2 * U-boot - io.h IO routines
4 * Copyright (c) 2005 blackfin.uclinux.org
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., 59 Temple Place, Suite 330, 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 * These are for ISA/PCI shared memory _only_ and should never be used
45 * on any other type of memory, including Zorro memory. They are meant to
46 * access the bus in the bus byte order which is little-endian!.
48 * readX/writeX() are used to access memory mapped devices. On some
49 * architectures the memory mapped IO stuff needs to be accessed
50 * differently. On the m68k architecture, we just read/write the
51 * memory location directly.
54 #define readb(addr) ({ unsigned char __v = (*(volatile unsigned char *) (addr));asm("ssync;"); __v; })
55 #define readw(addr) ({ unsigned short __v = (*(volatile unsigned short *) (addr)); asm("ssync;");__v; })
56 #define readl(addr) ({ unsigned int __v = (*(volatile unsigned int *) (addr));asm("ssync;"); __v; })
58 #define writeb(b,addr) {((*(volatile unsigned char *) (addr)) = (b)); asm("ssync;");}
59 #define writew(b,addr) {((*(volatile unsigned short *) (addr)) = (b)); asm("ssync;");}
60 #define writel(b,addr) {((*(volatile unsigned int *) (addr)) = (b)); asm("ssync;");}
62 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
63 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
64 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
66 #define inb_p(addr) readb((addr) + BF533_PCIIO_BASE)
67 #define inb(addr) cf_inb((volatile unsigned char*)(addr))
69 #define outb(x,addr) cf_outb((unsigned char)(x), (volatile unsigned char*)(addr))
70 #define outb_p(x,addr) outb(x, (addr) + BF533_PCIIO_BASE)
72 #define inw(addr) readw((addr) + BF533_PCIIO_BASE)
73 #define inl(addr) readl((addr) + BF533_PCIIO_BASE)
75 #define outw(x,addr) writew(x, (addr) + BF533_PCIIO_BASE)
76 #define outl(x,addr) writel(x, (addr) + BF533_PCIIO_BASE)
78 #define insb(port, addr, count) memcpy((void*)addr, (void*)(BF533_PCIIO_BASE + port), count)
79 #define insw(port, addr, count) cf_insw((unsigned short*)addr, (unsigned short*)(port), (count))
80 #define insl(port, addr, count) memcpy((void*)addr, (void*)(BF533_PCIIO_BASE + port), (4*count))
82 #define outsb(port,addr,count) memcpy((void*)(BF533_PCIIO_BASE + port), (void*)addr, count)
83 #define outsw(port,addr,count) cf_outsw((unsigned short*)(port), (unsigned short*)addr, (count))
84 #define outsl(port,addr,count) memcpy((void*)(BF533_PCIIO_BASE + port), (void*)addr, (4*count))
86 #define IO_SPACE_LIMIT 0xffff
88 /* Values for nocacheflag and cmode */
89 #define IOMAP_FULL_CACHING 0
90 #define IOMAP_NOCACHE_SER 1
91 #define IOMAP_NOCACHE_NONSER 2
92 #define IOMAP_WRITETHROUGH 3
94 extern void *__ioremap(unsigned long physaddr, unsigned long size,
96 extern void __iounmap(void *addr, unsigned long size);
98 extern inline void *ioremap(unsigned long physaddr, unsigned long size)
100 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
102 extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
104 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
106 extern inline void *ioremap_writethrough(unsigned long physaddr,
109 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
111 extern inline void *ioremap_fullcache(unsigned long physaddr,
114 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
117 extern void iounmap(void *addr);
119 extern void blkfin_inv_cache_all(void);
120 #define dma_cache_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
121 #define dma_cache_wback(_start,_size) do { } while (0)
122 #define dma_cache_wback_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)