#ifndef _M68KNOMMU_IO_H #define _M68KNOMMU_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. */ /* * 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); /* Nothing to do */ #define dma_cache_inv(_start,_size) do { } while (0) #define dma_cache_wback(_start,_size) do { } while (0) #define dma_cache_wback_inv(_start,_size) do { } 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) /* * Macros used for converting between virtual and physical mappings. */ #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 /* * 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 */