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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Pavel Jancik |
2 | * Copyright (c) 2007 Pavel Jancik |
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 Syscall routine. |
33 | * @brief Syscall routine. |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #include <libc.h> |
36 | #include <libc.h> |
37 | 37 | ||
38 | 38 | ||
39 | /** Syscall routine. |
39 | /** Syscall routine. |
40 | * |
40 | * |
41 | * Stores p1-p4, id to r0-r4 registers and calls <code>swi</code> |
41 | * Stores p1-p4, id to r0-r4 registers and calls <code>swi</code> |
42 | * instruction. Returned value is read from r0 register. |
42 | * instruction. Returned value is read from r0 register. |
43 | * |
43 | * |
44 | * @param p1 Parameter 1. |
44 | * @param p1 Parameter 1. |
45 | * @param p2 Parameter 2. |
45 | * @param p2 Parameter 2. |
46 | * @param p3 Parameter 3. |
46 | * @param p3 Parameter 3. |
47 | * @param p4 Parameter 4. |
47 | * @param p4 Parameter 4. |
48 | * @param id Number of syscall. |
48 | * @param id Number of syscall. |
49 | * |
49 | * |
50 | * @return Syscall return value. |
50 | * @return Syscall return value. |
51 | */ |
51 | */ |
52 | sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3, |
52 | sysarg_t __syscall(const sysarg_t p1, const sysarg_t p2, const sysarg_t p3, |
53 | const sysarg_t p4, const sysarg_t p5, const sysarg_t p6, const syscall_t id) |
53 | const sysarg_t p4, const sysarg_t p5, const sysarg_t p6, const syscall_t id) |
54 | { |
54 | { |
55 | register sysarg_t __arm_reg_r0 asm("r0") = p1; |
55 | register sysarg_t __arm_reg_r0 asm("r0") = p1; |
56 | register sysarg_t __arm_reg_r1 asm("r1") = p2; |
56 | register sysarg_t __arm_reg_r1 asm("r1") = p2; |
57 | register sysarg_t __arm_reg_r2 asm("r2") = p3; |
57 | register sysarg_t __arm_reg_r2 asm("r2") = p3; |
58 | register sysarg_t __arm_reg_r3 asm("r3") = p4; |
58 | register sysarg_t __arm_reg_r3 asm("r3") = p4; |
59 | register sysarg_t __arm_reg_r4 asm("r4") = p5; |
59 | register sysarg_t __arm_reg_r4 asm("r4") = p5; |
60 | register sysarg_t __arm_reg_r5 asm("r5") = p6; |
60 | register sysarg_t __arm_reg_r5 asm("r5") = p6; |
61 | register sysarg_t __arm_reg_r6 asm("r6") = id; |
61 | register sysarg_t __arm_reg_r6 asm("r6") = id; |
62 | 62 | ||
63 | asm volatile ( "swi" |
63 | asm volatile ( "swi" |
64 | : "=r" (__arm_reg_r0) |
64 | : "=r" (__arm_reg_r0) |
65 | : "r" (__arm_reg_r0), |
65 | : "r" (__arm_reg_r0), |
66 | "r" (__arm_reg_r1), |
66 | "r" (__arm_reg_r1), |
67 | "r" (__arm_reg_r2), |
67 | "r" (__arm_reg_r2), |
68 | "r" (__arm_reg_r3), |
68 | "r" (__arm_reg_r3), |
69 | "r" (__arm_reg_r4), |
69 | "r" (__arm_reg_r4), |
70 | "r" (__arm_reg_r5), |
70 | "r" (__arm_reg_r5), |
71 | "r" (__arm_reg_r6) |
71 | "r" (__arm_reg_r6) |
72 | ); |
72 | ); |
73 | 73 | ||
74 | return __arm_reg_r0; |
74 | return __arm_reg_r0; |
75 | } |
75 | } |
76 | 76 | ||
77 | /** @} |
77 | /** @} |
78 | */ |
78 | */ |
79 | 79 |