Linux-2.6.12-rc2

[thirdparty/kernel/stable.git] / include / asm-ppc64 / io.h

#ifndef _PPC64_IO_H
#define _PPC64_IO_H

/* 
 * 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.
 */

#include <linux/config.h>
#include <linux/compiler.h>
#include <asm/page.h>
#include <asm/byteorder.h>
#ifdef CONFIG_PPC_ISERIES 
#include <asm/iSeries/iSeries_io.h>
#endif  
#include <asm/memory.h>
#include <asm/delay.h>

#include <asm-generic/iomap.h>

#define __ide_mm_insw(p, a, c) _insw_ns((volatile u16 *)(p), (a), (c))
#define __ide_mm_insl(p, a, c) _insl_ns((volatile u32 *)(p), (a), (c))
#define __ide_mm_outsw(p, a, c) _outsw_ns((volatile u16 *)(p), (a), (c))
#define __ide_mm_outsl(p, a, c) _outsl_ns((volatile u32 *)(p), (a), (c))


#define SIO_CONFIG_RA   0x398
#define SIO_CONFIG_RD   0x399

#define SLOW_DOWN_IO

extern unsigned long isa_io_base;
extern unsigned long pci_io_base;
extern unsigned long io_page_mask;

#define MAX_ISA_PORT 0x10000

#define _IO_IS_VALID(port) ((port) >= MAX_ISA_PORT || (1 << (port>>PAGE_SHIFT)) \
                            & io_page_mask)

#ifdef CONFIG_PPC_ISERIES
/* __raw_* accessors aren't supported on iSeries */
#define __raw_readb(addr)       { BUG(); 0; }
#define __raw_readw(addr)       { BUG(); 0; }
#define __raw_readl(addr)       { BUG(); 0; }
#define __raw_readq(addr)       { BUG(); 0; }
#define __raw_writeb(v, addr)   { BUG(); 0; }
#define __raw_writew(v, addr)   { BUG(); 0; }
#define __raw_writel(v, addr)   { BUG(); 0; }
#define __raw_writeq(v, addr)   { BUG(); 0; }
#define readb(addr)             iSeries_Read_Byte(addr)
#define readw(addr)             iSeries_Read_Word(addr)
#define readl(addr)             iSeries_Read_Long(addr)
#define writeb(data, addr)      iSeries_Write_Byte((data),(addr))
#define writew(data, addr)      iSeries_Write_Word((data),(addr))
#define writel(data, addr)      iSeries_Write_Long((data),(addr))
#define memset_io(a,b,c)        iSeries_memset_io((a),(b),(c))
#define memcpy_fromio(a,b,c)    iSeries_memcpy_fromio((a), (b), (c))
#define memcpy_toio(a,b,c)      iSeries_memcpy_toio((a), (b), (c))

#define inb(addr)               readb(((void __iomem *)(long)(addr)))
#define inw(addr)               readw(((void __iomem *)(long)(addr)))
#define inl(addr)               readl(((void __iomem *)(long)(addr)))
#define outb(data,addr)         writeb(data,((void __iomem *)(long)(addr)))
#define outw(data,addr)         writew(data,((void __iomem *)(long)(addr)))
#define outl(data,addr)         writel(data,((void __iomem *)(long)(addr)))
/*
 * The *_ns versions below don't do byte-swapping.
 * Neither do the standard versions now, these are just here
 * for older code.
 */
#define insw_ns(port, buf, ns)  _insw_ns((u16 *)((port)+pci_io_base), (buf), (ns))
#define insl_ns(port, buf, nl)  _insl_ns((u32 *)((port)+pci_io_base), (buf), (nl))
#else

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;
}
#define readb(addr)             eeh_readb(addr)
#define readw(addr)             eeh_readw(addr)
#define readl(addr)             eeh_readl(addr)
#define readq(addr)             eeh_readq(addr)
#define writeb(data, addr)      eeh_writeb((data), (addr))
#define writew(data, addr)      eeh_writew((data), (addr))
#define writel(data, addr)      eeh_writel((data), (addr))
#define writeq(data, addr)      eeh_writeq((data), (addr))
#define memset_io(a,b,c)        eeh_memset_io((a),(b),(c))
#define memcpy_fromio(a,b,c)    eeh_memcpy_fromio((a),(b),(c))
#define memcpy_toio(a,b,c)      eeh_memcpy_toio((a),(b),(c))
#define inb(port)               eeh_inb((unsigned long)port)
#define outb(val, port)         eeh_outb(val, (unsigned long)port)
#define inw(port)               eeh_inw((unsigned long)port)
#define outw(val, port)         eeh_outw(val, (unsigned long)port)
#define inl(port)               eeh_inl((unsigned long)port)
#define outl(val, port)         eeh_outl(val, (unsigned long)port)

