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Linux/arch/m32r/include/asm/io.h

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  1 #ifndef _ASM_M32R_IO_H
  2 #define _ASM_M32R_IO_H
  3 
  4 #include <linux/string.h>
  5 #include <linux/compiler.h>
  6 #include <asm/page.h>  /* __va */
  7 
  8 #ifdef __KERNEL__
  9 
 10 #define IO_SPACE_LIMIT  0xFFFFFFFF
 11 
 12 /**
 13  *      virt_to_phys    -       map virtual addresses to physical
 14  *      @address: address to remap
 15  *
 16  *      The returned physical address is the physical (CPU) mapping for
 17  *      the memory address given. It is only valid to use this function on
 18  *      addresses directly mapped or allocated via kmalloc.
 19  *
 20  *      This function does not give bus mappings for DMA transfers. In
 21  *      almost all conceivable cases a device driver should not be using
 22  *      this function
 23  */
 24 
 25 static inline unsigned long virt_to_phys(volatile void * address)
 26 {
 27         return __pa(address);
 28 }
 29 
 30 /**
 31  *      phys_to_virt    -       map physical address to virtual
 32  *      @address: address to remap
 33  *
 34  *      The returned virtual address is a current CPU mapping for
 35  *      the memory address given. It is only valid to use this function on
 36  *      addresses that have a kernel mapping
 37  *
 38  *      This function does not handle bus mappings for DMA transfers. In
 39  *      almost all conceivable cases a device driver should not be using
 40  *      this function
 41  */
 42 
 43 static inline void *phys_to_virt(unsigned long address)
 44 {
 45         return __va(address);
 46 }
 47 
 48 extern void __iomem *
 49 __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 50 
 51 /**
 52  *      ioremap         -       map bus memory into CPU space
 53  *      @offset:        bus address of the memory
 54  *      @size:          size of the resource to map
 55  *
 56  *      ioremap performs a platform specific sequence of operations to
 57  *      make bus memory CPU accessible via the readb/readw/readl/writeb/
 58  *      writew/writel functions and the other mmio helpers. The returned
 59  *      address is not guaranteed to be usable directly as a virtual
 60  *      address.
 61  */
 62 
 63 static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
 64 {
 65         return __ioremap(offset, size, 0);
 66 }
 67 
 68 extern void iounmap(volatile void __iomem *addr);
 69 #define ioremap_nocache(off,size) ioremap(off,size)
 70 
 71 /*
 72  * IO bus memory addresses are also 1:1 with the physical address
 73  */
 74 #define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
 75 #define page_to_bus     page_to_phys
 76 #define virt_to_bus     virt_to_phys
 77 
 78 extern unsigned char _inb(unsigned long);
 79 extern unsigned short _inw(unsigned long);
 80 extern unsigned long _inl(unsigned long);
 81 extern unsigned char _inb_p(unsigned long);
 82 extern unsigned short _inw_p(unsigned long);
 83 extern unsigned long _inl_p(unsigned long);
 84 extern void _outb(unsigned char, unsigned long);
 85 extern void _outw(unsigned short, unsigned long);
 86 extern void _outl(unsigned long, unsigned long);
 87 extern void _outb_p(unsigned char, unsigned long);
 88 extern void _outw_p(unsigned short, unsigned long);
 89 extern void _outl_p(unsigned long, unsigned long);
 90 extern void _insb(unsigned int, void *, unsigned long);
 91 extern void _insw(unsigned int, void *, unsigned long);
 92 extern void _insl(unsigned int, void *, unsigned long);
 93 extern void _outsb(unsigned int, const void *, unsigned long);
 94 extern void _outsw(unsigned int, const void *, unsigned long);
 95 extern void _outsl(unsigned int, const void *, unsigned long);
 96 
 97 static inline unsigned char _readb(unsigned long addr)
 98 {
 99         return *(volatile unsigned char __force *)addr;
100 }
101 
102 static inline unsigned short _readw(unsigned long addr)
103 {
104         return *(volatile unsigned short __force *)addr;
105 }
106 
107 static inline unsigned long _readl(unsigned long addr)
108 {
109         return *(volatile unsigned long __force *)addr;
110 }
111 
112 static inline void _writeb(unsigned char b, unsigned long addr)
113 {
114         *(volatile unsigned char __force *)addr = b;
115 }
116 
117 static inline void _writew(unsigned short w, unsigned long addr)
118 {
119         *(volatile unsigned short __force *)addr = w;
120 }
121 
122 static inline void _writel(unsigned long l, unsigned long addr)
123 {
124         *(volatile unsigned long __force *)addr = l;
125 }
126 
127 #define inb     _inb
128 #define inw     _inw
129 #define inl     _inl
130 #define outb    _outb
131 #define outw    _outw
132 #define outl    _outl
133 
134 #define inb_p   _inb_p
135 #define inw_p   _inw_p
136 #define inl_p   _inl_p
137 #define outb_p  _outb_p
138 #define outw_p  _outw_p
139 #define outl_p  _outl_p
140 
141 #define insb    _insb
142 #define insw    _insw
143 #define insl    _insl
144 #define outsb   _outsb
145 #define outsw   _outsw
146 #define outsl   _outsl
147 
148 #define readb(addr)   _readb((unsigned long)(addr))
149 #define readw(addr)   _readw((unsigned long)(addr))
150 #define readl(addr)   _readl((unsigned long)(addr))
151 #define __raw_readb readb
152 #define __raw_readw readw
153 #define __raw_readl readl
154 #define readb_relaxed readb
155 #define readw_relaxed readw
156 #define readl_relaxed readl
157 
158 #define writeb(val, addr)  _writeb((val), (unsigned long)(addr))
159 #define writew(val, addr)  _writew((val), (unsigned long)(addr))
160 #define writel(val, addr)  _writel((val), (unsigned long)(addr))
161 #define __raw_writeb writeb
162 #define __raw_writew writew
163 #define __raw_writel writel
164 
165 #define ioread8 read
166 #define ioread16 readw
167 #define ioread32 readl
168 #define iowrite8 writeb
169 #define iowrite16 writew
170 #define iowrite32 writel
171 
172 #define mmiowb()
173 
174 #define flush_write_buffers() do { } while (0)  /* M32R_FIXME */
175 
176 static inline void
177 memset_io(volatile void __iomem *addr, unsigned char val, int count)
178 {
179         memset((void __force *) addr, val, count);
180 }
181 
182 static inline void
183 memcpy_fromio(void *dst, volatile void __iomem *src, int count)
184 {
185         memcpy(dst, (void __force *) src, count);
186 }
187 
188 static inline void
189 memcpy_toio(volatile void __iomem *dst, const void *src, int count)
190 {
191         memcpy((void __force *) dst, src, count);
192 }
193 
194 /*
195  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
196  * access
197  */
198 #define xlate_dev_mem_ptr(p)    __va(p)
199 
200 /*
201  * Convert a virtual cached pointer to an uncached pointer
202  */
203 #define xlate_dev_kmem_ptr(p)   p
204 
205 #endif  /* __KERNEL__ */
206 
207 #endif  /* _ASM_M32R_IO_H */
208 

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