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- #ifndef _M68KNOMMU_IO_H
- #define _M68KNOMMU_IO_H
-
- #ifdef __KERNEL__
-
-
- /*
- * 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.
- */
-
- /*
- * swap functions are sometimes needed to interface little-endian hardware
- */
- static inline unsigned short _swapw(volatile unsigned short v)
- {
- return ((v << 8) | (v >> 8));
- }
-
- static inline unsigned int _swapl(volatile unsigned long v)
- {
- return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
- }
-
- #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 readb_relaxed(addr) readb(addr)
- #define readw_relaxed(addr) readw(addr)
- #define readl_relaxed(addr) readl(addr)
-
- #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
-
- static inline void io_outsb(unsigned int addr, void *buf, int len)
- {
- volatile unsigned char *ap = (volatile unsigned char *) addr;
- unsigned char *bp = (unsigned char *) buf;
- while (len--)
- *ap = *bp++;
- }
-
- static inline void io_outsw(unsigned int addr, void *buf, int len)
- {
- volatile unsigned short *ap = (volatile unsigned short *) addr;
- unsigned short *bp = (unsigned short *) buf;
- while (len--)
- *ap = _swapw(*bp++);
- }
-
- static inline void io_outsl(unsigned int addr, void *buf, int len)
- {
- volatile unsigned int *ap = (volatile unsigned int *) addr;
- unsigned int *bp = (unsigned int *) buf;
- while (len--)
- *ap = _swapl(*bp++);
- }
-
- static inline void io_insb(unsigned int addr, void *buf, int len)
- {
- volatile unsigned char *ap = (volatile unsigned char *) addr;
- unsigned char *bp = (unsigned char *) buf;
- while (len--)
- *bp++ = *ap;
- }
-
- static inline void io_insw(unsigned int addr, void *buf, int len)
- {
- volatile unsigned short *ap = (volatile unsigned short *) addr;
- unsigned short *bp = (unsigned short *) buf;
- while (len--)
- *bp++ = _swapw(*ap);
- }
-
- static inline void io_insl(unsigned int addr, void *buf, int len)
- {
- volatile unsigned int *ap = (volatile unsigned int *) addr;
- unsigned int *bp = (unsigned int *) buf;
- while (len--)
- *bp++ = _swapl(*ap);
- }
-
- #define mmiowb()
-
- /*
- * make the short names macros so specific devices
- * can override them as required
- */
-
- #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) readb(addr)
- #define inw(addr) readw(addr)
- #define inl(addr) readl(addr)
- #define outb(x,addr) ((void) writeb(x,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 outsb(a,b,l) io_outsb(a,b,l)
- #define outsw(a,b,l) io_outsw(a,b,l)
- #define outsl(a,b,l) io_outsl(a,b,l)
-
- #define insb(a,b,l) io_insb(a,b,l)
- #define insw(a,b,l) io_insw(a,b,l)
- #define insl(a,b,l) io_insl(a,b,l)
-
- #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
-
- extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
- extern void __iounmap(void *addr, unsigned long size);
-
- static inline void *ioremap(unsigned long physaddr, unsigned long size)
- {
- return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
- }
- static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
- {
- return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
- }
- static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
- {
- return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
- }
- static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
- {
- return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
- }
-
- extern void iounmap(void *addr);
-
- /* Pages to physical address... */
- #define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
- #define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
-
- /*
- * Macros used for converting between virtual and physical mappings.
- */
- #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
-
- /*
- * Convert a physical pointer to a virtual kernel pointer for /dev/mem
- * access
- */
- #define xlate_dev_mem_ptr(p) __va(p)
-
- /*
- * Convert a virtual cached pointer to an uncached pointer
- */
- #define xlate_dev_kmem_ptr(p) p
-
- #endif /* __KERNEL__ */
-
- #endif /* _M68KNOMMU_IO_H */
-