/*
* Copyright 2004-2009 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef _BFIN_IO_H
#define _BFIN_IO_H
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
#include <linux/types.h>
#endif
#include <linux/compiler.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 bfin architecture, we just read/write the
* memory location directly.
*/
#ifndef __ASSEMBLY__
static inline unsigned char readb(const volatile void __iomem *addr)
{
unsigned int val;
int tmp;
__asm__ __volatile__ (
"cli %1;"
"NOP; NOP; SSYNC;"
"%0 = b [%2] (z);"
"sti %1;"
: "=d"(val), "=d"(tmp)
: "a"(addr)
);
return (unsigned char) val;
}
static inline unsigned short readw(const volatile void __iomem *addr)
{
unsigned int val;
int tmp;
__asm__ __volatile__ (
"cli %1;"
"NOP; NOP; SSYNC;"
"%0 = w [%2] (z);"
"sti %1;"
: "=d"(val), "=d"(tmp)
: "a"(addr)
);
return (unsigned short) val;
}
static inline unsigned int readl(const volatile void __iomem *addr)
{
unsigned int val;
int tmp;
__asm__ __volatile__ (
"cli %1;"
"NOP; NOP; SSYNC;"
"%0 = [%2];"
"sti %1;"
: "=d"(val), "=d"(tmp)
: "a"(addr)
);
return val;
}
#endif /* __ASSEMBLY__ */
#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
#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))
/* Convert "I/O port addresses" to actual addresses. i.e. ugly casts. */
#define __io(port) ((void *)(unsigned long)(port))
#define inb(port) readb(__io(port))
#define inw(port) readw(__io(port))
#define inl(port) readl(__io(port))
#define outb(x, port) writeb(x, __io(port))
#define outw(x, port) writew(x, __io(port))
#define outl(x, port) writel(x, __io(port))
#define inb_p(port) inb(__io(port))
#define inw_p(port) inw(__io(port))
#define inl_p(port) inl(__io(port))
#define outb_p(x, port) outb(x, __io(port))
#define outw_p(x, port) outw(x, __io(port))
#define outl_p(x, port) outl(x, __io(port))
#define ioread8_rep(a, d, c) readsb(a, d, c)
#define ioread16_rep(a, d, c) readsw(a, d, c)
#define ioread32_rep(a, d, c) readsl(a, d, c)
#define iowrite8_rep(a, s, c) writesb(a, s, c)
#define iowrite16_rep(a, s, c) writesw(a, s, c)
#define iowrite32_rep(a, s, c) writesl(a, s, c)
#define ioread8(x) readb(x)
#define ioread16(x) readw(x)
#define ioread32(x) readl(x)
#define iowrite8(val, x) writeb(val, x)
#define iowrite16(val, x) writew(val, x)
#define iowrite32(val, x) writel(val, x)
/**
* I/O write barrier
*
* Ensure ordering of I/O space writes. This will make sure that writes
* following the barrier will arrive after all previous writes.
*/
#define mmiowb() do { SSYNC(); wmb(); } while (0)
#define IO_SPACE_LIMIT 0xffffffff
/* Values for nocacheflag and cmode */
#define IOMAP_NOCACHE_SER 1
#ifndef __ASSEMBLY__
extern void outsb(unsigned long port, const void *addr, unsigned long count);
extern void outsw(unsigned long port, const void *addr, unsigned long count);
extern void outsw_8(unsigned long port, const void *addr, unsigned long count);
extern void outsl(unsigned long port, const void *addr, unsigned long count);
extern void insb(unsigned long port, void *addr, unsigned long count);
extern void insw(unsigned long port, void *addr, unsigned long count);
extern void insw_8(unsigned long port, void *addr, unsigned long count);
extern void insl(unsigned long port, void *addr, unsigned long count);
extern void insl_16(unsigned long port, void *addr, unsigned long count);
extern void dma_outsb(unsigned long port, const void *addr, unsigned short count);
extern void dma_outsw(unsigned long port, const void *addr, unsigned short count);
extern void dma_outsl(unsigned long port, const void *addr, unsigned short count);
extern void dma_insb(unsigned long port, void *addr, unsigned short count);
extern void dma_insw(unsigned long port, void *addr, unsigned short count);
extern void dma_insl(unsigned long port, void *addr, unsigned short count);
static inline void readsl(const void __iomem *addr, void *buf, int len)
{
insl((unsigned long)addr, buf, len);
}
static inline void readsw(const void __iomem *addr, void *buf, int len)
{
insw((unsigned long)addr, buf, len);
}
static inline void readsb(const void __iomem *addr, void *buf, int len)
{
insb((unsigned long)addr, buf, len);
}
static inline void writesl(const void __iomem *addr, const void *buf, int len)
{
outsl((unsigned long)addr, buf, len);
}
static inline void writesw(const void __iomem *addr, const void *buf, int len)
{
outsw((unsigned long)addr, buf, len);
}
static inline void writesb(const void __iomem *addr, const void *buf, int len)
{
outsb((unsigned long)addr, buf, len);
}
/*
* Map some physical address range into the kernel address space.
*/
static inline void __iomem *__ioremap(unsigned long physaddr, unsigned long size,
int cacheflag)
{
return (void __iomem *)physaddr;
}
/*
* Unmap a ioremap()ed region again
*/
static inline void iounmap(void *addr)
{
}
/*
* __iounmap unmaps nearly everything, so be careful
* it doesn't free currently pointer/page tables anymore but it
* wans't used anyway and might be added later.
*/
static inline void __iounmap(void *addr, unsigned long size)
{
}
/*
* Set new cache mode for some kernel address space.
* The caller must push data for that range itself, if such data may already
* be in the cache.
*/
static inline void kernel_set_cachemode(void *addr, unsigned long size,
int cmode)
{
}
static inline void __iomem *ioremap(unsigned long physaddr, unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
static inline void __iomem *ioremap_nocache(unsigned long physaddr,
unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
extern void blkfin_inv_cache_all(void);
#endif
#define ioport_map(port, nr) ((void __iomem*)(port))
#define ioport_unmap(addr)
/* Pages to physical address... */
#define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
#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 /* _BFIN_IO_H */
