1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * IO definitions for the Hexagon architecture
5 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
13 #include <linux/types.h>
14 #include <asm/iomap.h>
16 #include <asm/cacheflush.h>
19 * We don't have PCI yet.
20 * _IO_BASE is pointing at what should be unused virtual space.
22 #define IO_SPACE_LIMIT 0xffff
23 #define _IO_BASE ((void __iomem *)0xfe000000)
25 #define IOMEM(x) ((void __force __iomem *)(x))
27 extern int remap_area_pages(unsigned long start, unsigned long phys_addr,
28 unsigned long end, unsigned long flags);
30 extern void iounmap(const volatile void __iomem *addr);
32 /* Defined in lib/io.c, needed for smc91x driver. */
33 extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
34 extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
36 extern void __raw_readsl(const void __iomem *addr, void *data, int wordlen);
37 extern void __raw_writesl(void __iomem *addr, const void *data, int wordlen);
39 #define readsw(p, d, l) __raw_readsw(p, d, l)
40 #define writesw(p, d, l) __raw_writesw(p, d, l)
42 #define readsl(p, d, l) __raw_readsl(p, d, l)
43 #define writesl(p, d, l) __raw_writesl(p, d, l)
46 * virt_to_phys - map virtual address to physical
47 * @address: address to map
49 static inline unsigned long virt_to_phys(volatile void *address)
55 * phys_to_virt - map physical address to virtual
56 * @address: address to map
58 static inline void *phys_to_virt(unsigned long address)
64 * convert a physical pointer to a virtual kernel pointer for
67 #define xlate_dev_mem_ptr(p) __va(p)
70 * IO port access primitives. Hexagon doesn't have special IO access
71 * instructions; all I/O is memory mapped.
73 * in/out are used for "ports", but we don't have "port instructions",
74 * so these are really just memory mapped too.
78 * readb - read byte from memory mapped device
79 * @addr: pointer to memory
81 * Operates on "I/O bus memory space"
83 static inline u8 readb(const volatile void __iomem *addr)
94 static inline u16 readw(const volatile void __iomem *addr)
105 static inline u32 readl(const volatile void __iomem *addr)
117 * writeb - write a byte to a memory location
118 * @data: data to write to
119 * @addr: pointer to memory
122 static inline void writeb(u8 data, volatile void __iomem *addr)
127 : "r" (addr), "r" (data)
132 static inline void writew(u16 data, volatile void __iomem *addr)
137 : "r" (addr), "r" (data)
143 static inline void writel(u32 data, volatile void __iomem *addr)
148 : "r" (addr), "r" (data)
153 #define __raw_writeb writeb
154 #define __raw_writew writew
155 #define __raw_writel writel
157 #define __raw_readb readb
158 #define __raw_readw readw
159 #define __raw_readl readl
162 * http://comments.gmane.org/gmane.linux.ports.arm.kernel/117626
165 #define readb_relaxed __raw_readb
166 #define readw_relaxed __raw_readw
167 #define readl_relaxed __raw_readl
169 #define writeb_relaxed __raw_writeb
170 #define writew_relaxed __raw_writew
171 #define writel_relaxed __raw_writel
173 void __iomem *ioremap(unsigned long phys_addr, unsigned long size);
174 #define ioremap_uc(X, Y) ioremap((X), (Y))
177 #define __raw_writel writel
179 static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
182 memcpy(dst, (void *) src, count);
185 static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
188 memcpy((void *) dst, src, count);
191 static inline void memset_io(volatile void __iomem *addr, int value,
194 memset((void __force *)addr, value, size);
197 #define PCI_IO_ADDR (volatile void __iomem *)
200 * inb - read byte from I/O port or something
201 * @port: address in I/O space
203 * Operates on "I/O bus I/O space"
205 static inline u8 inb(unsigned long port)
207 return readb(_IO_BASE + (port & IO_SPACE_LIMIT));
210 static inline u16 inw(unsigned long port)
212 return readw(_IO_BASE + (port & IO_SPACE_LIMIT));
215 static inline u32 inl(unsigned long port)
217 return readl(_IO_BASE + (port & IO_SPACE_LIMIT));
221 * outb - write a byte to a memory location
222 * @data: data to write to
223 * @addr: address in I/O space
225 static inline void outb(u8 data, unsigned long port)
227 writeb(data, _IO_BASE + (port & IO_SPACE_LIMIT));
230 static inline void outw(u16 data, unsigned long port)
232 writew(data, _IO_BASE + (port & IO_SPACE_LIMIT));
235 static inline void outl(u32 data, unsigned long port)
237 writel(data, _IO_BASE + (port & IO_SPACE_LIMIT));
248 static inline void insb(unsigned long port, void *buffer, int count)
259 static inline void insw(unsigned long port, void *buffer, int count)
270 static inline void insl(unsigned long port, void *buffer, int count)
281 static inline void outsb(unsigned long port, const void *buffer, int count)
284 const u8 *buf = buffer;
291 static inline void outsw(unsigned long port, const void *buffer, int count)
294 const u16 *buf = buffer;
301 static inline void outsl(unsigned long port, const void *buffer, int count)
304 const u32 *buf = buffer;
311 #endif /* __KERNEL__ */