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)
38 * Given a physical address and a length, return a virtual address
39 * that can be used to access the memory range with the caching
40 * properties specified by "flags".
42 #define MAP_NOCACHE (0)
43 #define MAP_WRCOMBINE (0)
44 #define MAP_WRBACK (0)
45 #define MAP_WRTHROUGH (0)
48 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
54 * Take down a mapping set up by map_physmem().
56 static inline void unmap_physmem(void *vaddr, unsigned long flags)
61 static inline phys_addr_t virt_to_phys(void * vaddr)
63 return (phys_addr_t)(vaddr);
67 * These are for ISA/PCI shared memory _only_ and should never be used
68 * on any other type of memory, including Zorro memory. They are meant to
69 * access the bus in the bus byte order which is little-endian!.
71 * readX/writeX() are used to access memory mapped devices. On some
72 * architectures the memory mapped IO stuff needs to be accessed
73 * differently. On the m68k architecture, we just read/write the
74 * memory location directly.
79 static inline unsigned char readb(const volatile void *addr)
84 __asm__ __volatile__ ("cli %1;\n\t"
85 "NOP; NOP; SSYNC;\n\t"
86 "%0 = b [%2] (z);\n\t"
88 : "=d"(val), "=d"(tmp): "a"(addr));
90 return (unsigned char) val;
93 static inline unsigned short readw(const volatile void *addr)
98 __asm__ __volatile__ ("cli %1;\n\t"
99 "NOP; NOP; SSYNC;\n\t"
100 "%0 = w [%2] (z);\n\t"
102 : "=d"(val), "=d"(tmp): "a"(addr));
104 return (unsigned short) val;
107 static inline unsigned int readl(const volatile void *addr)
112 __asm__ __volatile__ ("cli %1;\n\t"
113 "NOP; NOP; SSYNC;\n\t"
116 : "=d"(val), "=d"(tmp): "a"(addr));
120 #define __raw_readb readb
121 #define __raw_readw readw
122 #define __raw_readl readl
124 #endif /* __ASSEMBLY__ */
126 #define writeb(b, addr) (void)((*(volatile unsigned char *) (addr)) = (b))
127 #define writew(b, addr) (void)((*(volatile unsigned short *) (addr)) = (b))
128 #define writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
129 #define __raw_writeb writeb
130 #define __raw_writew writew
131 #define __raw_writel writel
133 #define memset_io(a, b, c) memset((void *)(a), (b), (c))
134 #define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
135 #define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
137 #if defined(CONFIG_STAMP_CF) || defined(CONFIG_BFIN_IDE)
138 /* This hack for CF/IDE needs to be addressed at some point */
139 extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
140 extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
141 extern unsigned char cf_inb(volatile unsigned char *addr);
142 extern void cf_outb(unsigned char val, volatile unsigned char *addr);
147 #define inb(addr) cf_inb((void *)(addr))
148 #define outb(x, addr) cf_outb((unsigned char)(x), (void *)(addr))
149 #define insw(port, addr, cnt) cf_insw((void *)(addr), (void *)(port), cnt)
150 #define outsw(port, addr, cnt) cf_outsw((void *)(port), (void *)(addr), cnt)