Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/sh/mm/cache-sh2.c |
| 3 | * |
| 4 | * Copyright (C) 2002 Paul Mundt |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 5 | * Copyright (C) 2008 Yoshinori Sato |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * |
| 7 | * Released under the terms of the GNU GPL v2.0. |
| 8 | */ |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 9 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/init.h> |
| 11 | #include <linux/mm.h> |
| 12 | |
| 13 | #include <asm/cache.h> |
| 14 | #include <asm/addrspace.h> |
| 15 | #include <asm/processor.h> |
| 16 | #include <asm/cacheflush.h> |
| 17 | #include <asm/io.h> |
| 18 | |
Paul Mundt | 109b44a | 2009-08-15 12:35:15 +0900 | [diff] [blame] | 19 | static void sh2__flush_wback_region(void *start, int size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | { |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 21 | unsigned long v; |
| 22 | unsigned long begin, end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 24 | begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); |
| 25 | end = ((unsigned long)start + size + L1_CACHE_BYTES-1) |
| 26 | & ~(L1_CACHE_BYTES-1); |
| 27 | for (v = begin; v < end; v+=L1_CACHE_BYTES) { |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 28 | unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0); |
| 29 | int way; |
| 30 | for (way = 0; way < 4; way++) { |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame^] | 31 | unsigned long data = __raw_readl(addr | (way << 12)); |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 32 | if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) { |
| 33 | data &= ~SH_CACHE_UPDATED; |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame^] | 34 | __raw_writel(data, addr | (way << 12)); |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 35 | } |
| 36 | } |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 37 | } |
| 38 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Paul Mundt | 109b44a | 2009-08-15 12:35:15 +0900 | [diff] [blame] | 40 | static void sh2__flush_purge_region(void *start, int size) |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 41 | { |
| 42 | unsigned long v; |
| 43 | unsigned long begin, end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 45 | begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); |
| 46 | end = ((unsigned long)start + size + L1_CACHE_BYTES-1) |
| 47 | & ~(L1_CACHE_BYTES-1); |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 48 | |
| 49 | for (v = begin; v < end; v+=L1_CACHE_BYTES) |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame^] | 50 | __raw_writel((v & CACHE_PHYSADDR_MASK), |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 51 | CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 52 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Paul Mundt | 109b44a | 2009-08-15 12:35:15 +0900 | [diff] [blame] | 54 | static void sh2__flush_invalidate_region(void *start, int size) |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 55 | { |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 56 | #ifdef CONFIG_CACHE_WRITEBACK |
| 57 | /* |
| 58 | * SH-2 does not support individual line invalidation, only a |
| 59 | * global invalidate. |
| 60 | */ |
| 61 | unsigned long ccr; |
| 62 | unsigned long flags; |
| 63 | local_irq_save(flags); |
| 64 | jump_to_uncached(); |
| 65 | |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame^] | 66 | ccr = __raw_readl(CCR); |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 67 | ccr |= CCR_CACHE_INVALIDATE; |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame^] | 68 | __raw_writel(ccr, CCR); |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 69 | |
| 70 | back_to_cached(); |
| 71 | local_irq_restore(flags); |
| 72 | #else |
Yoshinori Sato | 9d4436a | 2006-11-05 15:40:13 +0900 | [diff] [blame] | 73 | unsigned long v; |
| 74 | unsigned long begin, end; |
| 75 | |
| 76 | begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); |
| 77 | end = ((unsigned long)start + size + L1_CACHE_BYTES-1) |
| 78 | & ~(L1_CACHE_BYTES-1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 80 | for (v = begin; v < end; v+=L1_CACHE_BYTES) |
Paul Mundt | 9d56dd3 | 2010-01-26 12:58:40 +0900 | [diff] [blame^] | 81 | __raw_writel((v & CACHE_PHYSADDR_MASK), |
Yoshinori Sato | cce2d45 | 2008-08-04 16:33:47 +0900 | [diff] [blame] | 82 | CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); |
| 83 | #endif |
| 84 | } |
Paul Mundt | 109b44a | 2009-08-15 12:35:15 +0900 | [diff] [blame] | 85 | |
| 86 | void __init sh2_cache_init(void) |
| 87 | { |
| 88 | __flush_wback_region = sh2__flush_wback_region; |
| 89 | __flush_purge_region = sh2__flush_purge_region; |
| 90 | __flush_invalidate_region = sh2__flush_invalidate_region; |
| 91 | } |