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| Rev | Author | Line No. | Line |
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| 908 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <libc.h> |
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| 30 | |||
| 917 | jermar | 31 | /** |
| 32 | * Immediate operand for break instruction. |
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| 33 | * Be carefull about the value as Ski simulator |
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| 34 | * is somewhat sensitive to its value. |
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| 35 | * |
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| 36 | * 0 will be confused with Ski breakpoint. |
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| 37 | * And higher values will be confused with SSC's. |
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| 38 | */ |
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| 39 | #define SYSCALL_IMM 1 |
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| 40 | |||
| 908 | jermar | 41 | sysarg_t __syscall(const syscall_t id, const sysarg_t p1, const sysarg_t p2, const sysarg_t p3) |
| 42 | { |
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| 43 | sysarg_t ret; |
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| 44 | |||
| 45 | __asm__ volatile ( |
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| 46 | "mov r14 = %1\n" |
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| 47 | "mov r15 = %2\n" |
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| 48 | "mov r16 = %3\n" |
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| 49 | "mov r17 = %4\n" |
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| 917 | jermar | 50 | "break %5\n" |
| 908 | jermar | 51 | "mov %0 = r8\n" |
| 52 | : "=r" (ret) |
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| 917 | jermar | 53 | : "r" (id), "r" (p1), "r" (p2), "r" (p3), "i" (SYSCALL_IMM) |
| 908 | jermar | 54 | : "r8", "r14", "r15", "r16" |
| 55 | ); |
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| 56 | |||
| 57 | return ret; |
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| 58 | } |