/Ethereal-msm8939-beta9/arch/metag/include/asm/io.h

  1#ifndef _ASM_METAG_IO_H
  2#define _ASM_METAG_IO_H
  3
  4#include <linux/types.h>
  5
  6#define IO_SPACE_LIMIT  0
  7
  8#define page_to_bus page_to_phys
  9#define bus_to_page phys_to_page
 10
 11/*
 12 * Generic I/O
 13 */
 14
 15#define __raw_readb __raw_readb
 16static inline u8 __raw_readb(const volatile void __iomem *addr)
 17{
 18	u8 ret;
 19	asm volatile("GETB %0,[%1]"
 20		     : "=da" (ret)
 21		     : "da" (addr)
 22		     : "memory");
 23	return ret;
 24}
 25
 26#define __raw_readw __raw_readw
 27static inline u16 __raw_readw(const volatile void __iomem *addr)
 28{
 29	u16 ret;
 30	asm volatile("GETW %0,[%1]"
 31		     : "=da" (ret)
 32		     : "da" (addr)
 33		     : "memory");
 34	return ret;
 35}
 36
 37#define __raw_readl __raw_readl
 38static inline u32 __raw_readl(const volatile void __iomem *addr)
 39{
 40	u32 ret;
 41	asm volatile("GETD %0,[%1]"
 42		     : "=da" (ret)
 43		     : "da" (addr)
 44		     : "memory");
 45	return ret;
 46}
 47
 48#define __raw_readq __raw_readq
 49static inline u64 __raw_readq(const volatile void __iomem *addr)
 50{
 51	u64 ret;
 52	asm volatile("GETL %0,%t0,[%1]"
 53		     : "=da" (ret)
 54		     : "da" (addr)
 55		     : "memory");
 56	return ret;
 57}
 58
 59#define __raw_writeb __raw_writeb
 60static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
 61{
 62	asm volatile("SETB [%0],%1"
 63		     :
 64		     : "da" (addr),
 65		       "da" (b)
 66		     : "memory");
 67}
 68
 69#define __raw_writew __raw_writew
 70static inline void __raw_writew(u16 b, volatile void __iomem *addr)
 71{
 72	asm volatile("SETW [%0],%1"
 73		     :
 74		     : "da" (addr),
 75		       "da" (b)
 76		     : "memory");
 77}
 78
 79#define __raw_writel __raw_writel
 80static inline void __raw_writel(u32 b, volatile void __iomem *addr)
 81{
 82	asm volatile("SETD [%0],%1"
 83		     :
 84		     : "da" (addr),
 85		       "da" (b)
 86		     : "memory");
 87}
 88
 89#define __raw_writeq __raw_writeq
 90static inline void __raw_writeq(u64 b, volatile void __iomem *addr)
 91{
 92	asm volatile("SETL [%0],%1,%t1"
 93		     :
 94		     : "da" (addr),
 95		       "da" (b)
 96		     : "memory");
 97}
 98
 99/*
100 * The generic io.h can define all the other generic accessors
101 */
102
103#include <asm-generic/io.h>
104
105/*
106 * Despite being a 32bit architecture, Meta can do 64bit memory accesses
107 * (assuming the bus supports it).
108 */
109
110#define readq	__raw_readq
111#define writeq	__raw_writeq
112
113/*
114 * Meta specific I/O for accessing non-MMU areas.
115 *
116 * These can be provided with a physical address rather than an __iomem pointer
117 * and should only be used by core architecture code for accessing fixed core
118 * registers. Generic drivers should use ioremap and the generic I/O accessors.
119 */
120
121#define metag_in8(addr)		__raw_readb((volatile void __iomem *)(addr))
122#define metag_in16(addr)	__raw_readw((volatile void __iomem *)(addr))
123#define metag_in32(addr)	__raw_readl((volatile void __iomem *)(addr))
124#define metag_in64(addr)	__raw_readq((volatile void __iomem *)(addr))
125
126#define metag_out8(b, addr)	__raw_writeb(b, (volatile void __iomem *)(addr))
127#define metag_out16(b, addr)	__raw_writew(b, (volatile void __iomem *)(addr))
128#define metag_out32(b, addr)	__raw_writel(b, (volatile void __iomem *)(addr))
129#define metag_out64(b, addr)	__raw_writeq(b, (volatile void __iomem *)(addr))
130
131/*
132 * io remapping functions
133 */
134
135extern void __iomem *__ioremap(unsigned long offset,
136			       size_t size, unsigned long flags);
137extern void __iounmap(void __iomem *addr);
138
139/**
140 *	ioremap		-	map bus memory into CPU space
141 *	@offset:	bus address of the memory
142 *	@size:		size of the resource to map
143 *
144 *	ioremap performs a platform specific sequence of operations to
145 *	make bus memory CPU accessible via the readb/readw/readl/writeb/
146 *	writew/writel functions and the other mmio helpers. The returned
147 *	address is not guaranteed to be usable directly as a virtual
148 *	address.
149 */
150#define ioremap(offset, size)                   \
151	__ioremap((offset), (size), 0)
152
153#define ioremap_nocache(offset, size)           \
154	__ioremap((offset), (size), 0)
155
156#define ioremap_cached(offset, size)            \
157	__ioremap((offset), (size), _PAGE_CACHEABLE)
158
159#define ioremap_wc(offset, size)                \
160	__ioremap((offset), (size), _PAGE_WR_COMBINE)
161
162#define iounmap(addr)                           \
163	__iounmap(addr)
164
165#endif  /* _ASM_METAG_IO_H */