2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
11 #ifndef _ASM_MICROBLAZE_IO_H
12 #define _ASM_MICROBLAZE_IO_H
14 #include <asm/byteorder.h>
16 #include <linux/types.h>
17 #include <asm/byteorder.h>
18 #include <linux/mm.h> /* Get struct page {...} */
21 #define IO_SPACE_LIMIT (0xFFFFFFFF)
23 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
25 return *(volatile unsigned char __force *)addr;
27 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
29 return *(volatile unsigned short __force *)addr;
31 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
33 return *(volatile unsigned int __force *)addr;
35 static inline unsigned long __raw_readq(const volatile void __iomem *addr)
37 return *(volatile unsigned long __force *)addr;
39 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
41 *(volatile unsigned char __force *)addr = v;
43 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
45 *(volatile unsigned short __force *)addr = v;
47 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
49 *(volatile unsigned int __force *)addr = v;
51 static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
53 *(volatile unsigned long __force *)addr = v;
57 * read (readb, readw, readl, readq) and write (writeb, writew,
58 * writel, writeq) accessors are for PCI and thus littel endian.
59 * Linux 2.4 for Microblaze had this wrong.
61 static inline unsigned char readb(const volatile void __iomem *addr)
63 return *(volatile unsigned char __force *)addr;
65 static inline unsigned short readw(const volatile void __iomem *addr)
67 return le16_to_cpu(*(volatile unsigned short __force *)addr);
69 static inline unsigned int readl(const volatile void __iomem *addr)
71 return le32_to_cpu(*(volatile unsigned int __force *)addr);
73 static inline void writeb(unsigned char v, volatile void __iomem *addr)
75 *(volatile unsigned char __force *)addr = v;
77 static inline void writew(unsigned short v, volatile void __iomem *addr)
79 *(volatile unsigned short __force *)addr = cpu_to_le16(v);
81 static inline void writel(unsigned int v, volatile void __iomem *addr)
83 *(volatile unsigned int __force *)addr = cpu_to_le32(v);
86 /* ioread and iowrite variants. thease are for now same as __raw_
87 * variants of accessors. we might check for endianess in the feature
89 #define ioread8(addr) __raw_readb((u8 *)(addr))
90 #define ioread16(addr) __raw_readw((u16 *)(addr))
91 #define ioread32(addr) __raw_readl((u32 *)(addr))
92 #define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr))
93 #define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
94 #define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
96 /* These are the definitions for the x86 IO instructions
97 * inb/inw/inl/outb/outw/outl, the "string" versions
98 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
100 * The macros don't do byte-swapping.
102 #define inb(port) readb((u8 *)((port)))
103 #define outb(val, port) writeb((val), (u8 *)((unsigned long)(port)))
104 #define inw(port) readw((u16 *)((port)))
105 #define outw(val, port) writew((val), (u16 *)((unsigned long)(port)))
106 #define inl(port) readl((u32 *)((port)))
107 #define outl(val, port) writel((val), (u32 *)((unsigned long)(port)))
109 #define inb_p(port) inb((port))
110 #define outb_p(val, port) outb((val), (port))
111 #define inw_p(port) inw((port))
112 #define outw_p(val, port) outw((val), (port))
113 #define inl_p(port) inl((port))
114 #define outl_p(val, port) outl((val), (port))
116 #define memset_io(a, b, c) memset((void *)(a), (b), (c))
117 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
118 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
122 #define mm_ptov(addr) ((void *)__phys_to_virt(addr))
123 #define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr))
124 #define phys_to_virt(addr) ((void *)__phys_to_virt(addr))
125 #define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr))
126 #define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr))
128 #define __page_address(page) \
129 (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
130 #define page_to_phys(page) virt_to_phys((void *)__page_address(page))
131 #define page_to_bus(page) (page_to_phys(page))
132 #define bus_to_virt(addr) (phys_to_virt(addr))
134 extern void iounmap(void *addr);
135 /*extern void *__ioremap(phys_addr_t address, unsigned long size,
136 unsigned long flags);*/
137 extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
138 #define ioremap_writethrough(addr, size) ioremap((addr), (size))
139 #define ioremap_nocache(addr, size) ioremap((addr), (size))
140 #define ioremap_fullcache(addr, size) ioremap((addr), (size))
142 #else /* CONFIG_MMU */
145 * virt_to_phys - map virtual addresses to physical
146 * @address: address to remap
148 * The returned physical address is the physical (CPU) mapping for
149 * the memory address given. It is only valid to use this function on
150 * addresses directly mapped or allocated via kmalloc.
152 * This function does not give bus mappings for DMA transfers. In
153 * almost all conceivable cases a device driver should not be using
156 static inline unsigned long __iomem virt_to_phys(volatile void *address)
158 return __pa((unsigned long)address);
161 #define virt_to_bus virt_to_phys
164 * phys_to_virt - map physical address to virtual
165 * @address: address to remap
167 * The returned virtual address is a current CPU mapping for
168 * the memory address given. It is only valid to use this function on
169 * addresses that have a kernel mapping
171 * This function does not handle bus mappings for DMA transfers. In
172 * almost all conceivable cases a device driver should not be using
175 static inline void *phys_to_virt(unsigned long address)
177 return (void *)__va(address);
180 #define bus_to_virt(a) phys_to_virt(a)
182 static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
185 return (void *)address;
188 #define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
189 #define iounmap(addr) ((void)0)
190 #define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
192 #endif /* CONFIG_MMU */
195 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
198 #define xlate_dev_mem_ptr(p) __va(p)
201 * Convert a virtual cached pointer to an uncached pointer
203 #define xlate_dev_kmem_ptr(p) p
208 #define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
209 #define out_be16(a, v) __raw_writew((v), (a))
211 #define in_be32(a) __raw_readl((const void __iomem __force *)(a))
212 #define in_be16(a) __raw_readw(a)
218 #define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a));
219 #define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
221 #define in_le32(a) __le32_to_cpu(__raw_readl(a))
222 #define in_le16(a) __le16_to_cpu(__raw_readw(a))
225 #define out_8(a, v) __raw_writeb((v), (a))
226 #define in_8(a) __raw_readb(a)
229 static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
231 return (void __iomem *) (port);
234 static inline void ioport_unmap(void __iomem *addr)
239 #endif /* _ASM_MICROBLAZE_IO_H */