2 * Copyright (C) 2006 Atmark Techno, Inc.
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
9 #ifndef _ASM_MICROBLAZE_IO_H
10 #define _ASM_MICROBLAZE_IO_H
12 #include <asm/byteorder.h>
14 #include <linux/types.h>
16 #define IO_SPACE_LIMIT (0xFFFFFFFF)
18 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
20 return *(volatile unsigned char __force *)addr;
22 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
24 return *(volatile unsigned short __force *)addr;
26 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
28 return *(volatile unsigned int __force *)addr;
30 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
32 return *(volatile unsigned long __force *)addr;
34 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
36 *(volatile unsigned char __force *)addr = v;
38 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
40 *(volatile unsigned short __force *)addr = v;
42 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
44 *(volatile unsigned int __force *)addr = v;
46 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
48 *(volatile unsigned long __force *)addr = v;
52 * read (readb, readw, readl, readq) and write (writeb, writew,
53 * writel, writeq) accessors are for PCI and thus littel endian.
54 * Linux 2.4 for Microblaze had this wrong.
56 static inline unsigned char readb(const volatile void __iomem *addr)
58 return *(volatile unsigned char __force *)addr;
60 static inline unsigned short readw(const volatile void __iomem *addr)
62 return le16_to_cpu(*(volatile unsigned short __force *)addr);
64 static inline unsigned int readl(const volatile void __iomem *addr)
66 return le32_to_cpu(*(volatile unsigned int __force *)addr);
68 static inline void writeb(unsigned char v, volatile void __iomem *addr)
70 *(volatile unsigned char __force *)addr = v;
72 static inline void writew(unsigned short v, volatile void __iomem *addr)
74 *(volatile unsigned short __force *)addr = cpu_to_le16(v);
76 static inline void writel(unsigned int v, volatile void __iomem *addr)
78 *(volatile unsigned int __force *)addr = cpu_to_le32(v);
81 /* ioread and iowrite variants. thease are for now same as __raw_
82 * variants of accessors. we might check for endianess in the feature
84 #define ioread8(addr) __raw_readb((u8 *)(addr))
85 #define ioread16(addr) __raw_readw((u16 *)(addr))
86 #define ioread32(addr) __raw_readl((u32 *)(addr))
87 #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr))
88 #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
89 #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
91 /* These are the definitions for the x86 IO instructions
92 * inb/inw/inl/outb/outw/outl, the "string" versions
93 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
95 * The macros don't do byte-swapping.
97 #define inb(port) readb((u8 *)((port)))
98 #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port)))
99 #define inw(port) readw((u16 *)((port)))
100 #define outw(val, port) writew((val), (u16 *)((unsigned long)(port)))
101 #define inl(port) readl((u32 *)((port)))
102 #define outl(val, port) writel((val), (u32 *)((unsigned long)(port)))
104 #define inb_p(port) inb((port))
105 #define outb_p(val, port) outb((val), (port))
106 #define inw_p(port) inw((port))
107 #define outw_p(val, port) outw((val), (port))
108 #define inl_p(port) inl((port))
109 #define outl_p(val, port) outl((val), (port))
111 #define memset_io(a, b, c) memset((void *)(a), (b), (c))
112 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
113 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
116 * virt_to_phys - map virtual addresses to physical
117 * @address: address to remap
119 * The returned physical address is the physical (CPU) mapping for
120 * the memory address given. It is only valid to use this function on
121 * addresses directly mapped or allocated via kmalloc.
123 * This function does not give bus mappings for DMA transfers. In
124 * almost all conceivable cases a device driver should not be using
127 static inline unsigned long __iomem virt_to_phys(volatile void *address)
129 return __pa((unsigned long)address);
132 #define virt_to_bus virt_to_phys
135 * phys_to_virt - map physical address to virtual
136 * @address: address to remap
138 * The returned virtual address is a current CPU mapping for
139 * the memory address given. It is only valid to use this function on
140 * addresses that have a kernel mapping
142 * This function does not handle bus mappings for DMA transfers. In
143 * almost all conceivable cases a device driver should not be using
146 static inline void *phys_to_virt(unsigned long address)
148 return (void *)__va(address);
151 #define bus_to_virt(a) phys_to_virt(a)
153 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
156 return (void *)address;
159 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
160 #define iounmap(addr) ((void)0)
161 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
164 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
167 #define xlate_dev_mem_ptr(p) __va(p)
170 * Convert a virtual cached pointer to an uncached pointer
172 #define xlate_dev_kmem_ptr(p) p
177 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
178 #define out_be16(a, v) __raw_writew((v), (a))
180 #define in_be32(a) __raw_readl((const void __iomem __force *)(a))
181 #define in_be16(a) __raw_readw(a)
187 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a));
188 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
190 #define in_le32(a) __le32_to_cpu(__raw_readl(a))
191 #define in_le16(a) __le16_to_cpu(__raw_readw(a))
194 #define out_8(a, v) __raw_writeb((v), (a))
195 #define in_8(a) __raw_readb(a)
198 static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
200 return (void __iomem *) (port);
203 static inline void ioport_unmap(void __iomem *addr)
208 #endif /* _ASM_MICROBLAZE_IO_H */