1 #ifndef _M68KNOMMU_IO_H
2 #define _M68KNOMMU_IO_H
6 #include <asm/virtconvert.h>
7 #include <asm-generic/iomap.h>
10 * These are for ISA/PCI shared memory _only_ and should never be used
11 * on any other type of memory, including Zorro memory. They are meant to
12 * access the bus in the bus byte order which is little-endian!.
14 * readX/writeX() are used to access memory mapped devices. On some
15 * architectures the memory mapped IO stuff needs to be accessed
16 * differently. On the m68k architecture, we just read/write the
17 * memory location directly.
19 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
20 * two accesses to memory, which may be undesirable for some devices.
24 * swap functions are sometimes needed to interface little-endian hardware
26 static inline unsigned short _swapw(volatile unsigned short v)
28 return ((v << 8) | (v >> 8));
31 static inline unsigned int _swapl(volatile unsigned long v)
33 return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
37 ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
39 ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
41 ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
43 #define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b))
44 #define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b))
45 #define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))
47 #define __raw_readb readb
48 #define __raw_readw readw
49 #define __raw_readl readl
50 #define __raw_writeb writeb
51 #define __raw_writew writew
52 #define __raw_writel writel
54 static inline void io_outsb(unsigned int addr, const void *buf, int len)
56 volatile unsigned char *ap = (volatile unsigned char *) addr;
57 unsigned char *bp = (unsigned char *) buf;
62 static inline void io_outsw(unsigned int addr, const void *buf, int len)
64 volatile unsigned short *ap = (volatile unsigned short *) addr;
65 unsigned short *bp = (unsigned short *) buf;
70 static inline void io_outsl(unsigned int addr, const void *buf, int len)
72 volatile unsigned int *ap = (volatile unsigned int *) addr;
73 unsigned int *bp = (unsigned int *) buf;
78 static inline void io_insb(unsigned int addr, void *buf, int len)
80 volatile unsigned char *ap = (volatile unsigned char *) addr;
81 unsigned char *bp = (unsigned char *) buf;
86 static inline void io_insw(unsigned int addr, void *buf, int len)
88 volatile unsigned short *ap = (volatile unsigned short *) addr;
89 unsigned short *bp = (unsigned short *) buf;
94 static inline void io_insl(unsigned int addr, void *buf, int len)
96 volatile unsigned int *ap = (volatile unsigned int *) addr;
97 unsigned int *bp = (unsigned int *) buf;
105 * make the short names macros so specific devices
106 * can override them as required
109 #define memset_io(a,b,c) memset((void *)(a),(b),(c))
110 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
111 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
113 #define inb(addr) readb(addr)
114 #define inw(addr) readw(addr)
115 #define inl(addr) readl(addr)
116 #define outb(x,addr) ((void) writeb(x,addr))
117 #define outw(x,addr) ((void) writew(x,addr))
118 #define outl(x,addr) ((void) writel(x,addr))
120 #define inb_p(addr) inb(addr)
121 #define inw_p(addr) inw(addr)
122 #define inl_p(addr) inl(addr)
123 #define outb_p(x,addr) outb(x,addr)
124 #define outw_p(x,addr) outw(x,addr)
125 #define outl_p(x,addr) outl(x,addr)
127 #define outsb(a,b,l) io_outsb(a,b,l)
128 #define outsw(a,b,l) io_outsw(a,b,l)
129 #define outsl(a,b,l) io_outsl(a,b,l)
131 #define insb(a,b,l) io_insb(a,b,l)
132 #define insw(a,b,l) io_insw(a,b,l)
133 #define insl(a,b,l) io_insl(a,b,l)
135 #define IO_SPACE_LIMIT 0xffffffff
138 /* Values for nocacheflag and cmode */
139 #define IOMAP_FULL_CACHING 0
140 #define IOMAP_NOCACHE_SER 1
141 #define IOMAP_NOCACHE_NONSER 2
142 #define IOMAP_WRITETHROUGH 3
144 static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
146 return (void *) physaddr;
148 static inline void *ioremap(unsigned long physaddr, unsigned long size)
150 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
152 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
154 return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
156 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
158 return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
160 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
162 return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
165 #define iounmap(addr) do { } while(0)
168 * Convert a physical pointer to a virtual kernel pointer for /dev/mem
171 #define xlate_dev_mem_ptr(p) __va(p)
174 * Convert a virtual cached pointer to an uncached pointer
176 #define xlate_dev_kmem_ptr(p) p
178 static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
180 return (void __iomem *) port;
183 static inline void ioport_unmap(void __iomem *p)
187 #endif /* __KERNEL__ */
189 #endif /* _M68KNOMMU_IO_H */