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 #define MAP_NOCACHE (0)
49 #define MAP_WRCOMBINE (0)
50 #define MAP_WRBACK (0)
51 #define MAP_WRTHROUGH (0)
54 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
60 * Take down a mapping set up by map_physmem().
62 static inline void unmap_physmem(void *vaddr, unsigned long flags)
67 static inline phys_addr_t virt_to_phys(void * vaddr)
69 return (phys_addr_t)(vaddr);
73 * These are for ISA/PCI shared memory _only_ and should never be used
74 * on any other type of memory, including Zorro memory. They are meant to
75 * access the bus in the bus byte order which is little-endian!.
77 * readX/writeX() are used to access memory mapped devices. On some
78 * architectures the memory mapped IO stuff needs to be accessed
79 * differently. On the m68k architecture, we just read/write the
80 * memory location directly.
85 static inline unsigned char readb(const volatile void *addr)
90 __asm__ __volatile__ ("cli %1;\n\t"
91 "NOP; NOP; SSYNC;\n\t"
92 "%0 = b [%2] (z);\n\t"
94 : "=d"(val), "=d"(tmp): "a"(addr));
96 return (unsigned char) val;
99 static inline unsigned short readw(const volatile void *addr)
104 __asm__ __volatile__ ("cli %1;\n\t"
105 "NOP; NOP; SSYNC;\n\t"
106 "%0 = w [%2] (z);\n\t"
108 : "=d"(val), "=d"(tmp): "a"(addr));
110 return (unsigned short) val;
113 static inline unsigned int readl(const volatile void *addr)
118 __asm__ __volatile__ ("cli %1;\n\t"
119 "NOP; NOP; SSYNC;\n\t"
122 : "=d"(val), "=d"(tmp): "a"(addr));
126 #define __raw_readb readb
127 #define __raw_readw readw
128 #define __raw_readl readl
130 #endif /* __ASSEMBLY__ */
132 #define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b))
133 #define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b))
134 #define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
135 #define __raw_writeb writeb
136 #define __raw_writew writew
137 #define __raw_writel writel
139 #define memset_io(a, b, c) memset((void *)(a), (b), (c))
140 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
141 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
143 #define inb(addr) cf_inb((volatile unsigned char *)(addr))
144 #define outb(x, addr) cf_outb((unsigned char)(x), (volatile unsigned char *)(addr))
146 #define insw(port, addr, count) cf_insw((unsigned short *)addr, (unsigned short *)(port), (count))
148 #define outsw(port, addr, count) cf_outsw((unsigned short *)(port), (unsigned short *)addr, (count))
150 #define IO_SPACE_LIMIT 0xffff
152 /* Values for nocacheflag and cmode */
153 #define IOMAP_FULL_CACHING 0
154 #define IOMAP_NOCACHE_SER 1
155 #define IOMAP_NOCACHE_NONSER 2
156 #define IOMAP_WRITETHROUGH 3
158 extern void *__ioremap(unsigned long physaddr, unsigned long size,
160 extern void __iounmap(void *addr, unsigned long size);
162 extern inline void *ioremap(unsigned long physaddr, unsigned long size)
164 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
166 extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
168 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
170 extern inline void *ioremap_writethrough(unsigned long physaddr,
173 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
175 extern inline void *ioremap_fullcache(unsigned long physaddr,
178 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
181 extern void iounmap(void *addr);
183 extern void blkfin_inv_cache_all(void);
184 #define dma_cache_inv(_start, _size) do { blkfin_inv_cache_all(); } while (0)
185 #define dma_cache_wback(_start, _size) do { } while (0)
186 #define dma_cache_wback_inv(_start, _size) do { blkfin_inv_cache_all(); } while (0)