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#ifndef _PPC_IO_H

#define _PPC_IO_H

/* Define the particulars of outb/outw/outl "instructions" */

#define SLOW_DOWN_IO

#ifndef PCI_DRAM_OFFSET

#define PCI_DRAM_OFFSET  0x80000000

#endif

#ifndef KERNELBASE

#define KERNELBASE 0x90000000

#endif

/*

 * The PCI bus is inherently Little-Endian.  The PowerPC is being

 * run Big-Endian.  Thus all values which cross the [PCI] barrier

 * must be endian-adjusted.  Also, the local DRAM has a different

 * address from the PCI point of view, thus buffer addresses also

 * have to be modified [mapped] appropriately.

 */

extern inline unsigned long virt_to_bus(volatile void * address)

{

        if (address == (void *)0) return 0;

        return ((unsigned long)((long)address - KERNELBASE + PCI_DRAM_OFFSET));

}

extern inline void * bus_to_virt(unsigned long address)

{

        if (address == 0) return 0;

        return ((void *)(address - PCI_DRAM_OFFSET + KERNELBASE));

}

/* #define virt_to_bus(a) ((unsigned long)(((char *)a==(char *) 0) ? ((char *)0) \

                        : ((char *)((long)a - KERNELBASE + PCI_DRAM_OFFSET))))

#define bus_to_virt(a) ((void *) (((char *)a==(char *)0) ? ((char *)0) \

                        : ((char *)((long)a - PCI_DRAM_OFFSET + KERNELBASE))))

*/

#define readb(addr) (*(volatile unsigned char *) (addr))

#define readw(addr) (*(volatile unsigned short *) (addr))

#define readl(addr) (*(volatile unsigned int *) (addr))

#define writeb(b,addr) ((*(volatile unsigned char *) (addr)) = (b))

#define writew(b,addr) ((*(volatile unsigned short *) (addr)) = (b))

#define writel(b,addr) ((*(volatile unsigned int *) (addr)) = (b))

/*

 * Change virtual addresses to physical addresses and vv.

 * These are trivial on the 1:1 Linux/i386 mapping (but if we ever

 * make the kernel segment mapped at 0, we need to do translation

 * on the i386 as well)

 */

extern inline unsigned long virt_to_phys(volatile void * address)

{

        return (unsigned long) address;

}

extern inline void * phys_to_virt(unsigned long address)

{

        return (void *) address;

}

/* from arch/ppc/kernel/port_io.c

 *               -- Cort

 */

unsigned char inb(int port);

unsigned short inw(int port);

unsigned long inl(int port);

unsigned char outb(unsigned char val,int port);

unsigned short outw(unsigned short val,int port);

unsigned long outl(unsigned long val,int port);

void outsl(int port, long *ptr, int len);

static inline unsigned char  inb_p(int port) {return (inb(port)); }

static inline unsigned short inw_p(int port) {return (inw(port)); }

static inline unsigned long  inl_p(int port) {return (inl(port)); }

static inline unsigned char  outb_p(unsigned char val,int port) { return (outb(val,port)); }

static inline unsigned short outw_p(unsigned short val,int port) { return (outw(val,port)); }

static inline unsigned long  outl_p(unsigned long val,int port) { return (outl(val,port)); }

#endif