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git.ipfire.org Git - people/ms/u-boot.git/blob - arch/arc/include/asm/io.h
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2 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
4 * SPDX-License-Identifier: GPL-2.0+
10 #include <linux/types.h>
11 #include <asm/byteorder.h>
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".
18 #define MAP_NOCACHE (0)
19 #define MAP_WRCOMBINE (0)
20 #define MAP_WRBACK (0)
21 #define MAP_WRTHROUGH (0)
24 map_physmem(phys_addr_t paddr
, unsigned long len
, unsigned long flags
)
26 return (void *)((unsigned long)paddr
);
30 * Take down a mapping set up by map_physmem().
32 static inline void unmap_physmem(void *vaddr
, unsigned long flags
)
37 static inline void sync(void)
39 /* Not yet implemented */
42 static inline u8
__raw_readb(const volatile void __iomem
*addr
)
46 __asm__
__volatile__("ldb%U1 %0, %1\n"
48 : "m" (*(volatile u8 __force
*)addr
)
53 static inline u16
__raw_readw(const volatile void __iomem
*addr
)
57 __asm__
__volatile__("ldw%U1 %0, %1\n"
59 : "m" (*(volatile u16 __force
*)addr
)
64 static inline u32
__raw_readl(const volatile void __iomem
*addr
)
68 __asm__
__volatile__("ld%U1 %0, %1\n"
70 : "m" (*(volatile u32 __force
*)addr
)
75 #define readb __raw_readb
77 static inline u16
readw(const volatile void __iomem
*addr
)
79 return __le16_to_cpu(__raw_readw(addr
));
82 static inline u32
readl(const volatile void __iomem
*addr
)
84 return __le32_to_cpu(__raw_readl(addr
));
87 static inline void __raw_writeb(u8 b
, volatile void __iomem
*addr
)
89 __asm__
__volatile__("stb%U1 %0, %1\n"
91 : "r" (b
), "m" (*(volatile u8 __force
*)addr
)
95 static inline void __raw_writew(u16 s
, volatile void __iomem
*addr
)
97 __asm__
__volatile__("stw%U1 %0, %1\n"
99 : "r" (s
), "m" (*(volatile u16 __force
*)addr
)
103 static inline void __raw_writel(u32 w
, volatile void __iomem
*addr
)
105 __asm__
__volatile__("st%U1 %0, %1\n"
107 : "r" (w
), "m" (*(volatile u32 __force
*)addr
)
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)
115 static inline int __raw_readsb(unsigned int addr
, void *data
, int bytelen
)
117 __asm__
__volatile__ ("1:ld.di r8, [r0]\n"
120 "stb.ab r8, [r1, 1]\n"
122 : "r" (addr
), "r" (data
), "r" (bytelen
)
127 static inline int __raw_readsw(unsigned int addr
, void *data
, int wordlen
)
129 __asm__
__volatile__ ("1:ld.di r8, [r0]\n"
132 "stw.ab r8, [r1, 2]\n"
134 : "r" (addr
), "r" (data
), "r" (wordlen
)
139 static inline int __raw_readsl(unsigned int addr
, void *data
, int longlen
)
141 __asm__
__volatile__ ("1:ld.di r8, [r0]\n"
144 "st.ab r8, [r1, 4]\n"
146 : "r" (addr
), "r" (data
), "r" (longlen
)
151 static inline int __raw_writesb(unsigned int addr
, void *data
, int bytelen
)
153 __asm__
__volatile__ ("1:ldb.ab r8, [r1, 1]\n"
156 "st.di r8, [r0, 0]\n"
158 : "r" (addr
), "r" (data
), "r" (bytelen
)
163 static inline int __raw_writesw(unsigned int addr
, void *data
, int wordlen
)
165 __asm__
__volatile__ ("1:ldw.ab r8, [r1, 2]\n"
168 "st.ab.di r8, [r0, 0]\n"
170 : "r" (addr
), "r" (data
), "r" (wordlen
)
175 static inline int __raw_writesl(unsigned int addr
, void *data
, int longlen
)
177 __asm__
__volatile__ ("1:ld.ab r8, [r1, 4]\n"
180 "st.ab.di r8, [r0, 0]\n"
182 : "r" (addr
), "r" (data
), "r" (longlen
)
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))
190 #define out_le32(a, v) out_arch(l, le32, a, v)
191 #define out_le16(a, v) out_arch(w, le16, a, v)
193 #define in_le32(a) in_arch(l, le32, a)
194 #define in_le16(a) in_arch(w, le16, a)
196 #define out_be32(a, v) out_arch(l, be32, a, v)
197 #define out_be16(a, v) out_arch(w, be16, a, v)
199 #define in_be32(a) in_arch(l, be32, a)
200 #define in_be16(a) in_arch(w, be16, a)
202 #define out_8(a, v) __raw_writeb(v, a)
203 #define in_8(a) __raw_readb(a)
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.
213 #define clrbits(type, addr, clear) \
214 out_##type((addr), in_##type(addr) & ~(clear))
216 #define setbits(type, addr, set) \
217 out_##type((addr), in_##type(addr) | (set))
219 #define clrsetbits(type, addr, clear, set) \
220 out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
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)
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)
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)
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)
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)
242 #endif /* __ASM_ARC_IO_H */