2 * File: include/asm-blackfin/cacheflush.h
3 * Based on: include/asm-m68knommu/cacheflush.h
4 * Author: LG Soft India
5 * Copyright (C) 2004 Analog Devices Inc.
6 * Created: Tue Sep 21 2004
7 * Description: Blackfin low-level cache routines adapted from the i386
8 * and PPC versions by Greg Ungerer (gerg@snapgear.com)
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; see the file COPYING.
26 * If not, write to the Free Software Foundation,
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #ifndef _BLACKFIN_CACHEFLUSH_H
31 #define _BLACKFIN_CACHEFLUSH_H
33 #include <asm/blackfin.h> /* for SSYNC() */
35 extern void blackfin_icache_flush_range(unsigned long start_address, unsigned long end_address);
36 extern void blackfin_dcache_flush_range(unsigned long start_address, unsigned long end_address);
37 extern void blackfin_dcache_invalidate_range(unsigned long start_address, unsigned long end_address);
38 extern void blackfin_dflush_page(void *page);
39 extern void blackfin_invalidate_entire_dcache(void);
41 #define flush_dcache_mmap_lock(mapping) do { } while (0)
42 #define flush_dcache_mmap_unlock(mapping) do { } while (0)
43 #define flush_cache_mm(mm) do { } while (0)
44 #define flush_cache_range(vma, start, end) do { } while (0)
45 #define flush_cache_page(vma, vmaddr) do { } while (0)
46 #define flush_cache_vmap(start, end) do { } while (0)
47 #define flush_cache_vunmap(start, end) do { } while (0)
50 #define flush_icache_range_others(start, end) \
51 smp_icache_flush_range_others((start), (end))
53 #define flush_icache_range_others(start, end) do { } while (0)
56 static inline void flush_icache_range(unsigned start, unsigned end)
58 #if defined(CONFIG_BFIN_WB)
59 blackfin_dcache_flush_range(start, end);
62 /* Make sure all write buffers in the data side of the core
63 * are flushed before trying to invalidate the icache. This
64 * needs to be after the data flush and before the icache
65 * flush so that the SSYNC does the right thing in preventing
66 * the instruction prefetcher from hitting things in cached
67 * memory at the wrong time -- it runs much further ahead than
71 #if defined(CONFIG_BFIN_ICACHE)
72 blackfin_icache_flush_range(start, end);
73 flush_icache_range_others(start, end);
77 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
78 do { memcpy(dst, src, len); \
79 flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
82 #define copy_from_user_page(vma, page, vaddr, dst, src, len) memcpy(dst, src, len)
84 #if defined(CONFIG_BFIN_DCACHE)
85 # define invalidate_dcache_range(start,end) blackfin_dcache_invalidate_range((start), (end))
87 # define invalidate_dcache_range(start,end) do { } while (0)
89 #if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_WB)
90 # define flush_dcache_range(start,end) blackfin_dcache_flush_range((start), (end))
91 # define flush_dcache_page(page) blackfin_dflush_page(page_address(page))
93 # define flush_dcache_range(start,end) do { } while (0)
94 # define flush_dcache_page(page) do { } while (0)
97 extern unsigned long reserved_mem_dcache_on;
98 extern unsigned long reserved_mem_icache_on;
100 static inline int bfin_addr_dcachable(unsigned long addr)
102 #ifdef CONFIG_BFIN_DCACHE
103 if (addr < (_ramend - DMA_UNCACHED_REGION))
107 if (reserved_mem_dcache_on &&
108 addr >= _ramend && addr < physical_mem_end)
111 #ifndef CONFIG_BFIN_L2_NOT_CACHED
112 if (addr >= L2_START && addr < L2_START + L2_LENGTH)
119 #endif /* _BLACKFIN_ICACHEFLUSH_H */