Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 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) |
Vineet Gupta | 63d2dfd | 2013-09-05 13:17:49 +0530 | [diff] [blame] | 20 | #define CACHE_LINE_MASK (~(L1_CACHE_BYTES - 1)) |
Vineet Gupta | 95d6976 | 2013-01-18 15:12:19 +0530 | [diff] [blame] | 21 | |
Vineet Gupta | da1677b | 2013-05-14 13:28:17 +0530 | [diff] [blame] | 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 | |
Vineet Gupta | 95d6976 | 2013-01-18 15:12:19 +0530 | [diff] [blame] | 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 | |
Vineet Gupta | 95d6976 | 2013-01-18 15:12:19 +0530 | [diff] [blame] | 50 | #define ARCH_DMA_MINALIGN L1_CACHE_BYTES |
| 51 | |
Vineet Gupta | 95d6976 | 2013-01-18 15:12:19 +0530 | [diff] [blame] | 52 | extern void arc_cache_init(void); |
| 53 | extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len); |
Vineet Gupta | 07b9b65 | 2013-09-05 19:19:06 +0530 | [diff] [blame] | 54 | extern void read_decode_cache_bcr(void); |
Vineet Gupta | da1677b | 2013-05-14 13:28:17 +0530 | [diff] [blame] | 55 | |
| 56 | #endif /* !__ASSEMBLY__ */ |
Vineet Gupta | 95d6976 | 2013-01-18 15:12:19 +0530 | [diff] [blame] | 57 | |
Vineet Gupta | 3be80aa | 2013-01-18 15:12:17 +0530 | [diff] [blame] | 58 | #endif /* _ASM_CACHE_H */ |