blob: 2149685c179cee079c9d1ff284ab9d5dff5823f7 [file] [log] [blame]
Wolfgang Denk97caf672006-03-12 02:12:27 +01001/*
2 * U-boot - io.h IO routines
3 *
Aubrey Li314d22f2007-04-05 18:31:18 +08004 * Copyright (c) 2005-2007 Analog Devices Inc.
Wolfgang Denk97caf672006-03-12 02:12:27 +01005 *
6 * See file CREDITS for list of people who contributed to this
7 * project.
8 *
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.
13 *
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.
18 *
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
Aubrey Li314d22f2007-04-05 18:31:18 +080021 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
22 * MA 02110-1301 USA
Wolfgang Denk97caf672006-03-12 02:12:27 +010023 */
24
25#ifndef _BLACKFIN_IO_H
26#define _BLACKFIN_IO_H
27
Wolfgang Denk97caf672006-03-12 02:12:27 +010028#ifdef __KERNEL__
29
Mike Frysinger66c4cf42008-02-04 19:26:55 -050030#include <asm/blackfin.h>
31
32static inline void sync(void)
33{
34 SSYNC();
35}
Wolfgang Denk97caf672006-03-12 02:12:27 +010036
37/* function prototypes for CF support */
38extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
39extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
40extern unsigned char cf_inb(volatile unsigned char *addr);
Aubrey.Li9da597f2007-03-09 13:38:44 +080041extern void cf_outb(unsigned char val, volatile unsigned char *addr);
42
Wolfgang Denk97caf672006-03-12 02:12:27 +010043/*
Haavard Skinnemoenf9855512007-12-13 12:56:33 +010044 * 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".
47 */
48typedef unsigned long phys_addr_t;
49
50#define MAP_NOCACHE (0)
51#define MAP_WRCOMBINE (0)
52#define MAP_WRBACK (0)
53#define MAP_WRTHROUGH (0)
54
55static inline void *
56map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
57{
58 return (void *)paddr;
59}
60
61/*
62 * Take down a mapping set up by map_physmem().
63 */
64static inline void unmap_physmem(void *vaddr, unsigned long flags)
65{
66
67}
68
69/*
Wolfgang Denk97caf672006-03-12 02:12:27 +010070 * 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!.
73 *
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.
78 */
79
Mike Frysinger66c4cf42008-02-04 19:26:55 -050080#ifndef __ASSEMBLY__
81
82static inline unsigned char readb(const volatile void *addr)
83{
84 unsigned int val;
85 int tmp;
86
87 __asm__ __volatile__ ("cli %1;\n\t"
88 "NOP; NOP; SSYNC;\n\t"
89 "%0 = b [%2] (z);\n\t"
90 "sti %1;\n\t"
91 : "=d"(val), "=d"(tmp): "a"(addr));
92
93 return (unsigned char) val;
94}
95
96static inline unsigned short readw(const volatile void *addr)
97{
98 unsigned int val;
99 int tmp;
100
101 __asm__ __volatile__ ("cli %1;\n\t"
102 "NOP; NOP; SSYNC;\n\t"
103 "%0 = w [%2] (z);\n\t"
104 "sti %1;\n\t"
105 : "=d"(val), "=d"(tmp): "a"(addr));
106
107 return (unsigned short) val;
108}
109
110static inline unsigned int readl(const volatile void *addr)
111{
112 unsigned int val;
113 int tmp;
114
115 __asm__ __volatile__ ("cli %1;\n\t"
116 "NOP; NOP; SSYNC;\n\t"
117 "%0 = [%2];\n\t"
118 "sti %1;\n\t"
119 : "=d"(val), "=d"(tmp): "a"(addr));
120 return val;
121}
122
Mike Frysingere9e1aa92008-02-04 19:26:54 -0500123#define __raw_readb readb
124#define __raw_readw readw
125#define __raw_readl readl
Wolfgang Denk97caf672006-03-12 02:12:27 +0100126
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500127#endif /* __ASSEMBLY__ */
128
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))
Mike Frysingere9e1aa92008-02-04 19:26:54 -0500132#define __raw_writeb writeb
133#define __raw_writew writew
134#define __raw_writel writel
Wolfgang Denk97caf672006-03-12 02:12:27 +0100135
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500136#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))
Wolfgang Denk97caf672006-03-12 02:12:27 +0100139
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500140#define inb(addr) cf_inb((volatile unsigned char *)(addr))
141#define outb(x, addr) cf_outb((unsigned char)(x), (volatile unsigned char *)(addr))
Wolfgang Denk97caf672006-03-12 02:12:27 +0100142
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500143#define insw(port, addr, count) cf_insw((unsigned short *)addr, (unsigned short *)(port), (count))
Wolfgang Denk97caf672006-03-12 02:12:27 +0100144
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500145#define outsw(port, addr, count) cf_outsw((unsigned short *)(port), (unsigned short *)addr, (count))
Wolfgang Denk97caf672006-03-12 02:12:27 +0100146
147#define IO_SPACE_LIMIT 0xffff
148
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
154
155extern void *__ioremap(unsigned long physaddr, unsigned long size,
156 int cacheflag);
157extern void __iounmap(void *addr, unsigned long size);
158
159extern inline void *ioremap(unsigned long physaddr, unsigned long size)
160{
161 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
162}
Aubrey.Li9da597f2007-03-09 13:38:44 +0800163extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
Wolfgang Denk97caf672006-03-12 02:12:27 +0100164{
165 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
166}
167extern inline void *ioremap_writethrough(unsigned long physaddr,
168 unsigned long size)
169{
170 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
171}
172extern inline void *ioremap_fullcache(unsigned long physaddr,
173 unsigned long size)
174{
175 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
176}
177
178extern void iounmap(void *addr);
179
180extern void blkfin_inv_cache_all(void);
Mike Frysinger66c4cf42008-02-04 19:26:55 -0500181#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)
Wolfgang Denk97caf672006-03-12 02:12:27 +0100184
185#endif
186#endif