128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
/*
|
|
* include/asm-s390/io.h
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
|
|
*
|
|
* Derived from "include/asm-i386/io.h"
|
|
*/
|
|
|
|
#ifndef _S390_IO_H
|
|
#define _S390_IO_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/vmalloc.h>
|
|
#include <asm/page.h>
|
|
|
|
#define IO_SPACE_LIMIT 0xffffffff
|
|
|
|
#define __io_virt(x) ((void *)(PAGE_OFFSET | (unsigned long)(x)))
|
|
|
|
/*
|
|
* Change virtual addresses to physical addresses and vv.
|
|
* These are pretty trivial
|
|
*/
|
|
static inline unsigned long virt_to_phys(volatile void * address)
|
|
{
|
|
unsigned long real_address;
|
|
asm volatile(
|
|
#ifndef __s390x__
|
|
" lra %0,0(%1)\n"
|
|
#else /* __s390x__ */
|
|
" lrag %0,0(%1)\n"
|
|
#endif /* __s390x__ */
|
|
" jz 0f\n"
|
|
" la %0,0\n"
|
|
"0:"
|
|
: "=a" (real_address) : "a" (address) : "cc");
|
|
return real_address;
|
|
}
|
|
|
|
static inline void * phys_to_virt(unsigned long address)
|
|
{
|
|
return __io_virt(address);
|
|
}
|
|
|
|
extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
|
|
|
|
static inline void * ioremap (unsigned long offset, unsigned long size)
|
|
{
|
|
return __ioremap(offset, size, 0);
|
|
}
|
|
|
|
/*
|
|
* This one maps high address device memory and turns off caching for that area.
|
|
* it's useful if some control registers are in such an area and write combining
|
|
* or read caching is not desirable:
|
|
*/
|
|
static inline void * ioremap_nocache (unsigned long offset, unsigned long size)
|
|
{
|
|
return __ioremap(offset, size, 0);
|
|
}
|
|
|
|
extern void iounmap(void *addr);
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* readX/writeX() are used to access memory mapped devices. On some
|
|
* architectures the memory mapped IO stuff needs to be accessed
|
|
* differently.
|
|
*/
|
|
|
|
#define readb(addr) (*(volatile unsigned char *) __io_virt(addr))
|
|
#define readw(addr) (*(volatile unsigned short *) __io_virt(addr))
|
|
#define readl(addr) (*(volatile unsigned int *) __io_virt(addr))
|
|
#define readq(addr) (*(volatile unsigned long long *) __io_virt(addr))
|
|
|
|
#define readb_relaxed(addr) readb(addr)
|
|
#define readw_relaxed(addr) readw(addr)
|
|
#define readl_relaxed(addr) readl(addr)
|
|
#define readq_relaxed(addr) readq(addr)
|
|
#define __raw_readb readb
|
|
#define __raw_readw readw
|
|
#define __raw_readl readl
|
|
#define __raw_readq readq
|
|
|
|
#define writeb(b,addr) (*(volatile unsigned char *) __io_virt(addr) = (b))
|
|
#define writew(b,addr) (*(volatile unsigned short *) __io_virt(addr) = (b))
|
|
#define writel(b,addr) (*(volatile unsigned int *) __io_virt(addr) = (b))
|
|
#define writeq(b,addr) (*(volatile unsigned long long *) __io_virt(addr) = (b))
|
|
#define __raw_writeb writeb
|
|
#define __raw_writew writew
|
|
#define __raw_writel writel
|
|
#define __raw_writeq writeq
|
|
|
|
#define memset_io(a,b,c) memset(__io_virt(a),(b),(c))
|
|
#define memcpy_fromio(a,b,c) memcpy((a),__io_virt(b),(c))
|
|
#define memcpy_toio(a,b,c) memcpy(__io_virt(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)
|
|
|
|
#define mmiowb() do { } while (0)
|
|
|
|
/*
|
|
* 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
|