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/*
* arch/ubicom32/include/asm/io.h
* I/O memory accessor functions for Ubicom32 architecture.
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port 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.
*
* The Ubicom32 Linux Kernel Port is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*
* Ubicom32 implementation derived from (with many thanks):
* arch/m68knommu
* arch/blackfin
* arch/parisc
*/
#ifndef _ASM_UBICOM32_IO_H
#define _ASM_UBICOM32_IO_H
#ifdef __KERNEL__
#include <linux/string.h>
#include <linux/compiler.h>
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));
}
#ifndef CONFIG_PCI
#define readb(addr) \
({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })
#define readw(addr) \
({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })
#define readl(addr) \
({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
#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))
#else /*CONFIG_PCI */
#define PCI_CPU_REG_BASE (0x00000000UL) /* taking lower 2GB space */
#define PCI_DEV_REG_BASE (0x80000000UL)
#if PCI_CPU_REG_BASE > PCI_DEV_REG_BASE
#define IS_PCI_ADDRESS(x) (((unsigned int)(x)&(PCI_CPU_REG_BASE)) == 0)
#else
#define IS_PCI_ADDRESS(x) ((unsigned int)(x)&(PCI_DEV_REG_BASE))
#endif
extern unsigned int ubi32_pci_read_u32(const volatile void __iomem *addr);
extern unsigned short ubi32_pci_read_u16(const volatile void __iomem *addr);
extern unsigned char ubi32_pci_read_u8(const volatile void __iomem *addr);
extern void ubi32_pci_write_u32(unsigned int val, const volatile void __iomem *addr);
extern void ubi32_pci_write_u16(unsigned short val, const volatile void __iomem *addr);
extern void ubi32_pci_write_u8(unsigned char val, const volatile void __iomem *addr);
static inline unsigned char readb(const volatile void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
return ubi32_pci_read_u8(addr);
else
return (unsigned char)(*(volatile unsigned char *)addr);
}
static inline unsigned short readw(const volatile void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
return ubi32_pci_read_u16(addr);
else
return (unsigned short)(*(volatile unsigned short *)addr);
}
static inline unsigned int readl(const volatile void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
return ubi32_pci_read_u32(addr);
else
return (unsigned int)(*(volatile unsigned int *)addr);
}
static inline void writel(unsigned int val, volatile void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
ubi32_pci_write_u32(val, addr);
else
*(volatile unsigned int *)addr = val;
}
static inline void writew(unsigned short val, volatile void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
ubi32_pci_write_u16(val, addr);
else
*(volatile unsigned short *)addr = val;
}
static inline void writeb(unsigned char val, volatile void __iomem *addr)
{
if (IS_PCI_ADDRESS(addr))
ubi32_pci_write_u8(val, addr);
else
*(volatile unsigned char *)addr = val;
}
#endif
#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 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
*/
#ifndef CONFIG_PCI
#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))
#else
extern void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len);
extern void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len);
extern void memset_io(volatile void __iomem *addr, int val, size_t count);
#endif
#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)
#ifndef CONFIG_PCI
#define ioread8_rep(a,d,c) insb(a,d,c)
#define ioread16_rep(a,d,c) insw(a,d,c)
#define ioread32_rep(a,d,c) insl(a,d,c)
#define iowrite8_rep(a,s,c) outsb(a,s,c)
#define iowrite16_rep(a,s,c) outsw(a,s,c)
#define iowrite32_rep(a,s,c) outsl(a,s,c)
#else
extern void ioread8_rep(void __iomem *port, void *buf, unsigned long count);
extern void ioread16_rep(void __iomem *port, void *buf, unsigned long count);
extern void ioread32_rep(void __iomem *port, void *buf, unsigned long count);
extern void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count);
extern void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count);
#endif
#ifndef CONFIG_PCI
#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)
#else /*CONFIG_PCI */
extern unsigned char ioread8(void __iomem *addr);
extern unsigned short ioread16(void __iomem *addr);
extern unsigned int ioread32(void __iomem *addr);
extern void iowrite8(unsigned char val, void __iomem *addr);
extern void iowrite16(unsigned short val, void __iomem *addr);
extern void iowrite32(unsigned int val, void __iomem *addr);
#endif /* CONFIG_PCI */
#define IO_SPACE_LIMIT 0xffff
/* 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);
#define ioport_map(port, nr) ((void __iomem*)(port))
#define ioport_unmap(addr)
/* 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 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 /* _ASM_UBICOM32_IO_H */
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