You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
290 lines
7.1 KiB
290 lines
7.1 KiB
/* io.h: FRV I/O operations
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This gets interesting when talking to the PCI bus - the CPU is in big endian
|
|
* mode, the PCI bus is little endian and the hardware in the middle can do
|
|
* byte swapping
|
|
*/
|
|
#ifndef _ASM_IO_H
|
|
#define _ASM_IO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/virtconvert.h>
|
|
#include <asm/string.h>
|
|
#include <asm/mb-regs.h>
|
|
#include <linux/delay.h>
|
|
|
|
/*
|
|
* swap functions are sometimes needed to interface little-endian hardware
|
|
*/
|
|
|
|
static inline unsigned short _swapw(unsigned short v)
|
|
{
|
|
return ((v << 8) | (v >> 8));
|
|
}
|
|
|
|
static inline unsigned long _swapl(unsigned long v)
|
|
{
|
|
return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
|
|
}
|
|
|
|
//#define __iormb() asm volatile("membar")
|
|
//#define __iowmb() asm volatile("membar")
|
|
|
|
#define __raw_readb(addr) __builtin_read8((void *) (addr))
|
|
#define __raw_readw(addr) __builtin_read16((void *) (addr))
|
|
#define __raw_readl(addr) __builtin_read32((void *) (addr))
|
|
|
|
#define __raw_writeb(datum, addr) __builtin_write8((void *) (addr), datum)
|
|
#define __raw_writew(datum, addr) __builtin_write16((void *) (addr), datum)
|
|
#define __raw_writel(datum, addr) __builtin_write32((void *) (addr), datum)
|
|
|
|
static inline void io_outsb(unsigned int addr, const void *buf, int len)
|
|
{
|
|
unsigned long __ioaddr = (unsigned long) addr;
|
|
const uint8_t *bp = buf;
|
|
|
|
while (len--)
|
|
__builtin_write8((volatile void __iomem *) __ioaddr, *bp++);
|
|
}
|
|
|
|
static inline void io_outsw(unsigned int addr, const void *buf, int len)
|
|
{
|
|
unsigned long __ioaddr = (unsigned long) addr;
|
|
const uint16_t *bp = buf;
|
|
|
|
while (len--)
|
|
__builtin_write16((volatile void __iomem *) __ioaddr, (*bp++));
|
|
}
|
|
|
|
extern void __outsl_ns(unsigned int addr, const void *buf, int len);
|
|
extern void __outsl_sw(unsigned int addr, const void *buf, int len);
|
|
static inline void __outsl(unsigned int addr, const void *buf, int len, int swap)
|
|
{
|
|
unsigned long __ioaddr = (unsigned long) addr;
|
|
|
|
if (!swap)
|
|
__outsl_ns(__ioaddr, buf, len);
|
|
else
|
|
__outsl_sw(__ioaddr, buf, len);
|
|
}
|
|
|
|
static inline void io_insb(unsigned long addr, void *buf, int len)
|
|
{
|
|
uint8_t *bp = buf;
|
|
|
|
while (len--)
|
|
*bp++ = __builtin_read8((volatile void __iomem *) addr);
|
|
}
|
|
|
|
static inline void io_insw(unsigned long addr, void *buf, int len)
|
|
{
|
|
uint16_t *bp = buf;
|
|
|
|
while (len--)
|
|
*bp++ = __builtin_read16((volatile void __iomem *) addr);
|
|
}
|
|
|
|
extern void __insl_ns(unsigned long addr, void *buf, int len);
|
|
extern void __insl_sw(unsigned long addr, void *buf, int len);
|
|
static inline void __insl(unsigned long addr, void *buf, int len, int swap)
|
|
{
|
|
if (!swap)
|
|
__insl_ns(addr, buf, len);
|
|
else
|
|
__insl_sw(addr, buf, len);
|
|
}
|
|
|
|
/*
|
|
* make the short names macros so specific devices
|
|
* can override them as required
|
|
*/
|
|
|
|
static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count)
|
|
{
|
|
memset((void __force *) addr, val, count);
|
|
}
|
|
|
|
static inline void memcpy_fromio(void *dst, volatile void __iomem *src, int count)
|
|
{
|
|
memcpy(dst, (void __force *) src, count);
|
|
}
|
|
|
|
