64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
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/*
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* SPU local store allocation routines
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*
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* Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#undef DEBUG
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <asm/spu.h>
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#include <asm/spu_csa.h>
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#include <asm/mmu.h>
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#include "spufs.h"
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int spu_alloc_lscsa(struct spu_state *csa)
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{
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struct spu_lscsa *lscsa;
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unsigned char *p;
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lscsa = vzalloc(sizeof(struct spu_lscsa));
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if (!lscsa)
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return -ENOMEM;
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csa->lscsa = lscsa;
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/* Set LS pages reserved to allow for user-space mapping. */
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for (p = lscsa->ls; p < lscsa->ls + LS_SIZE; p += PAGE_SIZE)
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SetPageReserved(vmalloc_to_page(p));
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return 0;
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}
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void spu_free_lscsa(struct spu_state *csa)
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{
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/* Clear reserved bit before vfree. */
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unsigned char *p;
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if (csa->lscsa == NULL)
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return;
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for (p = csa->lscsa->ls; p < csa->lscsa->ls + LS_SIZE; p += PAGE_SIZE)
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ClearPageReserved(vmalloc_to_page(p));
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vfree(csa->lscsa);
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}
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