Richard Kuo | 2d3cbc7 | 2011-10-31 18:50:51 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Cache management functions for Hexagon |
| 3 | * |
Richard Kuo | e1858b2 | 2012-09-19 16:22:02 -0500 | [diff] [blame] | 4 | * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
Richard Kuo | 2d3cbc7 | 2011-10-31 18:50:51 -0500 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 and |
| 8 | * only version 2 as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 18 | * 02110-1301, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/mm.h> |
| 22 | #include <asm/cacheflush.h> |
| 23 | #include <asm/hexagon_vm.h> |
| 24 | |
| 25 | #define spanlines(start, end) \ |
| 26 | (((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1) |
| 27 | |
| 28 | void flush_dcache_range(unsigned long start, unsigned long end) |
| 29 | { |
| 30 | unsigned long lines = spanlines(start, end-1); |
| 31 | unsigned long i, flags; |
| 32 | |
| 33 | start &= ~(LINESIZE - 1); |
| 34 | |
| 35 | local_irq_save(flags); |
| 36 | |
| 37 | for (i = 0; i < lines; i++) { |
| 38 | __asm__ __volatile__ ( |
| 39 | " dccleaninva(%0); " |
| 40 | : |
| 41 | : "r" (start) |
| 42 | ); |
| 43 | start += LINESIZE; |
| 44 | } |
| 45 | local_irq_restore(flags); |
| 46 | } |
| 47 | |
| 48 | void flush_icache_range(unsigned long start, unsigned long end) |
| 49 | { |
| 50 | unsigned long lines = spanlines(start, end-1); |
| 51 | unsigned long i, flags; |
| 52 | |
| 53 | start &= ~(LINESIZE - 1); |
| 54 | |
| 55 | local_irq_save(flags); |
| 56 | |
| 57 | for (i = 0; i < lines; i++) { |
| 58 | __asm__ __volatile__ ( |
| 59 | " dccleana(%0); " |
| 60 | " icinva(%0); " |
| 61 | : |
| 62 | : "r" (start) |
| 63 | ); |
| 64 | start += LINESIZE; |
| 65 | } |
| 66 | __asm__ __volatile__ ( |
| 67 | "isync" |
| 68 | ); |
| 69 | local_irq_restore(flags); |
| 70 | } |
Pranith Kumar | e356030 | 2014-08-29 15:19:09 -0700 | [diff] [blame] | 71 | EXPORT_SYMBOL(flush_icache_range); |
Richard Kuo | 2d3cbc7 | 2011-10-31 18:50:51 -0500 | [diff] [blame] | 72 | |
| 73 | void hexagon_clean_dcache_range(unsigned long start, unsigned long end) |
| 74 | { |
| 75 | unsigned long lines = spanlines(start, end-1); |
| 76 | unsigned long i, flags; |
| 77 | |
| 78 | start &= ~(LINESIZE - 1); |
| 79 | |
| 80 | local_irq_save(flags); |
| 81 | |
| 82 | for (i = 0; i < lines; i++) { |
| 83 | __asm__ __volatile__ ( |
| 84 | " dccleana(%0); " |
| 85 | : |
| 86 | : "r" (start) |
| 87 | ); |
| 88 | start += LINESIZE; |
| 89 | } |
| 90 | local_irq_restore(flags); |
| 91 | } |
| 92 | |
| 93 | void hexagon_inv_dcache_range(unsigned long start, unsigned long end) |
| 94 | { |
| 95 | unsigned long lines = spanlines(start, end-1); |
| 96 | unsigned long i, flags; |
| 97 | |
| 98 | start &= ~(LINESIZE - 1); |
| 99 | |
| 100 | local_irq_save(flags); |
| 101 | |
| 102 | for (i = 0; i < lines; i++) { |
| 103 | __asm__ __volatile__ ( |
| 104 | " dcinva(%0); " |
| 105 | : |
| 106 | : "r" (start) |
| 107 | ); |
| 108 | start += LINESIZE; |
| 109 | } |
| 110 | local_irq_restore(flags); |
| 111 | } |
| 112 | |
| 113 | |
| 114 | |
| 115 | |
| 116 | /* |
| 117 | * This is just really brutal and shouldn't be used anyways, |
| 118 | * especially on V2. Left here just in case. |
| 119 | */ |
| 120 | void flush_cache_all_hexagon(void) |
| 121 | { |
| 122 | unsigned long flags; |
| 123 | local_irq_save(flags); |
| 124 | __vmcache_ickill(); |
| 125 | __vmcache_dckill(); |
| 126 | __vmcache_l2kill(); |
| 127 | local_irq_restore(flags); |
| 128 | mb(); |
| 129 | } |
Guenter Roeck | cb84c2b | 2014-12-09 14:21:45 -0800 | [diff] [blame] | 130 | |
| 131 | void copy_to_user_page(struct vm_area_struct *vma, struct page *page, |
| 132 | unsigned long vaddr, void *dst, void *src, int len) |
| 133 | { |
| 134 | memcpy(dst, src, len); |
| 135 | if (vma->vm_flags & VM_EXEC) { |
| 136 | flush_icache_range((unsigned long) dst, |
| 137 | (unsigned long) dst + len); |
| 138 | } |
| 139 | } |