2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #ifndef __ARC_ASM_CACHE_H
10 #define __ARC_ASM_CACHE_H
12 #include <asm/mmu.h> /* some of cache registers depend on MMU ver */
14 /* In case $$ not config, setup a dummy number for rest of kernel */
15 #ifndef CONFIG_ARC_CACHE_LINE_SHIFT
16 #define L1_CACHE_SHIFT 6
18 #define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT
21 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
23 #define ARC_ICACHE_WAYS 2
24 #define ARC_DCACHE_WAYS 4
27 #define ARC_ICACHE_LINE_LEN L1_CACHE_BYTES
28 #define ARC_DCACHE_LINE_LEN L1_CACHE_BYTES
30 #define ICACHE_LINE_MASK (~(ARC_ICACHE_LINE_LEN - 1))
31 #define DCACHE_LINE_MASK (~(ARC_DCACHE_LINE_LEN - 1))
33 #if ARC_ICACHE_LINE_LEN != ARC_DCACHE_LINE_LEN
34 #error "Need to fix some code as I/D cache lines not same"
36 #define is_not_cache_aligned(p) ((unsigned long)p & (~DCACHE_LINE_MASK))
41 /* Uncached access macros */
42 #define arc_read_uncached_32(ptr) \
45 __asm__ __volatile__( \
46 " ld.di %0, [%1] \n" \
52 #define arc_write_uncached_32(ptr, data)\
54 __asm__ __volatile__( \
55 " st.di %0, [%1] \n" \
57 : "r"(data), "r"(ptr)); \
60 #define ARCH_DMA_MINALIGN L1_CACHE_BYTES
63 * ARC700 doesn't cache any access in top 256M.
64 * Ideal for wiring memory mapped peripherals as we don't need to do
65 * explicit uncached accesses (LD.di/ST.di) hence more portable drivers
67 #define ARC_UNCACHED_ADDR_SPACE 0xc0000000
69 extern void arc_cache_init(void);
70 extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len);
71 extern void __init read_decode_cache_bcr(void);
74 #endif /* _ASM_CACHE_H */