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 int ioc_enable;
66 extern unsigned long perip_base, perip_end;
67
68 #endif /* !__ASSEMBLY__ */
69
70 /* Instruction cache related Auxiliary registers */
71 #define ARC_REG_IC_BCR 0x77 /* Build Config reg */
72 #define ARC_REG_IC_IVIC 0x10
73 #define ARC_REG_IC_CTRL 0x11
74 #define ARC_REG_IC_IVIR 0x16
75 #define ARC_REG_IC_ENDR 0x17
76 #define ARC_REG_IC_IVIL 0x19
77 #define ARC_REG_IC_PTAG 0x1E
78 #define ARC_REG_IC_PTAG_HI 0x1F
79
80 /* Bit val in IC_CTRL */
81 #define IC_CTRL_DIS 0x1
82
83 /* Data cache related Auxiliary registers */
84 #define ARC_REG_DC_BCR 0x72 /* Build Config reg */
85 #define ARC_REG_DC_IVDC 0x47
86 #define ARC_REG_DC_CTRL 0x48
87 #define ARC_REG_DC_IVDL 0x4A
88 #define ARC_REG_DC_FLSH 0x4B
89 #define ARC_REG_DC_FLDL 0x4C
90 #define ARC_REG_DC_STARTR 0x4D
91 #define ARC_REG_DC_ENDR 0x4E
92 #define ARC_REG_DC_PTAG 0x5C
93 #define ARC_REG_DC_PTAG_HI 0x5F
94
95 /* Bit val in DC_CTRL */
96 #define DC_CTRL_DIS 0x001
97 #define DC_CTRL_INV_MODE_FLUSH 0x040
98 #define DC_CTRL_FLUSH_STATUS 0x100
99 #define DC_CTRL_RGN_OP_INV 0x200
100 #define DC_CTRL_RGN_OP_MSK 0x200
101
102 /*System-level cache (L2 cache) related Auxiliary registers */
103 #define ARC_REG_SLC_CFG 0x901
104 #define ARC_REG_SLC_CTRL 0x903
105 #define ARC_REG_SLC_FLUSH 0x904
106 #define ARC_REG_SLC_INVALIDATE 0x905
107 #define ARC_AUX_SLC_IVDL 0x910
108 #define ARC_AUX_SLC_FLDL 0x912
109 #define ARC_REG_SLC_RGN_START 0x914
110 #define ARC_REG_SLC_RGN_START1 0x915
111 #define ARC_REG_SLC_RGN_END 0x916
112 #define ARC_REG_SLC_RGN_END1 0x917
113
114 /* Bit val in SLC_CONTROL */
115 #define SLC_CTRL_DIS 0x001
116 #define SLC_CTRL_IM 0x040
117 #define SLC_CTRL_BUSY 0x100
118 #define SLC_CTRL_RGN_OP_INV 0x200
119
120 /* IO coherency related Auxiliary registers */
121 #define ARC_REG_IO_COH_ENABLE 0x500
122 #define ARC_IO_COH_ENABLE_BIT BIT(0)
123 #define ARC_REG_IO_COH_PARTIAL 0x501
124 #define ARC_IO_COH_PARTIAL_BIT BIT(0)
125 #define ARC_REG_IO_COH_AP0_BASE 0x508
126 #define ARC_REG_IO_COH_AP0_SIZE 0x509
127
128 #endif /* _ASM_CACHE_H */
129
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