/*
 * The insw/outsw/insl/outsl macros don't do byte-swapping.
 * They are only used in practice for transferring buffers which
 * are arrays of bytes, and byte-swapping is not appropriate in
 * that case.  - paulus */
#define insb(port, buf, ns)     eeh_insb((port), (buf), (ns))
#define insw(port, buf, ns)     eeh_insw_ns((port), (buf), (ns))
#define insl(port, buf, nl)     eeh_insl_ns((port), (buf), (nl))
#define insw_ns(port, buf, ns)  eeh_insw_ns((port), (buf), (ns))
#define insl_ns(port, buf, nl)  eeh_insl_ns((port), (buf), (nl))

#define outsb(port, buf, ns)  _outsb((u8 *)((port)+pci_io_base), (buf), (ns))
#define outsw(port, buf, ns)  _outsw_ns((u16 *)((port)+pci_io_base), (buf), (ns))
#define outsl(port, buf, nl)  _outsl_ns((u32 *)((port)+pci_io_base), (buf), (nl))

#endif

#define readb_relaxed(addr) readb(addr)
#define readw_relaxed(addr) readw(addr)
#define readl_relaxed(addr) readl(addr)
#define readq_relaxed(addr) readq(addr)

extern void _insb(volatile u8 *port, void *buf, int ns);
extern void _outsb(volatile u8 *port, const void *buf, int ns);
extern void _insw(volatile u16 *port, void *buf, int ns);
extern void _outsw(volatile u16 *port, const void *buf, int ns);
extern void _insl(volatile u32 *port, void *buf, int nl);
extern void _outsl(volatile u32 *port, const void *buf, int nl);
extern void _insw_ns(volatile u16 *port, void *buf, int ns);
extern void _outsw_ns(volatile u16 *port, const void *buf, int ns);
extern void _insl_ns(volatile u32 *port, void *buf, int nl);
extern void _outsl_ns(volatile u32 *port, const void *buf, int nl);

#define mmiowb()

/*
 * output pause versions need a delay at least for the
 * w83c105 ide controller in a p610.
 */
#define inb_p(port)             inb(port)
#define outb_p(val, port)       (udelay(1), outb((val), (port)))
#define inw_p(port)             inw(port)
#define outw_p(val, port)       (udelay(1), outw((val), (port)))
#define inl_p(port)             inl(port)
#define outl_p(val, port)       (udelay(1), outl((val), (port)))

/*
 * The *_ns versions below don't do byte-swapping.
 * Neither do the standard versions now, these are just here
 * for older code.
 */
#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+pci_io_base), (buf), (ns))
#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+pci_io_base), (buf), (nl))


#define IO_SPACE_LIMIT ~(0UL)


#ifdef __KERNEL__
extern int __ioremap_explicit(unsigned long p_addr, unsigned long v_addr,
                              unsigned long size, unsigned long flags);
extern void __iomem *__ioremap(unsigned long address, unsigned long size,
                       unsigned long flags);

/**
 * ioremap     -   map bus memory into CPU space
 * @address:   bus address of the memory
 * @size:      size of the resource to map
 *
 * ioremap performs a platform specific sequence of operations to
 * make bus memory CPU accessible via the readb/readw/readl/writeb/
 * writew/writel functions and the other mmio helpers. The returned
 * address is not guaranteed to be usable directly as a virtual
 * address.
 */
extern void __iomem *ioremap(unsigned long address, unsigned long size);

#define ioremap_nocache(addr, size)     ioremap((addr), (size))
extern int iounmap_explicit(volatile void __iomem *addr, unsigned long size);
extern void iounmap(volatile void __iomem *addr);
extern void __iomem * reserve_phb_iospace(unsigned long size);

/**
 *      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 virt_to_phys(volatile void * address)
{
        return __pa((unsigned long)address);
}

/**
 *      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);
}

/*
 * Change "struct page" to physical address.
 */
#define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)

/* We do NOT want virtual merging, it would put too much pressure on
 * our iommu allocator. Instead, we want drivers to be smart enough
 * to coalesce sglists that happen to have been mapped in a contiguous
 * way by the iommu
 */
#define BIO_VMERGE_BOUNDARY     0

#endif /* __KERNEL__ */

static inline void iosync(void)
{
        __asm__ __volatile__ ("sync" : : : "memory");
}

/* Enforce in-order execution of data I/O. 
 * No distinction between read/write on PPC; use eieio for all three.
 */
#define iobarrier_rw() eieio()
#define iobarrier_r()  eieio()
#define iobarrier_w()  eieio()

/*
 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 * These routines do not perform EEH-related I/O address translation,
 * and should not be used directly by device drivers.  Use inb/readb
 * instead.
 */
static inline int in_8(const volatile unsigned char __iomem *addr)
{
        int ret;

        __asm__ __volatile__("lbz%U1%X1 %0,%1; twi 0,%0,0; isync"
                             : "=r" (ret) : "m" (*addr));
        return ret;
}

static inline void out_8(volatile unsigned char __iomem *addr, int val)
{
        __asm__ __volatile__("stb%U0%X0 %1,%0; sync"
                             : "=m" (*addr) : "r" (val));
}

static inline int in_le16(const volatile unsigned short __iomem *addr)
{
        int ret;

