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288aaacf AB |
1 | /* |
2 | * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #ifndef __ASM_ARC_IO_H | |
8 | #define __ASM_ARC_IO_H | |
9 | ||
10 | #include <linux/types.h> | |
11 | #include <asm/byteorder.h> | |
12 | ||
90841dc2 AB |
13 | /* |
14 | * Given a physical address and a length, return a virtual address | |
15 | * that can be used to access the memory range with the caching | |
16 | * properties specified by "flags". | |
17 | */ | |
18 | #define MAP_NOCACHE (0) | |
19 | #define MAP_WRCOMBINE (0) | |
20 | #define MAP_WRBACK (0) | |
21 | #define MAP_WRTHROUGH (0) | |
22 | ||
23 | static inline void * | |
24 | map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) | |
25 | { | |
26 | return (void *)((unsigned long)paddr); | |
27 | } | |
28 | ||
29 | /* | |
30 | * Take down a mapping set up by map_physmem(). | |
31 | */ | |
32 | static inline void unmap_physmem(void *vaddr, unsigned long flags) | |
33 | { | |
34 | ||
35 | } | |
36 | ||
288aaacf AB |
37 | static inline void sync(void) |
38 | { | |
39 | /* Not yet implemented */ | |
40 | } | |
41 | ||
42 | static inline u8 __raw_readb(const volatile void __iomem *addr) | |
43 | { | |
44 | u8 b; | |
45 | ||
46 | __asm__ __volatile__("ldb%U1 %0, %1\n" | |
47 | : "=r" (b) | |
48 | : "m" (*(volatile u8 __force *)addr) | |
49 | : "memory"); | |
50 | return b; | |
51 | } | |
52 | ||
53 | static inline u16 __raw_readw(const volatile void __iomem *addr) | |
54 | { | |
55 | u16 s; | |
56 | ||
57 | __asm__ __volatile__("ldw%U1 %0, %1\n" | |
58 | : "=r" (s) | |
59 | : "m" (*(volatile u16 __force *)addr) | |
60 | : "memory"); | |
61 | return s; | |
62 | } | |
63 | ||
64 | static inline u32 __raw_readl(const volatile void __iomem *addr) | |
65 | { | |
66 | u32 w; | |
67 | ||
68 | __asm__ __volatile__("ld%U1 %0, %1\n" | |
69 | : "=r" (w) | |
70 | : "m" (*(volatile u32 __force *)addr) | |
71 | : "memory"); | |
72 | return w; | |
73 | } | |
74 | ||
75 | #define readb __raw_readb | |
76 | ||
77 | static inline u16 readw(const volatile void __iomem *addr) | |
78 | { | |
79 | return __le16_to_cpu(__raw_readw(addr)); | |
80 | } | |
81 | ||
82 | static inline u32 readl(const volatile void __iomem *addr) | |
83 | { | |
84 | return __le32_to_cpu(__raw_readl(addr)); | |
85 | } | |
86 | ||
87 | static inline void __raw_writeb(u8 b, volatile void __iomem *addr) | |
88 | { | |
89 | __asm__ __volatile__("stb%U1 %0, %1\n" | |
90 | : | |
91 | : "r" (b), "m" (*(volatile u8 __force *)addr) | |
92 | : "memory"); | |
93 | } | |
94 | ||
95 | static inline void __raw_writew(u16 s, volatile void __iomem *addr) | |
96 | { | |
97 | __asm__ __volatile__("stw%U1 %0, %1\n" | |
98 | : | |
99 | : "r" (s), "m" (*(volatile u16 __force *)addr) | |
100 | : "memory"); | |
101 | } | |
102 | ||
103 | static inline void __raw_writel(u32 w, volatile void __iomem *addr) | |
104 | { | |
105 | __asm__ __volatile__("st%U1 %0, %1\n" | |
106 | : | |
107 | : "r" (w), "m" (*(volatile u32 __force *)addr) | |
108 | : "memory"); | |
109 | } | |
110 | ||
111 | #define writeb __raw_writeb | |
112 | #define writew(b, addr) __raw_writew(__cpu_to_le16(b), addr) | |
113 | #define writel(b, addr) __raw_writel(__cpu_to_le32(b), addr) | |
114 | ||
115 | static inline int __raw_readsb(unsigned int addr, void *data, int bytelen) | |
116 | { | |
117 | __asm__ __volatile__ ("1:ld.di r8, [r0]\n" | |
118 | "sub.f r2, r2, 1\n" | |
119 | "bnz.d 1b\n" | |
120 | "stb.ab r8, [r1, 1]\n" | |
121 | : | |
122 | : "r" (addr), "r" (data), "r" (bytelen) | |
123 | : "r8"); | |
124 | return bytelen; | |
125 | } | |
126 | ||
127 | static inline int __raw_readsw(unsigned int addr, void *data, int wordlen) | |
128 | { | |
129 | __asm__ __volatile__ ("1:ld.di r8, [r0]\n" | |
130 | "sub.f r2, r2, 1\n" | |
131 | "bnz.d 1b\n" | |
132 | "stw.ab r8, [r1, 2]\n" | |
133 | : | |
134 | : "r" (addr), "r" (data), "r" (wordlen) | |
135 | : "r8"); | |
136 | return wordlen; | |
137 | } | |
138 | ||
