4.115
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1 | /* Driver Manager Read/Write Interface Implementation. |
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2 | * |
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3 | * COPYRIGHT (c) 2009 Cobham Gaisler AB. |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.org/license/LICENSE. |
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8 | */ |
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9 | |
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10 | #include <string.h> |
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11 | #include <drvmgr/drvmgr.h> |
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12 | |
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13 | /* Set a range of memory in 128 byte chunks. |
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14 | * This call will take 128 bytes for buffer on stack |
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15 | */ |
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16 | void drvmgr_rw_memset( |
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17 | void *dstadr, |
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18 | int c, |
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19 | size_t n, |
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20 | void *a, |
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21 | drvmgr_wmem_arg wmem |
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22 | ) |
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23 | { |
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24 | unsigned long long buf[16+1]; /* Extra bytes after data are reserved |
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25 | * for optimizations by write_mem */ |
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26 | int txlen; |
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27 | char *adr; |
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28 | |
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29 | if (n <= 0) |
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30 | return; |
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31 | |
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32 | if (n > sizeof(unsigned long long)*16) |
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33 | txlen = sizeof(unsigned long long)*16; |
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34 | else |
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35 | txlen = n; |
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36 | |
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37 | memset(buf, c, txlen); |
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38 | |
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39 | adr = dstadr; |
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40 | do { |
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41 | wmem(adr, (const void *)&buf[0], txlen, a); |
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42 | adr += txlen; |
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43 | n -= txlen; |
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44 | |
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45 | /* next length to transmitt */ |
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46 | if (n > 16*sizeof(unsigned long long)) |
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47 | txlen = 16*sizeof(unsigned long long); |
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48 | else |
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49 | txlen = n; |
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50 | } while (n > 0); |
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51 | } |
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