/* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
|
/* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
|
|
|
This file is part of GCC.
|
This file is part of GCC.
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
GCC is free software; you can redistribute it and/or modify it under
|
the terms of the GNU General Public License as published by the Free
|
the terms of the GNU General Public License as published by the Free
|
Software Foundation; either version 3, or (at your option) any later
|
Software Foundation; either version 3, or (at your option) any later
|
version.
|
version.
|
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
for more details.
|
for more details.
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
Under Section 7 of GPL version 3, you are granted additional
|
permissions described in the GCC Runtime Library Exception, version
|
permissions described in the GCC Runtime Library Exception, version
|
3.1, as published by the Free Software Foundation.
|
3.1, as published by the Free Software Foundation.
|
|
|
You should have received a copy of the GNU General Public License and
|
You should have received a copy of the GNU General Public License and
|
a copy of the GCC Runtime Library Exception along with this program;
|
a copy of the GCC Runtime Library Exception along with this program;
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
<http://www.gnu.org/licenses/>. */
|
<http://www.gnu.org/licenses/>. */
|
|
|
#include <spu_mfcio.h>
|
#include <spu_mfcio.h>
|
extern vector unsigned int __mfc_tag_table;
|
extern vector unsigned int __mfc_tag_table;
|
|
|
/* Release the specified DMA tag from exclusive use. Once released, the
|
/* Release the specified DMA tag from exclusive use. Once released, the
|
tag is available for future reservation. Upon sucessful release,
|
tag is available for future reservation. Upon sucessful release,
|
MFC_DMA_TAG_VALID is returned. If the specified tag is not in the
|
MFC_DMA_TAG_VALID is returned. If the specified tag is not in the
|
range 0 to 31, or had not been reserved, no action is taken and
|
range 0 to 31, or had not been reserved, no action is taken and
|
MFC_DMA_TAG_INVALID is returned. */
|
MFC_DMA_TAG_INVALID is returned. */
|
|
|
unsigned int
|
unsigned int
|
__mfc_tag_release (unsigned int tag)
|
__mfc_tag_release (unsigned int tag)
|
{
|
{
|
vector unsigned int is_invalid;
|
vector unsigned int is_invalid;
|
vector unsigned int mask = (vector unsigned int)
|
vector unsigned int mask = (vector unsigned int)
|
{ 0x80000000, 0x80000000, 0x80000000, 0x80000000 };
|
{ 0x80000000, 0x80000000, 0x80000000, 0x80000000 };
|
vector signed int zero = (vector signed int) { 0, 0, 0, 0 };
|
vector signed int zero = (vector signed int) { 0, 0, 0, 0 };
|
|
|
vector signed int has_been_reserved;
|
vector signed int has_been_reserved;
|
|
|
/* Check if the tag is out of range. */
|
/* Check if the tag is out of range. */
|
is_invalid = spu_cmpgt (spu_promote (tag, 0), 31);
|
is_invalid = spu_cmpgt (spu_promote (tag, 0), 31);
|
|
|
/* Check whether the tag has been reserved, set to all 1 if has not
|
/* Check whether the tag has been reserved, set to all 1 if has not
|
been reserved, 0 otherwise. */
|
been reserved, 0 otherwise. */
|
has_been_reserved = (vector signed int) spu_rl (__mfc_tag_table, tag);
|
has_been_reserved = (vector signed int) spu_rl (__mfc_tag_table, tag);
|
has_been_reserved = (vector signed int) spu_cmpgt (zero, has_been_reserved);
|
has_been_reserved = (vector signed int) spu_cmpgt (zero, has_been_reserved);
|
|
|
/* Set invalid. */
|
/* Set invalid. */
|
is_invalid = spu_or ((vector unsigned int) has_been_reserved, is_invalid);
|
is_invalid = spu_or ((vector unsigned int) has_been_reserved, is_invalid);
|
|
|
mask = spu_rlmask (mask, (int)(-tag));
|
mask = spu_rlmask (mask, (int)(-tag));
|
__mfc_tag_table = spu_or (__mfc_tag_table, mask);
|
__mfc_tag_table = spu_or (__mfc_tag_table, mask);
|
|
|
return spu_extract(is_invalid, 0);
|
return spu_extract(is_invalid, 0);
|
}
|
}
|
|
|
|
|
