2 * U-boot - io.h IO routines
4 * Copyright (c) 2005-2007 Analog Devices Inc.
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
25 #ifndef _BLACKFIN_IO_H
26 #define _BLACKFIN_IO_H
30 #include <asm/blackfin.h>
32 static inline void sync(void)
37 /* function prototypes for CF support */
38 extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
39 extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
40 extern unsigned char cf_inb(volatile unsigned char *addr);
41 extern void cf_outb(unsigned char val, volatile unsigned char *addr);
44 * Given a physical address and a length, return a virtual address
45 * that can be used to access the memory range with the caching
46 * properties specified by "flags".
48 typedef unsigned long phys_addr_t;
50 #define MAP_NOCACHE (0)
51 #define MAP_WRCOMBINE (0)
52 #define MAP_WRBACK (0)
53 #define MAP_WRTHROUGH (0)
56 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
62 * Take down a mapping set up by map_physmem().
64 static inline void unmap_physmem(void *vaddr, unsigned long flags)
70 * These are for ISA/PCI shared memory _only_ and should never be used
71 * on any other type of memory, including Zorro memory. They are meant to
72 * access the bus in the bus byte order which is little-endian!.
74 * readX/writeX() are used to access memory mapped devices. On some
75 * architectures the memory mapped IO stuff needs to be accessed
76 * differently. On the m68k architecture, we just read/write the
77 * memory location directly.
82 static inline unsigned char readb(const volatile void *addr)
87 __asm__ __volatile__ ("cli %1;\n\t"
88 "NOP; NOP; SSYNC;\n\t"
89 "%0 = b [%2] (z);\n\t"
91 : "=d"(val), "=d"(tmp): "a"(addr));
93 return (unsigned char) val;
96 static inline unsigned short readw(const volatile void *addr)
101 __asm__ __volatile__ ("cli %1;\n\t"
102 "NOP; NOP; SSYNC;\n\t"
103 "%0 = w [%2] (z);\n\t"
105 : "=d"(val), "=d"(tmp): "a"(addr));
107 return (unsigned short) val;
110 static inline unsigned int readl(const volatile void *addr)
115 __asm__ __volatile__ ("cli %1;\n\t"
116 "NOP; NOP; SSYNC;\n\t"
119 : "=d"(val), "=d"(tmp): "a"(addr));
123 #define __raw_readb readb
124 #define __raw_readw readw
125 #define __raw_readl readl
127 #endif /* __ASSEMBLY__ */
129 #define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b))
130 #define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b))
131 #define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
132 #define __raw_writeb writeb
133 #define __raw_writew writew
134 #define __raw_writel writel
136 #define memset_io(a, b, c) memset((void *)(a), (b), (c))
137 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
138 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
140 #define inb(addr) cf_inb((volatile unsigned char *)(addr))
141 #define outb(x, addr) cf_outb((unsigned char)(x), (volatile unsigned char *)(addr))
143 #define insw(port, addr, count) cf_insw((unsigned short *)addr, (unsigned short *)(port), (count))
145 #define outsw(port, addr, count) cf_outsw((unsigned short *)(port), (unsigned short *)addr, (count))
147 #define IO_SPACE_LIMIT 0xffff
149 /* Values for nocacheflag and cmode */
150 #define IOMAP_FULL_CACHING 0
151 #define IOMAP_NOCACHE_SER 1
152 #define IOMAP_NOCACHE_NONSER 2
153 #define IOMAP_WRITETHROUGH 3
155 extern void *__ioremap(unsigned long physaddr, unsigned long size,
157 extern void __iounmap(void *addr, unsigned long size);
159 extern inline void *ioremap(unsigned long physaddr, unsigned long size)
161 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
163 extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
165 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
167 extern inline void *ioremap_writethrough(unsigned long physaddr,
170 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
172 extern inline void *ioremap_fullcache(unsigned long physaddr,
175 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
178 extern void iounmap(void *addr);
180 extern void blkfin_inv_cache_all(void);
181 #define dma_cache_inv(_start, _size) do { blkfin_inv_cache_all(); } while (0)
182 #define dma_cache_wback(_start, _size) do { } while (0)
183 #define dma_cache_wback_inv(_start, _size) do { blkfin_inv_cache_all(); } while (0)