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linux/include/asm-h8300/io.h
Ralf Baechle 622a9edd91 Remove dma_cache_(wback|inv|wback_inv) functions 
dma_cache_(wback|inv|wback_inv) were the earliest attempt on a generalized
cache managment API for I/O purposes.  Originally it was basically the raw
MIPS low level cache API exported to the entire world.  The API has
suffered from a lack of documentation, was not very widely used unlike it's
more modern brothers and can easily be replaced by dma_cache_sync.  So
remove it rsp.  turn the surviving bits back into an arch private API, as
discussed on linux-arch.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Acked-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Kyle McMartin <kyle@parisc-linux.org>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:57 -07:00

326 lines
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#ifndef _H8300_IO_H
#define _H8300_IO_H
#ifdef __KERNEL__
#include <asm/virtconvert.h>
#if defined(CONFIG_H83007) || defined(CONFIG_H83068)
#include <asm/regs306x.h>
#elif defined(CONFIG_H8S2678)
#include <asm/regs267x.h>
#else
#error UNKNOWN CPU TYPE
#endif
/*
* 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)
{
#ifndef H8300_IO_NOSWAP
unsigned short r;
__asm__("xor.b %w0,%x0\n\t"
"xor.b %x0,%w0\n\t"
"xor.b %w0,%x0"
:"=r"(r)
:"0"(v));
return r;
#else
return v;
#endif
}
static inline unsigned long _swapl(volatile unsigned long v)
{
#ifndef H8300_IO_NOSWAP
unsigned long r;
__asm__("xor.b %w0,%x0\n\t"
"xor.b %x0,%w0\n\t"
"xor.b %w0,%x0\n\t"
"xor.w %e0,%f0\n\t"
"xor.w %f0,%e0\n\t"
"xor.w %e0,%f0\n\t"
"xor.b %w0,%x0\n\t"
"xor.b %x0,%w0\n\t"
"xor.b %w0,%x0"
:"=r"(r)
:"0"(v));
return r;
#else
return v;
#endif
}
#define readb(addr) \
({ unsigned char __v = \
*(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \
__v; })
#define readw(addr) \
({ unsigned short __v = \
*(volatile unsigned short *)((unsigned long)(addr) & 0x00ffffff); \
__v; })
#define readl(addr) \
({ unsigned long __v = \
*(volatile unsigned long *)((unsigned long)(addr) & 0x00ffffff); \
__v; })
#define writeb(b,addr) (void)((*(volatile unsigned char *) \
((unsigned long)(addr) & 0x00ffffff)) = (b))
#define writew(b,addr) (void)((*(volatile unsigned short *) \
((unsigned long)(addr) & 0x00ffffff)) = (b))
#define writel(b,addr) (void)((*(volatile unsigned long *) \
((unsigned long)(addr) & 0x00ffffff)) = (b))
#define readb_relaxed(addr) readb(addr)
#define readw_relaxed(addr) readw(addr)
#define readl_relaxed(addr) readl(addr)
#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 int h8300_buswidth(unsigned int addr)
{
return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0;
}
static inline void io_outsb(unsigned int addr, const void *buf, int len)
{
volatile unsigned char *ap_b = (volatile unsigned char *) addr;
volatile unsigned short *ap_w = (volatile unsigned short *) addr;
unsigned char *bp = (unsigned char *) buf;
if(h8300_buswidth(addr) && (addr & 1)) {
while (len--)
*ap_w = *bp++;
} else {
while (len--)
*ap_b = *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 long *ap = (volatile unsigned long *) addr;
unsigned long *bp = (unsigned long *) buf;
while (len--)
*ap = _swapl(*bp++);
}
static inline void io_outsw_noswap(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 = *bp++;
}
static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len)
{
volatile unsigned long *ap = (volatile unsigned long *) addr;
unsigned long *bp = (unsigned long *) buf;
while (len--)
*ap = *bp++;
}
static inline void io_insb(unsigned int addr, void *buf, int len)
{
volatile unsigned char *ap_b;
volatile unsigned short *ap_w;
unsigned char *bp = (unsigned char *) buf;
if(h8300_buswidth(addr)) {
ap_w = (volatile unsigned short *)(addr & ~1);
while (len--)
*bp++ = *ap_w & 0xff;
} else {
ap_b = (volatile unsigned char *)addr;
while (len--)
*bp++ = *ap_b;
}
}
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 long *ap = (volatile unsigned long *) addr;
unsigned long *bp = (unsigned long *) buf;
while (len--)
*bp++ = _swapl(*ap);
}
static inline void io_insw_noswap(unsigned int addr, void *buf, int len)
{
volatile unsigned short *ap = (volatile unsigned short *) addr;
unsigned short *bp = (unsigned short *) buf;
while (len--)
*bp++ = *ap;
}
static inline void io_insl_noswap(unsigned int addr, void *buf, int len)
{
volatile unsigned long *ap = (volatile unsigned long *) addr;
unsigned long *bp = (unsigned long *) buf;
while (len--)
*bp++ = *ap;
}
/*
* 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 mmiowb()
#define inb(addr) ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr))
#define inw(addr) _swapw(readw(addr))
#define inl(addr) _swapl(readl(addr))
#define outb(x,addr) ((void)((h8300_buswidth(addr) && \
((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr)))
#define outw(x,addr) ((void) writew(_swapw(x),addr))
#define outl(x,addr) ((void) writel(_swapl(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 0xffffff
/* 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);
/* H8/300 internal I/O functions */
static __inline__ unsigned char ctrl_inb(unsigned long addr)
{
return *(volatile unsigned char*)addr;
}
static __inline__ unsigned short ctrl_inw(unsigned long addr)
{
return *(volatile unsigned short*)addr;
}
static __inline__ unsigned long ctrl_inl(unsigned long addr)
{
return *(volatile unsigned long*)addr;
}
static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
{
*(volatile unsigned char*)addr = b;
}
static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
{
*(volatile unsigned short*)addr = b;
}
static __inline__ void ctrl_outl(unsigned long b, unsigned long addr)
{
*(volatile unsigned long*)addr = b;
}
/* 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 /* _H8300_IO_H */
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