Viewing file:  io.h (9.47 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2007-2009 PetaLogix
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _ASM_MICROBLAZE_IO_H
#define _ASM_MICROBLAZE_IO_H
#include <asm/byteorder.h>
#include <asm/page.h>
#include <linux/types.h>
#include <linux/mm.h> /* Get struct page {...} */
#include <asm-generic/iomap.h>
#ifndef CONFIG_PCI
#define _IO_BASE 0
#define _ISA_MEM_BASE 0
#define PCI_DRAM_OFFSET 0
#else
#define _IO_BASE isa_io_base
#define _ISA_MEM_BASE isa_mem_base
#define PCI_DRAM_OFFSET pci_dram_offset
#endif
extern unsigned long isa_io_base;
extern unsigned long pci_io_base;
extern unsigned long pci_dram_offset;
extern resource_size_t isa_mem_base;
#define IO_SPACE_LIMIT (0xFFFFFFFF)
/* the following is needed to support PCI with some drivers */
#define mmiowb()
static inline unsigned char __raw_readb(const volatile void __iomem *addr)
{
return *(volatile unsigned char __force *)addr;
}
static inline unsigned short __raw_readw(const volatile void __iomem *addr)
{
return *(volatile unsigned short __force *)addr;
}
static inline unsigned int __raw_readl(const volatile void __iomem *addr)
{
return *(volatile unsigned int __force *)addr;
}
static inline unsigned long __raw_readq(const volatile void __iomem *addr)
{
return *(volatile unsigned long __force *)addr;
}
static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr)
{
*(volatile unsigned char __force *)addr = v;
}
static inline void __raw_writew(unsigned short v, volatile void __iomem *addr)
{
*(volatile unsigned short __force *)addr = v;
}
static inline void __raw_writel(unsigned int v, volatile void __iomem *addr)
{
*(volatile unsigned int __force *)addr = v;
}
static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
{
*(volatile unsigned long __force *)addr = v;
}
/*
* read (readb, readw, readl, readq) and write (writeb, writew,
* writel, writeq) accessors are for PCI and thus little endian.
* Linux 2.4 for Microblaze had this wrong.
*/
static inline unsigned char readb(const volatile void __iomem *addr)
{
return *(volatile unsigned char __force *)addr;
}
static inline unsigned short readw(const volatile void __iomem *addr)
{
return le16_to_cpu(*(volatile unsigned short __force *)addr);
}
static inline unsigned int readl(const volatile void __iomem *addr)
{
return le32_to_cpu(*(volatile unsigned int __force *)addr);
}
static inline void writeb(unsigned char v, volatile void __iomem *addr)
{
*(volatile unsigned char __force *)addr = v;
}
static inline void writew(unsigned short v, volatile void __iomem *addr)
{
*(volatile unsigned short __force *)addr = cpu_to_le16(v);
}
static inline void writel(unsigned int v, volatile void __iomem *addr)
{
*(volatile unsigned int __force *)addr = cpu_to_le32(v);
}
/* ioread and iowrite variants. thease are for now same as __raw_
* variants of accessors. we might check for endianess in the feature
*/
#define ioread8(addr) __raw_readb((u8 *)(addr))
#define ioread16(addr) __raw_readw((u16 *)(addr))
#define ioread32(addr) __raw_readl((u32 *)(addr))
#define iowrite8(v, addr) __raw_writeb((u8)(v), (u8 *)(addr))
#define iowrite16(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
#define iowrite32(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
#define ioread16be(addr) __raw_readw((u16 *)(addr))
#define ioread32be(addr) __raw_readl((u32 *)(addr))
#define iowrite16be(v, addr) __raw_writew((u16)(v), (u16 *)(addr))
#define iowrite32be(v, addr) __raw_writel((u32)(v), (u32 *)(addr))
/* These are the definitions for the x86 IO instructions
* inb/inw/inl/outb/outw/outl, the "string" versions
* insb/insw/insl/outsb/outsw/outsl, and the "pausing" versions
* inb_p/inw_p/...
* The macros don't do byte-swapping.
*/
#define inb(port) readb((u8 *)((unsigned long)(port)))
#define outb(val, port) writeb((val), (u8 *)((unsigned long)(port)))
#define inw(port) readw((u16 *)((unsigned long)(port)))
#define outw(val, port) writew((val), (u16 *)((unsigned long)(port)))
#define inl(port) readl((u32 *)((unsigned long)(port)))
#define outl(val, port) writel((val), (u32 *)((unsigned long)(port)))
#define inb_p(port) inb((port))
#define outb_p(val, port) outb((val), (port))
#define inw_p(port) inw((port))
#define outw_p(val, port) outw((val), (port))
#define inl_p(port) inl((port))
#define outl_p(val, port) outl((val), (port))
#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))
#ifdef CONFIG_MMU
#define phys_to_virt(addr) ((void *)__phys_to_virt(addr))
#define virt_to_phys(addr) ((unsigned long)__virt_to_phys(addr))
#define virt_to_bus(addr) ((unsigned long)__virt_to_phys(addr))
#define page_to_bus(page) (page_to_phys(page))
#define bus_to_virt(addr) (phys_to_virt(addr))
extern void iounmap(void __iomem *addr);
/*extern void *__ioremap(phys_addr_t address, unsigned long size,
unsigned long flags);*/
extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
#define ioremap_writethrough(addr, size) ioremap((addr), (size))
#define ioremap_nocache(addr, size) ioremap((addr), (size))
#define ioremap_fullcache(addr, size) ioremap((addr), (size))
#else /* CONFIG_MMU */
/**
* virt_to_phys - map virtual addresses to physical
* @address: address to remap
*
* The returned physical address is the physical (CPU) mapping for
* the memory address given. It is only valid to use this function on
* addresses directly mapped or allocated via kmalloc.
