4 #include <linux/string.h>
5 #include <linux/compiler.h>
6 #include <asm/page.h> /* __va */
10 #define IO_SPACE_LIMIT 0xFFFFFFFF
13 * virt_to_phys - map virtual addresses to physical
14 * @address: address to remap
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.
20 * This function does not give bus mappings for DMA transfers. In
21 * almost all conceivable cases a device driver should not be using
25 static inline unsigned long virt_to_phys(volatile void * address
)
31 * phys_to_virt - map physical address to virtual
32 * @address: address to remap
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
38 * This function does not handle bus mappings for DMA transfers. In
39 * almost all conceivable cases a device driver should not be using
43 static inline void *phys_to_virt(unsigned long address
)
49 __ioremap(unsigned long offset
, unsigned long size
, unsigned long flags
);
52 * ioremap - map bus memory into CPU space
53 * @offset: bus address of the memory
54 * @size: size of the resource to map
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
63 static inline void __iomem
*ioremap(unsigned long offset
, unsigned long size
)
65 return __ioremap(offset
, size
, 0);
68 extern void iounmap(volatile void __iomem
*addr
);
69 #define ioremap_nocache(off,size) ioremap(off,size)
72 * IO bus memory addresses are also 1:1 with the physical address
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
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);
97 static inline unsigned char _readb(unsigned long addr
)
99 return *(volatile unsigned char __force
*)addr
;
102 static inline unsigned short _readw(unsigned long addr
)
104 return *(volatile unsigned short __force
*)addr
;
107 static inline unsigned long _readl(unsigned long addr
)
109 return *(volatile unsigned long __force
*)addr
;
112 static inline void _writeb(unsigned char b
, unsigned long addr
)
114 *(volatile unsigned char __force
*)addr
= b
;
117 static inline void _writew(unsigned short w
, unsigned long addr
)
119 *(volatile unsigned short __force
*)addr
= w
;
122 static inline void _writel(unsigned long l
, unsigned long addr
)
124 *(volatile unsigned long __force
*)addr
= l
;
137 #define outb_p _outb_p
138 #define outw_p _outw_p
139 #define outl_p _outl_p
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
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
167 #define flush_write_buffers() do { } while (0) /* M32R_FIXME */
170 * check_signature - find BIOS signatures
171 * @io_addr: mmio address to check
172 * @signature: signature block
173 * @length: length of signature
175 * Perform a signature comparison with the ISA mmio address io_addr.
176 * Returns 1 on a match.
178 * This function is deprecated. New drivers should use ioremap and
182 static inline int check_signature(void __iomem
*io_addr
,
183 const unsigned char *signature
, int length
)
187 printk("check_signature\n");
189 if (readb(io_addr
) != *signature
)
202 memset_io(volatile void __iomem
*addr
, unsigned char val
, int count
)
204 memset((void __force
*) addr
, val
, count
);
208 memcpy_fromio(void *dst
, volatile void __iomem
*src
, int count
)
210 memcpy(dst
, (void __force
*) src
, count
);
214 memcpy_toio(volatile void __iomem
*dst
, const void *src
, int count
)
216 memcpy((void __force
*) dst
, src
, count
);
220 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
223 #define xlate_dev_mem_ptr(p) __va(p)
226 * Convert a virtual cached pointer to an uncached pointer
228 #define xlate_dev_kmem_ptr(p) p
230 #endif /* __KERNEL__ */
232 #endif /* _ASM_M32R_IO_H */