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 |