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 1G (0xc000_0000 to 0xFFFF_FFFF) 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 52extern void arc_cache_init(void); 53extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len); 54extern void read_decode_cache_bcr(void); 55 56extern int ioc_exists; 57extern unsigned long perip_base; 58 59#endif /* !__ASSEMBLY__ */ 60 61/* Instruction cache related Auxiliary registers */ 62#define ARC_REG_IC_BCR 0x77 /* Build Config reg */ 63#define ARC_REG_IC_IVIC 0x10 64#define ARC_REG_IC_CTRL 0x11 65#define ARC_REG_IC_IVIL 0x19 66#define ARC_REG_IC_PTAG 0x1E 67#define ARC_REG_IC_PTAG_HI 0x1F 68 69/* Bit val in IC_CTRL */ 70#define IC_CTRL_CACHE_DISABLE 0x1 71 72/* Data cache related Auxiliary registers */ 73#define ARC_REG_DC_BCR 0x72 /* Build Config reg */ 74#define ARC_REG_DC_IVDC 0x47 75#define ARC_REG_DC_CTRL 0x48 76#define ARC_REG_DC_IVDL 0x4A 77#define ARC_REG_DC_FLSH 0x4B 78#define ARC_REG_DC_FLDL 0x4C 79#define ARC_REG_DC_PTAG 0x5C 80#define ARC_REG_DC_PTAG_HI 0x5F 81 82/* Bit val in DC_CTRL */ 83#define DC_CTRL_INV_MODE_FLUSH 0x40 84#define DC_CTRL_FLUSH_STATUS 0x100 85 86/*System-level cache (L2 cache) related Auxiliary registers */ 87#define ARC_REG_SLC_CFG 0x901 88#define ARC_REG_SLC_CTRL 0x903 89#define ARC_REG_SLC_FLUSH 0x904 90#define ARC_REG_SLC_INVALIDATE 0x905 91#define ARC_REG_SLC_RGN_START 0x914 92#define ARC_REG_SLC_RGN_END 0x916 93 94/* Bit val in SLC_CONTROL */ 95#define SLC_CTRL_IM 0x040 96#define SLC_CTRL_DISABLE 0x001 97#define SLC_CTRL_BUSY 0x100 98#define SLC_CTRL_RGN_OP_INV 0x200 99 100/* IO coherency related Auxiliary registers */ 101#define ARC_REG_IO_COH_ENABLE 0x500 102#define ARC_REG_IO_COH_PARTIAL 0x501 103#define ARC_REG_IO_COH_AP0_BASE 0x508 104#define ARC_REG_IO_COH_AP0_SIZE 0x509 105 106#endif /* _ASM_CACHE_H */ 107