*
* This function does not give bus mappings for DMA transfers. In
* almost all conceivable cases a device driver should not be using
* this function
*/
static inline unsigned long __iomem virt_to_phys(volatile void *address)
{
return __pa((unsigned long)address);
}
#define virt_to_bus virt_to_phys
/**
* phys_to_virt - map physical address to virtual
* @address: address to remap
*
* The returned virtual address is a current CPU mapping for
* the memory address given. It is only valid to use this function on
* addresses that have a kernel mapping
*
* This function does not handle bus mappings for DMA transfers. In
* almost all conceivable cases a device driver should not be using
* this function
*/
static inline void *phys_to_virt(unsigned long address)
{
return (void *)__va(address);
}
#define bus_to_virt(a) phys_to_virt(a)
static inline void __iomem *__ioremap(phys_addr_t address, unsigned long size,
unsigned long flags)
{
return (void *)address;
}
#define ioremap(physaddr, size) ((void __iomem *)(unsigned long)(physaddr))
#define iounmap(addr) ((void)0)
#define ioremap_nocache(physaddr, size) ioremap(physaddr, size)
#endif /* CONFIG_MMU */
/*
* 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
/*
* Big Endian
*/
#define out_be32(a, v) __raw_writel((v), (void __iomem __force *)(a))
#define out_be16(a, v) __raw_writew((v), (a))
#define in_be32(a) __raw_readl((const void __iomem __force *)(a))
#define in_be16(a) __raw_readw(a)
#define writel_be(v, a) out_be32((__force unsigned *)a, v)
#define readl_be(a) in_be32((__force unsigned *)a)
/*
* Little endian
*/
#define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (a))
#define out_le16(a, v) __raw_writew(__cpu_to_le16(v), (a))
#define in_le32(a) __le32_to_cpu(__raw_readl(a))
#define in_le16(a) __le16_to_cpu(__raw_readw(a))
/* Byte ops */
#define out_8(a, v) __raw_writeb((v), (a))
#define in_8(a) __raw_readb(a)
#define mmiowb()
#define ioport_map(port, nr) ((void __iomem *)(port))
#define ioport_unmap(addr)
/* from asm-generic/io.h */
#ifndef insb
static inline void insb(unsigned long addr, void *buffer, int count)
{
if (count) {
u8 *buf = buffer;
do {
u8 x = inb(addr);
*buf++ = x;
} while (--count);
}
}
#endif
#ifndef insw
static inline void insw(unsigned long addr, void *buffer, int count)
{
if (count) {
u16 *buf = buffer;
do {
u16 x = inw(addr);
*buf++ = x;
} while (--count);
}
}
#endif
#ifndef insl
static inline void insl(unsigned long addr, void *buffer, int count)
{
if (count) {
u32 *buf = buffer;
do {
u32 x = inl(addr);
*buf++ = x;
} while (--count);
}
}
#endif
#ifndef outsb
static inline void outsb(unsigned long addr, const void *buffer, int count)
{
if (count) {
const u8 *buf = buffer;
do {
outb(*buf++, addr);
} while (--count);
}
}
#endif
#ifndef outsw
static inline void outsw(unsigned long addr, const void *buffer, int count)
{
if (count) {
const u16 *buf = buffer;
do {
outw(*buf++, addr);
} while (--count);
}
}
#endif
#ifndef outsl
static inline void outsl(unsigned long addr, const void *buffer, int count)
{
if (count) {
const u32 *buf = buffer;
do {
outl(*buf++, addr);
} while (--count);
}
}
#endif
#define ioread8_rep(p, dst, count) \
insb((unsigned long) (p), (dst), (count))
#define ioread16_rep(p, dst, count) \
insw((unsigned long) (p), (dst), (count))
#define ioread32_rep(p, dst, count) \
insl((unsigned long) (p), (dst), (count))
#define iowrite8_rep(p, src, count) \
outsb((unsigned long) (p), (src), (count))
#define iowrite16_rep(p, src, count) \
outsw((unsigned long) (p), (src), (count))
#define iowrite32_rep(p, src, count) \
outsl((unsigned long) (p), (src), (count))
#endif /* _ASM_MICROBLAZE_IO_H */
|