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-rw-r--r--arch/blackfin/include/asm/io.h212
1 files changed, 212 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/io.h b/arch/blackfin/include/asm/io.h
new file mode 100644
index 000000000000..cbbf7ffdbbff
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+++ b/arch/blackfin/include/asm/io.h
@@ -0,0 +1,212 @@
1#ifndef _BFIN_IO_H
2#define _BFIN_IO_H
3
4#ifdef __KERNEL__
5
6#ifndef __ASSEMBLY__
7#include <linux/types.h>
8#endif
9#include <linux/compiler.h>
10
11/*
12 * These are for ISA/PCI shared memory _only_ and should never be used
13 * on any other type of memory, including Zorro memory. They are meant to
14 * access the bus in the bus byte order which is little-endian!.
15 *
16 * readX/writeX() are used to access memory mapped devices. On some
17 * architectures the memory mapped IO stuff needs to be accessed
18 * differently. On the bfin architecture, we just read/write the
19 * memory location directly.
20 */
21#ifndef __ASSEMBLY__
22
23static inline unsigned char readb(const volatile void __iomem *addr)
24{
25 unsigned int val;
26 int tmp;
27
28 __asm__ __volatile__ ("cli %1;\n\t"
29 "NOP; NOP; SSYNC;\n\t"
30 "%0 = b [%2] (z);\n\t"
31 "sti %1;\n\t"
32 : "=d"(val), "=d"(tmp): "a"(addr)
33 );
34
35 return (unsigned char) val;
36}
37
38static inline unsigned short readw(const volatile void __iomem *addr)
39{
40 unsigned int val;
41 int tmp;
42
43 __asm__ __volatile__ ("cli %1;\n\t"
44 "NOP; NOP; SSYNC;\n\t"
45 "%0 = w [%2] (z);\n\t"
46 "sti %1;\n\t"
47 : "=d"(val), "=d"(tmp): "a"(addr)
48 );
49
50 return (unsigned short) val;
51}
52
53static inline unsigned int readl(const volatile void __iomem *addr)
54{
55 unsigned int val;
56 int tmp;
57
58 __asm__ __volatile__ ("cli %1;\n\t"
59 "NOP; NOP; SSYNC;\n\t"
60 "%0 = [%2];\n\t"
61 "sti %1;\n\t"
62 : "=d"(val), "=d"(tmp): "a"(addr)
63 );
64 return val;
65}
66
67#endif /* __ASSEMBLY__ */
68
69#define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b))
70#define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b))
71#define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))
72
73#define __raw_readb readb
74#define __raw_readw readw
75#define __raw_readl readl
76#define __raw_writeb writeb
77#define __raw_writew writew
78#define __raw_writel writel
79#define memset_io(a,b,c) memset((void *)(a),(b),(c))
80#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
81#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
82
83#define inb(addr) readb(addr)
84#define inw(addr) readw(addr)
85#define inl(addr) readl(addr)
86#define outb(x,addr) ((void) writeb(x,addr))
87#define outw(x,addr) ((void) writew(x,addr))
88#define outl(x,addr) ((void) writel(x,addr))
89
90#define inb_p(addr) inb(addr)
91#define inw_p(addr) inw(addr)
92#define inl_p(addr) inl(addr)
93#define outb_p(x,addr) outb(x,addr)
94#define outw_p(x,addr) outw(x,addr)
95#define outl_p(x,addr) outl(x,addr)
96
97#define ioread8_rep(a,d,c) insb(a,d,c)
98#define ioread16_rep(a,d,c) insw(a,d,c)
99#define ioread32_rep(a,d,c) insl(a,d,c)
100#define iowrite8_rep(a,s,c) outsb(a,s,c)
101#define iowrite16_rep(a,s,c) outsw(a,s,c)
102#define iowrite32_rep(a,s,c) outsl(a,s,c)
103
104#define ioread8(X) readb(X)
105#define ioread16(X) readw(X)
106#define ioread32(X) readl(X)
107#define iowrite8(val,X) writeb(val,X)
108#define iowrite16(val,X) writew(val,X)
109#define iowrite32(val,X) writel(val,X)
110
111#define IO_SPACE_LIMIT 0xffffffff
112
113/* Values for nocacheflag and cmode */
114#define IOMAP_NOCACHE_SER 1
115
116#ifndef __ASSEMBLY__
117
118extern void outsb(unsigned long port, const void *addr, unsigned long count);
119extern void outsw(unsigned long port, const void *addr, unsigned long count);
120extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
121extern void outsl(unsigned long port, const void *addr, unsigned long count);
122
123extern void insb(unsigned long port, void *addr, unsigned long count);
124extern void insw(unsigned long port, void *addr, unsigned long count);
125extern void insw_8(unsigned long port, void *addr, unsigned long count);
126extern void insl(unsigned long port, void *addr, unsigned long count);
127extern void insl_16(unsigned long port, void *addr, unsigned long count);
128
129extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
130extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
131extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);
132
133extern void dma_insb(unsigned long port, void *addr, unsigned short count);
134extern void dma_insw(unsigned long port, void *addr, unsigned short count);
135extern void dma_insl(unsigned long port, void *addr, unsigned short count);
136
137/*
138 * Map some physical address range into the kernel address space.
139 */
140static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
141 int cacheflag)
142{
143 return (void __iomem *)physaddr;
144}
145
146/*
147 * Unmap a ioremap()ed region again
148 */
149static inline void iounmap(void *addr)
150{
151}
152
153/*
154 * __iounmap unmaps nearly everything, so be careful
155 * it doesn't free currently pointer/page tables anymore but it
156 * wans't used anyway and might be added later.
157 */
158static inline void __iounmap(void *addr, unsigned long size)
159{
160}
161
162/*
163 * Set new cache mode for some kernel address space.
164 * The caller must push data for that range itself, if such data may already
165 * be in the cache.
166 */
167static inline void kernel_set_cachemode(void *addr, unsigned long size,
168 int cmode)
169{
170}
171
172static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
173{
174 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
175}
176static inline void __iomem *ioremap_nocache(unsigned long physaddr,
177 unsigned long size)
178{
179 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
180}
181
182extern void blkfin_inv_cache_all(void);
183
184#endif
185
186#define ioport_map(port, nr) ((void __iomem*)(port))
187#define ioport_unmap(addr)
188
189/* Pages to physical address... */
190#define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
191#define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
192
193#define phys_to_virt(vaddr) ((void *) (vaddr))
194#define virt_to_phys(vaddr) ((unsigned long) (vaddr))
195
196#define virt_to_bus virt_to_phys
197#define bus_to_virt phys_to_virt
198
199/*
200 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
201 * access
202 */
203#define xlate_dev_mem_ptr(p) __va(p)
204
205/*
206 * Convert a virtual cached pointer to an uncached pointer
207 */
208#define xlate_dev_kmem_ptr(p) p
209
210#endif /* __KERNEL__ */
211
212#endif /* _BFIN_IO_H */