Linux kernel mirror (for testing)
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1/*
2 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
3 * Copyright (C) 2007-2009 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
5 *
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
8 * for more details.
9 */
10
11#ifndef _ASM_MICROBLAZE_IO_H
12#define _ASM_MICROBLAZE_IO_H
13
14#include <asm/byteorder.h>
15#include <asm/page.h>
16#include <linux/types.h>
17#include <linux/mm.h> /* Get struct page {...} */
18
19
20#define IO_SPACE_LIMIT (0xFFFFFFFF)
21
22static inline unsigned char __raw_readb(const volatile void __iomem *addr)
23{
24 return *(volatile unsigned char __force *)addr;
25}
26static inline unsigned short __raw_readw(const volatile void __iomem *addr)
27{
28 return *(volatile unsigned short __force *)addr;
29}
30static inline unsigned int __raw_readl(const volatile void __iomem *addr)
31{
32 return *(volatile unsigned int __force *)addr;
33}
34static inline unsigned long __raw_readq(const volatile void __iomem *addr)
35{
36 return *(volatile unsigned long __force *)addr;
37}
38static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
39{
40 *(volatile unsigned char __force *)addr = v;
41}
42static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
43{
44 *(volatile unsigned short __force *)addr = v;
45}
46static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
47{
48 *(volatile unsigned int __force *)addr = v;
49}
50static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
51{
52 *(volatile unsigned long __force *)addr = v;
53}
54
55/*
56 * read (readb, readw, readl, readq) and write (writeb, writew,
57 * writel, writeq) accessors are for PCI and thus littel endian.
58 * Linux 2.4 for Microblaze had this wrong.
59 */
60static inline unsigned char readb(const volatile void __iomem *addr)
61{
62 return *(volatile unsigned char __force *)addr;
63}
64static inline unsigned short readw(const volatile void __iomem *addr)
65{
66 return le16_to_cpu(*(volatile unsigned short __force *)addr);
67}
68static inline unsigned int readl(const volatile void __iomem *addr)
69{
70 return le32_to_cpu(*(volatile unsigned int __force *)addr);
71}
72static inline void writeb(unsigned char v, volatile void __iomem *addr)
73{
74 *(volatile unsigned char __force *)addr = v;
75}
76static inline void writew(unsigned short v, volatile void __iomem *addr)
77{
78 *(volatile unsigned short __force *)addr = cpu_to_le16(v);
79}
80static inline void writel(unsigned int v, volatile void __iomem *addr)
81{
82 *(volatile unsigned int __force *)addr = cpu_to_le32(v);
83}
84
85/* ioread and iowrite variants. thease are for now same as __raw_
86 * variants of accessors. we might check for endianess in the feature
87 */
88#define ioread8(addr) __raw_readb((u8 *)(addr))
89#define ioread16(addr) __raw_readw((u16 *)(addr))
90#define ioread32(addr) __raw_readl((u32 *)(addr))
91#define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr))
92#define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
93#define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
94
95/* These are the definitions for the x86 IO instructions
96 * inb/inw/inl/outb/outw/outl, the "string" versions
97 * insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
98 * inb_p/inw_p/...
99 * The macros don't do byte-swapping.
100 */
101#define inb(port) readb((u8 *)((port)))
102#define outb(val, port) writeb((val), (u8 *)((unsigned long)(port)))
103#define inw(port) readw((u16 *)((port)))
104#define outw(val, port) writew((val), (u16 *)((unsigned long)(port)))
105#define inl(port) readl((u32 *)((port)))
106#define outl(val, port) writel((val), (u32 *)((unsigned long)(port)))
107
108#define inb_p(port) inb((port))
109#define outb_p(val, port) outb((val), (port))
110#define inw_p(port) inw((port))
111#define outw_p(val, port) outw((val), (port))
112#define inl_p(port) inl((port))
113#define outl_p(val, port) outl((val), (port))
114
115#define memset_io(a, b, c) memset((void *)(a), (b), (c))
116#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
117#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
118
119#ifdef CONFIG_MMU
120
121#define mm_ptov(addr) ((void *)__phys_to_virt(addr))
122#define mm_vtop(addr) ((unsigned long)__virt_to_phys(addr))
123#define phys_to_virt(addr) ((void *)__phys_to_virt(addr))
124#define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr))
125#define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr))
126
127#define __page_address(page) \
128 (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
129#define page_to_phys(page) virt_to_phys((void *)__page_address(page))
130#define page_to_bus(page) (page_to_phys(page))
131#define bus_to_virt(addr) (phys_to_virt(addr))
132
133extern void iounmap(void *addr);
134/*extern void *__ioremap(phys_addr_t address, unsigned long size,
135 unsigned long flags);*/
136extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
137#define ioremap_writethrough(addr, size) ioremap((addr), (size))
138#define ioremap_nocache(addr, size) ioremap((addr), (size))
139#define ioremap_fullcache(addr, size) ioremap((addr), (size))
140
141#else /* CONFIG_MMU */
142
143/**
144 * virt_to_phys - map virtual addresses to physical
145 * @address: address to remap
146 *
147 * The returned physical address is the physical (CPU) mapping for
148 * the memory address given. It is only valid to use this function on
149 * addresses directly mapped or allocated via kmalloc.
150 *
151 * This function does not give bus mappings for DMA transfers. In
152 * almost all conceivable cases a device driver should not be using
153 * this function
154 */
155static inline unsigned long __iomem virt_to_phys(volatile void *address)
156{
157 return __pa((unsigned long)address);
158}
159
160#define virt_to_bus virt_to_phys
161
162/**
163 * phys_to_virt - map physical address to virtual
164 * @address: address to remap
165 *
166 * The returned virtual address is a current CPU mapping for
167 * the memory address given. It is only valid to use this function on
168 * addresses that have a kernel mapping
169 *
170 * This function does not handle bus mappings for DMA transfers. In
171 * almost all conceivable cases a device driver should not be using
172 * this function
173 */
174static inline void *phys_to_virt(unsigned long address)
175{
176 return (void *)__va(address);
177}
178
179#define bus_to_virt(a) phys_to_virt(a)
180
181static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
182 unsigned long flags)
183{
184 return (void *)address;
185}
186
187#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
188#define iounmap(addr) ((void)0)
189#define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
190
191#endif /* CONFIG_MMU */
192
193/*
194 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
195 * access
196 */
197#define xlate_dev_mem_ptr(p) __va(p)
198
199/*
200 * Convert a virtual cached pointer to an uncached pointer
201 */
202#define xlate_dev_kmem_ptr(p) p
203
204/*
205 * Big Endian
206 */
207#define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
208#define out_be16(a, v) __raw_writew((v), (a))
209
210#define in_be32(a) __raw_readl((const void __iomem __force *)(a))
211#define in_be16(a) __raw_readw(a)
212
213/*
214 * Little endian
215 */
216
217#define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a));
218#define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
219
220#define in_le32(a) __le32_to_cpu(__raw_readl(a))
221#define in_le16(a) __le16_to_cpu(__raw_readw(a))
222
223/* Byte ops */
224#define out_8(a, v) __raw_writeb((v), (a))
225#define in_8(a) __raw_readb(a)
226
227/* FIXME */
228static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
229{
230 return (void __iomem *) (port);
231}
232
233static inline void ioport_unmap(void __iomem *addr)
234{
235 /* Nothing to do */
236}
237
238#endif /* _ASM_MICROBLAZE_IO_H */