/* * SPU local store allocation routines * * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. * * This program 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 Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #undef DEBUG #include #include #include #include #include #include #include #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); }