| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
|---|---|
| 2 | /* |
| 3 | * SPU local store allocation routines |
| 4 | * |
| 5 | * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. |
| 6 | */ |
| 7 | |
| 8 | #undef DEBUG |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/mm.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/vmalloc.h> |
| 14 | |
| 15 | #include <asm/spu.h> |
| 16 | #include <asm/spu_csa.h> |
| 17 | #include <asm/mmu.h> |
| 18 | |
| 19 | #include "spufs.h" |
| 20 | |
| 21 | int spu_alloc_lscsa(struct spu_state *csa) |
| 22 | { |
| 23 | struct spu_lscsa *lscsa; |
| 24 | unsigned char *p; |
| 25 | |
| 26 | lscsa = vzalloc(sizeof(*lscsa)); |
| 27 | if (!lscsa) |
| 28 | return -ENOMEM; |
| 29 | csa->lscsa = lscsa; |
| 30 | |
| 31 | /* Set LS pages reserved to allow for user-space mapping. */ |
| 32 | for (p = lscsa->ls; p < lscsa->ls + LS_SIZE; p += PAGE_SIZE) |
| 33 | SetPageReserved(vmalloc_to_page(addr: p)); |
| 34 | |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | void spu_free_lscsa(struct spu_state *csa) |
| 39 | { |
| 40 | /* Clear reserved bit before vfree. */ |
| 41 | unsigned char *p; |
| 42 | |
| 43 | if (csa->lscsa == NULL) |
| 44 | return; |
| 45 | |
| 46 | for (p = csa->lscsa->ls; p < csa->lscsa->ls + LS_SIZE; p += PAGE_SIZE) |
| 47 | ClearPageReserved(page: vmalloc_to_page(addr: p)); |
| 48 | |
| 49 | vfree(addr: csa->lscsa); |
| 50 | } |
| 51 |