summaryrefslogtreecommitdiff
path: root/include/asm-blackfin/io-kernel.h
blob: 3c087c33ee93019127a2f9c36de0260eaca9c5a7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
 * U-boot - io-kernel.h
 *
 * Copyright (c) 2005 blackfin.uclinux.org
 *
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#ifndef _BLACKFIN_IO_H
#define _BLACKFIN_IO_H

#ifdef __KERNEL__

#include <linux/config.h>

/*
 * These are for ISA/PCI shared memory _only_ and should never be used
 * on any other type of memory, including Zorro memory. They are meant to
 * access the bus in the bus byte order which is little-endian!.
 *
 * readX/writeX() are used to access memory mapped devices. On some
 * architectures the memory mapped IO stuff needs to be accessed
 * differently. On the m68k architecture, we just read/write the
 * memory location directly.
 */
/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
 * two accesses to memory, which may be undesireable for some devices.
 */
#define readb(addr) ({ unsigned char __v = (*(volatile unsigned char *) (addr));asm("ssync;"); __v; })
#define readw(addr) ({ unsigned short __v = (*(volatile unsigned short *) (addr)); asm("ssync;");__v; })
#define readl(addr) ({ unsigned int __v = (*(volatile unsigned int *) (addr));asm("ssync;"); __v; })
#define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b))
#define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b))
#define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))
#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
#define __raw_writeb writeb
#define __raw_writew writew
#define __raw_writel writel
#define memset_io(a,b,c)	memset((void *)(a),(b),(c))
#define memcpy_fromio(a,b,c)	memcpy((a),(void *)(b),(c))
#define memcpy_toio(a,b,c)	memcpy((void *)(a),(b),(c))
#define inb(addr)	cf_inb((volatile unsigned char*)(addr))
#define inw(addr)	readw(addr)
#define inl(addr)	readl(addr)
#define outb(x,addr)	cf_outb((unsigned char)(x), (volatile unsigned char*)(addr))
#define outw(x,addr)	((void) writew(x,addr))
#define outl(x,addr)	((void) writel(x,addr))
#define inb_p(addr)	inb(addr)
#define inw_p(addr)	inw(addr)
#define inl_p(addr)	inl(addr)
#define outb_p(x,addr)	outb(x,addr)
#define outw_p(x,addr)	outw(x,addr)
#define outl_p(x,addr)	outl(x,addr)
#define insb(port, addr, count)	memcpy((void*)addr, (void*)port, count)
#define insw(port, addr, count)	cf_insw((unsigned short*)addr, (unsigned short*)(port), (count))
#define insl(port, addr, count)	memcpy((void*)addr, (void*)port, (4*count))
#define outsb(port, addr, count)	memcpy((void*)port, (void*)addr, count)
#define outsw(port,addr,count)		cf_outsw((unsigned short*)(port), (unsigned short*)addr, (count))
#define outsl(port, addr, count)	memcpy((void*)port, (void*)addr, (4*count))
#define IO_SPACE_LIMIT	0xffff

/* Values for nocacheflag and cmode */
#define IOMAP_FULL_CACHING		0
#define IOMAP_NOCACHE_SER		1
#define IOMAP_NOCACHE_NONSER		2
#define IOMAP_WRITETHROUGH		3

#ifndef __ASSEMBLY__
extern void *__ioremap(unsigned long physaddr, unsigned long size,
		       int cacheflag);
extern void __iounmap(void *addr, unsigned long size);
extern inline void *ioremap(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
extern inline void *ioremap_writethrough(unsigned long physaddr,
					 unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
}
extern inline void *ioremap_fullcache(unsigned long physaddr,
				      unsigned long size)
{
	return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
}

extern void iounmap(void *addr);

/* Nothing to do */

extern void blkfin_inv_cache_all(void);

#endif

#define dma_cache_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
#define dma_cache_wback(_start,_size) do { } while (0)
#define dma_cache_wback_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)

/* Pages to physical address... */
#define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
#define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)

#define mm_ptov(vaddr)		((void *) (vaddr))
#define mm_vtop(vaddr)		((unsigned long) (vaddr))
#define phys_to_virt(vaddr)	((void *) (vaddr))
#define virt_to_phys(vaddr)	((unsigned long) (vaddr))

#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt

#endif

#endif