2 * U-Boot - io.h IO routines
4 * Copyright 2004-2009 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
10 #define _BLACKFIN_IO_H
14 #include <linux/compiler.h>
15 #include <asm/blackfin.h>
17 static inline void sync(void)
23 * Given a physical address and a length, return a virtual address
24 * that can be used to access the memory range with the caching
25 * properties specified by "flags".
27 #define MAP_NOCACHE (0)
28 #define MAP_WRCOMBINE (0)
29 #define MAP_WRBACK (0)
30 #define MAP_WRTHROUGH (0)
33 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
39 * Take down a mapping set up by map_physmem().
41 static inline void unmap_physmem(void *vaddr, unsigned long flags)
46 static inline phys_addr_t virt_to_phys(void * vaddr)
48 return (phys_addr_t)(vaddr);
52 * These are for ISA/PCI shared memory _only_ and should never be used
53 * on any other type of memory, including Zorro memory. They are meant to
54 * access the bus in the bus byte order which is little-endian!.
56 * readX/writeX() are used to access memory mapped devices. On some
57 * architectures the memory mapped IO stuff needs to be accessed
58 * differently. On the bfin architecture, we just read/write the
59 * memory location directly.
63 static inline unsigned char readb(const volatile void __iomem *addr)
68 __asm__ __volatile__ (
73 : "=d"(val), "=d"(tmp)
77 return (unsigned char) val;
80 static inline unsigned short readw(const volatile void __iomem *addr)
85 __asm__ __volatile__ (
90 : "=d"(val), "=d"(tmp)
94 return (unsigned short) val;
97 static inline unsigned int readl(const volatile void __iomem *addr)
102 __asm__ __volatile__ (
107 : "=d"(val), "=d"(tmp)
114 #endif /* __ASSEMBLY__ */
116 #define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b))
117 #define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b))
118 #define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
120 #define __raw_readb readb
121 #define __raw_readw readw
122 #define __raw_readl readl
123 #define __raw_writeb writeb
124 #define __raw_writew writew
125 #define __raw_writel writel
126 #define memset_io(a, b, c) memset((void *)(a), (b), (c))
127 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
128 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
130 /* Convert "I/O port addresses" to actual addresses. i.e. ugly casts. */
131 #define __io(port) ((void *)(unsigned long)(port))
133 #define inb(port) readb(__io(port))
134 #define inw(port) readw(__io(port))
135 #define inl(port) readl(__io(port))
136 #define in_le32(port) inl(port)
137 #define outb(x, port) writeb(x, __io(port))
138 #define outw(x, port) writew(x, __io(port))
139 #define outl(x, port) writel(x, __io(port))
140 #define out_le32(x, port) outl(x, port)
142 #define inb_p(port) inb(__io(port))
143 #define inw_p(port) inw(__io(port))
144 #define inl_p(port) inl(__io(port))
145 #define outb_p(x, port) outb(x, __io(port))
146 #define outw_p(x, port) outw(x, __io(port))
147 #define outl_p(x, port) outl(x, __io(port))
149 #define ioread8_rep(a, d, c) readsb(a, d, c)
150 #define ioread16_rep(a, d, c) readsw(a, d, c)
151 #define ioread32_rep(a, d, c) readsl(a, d, c)
152 #define iowrite8_rep(a, s, c) writesb(a, s, c)
153 #define iowrite16_rep(a, s, c) writesw(a, s, c)
154 #define iowrite32_rep(a, s, c) writesl(a, s, c)
156 #define ioread8(x) readb(x)
157 #define ioread16(x) readw(x)
158 #define ioread32(x) readl(x)
159 #define iowrite8(val, x) writeb(val, x)
160 #define iowrite16(val, x) writew(val, x)
161 #define iowrite32(val, x) writel(val, x)
163 #define mmiowb() wmb()
167 extern void outsb(unsigned long port, const void *addr, unsigned long count);
168 extern void outsw(unsigned long port, const void *addr, unsigned long count);
169 extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
170 extern void outsl(unsigned long port, const void *addr, unsigned long count);
172 extern void insb(unsigned long port, void *addr, unsigned long count);
173 extern void insw(unsigned long port, void *addr, unsigned long count);
174 extern void insw_8(unsigned long port, void *addr, unsigned long count);
175 extern void insl(unsigned long port, void *addr, unsigned long count);
176 extern void insl_16(unsigned long port, void *addr, unsigned long count);
178 static inline void readsl(const void __iomem *addr, void *buf, int len)
180 insl((unsigned long)addr, buf, len);
183 static inline void readsw(const void __iomem *addr, void *buf, int len)
185 insw((unsigned long)addr, buf, len);
188 static inline void readsb(const void __iomem *addr, void *buf, int len)
190 insb((unsigned long)addr, buf, len);
193 static inline void writesl(const void __iomem *addr, const void *buf, int len)
195 outsl((unsigned long)addr, buf, len);
198 static inline void writesw(const void __iomem *addr, const void *buf, int len)
200 outsw((unsigned long)addr, buf, len);
203 static inline void writesb(const void __iomem *addr, const void *buf, int len)
205 outsb((unsigned long)addr, buf, len);
208 #if defined(CONFIG_STAMP_CF) || defined(CONFIG_BFIN_IDE)
209 /* This hack for CF/IDE needs to be addressed at some point */
210 extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
211 extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
212 extern unsigned char cf_inb(volatile unsigned char *addr);
213 extern void cf_outb(unsigned char val, volatile unsigned char *addr);
218 #define inb(addr) cf_inb((void *)(addr))
219 #define outb(x, addr) cf_outb((unsigned char)(x), (void *)(addr))
220 #define insw(port, addr, cnt) cf_insw((void *)(addr), (void *)(port), cnt)
221 #define outsw(port, addr, cnt) cf_outsw((void *)(port), (void *)(addr), cnt)
226 #endif /* __KERNEL__ */