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 <linux/config.h>
32 /* function prototypes for CF support */
33 extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
34 extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
35 extern unsigned char cf_inb(volatile unsigned char *addr);
36 extern void cf_outb(unsigned char val, volatile unsigned char *addr);
38 static inline void sync(void)
40 __builtin_bfin_ssync();
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.
80 #define readb(addr) ({ unsigned char __v = (*(volatile unsigned char *) (addr));asm("ssync;"); __v; })
81 #define readw(addr) ({ unsigned short __v = (*(volatile unsigned short *) (addr)); asm("ssync;");__v; })
82 #define readl(addr) ({ unsigned int __v = (*(volatile unsigned int *) (addr));asm("ssync;"); __v; })
84 #define writeb(b,addr) {((*(volatile unsigned char *) (addr)) = (b)); asm("ssync;");}
85 #define writew(b,addr) {((*(volatile unsigned short *) (addr)) = (b)); asm("ssync;");}
86 #define writel(b,addr) {((*(volatile unsigned int *) (addr)) = (b)); asm("ssync;");}
88 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
89 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
90 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
92 #define inb_p(addr) readb((addr) + BF533_PCIIO_BASE)
93 #define inb(addr) cf_inb((volatile unsigned char*)(addr))
95 #define outb(x,addr) cf_outb((unsigned char)(x), (volatile unsigned char*)(addr))
96 #define outb_p(x,addr) outb(x, (addr) + BF533_PCIIO_BASE)
98 #define inw(addr) readw((addr) + BF533_PCIIO_BASE)
99 #define inl(addr) readl((addr) + BF533_PCIIO_BASE)
101 #define outw(x,addr) writew(x, (addr) + BF533_PCIIO_BASE)
102 #define outl(x,addr) writel(x, (addr) + BF533_PCIIO_BASE)
104 #define insb(port, addr, count) memcpy((void*)addr, (void*)(BF533_PCIIO_BASE + port), count)
105 #define insw(port, addr, count) cf_insw((unsigned short*)addr, (unsigned short*)(port), (count))
106 #define insl(port, addr, count) memcpy((void*)addr, (void*)(BF533_PCIIO_BASE + port), (4*count))
108 #define outsb(port,addr,count) memcpy((void*)(BF533_PCIIO_BASE + port), (void*)addr, count)
109 #define outsw(port,addr,count) cf_outsw((unsigned short*)(port), (unsigned short*)addr, (count))
110 #define outsl(port,addr,count) memcpy((void*)(BF533_PCIIO_BASE + port), (void*)addr, (4*count))
112 #define IO_SPACE_LIMIT 0xffff
114 /* Values for nocacheflag and cmode */
115 #define IOMAP_FULL_CACHING 0
116 #define IOMAP_NOCACHE_SER 1
117 #define IOMAP_NOCACHE_NONSER 2
118 #define IOMAP_WRITETHROUGH 3
120 extern void *__ioremap(unsigned long physaddr, unsigned long size,
122 extern void __iounmap(void *addr, unsigned long size);
124 extern inline void *ioremap(unsigned long physaddr, unsigned long size)
126 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
128 extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
130 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
132 extern inline void *ioremap_writethrough(unsigned long physaddr,
135 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
137 extern inline void *ioremap_fullcache(unsigned long physaddr,
140 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
143 extern void iounmap(void *addr);
145 extern void blkfin_inv_cache_all(void);
146 #define dma_cache_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
147 #define dma_cache_wback(_start,_size) do { } while (0)
148 #define dma_cache_wback_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)