mirror of
https://github.com/torvalds/linux
synced 2024-10-04 10:26:40 +00:00
m68k: use asm-generic/io.h for non-MMU io access functions
There is nothing really special about the non-MMU m68k IO access functions. So we can easily switch to using the asm-generic/io.h functions. The only thing we do need to handle is that historically the m68k IO access functions for readw/readl/writew/writel use native CPU endian ordering. So for us on m68k/ColdFire that means they are big-endian. Leave the existing set of _raw_read/__raw_write and read/write macros in place to deal with them. (They are ripe for later cleanup, but that is for another patch). Signed-off-by: Greg Ungerer <gerg@linux-m68k.org> Reviewed-by: Angelo Dureghello <angelo@sysam.it> Tested-by: Angelo Dureghello <angelo@sysam.it>
This commit is contained in:
Greg Ungerer
parent
f8f3304856
commit
d97cf70af0
|
|
@ -2,40 +2,11 @@
|
|||
#ifndef _M68KNOMMU_IO_H
|
||||
#define _M68KNOMMU_IO_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#define ARCH_HAS_IOREMAP_WT
|
||||
|
||||
#include <asm/virtconvert.h>
|
||||
#include <asm-generic/iomap.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.
|
||||
* The non-MMU m68k and ColdFire IO and memory mapped hardware access
|
||||
* functions have always worked in CPU native endian. We need to define
|
||||
* that behavior here first before we include asm-generic/io.h.
|
||||
*/
|
||||
/* ++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) \
|
||||
|
|
@ -54,147 +25,7 @@ static inline unsigned int _swapl(volatile unsigned long v)
|
|||
#define __raw_writew writew
|
||||
#define __raw_writel writel
|
||||
|
||||
static inline void io_outsb(unsigned int addr, const 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, const 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, const 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_wt(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
|
||||
|
||||
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
||||
{
|
||||
return (void __iomem *) port;
|
||||
}
|
||||
|
||||
static inline void ioport_unmap(void __iomem *p)
|
||||
{
|
||||
}
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#define readb_relaxed(addr) readb(addr)
|
||||
#define readw_relaxed(addr) readw(addr)
|
||||
#define readl_relaxed(addr) readl(addr)
|
||||
|
||||
#define writeb_relaxed(b, addr) writeb(b, addr)
|
||||
#define writew_relaxed(b, addr) writew(b, addr)
|
||||
#define writel_relaxed(b, addr) writel(b, addr)
|
||||
#include <asm/virtconvert.h>
|
||||
#include <asm-generic/io.h>
|
||||
|
||||
#endif /* _M68KNOMMU_IO_H */
|
||||
|
|
|
|||
Loading…
Reference in a new issue