io.h

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/*
 * Copyright (C) 2007-2009 Michal Simek <[email protected]>
 * 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 *)((port)))
#define outb(val, port)     writeb((val), (u8 *)((unsigned long)(port)))
#define inw(port)       readw((u16 *)((port)))
#define outw(val, port)     writew((val), (u16 *)((unsigned long)(port)))
#define inl(port)       readl((u32 *)((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 *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 */

static inline unsigned long __iomem virt_to_phys(volatile void *address)
{
    return __pa((unsigned long)address);
}

#define virt_to_bus virt_to_phys

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 */