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 21 /* For a rare case where customers have differently config I/D */ 22 #define ARC_ICACHE_LINE_LEN L1_CACHE_BYTES 23 #define ARC_DCACHE_LINE_LEN L1_CACHE_BYTES 24 25 #define ICACHE_LINE_MASK (~(ARC_ICACHE_LINE_LEN - 1)) 26 #define DCACHE_LINE_MASK (~(ARC_DCACHE_LINE_LEN - 1)) 27 28 /* 29 * ARC700 doesn't cache any access in top 256M. 30 * Ideal for wiring memory mapped peripherals as we don't need to do 31 * explicit uncached accesses (LD.di/ST.di) hence more portable drivers 32 */ 33 #define ARC_UNCACHED_ADDR_SPACE 0xc0000000 34 35 #ifndef __ASSEMBLY__ 36 37 /* Uncached access macros */ 38 #define arc_read_uncached_32(ptr) \ 39 ({ \ 40 unsigned int __ret; \ 41 __asm__ __volatile__( \ 42 " ld.di %0, [%1] \n" \ 43 : "=r"(__ret) \ 44 : "r"(ptr)); \ 45 __ret; \ 46 }) 47 48 #define arc_write_uncached_32(ptr, data)\ 49 ({ \ 50 __asm__ __volatile__( \ 51 " st.di %0, [%1] \n" \ 52 : \ 53 : "r"(data), "r"(ptr)); \ 54 }) 55 56 #define ARCH_DMA_MINALIGN L1_CACHE_BYTES 57 58 extern void arc_cache_init(void); 59 extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len); 60 extern void read_decode_cache_bcr(void); 61 62 #endif /* !__ASSEMBLY__ */ 63 64 #endif /* _ASM_CACHE_H */ 65