51 lines
982 B
C
51 lines
982 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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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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#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(*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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