1 /* 2 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 3 * 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. 7 */ 8 9 #ifndef __ARC_ASM_CACHE_H 10 #define __ARC_ASM_CACHE_H 11 12 /* In case $$ not config, setup a dummy number for rest of kernel */ 13 #ifndef CONFIG_ARC_CACHE_LINE_SHIFT 14 #define L1_CACHE_SHIFT 6 15 #else 16 #define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT 17 #endif 18 19 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) 20 #define CACHE_LINE_MASK (~(L1_CACHE_BYTES - 1)) 21 22 /* 23 * ARC700 doesn't cache any access in top 256M. 24 * Ideal for wiring memory mapped peripherals as we don't need to do 25 * explicit uncached accesses (LD.di/ST.di) hence more portable drivers 26 */ 27 #define ARC_UNCACHED_ADDR_SPACE 0xc0000000 28 29 #ifndef __ASSEMBLY__ 30 31 /* Uncached access macros */ 32 #define arc_read_uncached_32(ptr) \ 33 ({ \ 34 unsigned int __ret; \ 35 __asm__ __volatile__( \ 36 " ld.di %0, [%1] \n" \ 37 : "=r"(__ret) \ 38 : "r"(ptr)); \ 39 __ret; \ 40 }) 41 42 #define arc_write_uncached_32(ptr, data)\ 43 ({ \ 44 __asm__ __volatile__( \ 45 " st.di %0, [%1] \n" \ 46 : \ 47 : "r"(data), "r"(ptr)); \ 48 }) 49 50 #define ARCH_DMA_MINALIGN L1_CACHE_BYTES 51 52 extern void arc_cache_init(void); 53 extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len); 54 extern void read_decode_cache_bcr(void); 55 56 #endif /* !__ASSEMBLY__ */ 57 58 #endif /* _ASM_CACHE_H */ 59