4.115
Last change
on this file since 88dcb841 was
88dcb841,
checked in by Sebastian Huber <sebastian.huber@…>, on 06/07/11 at 13:58:23
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2011-06-07 Sebastian Huber <sebastian.huber@…>
- new-exceptions/bspsupport/ppc_exc_alignment.c: New file.
- Makefile.am: Reflect change above.
- new-exceptions/bspsupport/vectors.h: Declare
ppc_exc_alignment_handler().
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-
Property mode set to
100644
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File size:
1.1 KB
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1 | /* |
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2 | * Copyright (c) 2011 embedded brains GmbH. All rights reserved. |
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3 | * |
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4 | * embedded brains GmbH |
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5 | * Obere Lagerstr. 30 |
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6 | * 82178 Puchheim |
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7 | * Germany |
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8 | * <rtems@embedded-brains.de> |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.com/license/LICENSE. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #include <rtems.h> |
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18 | #include <bsp/vectors.h> |
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19 | |
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20 | int ppc_exc_alignment_handler(BSP_Exception_frame *frame, unsigned excNum) |
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21 | { |
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22 | unsigned opcode = *(unsigned *) frame->EXC_SRR0; |
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23 | |
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24 | /* Do we have a dcbz instruction? */ |
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25 | if ((opcode & 0xffe007ff) == 0x7c0007ec) { |
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26 | unsigned clsz = (unsigned) rtems_cache_get_data_line_size(); |
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27 | unsigned a = (opcode >> 16) & 0x1f; |
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28 | unsigned b = (opcode >> 11) & 0x1f; |
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29 | unsigned *regs = &frame->GPR0; |
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30 | unsigned *current = (unsigned *) |
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31 | (((a == 0 ? 0 : regs [a]) + regs [b]) & (clsz - 1)); |
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32 | unsigned *end = current + clsz / 4; |
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33 | |
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34 | while (current != end) { |
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35 | *current = 0; |
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36 | ++current; |
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37 | } |
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38 | |
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39 | frame->EXC_SRR0 += 4; |
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40 | |
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41 | return 0; |
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42 | } else { |
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43 | return -1; |
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44 | } |
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45 | } |
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