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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SPU local store allocation routines
*
* Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
*/
#undef DEBUG
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <asm/spu.h>
#include <asm/spu_csa.h>
#include <asm/mmu.h>
#include "spufs.h"
int spu_alloc_lscsa(struct spu_state *csa)
{
struct spu_lscsa *lscsa;
unsigned char *p;
lscsa = vzalloc(sizeof(*lscsa));
if (!lscsa)
return -ENOMEM;
csa->lscsa = lscsa;
/* Set LS pages reserved to allow for user-space mapping. */
for (p = lscsa->ls; p < lscsa->ls + LS_SIZE; p += PAGE_SIZE)
SetPageReserved(vmalloc_to_page(p));
return 0;
}
void spu_free_lscsa(struct spu_state *csa)
{
/* Clear reserved bit before vfree. */
unsigned char *p;
if (csa->lscsa == NULL)
return;
for (p = csa->lscsa->ls; p < csa->lscsa->ls + LS_SIZE; p += PAGE_SIZE)
ClearPageReserved(vmalloc_to_page(p));
vfree(csa->lscsa);
}
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