port = v; |
62 | *port = v; |
63 | } |
63 | } |
64 | 64 | ||
65 | static inline uint8_t pio_read_8(ioport8_t *port) |
65 | static inline uint8_t pio_read_8(ioport8_t *port) |
66 | { |
66 | { |
67 | return *port; |
67 | return *port; |
68 | } |
68 | } |
69 | 69 | ||
70 | static inline uint16_t pio_read_16(ioport16_t *port) |
70 | static inline uint16_t pio_read_16(ioport16_t *port) |
71 | { |
71 | { |
72 | return *port; |
72 | return *port; |
73 | } |
73 | } |
74 | 74 | ||
75 | static inline uint32_t pio_read_32(ioport32_t *port) |
75 | static inline uint32_t pio_read_32(ioport32_t *port) |
76 | { |
76 | { |
77 | return *port; |
77 | return *port; |
78 | } |
78 | } |
79 | 79 | ||
80 | /** Return base address of current stack. |
80 | /** Return base address of current stack. |
81 | * |
81 | * |
82 | * Return the base address of the current stack. |
82 | * Return the base address of the current stack. |
83 | * The stack is assumed to be STACK_SIZE bytes long. |
83 | * The stack is assumed to be STACK_SIZE bytes long. |
84 | * The stack must start on page boundary. |
84 | * The stack must start on page boundary. |
85 | * |
85 | * |
86 | */ |
86 | */ |
87 | static inline uintptr_t get_stack_base(void) |
87 | static inline uintptr_t get_stack_base(void) |
88 | { |
88 | { |
89 | uintptr_t v; |
89 | uintptr_t v; |
90 | asm volatile ( |
90 | asm volatile ( |
91 | "and %[v], sp, %[size]\n" |
91 | "and %[v], sp, %[size]\n" |
92 | : [v] "=r" (v) |
92 | : [v] "=r" (v) |
93 | : [size] "r" (~(STACK_SIZE - 1)) |
93 | : [size] "r" (~(STACK_SIZE - 1)) |
94 | ); |
94 | ); |
95 | return v; |
95 | return v; |
96 | } |
96 | } |
97 | 97 | ||
98 | extern void cpu_halt(void); |
98 | extern void cpu_halt(void); |
99 | extern void asm_delay_loop(uint32_t t); |
99 | extern void asm_delay_loop(uint32_t t); |
100 | extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg, |
100 | extern void userspace_asm(uintptr_t ustack, uintptr_t uspace_uarg, |
101 | uintptr_t entry); |
101 | uintptr_t entry); |
102 | 102 | ||
103 | #endif |
103 | #endif |
104 | 104 | ||
105 | /** @} |
105 | /** @} |
106 | */ |
106 | */ |
107 | 107 |