tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_M32R_IO_H
2#define _ASM_M32R_IO_H
3
4#include <linux/string.h>
5#include <linux/compiler.h>
6#include <asm/page.h> /* __va */
7
8#ifdef __KERNEL__
9
10#define IO_SPACE_LIMIT 0xFFFFFFFF
11
12/**
13 * virt_to_phys - map virtual addresses to physical
14 * @address: address to remap
15 *
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.
19 *
20 * This function does not give bus mappings for DMA transfers. In
21 * almost all conceivable cases a device driver should not be using
22 * this function
23 */
24
25static inline unsigned long virt_to_phys(volatile void * address)
26{
27 return __pa(address);
28}
29
30/**
31 * phys_to_virt - map physical address to virtual
32 * @address: address to remap
33 *
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
37 *
38 * This function does not handle bus mappings for DMA transfers. In
39 * almost all conceivable cases a device driver should not be using
40 * this function
41 */
42
43static inline void *phys_to_virt(unsigned long address)
44{
45 return __va(address);
46}
47
48extern void __iomem *
49__ioremap(unsigned long offset, unsigned long size, unsigned long flags);
50
51/**
52 * ioremap - map bus memory into CPU space
53 * @offset: bus address of the memory
54 * @size: size of the resource to map
55 *
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
60 * address.
61 */
62
63static inline void __iomem *ioremap(unsigned long offset, unsigned long size)
64{
65 return __ioremap(offset, size, 0);
66}
67
68extern void iounmap(volatile void __iomem *addr);
69#define ioremap_nocache(off,size) ioremap(off,size)
70#define ioremap_wc ioremap_nocache
71#define ioremap_wt ioremap_nocache
72#define ioremap_uc ioremap_nocache
73
74/*
75 * IO bus memory addresses are also 1:1 with the physical address
76 */
77#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
78#define page_to_bus page_to_phys
79#define virt_to_bus virt_to_phys
80
81extern unsigned char _inb(unsigned long);
82extern unsigned short _inw(unsigned long);
83extern unsigned long _inl(unsigned long);
84extern unsigned char _inb_p(unsigned long);
85extern unsigned short _inw_p(unsigned long);
86extern unsigned long _inl_p(unsigned long);
87extern void _outb(unsigned char, unsigned long);
88extern void _outw(unsigned short, unsigned long);
89extern void _outl(unsigned long, unsigned long);
90extern void _outb_p(unsigned char, unsigned long);
91extern void _outw_p(unsigned short, unsigned long);
92extern void _outl_p(unsigned long, unsigned long);
93extern void _insb(unsigned int, void *, unsigned long);
94extern void _insw(unsigned int, void *, unsigned long);
95extern void _insl(unsigned int, void *, unsigned long);
96extern void _outsb(unsigned int, const void *, unsigned long);
97extern void _outsw(unsigned int, const void *, unsigned long);
98extern void _outsl(unsigned int, const void *, unsigned long);
99
100static inline unsigned char _readb(unsigned long addr)
101{
102 return *(volatile unsigned char __force *)addr;
103}
104
105static inline unsigned short _readw(unsigned long addr)
106{
107 return *(volatile unsigned short __force *)addr;
108}
109
110static inline unsigned long _readl(unsigned long addr)
111{
112 return *(volatile unsigned long __force *)addr;
113}
114
115static inline void _writeb(unsigned char b, unsigned long addr)
116{
117 *(volatile unsigned char __force *)addr = b;
118}
119
120static inline void _writew(unsigned short w, unsigned long addr)
121{
122 *(volatile unsigned short __force *)addr = w;
123}
124
125static inline void _writel(unsigned long l, unsigned long addr)
126{
127 *(volatile unsigned long __force *)addr = l;
128}
129
130#define inb _inb
131#define inw _inw
132#define inl _inl
133#define outb _outb
134#define outw _outw
135#define outl _outl
136
137#define inb_p _inb_p
138#define inw_p _inw_p
139#define inl_p _inl_p
140#define outb_p _outb_p
141#define outw_p _outw_p
142#define outl_p _outl_p
143
144#define insb _insb
145#define insw _insw
146#define insl _insl
147#define outsb _outsb
148#define outsw _outsw
149#define outsl _outsl
150
151#define readb(addr) _readb((unsigned long)(addr))
152#define readw(addr) _readw((unsigned long)(addr))
153#define readl(addr) _readl((unsigned long)(addr))
154#define __raw_readb readb
155#define __raw_readw readw
156#define __raw_readl readl
157#define readb_relaxed readb
158#define readw_relaxed readw
159#define readl_relaxed readl
160
161#define writeb(val, addr) _writeb((val), (unsigned long)(addr))
162#define writew(val, addr) _writew((val), (unsigned long)(addr))
163#define writel(val, addr) _writel((val), (unsigned long)(addr))
164#define __raw_writeb writeb
165#define __raw_writew writew
166#define __raw_writel writel
167#define writeb_relaxed writeb
168#define writew_relaxed writew
169#define writel_relaxed writel
170
171#define ioread8 readb
172#define ioread16 readw
173#define ioread32 readl
174#define iowrite8 writeb
175#define iowrite16 writew
176#define iowrite32 writel
177
178#define ioread8_rep(p, dst, count) insb((unsigned long)(p), (dst), (count))
179#define ioread16_rep(p, dst, count) insw((unsigned long)(p), (dst), (count))
180#define ioread32_rep(p, dst, count) insl((unsigned long)(p), (dst), (count))
181
182#define iowrite8_rep(p, src, count) outsb((unsigned long)(p), (src), (count))
183#define iowrite16_rep(p, src, count) outsw((unsigned long)(p), (src), (count))
184#define iowrite32_rep(p, src, count) outsl((unsigned long)(p), (src), (count))
185
186#define ioread16be(addr) be16_to_cpu(readw(addr))
187#define ioread32be(addr) be32_to_cpu(readl(addr))
188#define iowrite16be(v, addr) writew(cpu_to_be16(v), (addr))
189#define iowrite32be(v, addr) writel(cpu_to_be32(v), (addr))
190
191#define mmiowb()
192
193#define flush_write_buffers() do { } while (0) /* M32R_FIXME */
194
195static inline void
196memset_io(volatile void __iomem *addr, unsigned char val, int count)
197{
198 memset((void __force *) addr, val, count);
199}
200
201static inline void
202memcpy_fromio(void *dst, volatile void __iomem *src, int count)
203{
204 memcpy(dst, (void __force *) src, count);
205}
206
207static inline void
208memcpy_toio(volatile void __iomem *dst, const void *src, int count)
209{
210 memcpy((void __force *) dst, src, count);
211}
212
213/*
214 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
215 * access
216 */
217#define xlate_dev_mem_ptr(p) __va(p)
218
219/*
220 * Convert a virtual cached pointer to an uncached pointer
221 */
222#define xlate_dev_kmem_ptr(p) p
223
224#endif /* __KERNEL__ */
225
226#endif /* _ASM_M32R_IO_H */