1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) 4 */ 5 6 #ifndef __ARC_ASM_CACHE_H 7 #define __ARC_ASM_CACHE_H 8 9 /* In case $$ not config, setup a dummy number for rest of kernel */ 10 #ifndef CONFIG_ARC_CACHE_LINE_SHIFT 11 #define L1_CACHE_SHIFT 6 12 #else 13 #define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT 14 #endif 15 16 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) 17 #define CACHE_LINE_MASK (~(L1_CACHE_BYTES - 1)) 18 19 /* 20 * ARC700 doesn't cache any access in top 1G (0xc000_0000 to 0xFFFF_FFFF) 21 * Ideal for wiring memory mapped peripherals as we don't need to do 22 * explicit uncached accesses (LD.di/ST.di) hence more portable drivers 23 */ 24 #define ARC_UNCACHED_ADDR_SPACE 0xc0000000 25 26 #ifndef __ASSEMBLY__ 27 28 #include <linux/build_bug.h> 29 30 /* Uncached access macros */ 31 #define arc_read_uncached_32(ptr) \ 32 ({ \ 33 unsigned int __ret; \ 34 __asm__ __volatile__( \ 35 " ld.di %0, [%1] \n" \ 36 : "=r"(__ret) \ 37 : "r"(ptr)); \ 38 __ret; \ 39 }) 40 41 #define arc_write_uncached_32(ptr, data)\ 42 ({ \ 43 __asm__ __volatile__( \ 44 " st.di %0, [%1] \n" \ 45 : \ 46 : "r"(data), "r"(ptr)); \ 47 }) 48 49 /* Largest line length for either L1 or L2 is 128 bytes */ 50 #define SMP_CACHE_BYTES 128 51 #define cache_line_size() SMP_CACHE_BYTES 52 #define ARCH_DMA_MINALIGN SMP_CACHE_BYTES 53 54 /* 55 * Make sure slab-allocated buffers are 64-bit aligned when atomic64_t uses 56 * ARCv2 64-bit atomics (LLOCKD/SCONDD). This guarantess runtime 64-bit 57 * alignment for any atomic64_t embedded in buffer. 58 * Default ARCH_SLAB_MINALIGN is __alignof__(long long) which has a relaxed 59 * value of 4 (and not 8) in ARC ABI. 60 */ 61 #if defined(CONFIG_ARC_HAS_LL64) && defined(CONFIG_ARC_HAS_LLSC) 62 #define ARCH_SLAB_MINALIGN 8 63 #endif 64 65 extern void arc_cache_init(void); 66 extern char *arc_cache_mumbojumbo(int cpu_id, char *buf, int len); 67 extern void read_decode_cache_bcr(void); 68 69 extern int ioc_enable; 70 extern unsigned long perip_base, perip_end; 71 72 #endif /* !__ASSEMBLY__ */ 73 74 /* Instruction cache related Auxiliary registers */ 75 #define ARC_REG_IC_BCR 0x77 /* Build Config reg */ 76 #define ARC_REG_IC_IVIC 0x10 77 #define ARC_REG_IC_CTRL 0x11 78 #define ARC_REG_IC_IVIR 0x16 79 #define ARC_REG_IC_ENDR 0x17 80 #define ARC_REG_IC_IVIL 0x19 81 #define ARC_REG_IC_PTAG 0x1E 82 #define ARC_REG_IC_PTAG_HI 0x1F 83 84 /* Bit val in IC_CTRL */ 85 #define IC_CTRL_DIS 0x1 86 87 /* Data cache related Auxiliary registers */ 88 #define ARC_REG_DC_BCR 0x72 /* Build Config reg */ 89 #define ARC_REG_DC_IVDC 0x47 90 #define ARC_REG_DC_CTRL 0x48 91 #define ARC_REG_DC_IVDL 0x4A 92 #define ARC_REG_DC_FLSH 0x4B 93 #define ARC_REG_DC_FLDL 0x4C 94 #define ARC_REG_DC_STARTR 0x4D 95 #define ARC_REG_DC_ENDR 0x4E 96 #define ARC_REG_DC_PTAG 0x5C 97 #define ARC_REG_DC_PTAG_HI 0x5F 98 99 /* Bit val in DC_CTRL */ 100 #define DC_CTRL_DIS 0x001 101 #define DC_CTRL_INV_MODE_FLUSH 0x040 102 #define DC_CTRL_FLUSH_STATUS 0x100 103 #define DC_CTRL_RGN_OP_INV 0x200 104 #define DC_CTRL_RGN_OP_MSK 0x200 105 106 /*System-level cache (L2 cache) related Auxiliary registers */ 107 #define ARC_REG_SLC_CFG 0x901 108 #define ARC_REG_SLC_CTRL 0x903 109 #define ARC_REG_SLC_FLUSH 0x904 110 #define ARC_REG_SLC_INVALIDATE 0x905 111 #define ARC_AUX_SLC_IVDL 0x910 112 #define ARC_AUX_SLC_FLDL 0x912 113 #define ARC_REG_SLC_RGN_START 0x914 114 #define ARC_REG_SLC_RGN_START1 0x915 115 #define ARC_REG_SLC_RGN_END 0x916 116 #define ARC_REG_SLC_RGN_END1 0x917 117 118 /* Bit val in SLC_CONTROL */ 119 #define SLC_CTRL_DIS 0x001 120 #define SLC_CTRL_IM 0x040 121 #define SLC_CTRL_BUSY 0x100 122 #define SLC_CTRL_RGN_OP_INV 0x200 123 124 /* IO coherency related Auxiliary registers */ 125 #define ARC_REG_IO_COH_ENABLE 0x500 126 #define ARC_IO_COH_ENABLE_BIT BIT(0) 127 #define ARC_REG_IO_COH_PARTIAL 0x501 128 #define ARC_IO_COH_PARTIAL_BIT BIT(0) 129 #define ARC_REG_IO_COH_AP0_BASE 0x508 130 #define ARC_REG_IO_COH_AP0_SIZE 0x509 131 132 #endif /* _ASM_CACHE_H */ 133