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/*
* U-boot - io.h IO routines
*
* Copyright 2004-2009 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef _BLACKFIN_IO_H
#define _BLACKFIN_IO_H
#ifdef __KERNEL__
#include <linux/compiler.h>
#include <asm/blackfin.h>
static inline void sync(void)
{
SSYNC();
}
/*
* Given a physical address and a length, return a virtual address
* that can be used to access the memory range with the caching
* properties specified by "flags".
*/
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
static inline void *
map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
{
return (void *)paddr;
}
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
static inline phys_addr_t virt_to_phys(void * vaddr)
{
return (phys_addr_t)(vaddr);
}
/*
* 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 in_le32(port) inl(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 out_le32(x, port) outl(x, 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)
#define mmiowb() wmb()
#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);
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);
}
#if defined(CONFIG_STAMP_CF) || defined(CONFIG_BFIN_IDE)
/* This hack for CF/IDE needs to be addressed at some point */
extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
extern unsigned char cf_inb(volatile unsigned char *addr);
extern void cf_outb(unsigned char val, volatile unsigned char *addr);
#undef inb
#undef outb
#undef insw
#undef outsw
#define inb(addr) cf_inb((void *)(addr))
#define outb(x, addr) cf_outb((unsigned char)(x), (void *)(addr))
#define insw(port, addr, cnt) cf_insw((void *)(addr), (void *)(port), cnt)
#define outsw(port, addr, cnt) cf_outsw((void *)(port), (void *)(addr), cnt)
#endif
#endif
#endif /* __KERNEL__ */
#endif
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