139 | static inline int __raw_readsl(unsigned int addr, void *data, int longlen) | |
140 | { | |
141 | __asm__ __volatile__ ("1:ld.di r8, [r0]\n" | |
142 | "sub.f r2, r2, 1\n" | |
143 | "bnz.d 1b\n" | |
144 | "st.ab r8, [r1, 4]\n" | |
145 | : | |
146 | : "r" (addr), "r" (data), "r" (longlen) | |
147 | : "r8"); | |
148 | return longlen; | |
149 | } | |
150 | ||
151 | static inline int __raw_writesb(unsigned int addr, void *data, int bytelen) | |
152 | { | |
153 | __asm__ __volatile__ ("1:ldb.ab r8, [r1, 1]\n" | |
154 | "sub.f r2, r2, 1\n" | |
155 | "bnz.d 1b\n" | |
156 | "st.di r8, [r0, 0]\n" | |
157 | : | |
158 | : "r" (addr), "r" (data), "r" (bytelen) | |
159 | : "r8"); | |
160 | return bytelen; | |
161 | } | |
162 | ||
163 | static inline int __raw_writesw(unsigned int addr, void *data, int wordlen) | |
164 | { | |
165 | __asm__ __volatile__ ("1:ldw.ab r8, [r1, 2]\n" | |
166 | "sub.f r2, r2, 1\n" | |
167 | "bnz.d 1b\n" | |
168 | "st.ab.di r8, [r0, 0]\n" | |
169 | : | |
170 | : "r" (addr), "r" (data), "r" (wordlen) | |
171 | : "r8"); | |
172 | return wordlen; | |
173 | } | |
174 | ||
175 | static inline int __raw_writesl(unsigned int addr, void *data, int longlen) | |
176 | { | |
177 | __asm__ __volatile__ ("1:ld.ab r8, [r1, 4]\n" | |
178 | "sub.f r2, r2, 1\n" | |
179 | "bnz.d 1b\n" | |
180 | "st.ab.di r8, [r0, 0]\n" | |
181 | : | |
182 | : "r" (addr), "r" (data), "r" (longlen) | |
183 | : "r8"); | |
184 | return longlen; | |
185 | } | |
186 | ||
187 | #define out_arch(type, endian, a, v) __raw_write##type(cpu_to_##endian(v), a) | |
188 | #define in_arch(type, endian, a) endian##_to_cpu(__raw_read##type(a)) | |
189 | ||
190 | #define out_le32(a, v) out_arch(l, le32, a, v) | |
191 | #define out_le16(a, v) out_arch(w, le16, a, v) | |
192 | ||
193 | #define in_le32(a) in_arch(l, le32, a) | |
194 | #define in_le16(a) in_arch(w, le16, a) | |
195 | ||
196 | #define out_be32(a, v) out_arch(l, be32, a, v) | |
197 | #define out_be16(a, v) out_arch(w, be16, a, v) | |
198 | ||
199 | #define in_be32(a) in_arch(l, be32, a) | |
200 | #define in_be16(a) in_arch(w, be16, a) | |
201 | ||
202 | #define out_8(a, v) __raw_writeb(v, a) | |
203 | #define in_8(a) __raw_readb(a) | |
204 | ||
205 | /* | |
206 | * Clear and set bits in one shot. These macros can be used to clear and | |
207 | * set multiple bits in a register using a single call. These macros can | |
208 | * also be used to set a multiple-bit bit pattern using a mask, by | |
209 | * specifying the mask in the 'clear' parameter and the new bit pattern | |
210 | * in the 'set' parameter. | |
211 | */ | |
212 | ||
213 | #define clrbits(type, addr, clear) \ | |
214 | out_##type((addr), in_##type(addr) & ~(clear)) | |
215 | ||
216 | #define setbits(type, addr, set) \ | |
217 | out_##type((addr), in_##type(addr) | (set)) | |
218 | ||
219 | #define clrsetbits(type, addr, clear, set) \ | |
220 | out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) | |
221 | ||
222 | #define clrbits_be32(addr, clear) clrbits(be32, addr, clear) | |
223 | #define setbits_be32(addr, set) setbits(be32, addr, set) | |
224 | #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) | |
225 | ||
226 | #define clrbits_le32(addr, clear) clrbits(le32, addr, clear) | |
227 | #define setbits_le32(addr, set) setbits(le32, addr, set) | |
228 | #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) | |
229 | ||
230 | #define clrbits_be16(addr, clear) clrbits(be16, addr, clear) | |
231 | #define setbits_be16(addr, set) setbits(be16, addr, set) | |
232 | #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) | |
233 | ||
234 | #define clrbits_le16(addr, clear) clrbits(le16, addr, clear) | |
235 | #define setbits_le16(addr, set) setbits(le16, addr, set) | |
236 | #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) | |
237 | ||
238 | #define clrbits_8(addr, clear) clrbits(8, addr, clear) | |
239 | #define setbits_8(addr, set) setbits(8, addr, set) | |
240 | #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) | |
241 | ||
242 | #endif /* __ASM_ARC_IO_H */ |