#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);
/* 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 */
