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- #ifndef _M68K_IO_H
- #define _M68K_IO_H
-
- #ifdef __KERNEL__
-
- #include <linux/config.h>
-
- #ifdef CONFIG_ATARI
- #include <asm/atarihw.h>
-
- #define SLOW_DOWN_IO do { if (MACH_IS_ATARI) MFPDELAY(); } while (0)
- #endif
-
- #include <asm/virtconvert.h>
-
- /*
- * 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)); __v; })
- #define readw(addr) \
- ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
- #define readl(addr) \
- ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __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 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_p(addr) readb(addr)
- #define inb(addr) readb(addr)
-
- #define outb(x,addr) ((void) writeb(x,addr))
- #define outb_p(x,addr) outb(x,addr)
-
-
- /* Values for nocacheflag and cmode */
- #define IOMAP_FULL_CACHING 0
- #define IOMAP_NOCACHE_SER 1
- #define IOMAP_NOCACHE_NONSER 2
- #define IOMAP_WRITETHROUGH 3
-
- 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);
-
- #endif /* __KERNEL__ */
-
- #endif /* _M68K_IO_H */
-