| /* |
| * 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 read_decode_cache_bcr(void); |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* _ASM_CACHE_H */ |