Subversion Repositories or1k

#ifndef _OR1K_IO_H

#define _OR1K_IO_H

/*

 * readX/writeX() are used to access memory mapped devices. On some

 * architectures the memory mapped IO stuff needs to be accessed

 * differently. On the m68k architecture, we just read/write the

 * memory location directly.

 */

/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates

 * two accesses to memory, which may be undesireable for some devices.

 */

#define readb(addr) \

    ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })

#define readw(addr) \

    ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })

#define readl(addr) \

    ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })

#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))

#if 0

/* There is no difference between I/O and memory on 68k, these are the same */

#define inb(addr) \

    ({ unsigned char __v = (*(volatile unsigned char *) (addr)); printk("inb(%x)=%02x\n", (addr), __v); __v; })

#define inw(addr) \

    ({ unsigned short __v = (*(volatile unsigned short *) (addr)); printk("inw(%x)=%04x\n", (addr), __v); __v; })

#define inl(addr) \

    ({ unsigned int __v = (*(volatile unsigned int *) (addr)); printk("inl(%x)=%08x\n", (addr), __v); __v; })

#define outb(b,addr) { ((*(volatile unsigned char *) (addr)) = (b)) ; printk("outb(%x)=%02x\n", (addr), (b)); }

#define outw(b,addr) { ((*(volatile unsigned short *) (addr)) = (b)) ; printk("outw(%x)=%04x\n", (addr), (b)); }

#define outl(b,addr) { ((*(volatile unsigned int *) (addr)) = (b)) ; printk("outl(%x)=%08x\n", (addr), (b)); }

#else

/* There is no difference between I/O and memory on 68k, these are the same */

#define inb(addr) \

    ({ unsigned char __v = (*(volatile unsigned char *) (addr)); __v; })

#define inw(addr) \

    ({ unsigned short __v = (*(volatile unsigned short *) (addr)); __v; })

#define inl(addr) \

    ({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })

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

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

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

#endif

#define inb_p   inb

#define inw_p   inw

#define outb_p  outb

#define outw_p  outw

static inline void outsb(void *addr, void *buf, int len)

{

        volatile unsigned char *ap = (volatile unsigned char *) addr;

        unsigned char *bp = (unsigned char *) buf;

        while (len--)

                *ap = *bp++;

}

static inline void outsw(void *addr, void *buf, int len)

{

        volatile unsigned short *ap = (volatile unsigned short *) addr;

        unsigned short *bp = (unsigned short *) buf;

        while (len--)

                *ap = *bp++;

}

static inline void outsl(void *addr, void *buf, int len)

{

        volatile unsigned int *ap = (volatile unsigned int *) addr;

        unsigned int *bp = (unsigned int *) buf;

        while (len--)

                *ap = *bp++;

}

static inline void insb(void *addr, void *buf, int len)

{

        volatile unsigned char *ap = (volatile unsigned char *) addr;

        unsigned char *bp = (unsigned char *) buf;

        while (len--)

                *bp++ = *ap;

}

static inline void insw(void *addr, void *buf, int len)

{

        volatile unsigned short *ap = (volatile unsigned short *) addr;

        unsigned short *bp = (unsigned short *) buf;

        while (len--)

                *bp++ = *ap;

}

static inline void insl(void *addr, void *buf, int len)

{

        volatile unsigned int *ap = (volatile unsigned int *) addr;

        unsigned int *bp = (unsigned int *) buf;

        while (len--)

                *bp++ = *ap;

}

/*

 * 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 unsigned long mm_vtop(unsigned long addr);

extern unsigned long mm_ptov(unsigned long addr);

extern inline unsigned long virt_to_phys(volatile void * address)

{

        return (unsigned long) mm_vtop((unsigned long)address);

}

extern inline void * phys_to_virt(unsigned long address)

{

        return (void *) mm_ptov(address);

}

/*

 * IO bus memory addresses are also 1:1 with the physical address

 */

#define virt_to_bus virt_to_phys

#define bus_to_virt phys_to_virt

#endif /* _OR1K_IO_H */