static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count)
|
|
{
|
|
memcpy((void __force *) dst, src, count);
|
|
}
|
|
|
|
static inline uint8_t inb(unsigned long addr)
|
|
{
|
|
return __builtin_read8((void *)addr);
|
|
}
|
|
|
|
static inline uint16_t inw(unsigned long addr)
|
|
{
|
|
uint16_t ret = __builtin_read16((void *)addr);
|
|
|
|
if (__is_PCI_IO(addr))
|
|
ret = _swapw(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline uint32_t inl(unsigned long addr)
|
|
{
|
|
uint32_t ret = __builtin_read32((void *)addr);
|
|
|
|
if (__is_PCI_IO(addr))
|
|
ret = _swapl(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void outb(uint8_t datum, unsigned long addr)
|
|
{
|
|
__builtin_write8((void *)addr, datum);
|
|
}
|
|
|
|
static inline void outw(uint16_t datum, unsigned long addr)
|
|
{
|
|
if (__is_PCI_IO(addr))
|
|
datum = _swapw(datum);
|
|
__builtin_write16((void *)addr, datum);
|
|
}
|
|
|
|
static inline void outl(uint32_t datum, unsigned long addr)
|
|
{
|
|
if (__is_PCI_IO(addr))
|
|
datum = _swapl(datum);
|
|
__builtin_write32((void *)addr, datum);
|
|
}
|
|
|
|
#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) __outsl(a,b,l,0)
|
|
|
|
#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) __insl(a,b,l,0)
|
|
|
|
#define IO_SPACE_LIMIT 0xffffffff
|
|
|
|
static inline uint8_t readb(const volatile void __iomem *addr)
|
|
{
|
|
return __builtin_read8((volatile uint8_t __force *) addr);
|
|
}
|
|
|
|
static inline uint16_t readw(const volatile void __iomem *addr)
|
|
{
|
|
uint16_t ret = __builtin_read16((volatile uint16_t __force *)addr);
|
|
|
|
if (__is_PCI_MEM(addr))
|
|
ret = _swapw(ret);
|
|
return ret;
|
|
}
|
|
|
|
static inline uint32_t readl(const volatile void __iomem *addr)
|
|
{
|
|
uint32_t ret = __builtin_read32((volatile uint32_t __force *)addr);
|
|
|
|
if (__is_PCI_MEM(addr))
|
|
ret = _swapl(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void writeb(uint8_t datum, volatile void __iomem *addr)
|
|
{
|
|
__builtin_write8((volatile uint8_t __force *) addr, datum);
|
|
if (__is_PCI_MEM(addr))
|
|
__flush_PCI_writes();
|
|
}
|
|
|
|
static inline void writew(uint16_t datum, volatile void __iomem *addr)
|
|
{
|
|
if (__is_PCI_MEM(addr))
|
|
datum = _swapw(datum);
|
|
|
|
__builtin_write16((volatile uint16_t __force *) addr, datum);
|
|
if (__is_PCI_MEM(addr))
|
|
__flush_PCI_writes();
|
|
}
|
|
|
|
static inline void writel(uint32_t datum, volatile void __iomem *addr)
|
|
{
|
|
if (__is_PCI_MEM(addr))
|
|
datum = _swapl(datum);
|
|
|
|
__builtin_write32((volatile uint32_t __force *) addr, datum);
|
|
if (__is_PCI_MEM(addr))
|
|
__flush_PCI_writes();
|
|
}
|
|
|
|
|
|
/* 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 __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
|
|
extern void __iounmap(void __iomem *addr, unsigned long size);
|
|
|
|
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);
|
|
}
|
|
|
|
static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size)
|
|
{
|
|
return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
|
|
}
|
|
|
|
static inline void __iomem *ioremap_fullcache(unsigned long physaddr, unsigned long size)
|
|
{
|
|
return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
|
|
}
|
|
|
|
extern void iounmap(void __iomem *addr);
|
|
|
|
static inline void flush_write_buffers(void)
|
|
{
|
|
__asm__ __volatile__ ("membar" : : :"memory");
|
|
}
|
|
|
|
|
|
/*
|
|
* 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 /* _ASM_IO_H */
|
|
|