184 lines
5.1 KiB
C
184 lines
5.1 KiB
C
#ifndef _M68KNOMMU_IO_H
|
|
#define _M68KNOMMU_IO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/virtconvert.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 undesirable 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 0xffffffff
|
|
|
|
|
|
/* Values for nocacheflag and cmode */
|
|
#define IOMAP_FULL_CACHING 0
|
|
#define IOMAP_NOCACHE_SER 1
|
|
#define IOMAP_NOCACHE_NONSER 2
|
|
#define IOMAP_WRITETHROUGH 3
|
|
|
|
static inline void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
|
|
{
|
|
return (void *) physaddr;
|
|
}
|
|
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);
|
|
}
|
|
|
|
#define iounmap(addr) do { } while(0)
|
|
|
|
/*
|
|
* 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 */
|