microblaze_v8: io.h IO operations
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
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Michal Simek
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arch/microblaze/include/asm/io.h
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209
arch/microblaze/include/asm/io.h
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/*
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#ifndef _ASM_MICROBLAZE_IO_H
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#define _ASM_MICROBLAZE_IO_H
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#include <asm/byteorder.h>
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#include <asm/page.h>
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#include <linux/types.h>
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#include <asm/page.h>
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#define IO_SPACE_LIMIT (0xFFFFFFFF)
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static inline unsigned char __raw_readb(const volatile void __iomem *addr)
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{
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return *(volatile unsigned char __force *)addr;
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}
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static inline unsigned short __raw_readw(const volatile void __iomem *addr)
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{
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return *(volatile unsigned short __force *)addr;
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}
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static inline unsigned int __raw_readl(const volatile void __iomem *addr)
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{
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return *(volatile unsigned int __force *)addr;
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}
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static inline unsigned long __raw_readq(const volatile void __iomem *addr)
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{
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return *(volatile unsigned long __force *)addr;
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}
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static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
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{
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*(volatile unsigned char __force *)addr = v;
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}
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static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
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{
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*(volatile unsigned short __force *)addr = v;
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}
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static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
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{
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*(volatile unsigned int __force *)addr = v;
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}
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static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
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{
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*(volatile unsigned long __force *)addr = v;
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}
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/*
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* read (readb, readw, readl, readq) and write (writeb, writew,
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* writel, writeq) accessors are for PCI and thus littel endian.
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* Linux 2.4 for Microblaze had this wrong.
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*/
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static inline unsigned char readb(const volatile void __iomem *addr)
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{
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return *(volatile unsigned char __force *)addr;
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}
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static inline unsigned short readw(const volatile void __iomem *addr)
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{
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return le16_to_cpu(*(volatile unsigned short __force *)addr);
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}
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static inline unsigned int readl(const volatile void __iomem *addr)
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{
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return le32_to_cpu(*(volatile unsigned int __force *)addr);
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}
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static inline void writeb(unsigned char v, volatile void __iomem *addr)
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{
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*(volatile unsigned char __force *)addr = v;
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}
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static inline void writew(unsigned short v, volatile void __iomem *addr)
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{
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*(volatile unsigned short __force *)addr = cpu_to_le16(v);
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}
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static inline void writel(unsigned int v, volatile void __iomem *addr)
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{
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*(volatile unsigned int __force *)addr = cpu_to_le32(v);
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}
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/* ioread and iowrite variants. thease are for now same as __raw_
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* variants of accessors. we might check for endianess in the feature
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*/
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#define ioread8(addr) __raw_readb((u8 *)(addr))
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#define ioread16(addr) __raw_readw((u16 *)(addr))
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#define ioread32(addr) __raw_readl((u32 *)(addr))
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#define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr))
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#define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
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#define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
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/* These are the definitions for the x86 IO instructions
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* inb/inw/inl/outb/outw/outl, the "string" versions
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* insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
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* inb_p/inw_p/...
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* The macros don't do byte-swapping.
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*/
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#define inb(port) readb((u8 *)((port)))
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#define outb(val, port) writeb((val), (u8 *)((unsigned long)(port)))
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#define inw(port) readw((u16 *)((port)))
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#define outw(val, port) writew((val), (u16 *)((unsigned long)(port)))
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#define inl(port) readl((u32 *)((port)))
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#define outl(val, port) writel((val), (u32 *)((unsigned long)(port)))
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#define inb_p(port) inb((port))
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#define outb_p(val, port) outb((val), (port))
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#define inw_p(port) inw((port))
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#define outw_p(val, port) outw((val), (port))
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#define inl_p(port) inl((port))
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#define outl_p(val, port) outl((val), (port))
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#define memset_io(a, b, c) memset((void *)(a), (b), (c))
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#define memcpy_fromio(a, b, c) memcpy((a), (void *)(b), (c))
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#define memcpy_toio(a, b, c) memcpy((void *)(a), (b), (c))
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/**
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* virt_to_phys - map virtual addresses to physical
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* @address: address to remap
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*
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* The returned physical address is the physical (CPU) mapping for
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* the memory address given. It is only valid to use this function on
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* addresses directly mapped or allocated via kmalloc.
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*
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* This function does not give bus mappings for DMA transfers. In
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* almost all conceivable cases a device driver should not be using
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* this function
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*/
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static inline unsigned long __iomem virt_to_phys(volatile void *address)
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{
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return __pa((unsigned long)address);
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}
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#define virt_to_bus virt_to_phys
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/**
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* phys_to_virt - map physical address to virtual
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* @address: address to remap
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*
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* The returned virtual address is a current CPU mapping for
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* the memory address given. It is only valid to use this function on
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* addresses that have a kernel mapping
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*
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* This function does not handle bus mappings for DMA transfers. In
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* almost all conceivable cases a device driver should not be using
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* this function
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*/
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static inline void *phys_to_virt(unsigned long address)
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{
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return (void *)__va(address);
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}
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#define bus_to_virt(a) phys_to_virt(a)
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static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
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unsigned long flags)
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{
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return (void *)address;
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}
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#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
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#define iounmap(addr) ((void)0)
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#define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
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/*
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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* access
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*/
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#define xlate_dev_mem_ptr(p) __va(p)
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/*
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* Convert a virtual cached pointer to an uncached pointer
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*/
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#define xlate_dev_kmem_ptr(p) p
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/*
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* Big Endian
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*/
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#define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
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#define out_be16(a, v) __raw_writew((v), (a))
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#define in_be32(a) __raw_readl((const void __iomem __force *)(a))
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#define in_be16(a) __raw_readw(a)
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/*
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* Little endian
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*/
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#define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a));
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#define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
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#define in_le32(a) __le32_to_cpu(__raw_readl(a))
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#define in_le16(a) __le16_to_cpu(__raw_readw(a))
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/* Byte ops */
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#define out_8(a, v) __raw_writeb((v), (a))
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#define in_8(a) __raw_readb(a)
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/* FIXME */
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static inline void __iomem *ioport_map(unsigned long port, unsigned int len)
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{
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return (void __iomem *) (port);
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}
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static inline void ioport_unmap(void __iomem *addr)
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{
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/* Nothing to do */
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}
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#endif /* _ASM_MICROBLAZE_IO_H */
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