Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * arch/sh/mm/cache-sh3.c | |
3 | * | |
4 | * Copyright (C) 1999, 2000 Niibe Yutaka | |
5 | * Copyright (C) 2002 Paul Mundt | |
6 | * | |
7 | * Released under the terms of the GNU GPL v2.0. | |
8 | */ | |
9 | ||
10 | #include <linux/init.h> | |
11 | #include <linux/mman.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/threads.h> | |
14 | #include <asm/addrspace.h> | |
15 | #include <asm/page.h> | |
16 | #include <asm/pgtable.h> | |
17 | #include <asm/processor.h> | |
18 | #include <asm/cache.h> | |
19 | #include <asm/io.h> | |
20 | #include <asm/uaccess.h> | |
21 | #include <asm/pgalloc.h> | |
22 | #include <asm/mmu_context.h> | |
23 | #include <asm/cacheflush.h> | |
24 | ||
25 | /* | |
26 | * Write back the dirty D-caches, but not invalidate them. | |
27 | * | |
28 | * Is this really worth it, or should we just alias this routine | |
29 | * to __flush_purge_region too? | |
30 | * | |
31 | * START: Virtual Address (U0, P1, or P3) | |
32 | * SIZE: Size of the region. | |
33 | */ | |
34 | ||
79f1c9da | 35 | static void sh3__flush_wback_region(void *start, int size) |
1da177e4 LT |
36 | { |
37 | unsigned long v, j; | |
38 | unsigned long begin, end; | |
39 | unsigned long flags; | |
40 | ||
41 | begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); | |
42 | end = ((unsigned long)start + size + L1_CACHE_BYTES-1) | |
43 | & ~(L1_CACHE_BYTES-1); | |
44 | ||
45 | for (v = begin; v < end; v+=L1_CACHE_BYTES) { | |
46 | unsigned long addrstart = CACHE_OC_ADDRESS_ARRAY; | |
11c19656 | 47 | for (j = 0; j < current_cpu_data.dcache.ways; j++) { |
1da177e4 LT |
48 | unsigned long data, addr, p; |
49 | ||
50 | p = __pa(v); | |
11c19656 | 51 | addr = addrstart | (v & current_cpu_data.dcache.entry_mask); |
1da177e4 | 52 | local_irq_save(flags); |
9d56dd3b | 53 | data = __raw_readl(addr); |
1da177e4 LT |
54 | |
55 | if ((data & CACHE_PHYSADDR_MASK) == | |
56 | (p & CACHE_PHYSADDR_MASK)) { | |
57 | data &= ~SH_CACHE_UPDATED; | |
9d56dd3b | 58 | __raw_writel(data, addr); |
1da177e4 LT |
59 | local_irq_restore(flags); |
60 | break; | |
61 | } | |
62 | local_irq_restore(flags); | |
11c19656 | 63 | addrstart += current_cpu_data.dcache.way_incr; |
1da177e4 LT |
64 | } |
65 | } | |
66 | } | |
67 | ||
68 | /* | |
69 | * Write back the dirty D-caches and invalidate them. | |
70 | * | |
71 | * START: Virtual Address (U0, P1, or P3) | |
72 | * SIZE: Size of the region. | |
73 | */ | |
79f1c9da | 74 | static void sh3__flush_purge_region(void *start, int size) |
1da177e4 LT |
75 | { |
76 | unsigned long v; | |
77 | unsigned long begin, end; | |
78 | ||
79 | begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); | |
80 | end = ((unsigned long)start + size + L1_CACHE_BYTES-1) | |
81 | & ~(L1_CACHE_BYTES-1); | |
82 | ||
83 | for (v = begin; v < end; v+=L1_CACHE_BYTES) { | |
84 | unsigned long data, addr; | |
85 | ||
86 | data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */ | |
87 | addr = CACHE_OC_ADDRESS_ARRAY | | |
11c19656 | 88 | (v & current_cpu_data.dcache.entry_mask) | SH_CACHE_ASSOC; |
9d56dd3b | 89 | __raw_writel(data, addr); |
1da177e4 LT |
90 | } |
91 | } | |
92 | ||
79f1c9da PM |
93 | void __init sh3_cache_init(void) |
94 | { | |
95 | __flush_wback_region = sh3__flush_wback_region; | |
96 | __flush_purge_region = sh3__flush_purge_region; | |
97 | ||
98 | /* | |
99 | * No write back please | |
100 | * | |
101 | * Except I don't think there's any way to avoid the writeback. | |
102 | * So we just alias it to sh3__flush_purge_region(). dwmw2. | |
103 | */ | |
104 | __flush_invalidate_region = sh3__flush_purge_region; | |
105 | } |