        __asm__ __volatile__("lhbrx %0,0,%1; twi 0,%0,0; isync"
                             : "=r" (ret) : "r" (addr), "m" (*addr));
        return ret;
}

static inline int in_be16(const volatile unsigned short __iomem *addr)
{
        int ret;

        __asm__ __volatile__("lhz%U1%X1 %0,%1; twi 0,%0,0; isync"
                             : "=r" (ret) : "m" (*addr));
        return ret;
}

static inline void out_le16(volatile unsigned short __iomem *addr, int val)
{
        __asm__ __volatile__("sthbrx %1,0,%2; sync"
                             : "=m" (*addr) : "r" (val), "r" (addr));
}

static inline void out_be16(volatile unsigned short __iomem *addr, int val)
{
        __asm__ __volatile__("sth%U0%X0 %1,%0; sync"
                             : "=m" (*addr) : "r" (val));
}

static inline unsigned in_le32(const volatile unsigned __iomem *addr)
{
        unsigned ret;

        __asm__ __volatile__("lwbrx %0,0,%1; twi 0,%0,0; isync"
                             : "=r" (ret) : "r" (addr), "m" (*addr));
        return ret;
}

static inline unsigned in_be32(const volatile unsigned __iomem *addr)
{
        unsigned ret;

        __asm__ __volatile__("lwz%U1%X1 %0,%1; twi 0,%0,0; isync"
                             : "=r" (ret) : "m" (*addr));
        return ret;
}

static inline void out_le32(volatile unsigned __iomem *addr, int val)
{
        __asm__ __volatile__("stwbrx %1,0,%2; sync" : "=m" (*addr)
                             : "r" (val), "r" (addr));
}

static inline void out_be32(volatile unsigned __iomem *addr, int val)
{
        __asm__ __volatile__("stw%U0%X0 %1,%0; sync"
                             : "=m" (*addr) : "r" (val));
}

static inline unsigned long in_le64(const volatile unsigned long __iomem *addr)
{
        unsigned long tmp, ret;

        __asm__ __volatile__(
                             "ld %1,0(%2)\n"
                             "twi 0,%1,0\n"
                             "isync\n"
                             "rldimi %0,%1,5*8,1*8\n"
                             "rldimi %0,%1,3*8,2*8\n"
                             "rldimi %0,%1,1*8,3*8\n"
                             "rldimi %0,%1,7*8,4*8\n"
                             "rldicl %1,%1,32,0\n"
                             "rlwimi %0,%1,8,8,31\n"
                             "rlwimi %0,%1,24,16,23\n"
                             : "=r" (ret) , "=r" (tmp) : "b" (addr) , "m" (*addr));
        return ret;
}

static inline unsigned long in_be64(const volatile unsigned long __iomem *addr)
{
        unsigned long ret;

        __asm__ __volatile__("ld%U1%X1 %0,%1; twi 0,%0,0; isync"
                             : "=r" (ret) : "m" (*addr));
        return ret;
}

static inline void out_le64(volatile unsigned long __iomem *addr, unsigned long val)
{
        unsigned long tmp;

        __asm__ __volatile__(
                             "rldimi %0,%1,5*8,1*8\n"
                             "rldimi %0,%1,3*8,2*8\n"
                             "rldimi %0,%1,1*8,3*8\n"
                             "rldimi %0,%1,7*8,4*8\n"
                             "rldicl %1,%1,32,0\n"
                             "rlwimi %0,%1,8,8,31\n"
                             "rlwimi %0,%1,24,16,23\n"
                             "std %0,0(%3)\n"
                             "sync"
                             : "=&r" (tmp) , "=&r" (val) : "1" (val) , "b" (addr) , "m" (*addr));
}

static inline void out_be64(volatile unsigned long __iomem *addr, unsigned long val)
{
        __asm__ __volatile__("std%U0%X0 %1,%0; sync" : "=m" (*addr) : "r" (val));
}

#ifndef CONFIG_PPC_ISERIES 
#include <asm/eeh.h>
#endif

#ifdef __KERNEL__

/**
 *      check_signature         -       find BIOS signatures
 *      @io_addr: mmio address to check
 *      @signature:  signature block
 *      @length: length of signature
 *
 *      Perform a signature comparison with the mmio address io_addr. This
 *      address should have been obtained by ioremap.
 *      Returns 1 on a match.
 */
static inline int check_signature(const volatile void __iomem * io_addr,
        const unsigned char *signature, int length)
{
        int retval = 0;
#ifndef CONFIG_PPC_ISERIES 
        do {
                if (readb(io_addr) != *signature)
                        goto out;
                io_addr++;
                signature++;
                length--;
        } while (length);
        retval = 1;
out:
#endif
        return retval;
}

/* Nothing to do */

#define dma_cache_inv(_start,_size)             do { } while (0)
#define dma_cache_wback(_start,_size)           do { } while (0)
#define dma_cache_wback_inv(_start,_size)       do { } while (0)

/* Check of existence of legacy devices */
extern int check_legacy_ioport(unsigned long base_port);


/*
 * 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 /* _PPC64_IO_H */