forked from Imagelibrary/rtems
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* Driver Manager Read/Write Interface Implementation.
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*
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* COPYRIGHT (c) 2009 Cobham Gaisler AB.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <string.h>
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#include <drvmgr/drvmgr.h>
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/* Set a range of memory in 128 byte chunks.
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* This call will take 128 bytes for buffer on stack
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*/
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void drvmgr_rw_memset(
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void *dstadr,
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int c,
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size_t n,
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void *a,
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drvmgr_wmem_arg wmem
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)
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{
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unsigned long long buf[16+1]; /* Extra bytes after data are reserved
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* for optimizations by write_mem */
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int txlen;
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char *adr;
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if (n <= 0)
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return;
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if (n > sizeof(unsigned long long)*16)
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txlen = sizeof(unsigned long long)*16;
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else
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txlen = n;
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memset(buf, c, txlen);
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adr = dstadr;
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do {
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wmem(adr, (const void *)&buf[0], txlen, a);
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adr += txlen;
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n -= txlen;
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/* next length to transmitt */
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if (n > 16*sizeof(unsigned long long))
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txlen = 16*sizeof(unsigned long long);
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else
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txlen = n;
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} while (n > 0);
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}
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