| /* |
| * 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 <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(struct spu_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); |
| } |
