1 | /* |
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2 | * Copyright (c) 2015 Hesham Almatary <hesham@alumni.york.ac.uk> |
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3 | * |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that the following conditions |
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6 | * are met: |
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7 | * 1. Redistributions of source code must retain the above copyright |
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8 | * notice, this list of conditions and the following disclaimer. |
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9 | * 2. Redistributions in binary form must reproduce the above copyright |
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10 | * notice, this list of conditions and the following disclaimer in the |
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11 | * documentation and/or other materials provided with the distribution. |
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12 | * |
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13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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14 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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16 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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17 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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18 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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19 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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20 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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21 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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22 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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23 | * SUCH DAMAGE. |
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24 | */ |
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25 | |
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26 | #ifdef HAVE_CONFIG_H |
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27 | #include "config.h" |
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28 | #endif |
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29 | |
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30 | #include <rtems/asm.h> |
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31 | |
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32 | .section .text |
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33 | |
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34 | PUBLIC(_CPU_Context_volatile_clobber) |
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35 | SYM(_CPU_Context_volatile_clobber): |
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36 | |
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37 | .macro clobber_register reg |
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38 | addi t0, t0, -1 |
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39 | mv \reg, t0 |
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40 | .endm |
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41 | |
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42 | clobber_register a0 |
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43 | clobber_register a1 |
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44 | clobber_register a2 |
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45 | clobber_register a3 |
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46 | clobber_register a4 |
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47 | clobber_register a5 |
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48 | clobber_register a6 |
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49 | |
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50 | ret |
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