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#ifndef _M68K_IO_H
#define _M68K_IO_H
#ifdef __KERNEL__
#include <linux/config.h> /* CONFIG_ATARI, CONFIG_HADES */
#include <asm/byteorder.h>
#ifdef CONFIG_ATARI
#include <asm/atarihw.h>
#define SLOW_DOWN_IO do { if (MACH_IS_ATARI) MFPDELAY(); } while (0)
#endif
/*
* 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))
#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))
#define inb_p(addr) readb(addr)
#define inb(addr) readb(addr)
#define outb(x,addr) ((void) writeb(x,addr))
#define outb_p(x,addr) outb(x,addr)
/*
* Change virtual addresses to physical addresses and vv.
*/
extern unsigned long mm_vtop(unsigned long addr) __attribute__ ((const));
extern unsigned long mm_ptov(unsigned long addr) __attribute__ ((const));
extern inline unsigned long virt_to_phys(volatile void * address)
{
return mm_vtop((unsigned long)address);
}
extern inline void * phys_to_virt(unsigned long address)
{
return (void *) mm_ptov(address);
}
/*
* IO bus memory addresses are 1:1 with the physical address,
* except on the PCI bus of the Hades.
*/
#ifdef CONFIG_HADES
#define virt_to_bus(a) (virt_to_phys(a) + (MACH_IS_HADES ? 0x80000000 : 0))
#define bus_to_virt(a) (phys_to_virt((a) - (MACH_IS_HADES ? 0x80000000 : 0)))
#else
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
#endif
#endif /* __KERNEL__ */
#endif /* _M68K_IO_H */
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