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/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ARC_ASM_CACHE_H
#define __ARC_ASM_CACHE_H
/* In case $$ not config, setup a dummy number for rest of kernel */
#ifndef CONFIG_ARC_CACHE_LINE_SHIFT
#define L1_CACHE_SHIFT 6
#else
#define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT
#endif
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
/* For a rare case where customers have differently config I/D */
#define ARC_ICACHE_LINE_LEN L1_CACHE_BYTES
#define ARC_DCACHE_LINE_LEN L1_CACHE_BYTES
#define ICACHE_LINE_MASK (~(ARC_ICACHE_LINE_LEN - 1))
#define DCACHE_LINE_MASK (~(ARC_DCACHE_LINE_LEN - 1))
/*
* ARC700 doesn't cache any access in top 256M.
* Ideal for wiring memory mapped peripherals as we don't need to do
* explicit uncached accesses (LD.di/ST.di) hence more portable drivers
*/
#define ARC_UNCACHED_ADDR_SPACE 0xc0000000
#ifndef __ASSEMBLY__
/* Uncached access macros */
#define arc_read_uncached_32(ptr) \
({ \
unsigned int __ret; \
__asm__ __volatile__( \
" ld.di %0, [%1] \n" \
: "=r"(__ret) \
: "r"(ptr)); \
__ret; \
})
#define arc_write_uncached_32(ptr, data)\
({ \
__asm__ __volatile__( \
" st.di %0, [%1] \n" \
: \
: "r"(data), "r"(ptr)); \
})
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
extern void arc_cache_init(void);
extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len);
extern void __init read_decode_cache_bcr(void);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_CACHE_H */