302 lines
6.8 KiB
C
302 lines
6.8 KiB
C
|
/* MN10300 I/O port emulation and memory-mapped I/O
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
||
|
|
* Written by David Howells (dhowells@redhat.com)
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public Licence
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the Licence, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
#ifndef _ASM_IO_H
|
||
|
|
#define _ASM_IO_H
|
||
|
|
|
||
|
|
#include <asm/page.h> /* I/O is all done through memory accesses */
|
||
|
|
#include <asm/cpu-regs.h>
|
||
|
|
#include <asm/cacheflush.h>
|
||
|
|
|
||
|
|
#define mmiowb() do {} while (0)
|
||
|
|
|
||
|
|
/*****************************************************************************/
|
||
|
|
/*
|
||
|
|
* readX/writeX() are used to access memory mapped devices. On some
|
||
|
|
* architectures the memory mapped IO stuff needs to be accessed
|
||
|
|
* differently. On the x86 architecture, we just read/write the
|
||
|
|
* memory location directly.
|
||
|
|
*/
|
||
|
|
static inline u8 readb(const volatile void __iomem *addr)
|
||
|
|
{
|
||
|
|
return *(const volatile u8 *) addr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u16 readw(const volatile void __iomem *addr)
|
||
|
|
{
|
||
|
|
return *(const volatile u16 *) addr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u32 readl(const volatile void __iomem *addr)
|
||
|
|
{
|
||
|
|
return *(const volatile u32 *) addr;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define __raw_readb readb
|
||
|
|
#define __raw_readw readw
|
||
|
|
#define __raw_readl readl
|
||
|
|
|
||
|
|
#define readb_relaxed readb
|
||
|
|
#define readw_relaxed readw
|
||
|
|
#define readl_relaxed readl
|
||
|
|
|
||
|
|
static inline void writeb(u8 b, volatile void __iomem *addr)
|
||
|
|
{
|
||
|
|
*(volatile u8 *) addr = b;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void writew(u16 b, volatile void __iomem *addr)
|
||
|
|
{
|
||
|
|
*(volatile u16 *) addr = b;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void writel(u32 b, volatile void __iomem *addr)
|
||
|
|
{
|
||
|
|
*(volatile u32 *) addr = b;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define __raw_writeb writeb
|
||
|
|
#define __raw_writew writew
|
||
|
|
#define __raw_writel writel
|
||
|
|
|
||
|
|
/*****************************************************************************/
|
||
|
|
/*
|
||
|
|
* traditional input/output functions
|
||
|
|
*/
|
||
|
|
static inline u8 inb_local(unsigned long addr)
|
||
|
|
{
|
||
|
|
return readb((volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void outb_local(u8 b, unsigned long addr)
|
||
|
|
{
|
||
|
|
return writeb(b, (volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u8 inb(unsigned long addr)
|
||
|
|
{
|
||
|
|
return readb((volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u16 inw(unsigned long addr)
|
||
|
|
{
|
||
|
|
return readw((volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline u32 inl(unsigned long addr)
|
||
|
|
{
|
||
|
|
return readl((volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void outb(u8 b, unsigned long addr)
|
||
|
|
{
|
||
|
|
return writeb(b, (volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void outw(u16 b, unsigned long addr)
|
||
|
|
{
|
||
|
|
return writew(b, (volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void outl(u32 b, unsigned long addr)
|
||
|
|
{
|
||
|
|
return writel(b, (volatile void __iomem *) addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define inb_p(addr) inb(addr)
|
||
|
|
#define inw_p(addr) inw(addr)
|
||
|
|
#define inl_p(addr) inl(addr)
|
||
|
|
#define outb_p(x, addr) outb((x), (addr))
|
||
|
|
#define outw_p(x, addr) outw((x), (addr))
|
||
|
|
#define outl_p(x, addr) outl((x), (addr))
|
||
|
|
|
||
|
|
static inline void insb(unsigned long addr, void *buffer, int count)
|
||
|
|
{
|
||
|
|
if (count) {
|
||
|
|
u8 *buf = buffer;
|
||
|
|
do {
|
||
|
|
u8 x = inb(addr);
|
||
|
|
*buf++ = x;
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void insw(unsigned long addr, void *buffer, int count)
|
||
|
|
{
|
||
|
|
if (count) {
|
||
|
|
u16 *buf = buffer;
|
||
|
|
do {
|
||
|
|
u16 x = inw(addr);
|
||
|
|
*buf++ = x;
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void insl(unsigned long addr, void *buffer, int count)
|
||
|
|
{
|
||
|
|
if (count) {
|
||
|
|
u32 *buf = buffer;
|
||
|
|
do {
|
||
|
|
u32 x = inl(addr);
|
||
|
|
*buf++ = x;
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void outsb(unsigned long addr, const void *buffer, int count)
|
||
|
|
{
|
||
|
|
if (count) {
|
||
|
|
const u8 *buf = buffer;
|
||
|
|
do {
|
||
|
|
outb(*buf++, addr);
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void outsw(unsigned long addr, const void *buffer, int count)
|
||
|
|
{
|
||
|
|
if (count) {
|
||
|
|
const u16 *buf = buffer;
|
||
|
|
do {
|
||
|
|
outw(*buf++, addr);
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
extern void __outsl(unsigned long addr, const void *buffer, int count);
|
||
|
|
static inline void outsl(unsigned long addr, const void *buffer, int count)
|
||
|
|
{
|
||
|
|
if ((unsigned long) buffer & 0x3)
|
||
|
|
return __outsl(addr, buffer, count);
|
||
|
|
|
||
|
|
if (count) {
|
||
|
|
const u32 *buf = buffer;
|
||
|
|
do {
|
||
|
|
outl(*buf++, addr);
|
||
|
|
} while (--count);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ioread8(addr) readb(addr)
|
||
|
|
#define ioread16(addr) readw(addr)
|
||
|
|
#define ioread32(addr) readl(addr)
|
||
|
|
|
||
|
|
#define iowrite8(v, addr) writeb((v), (addr))
|
||
|
|
#define iowrite16(v, addr) writew((v), (addr))
|
||
|
|
#define iowrite32(v, addr) writel((v), (addr))
|
||
|
|
|
||
|
|
#define ioread8_rep(p, dst, count) \
|
||
|
|
insb((unsigned long) (p), (dst), (count))
|
||
|
|
#define ioread16_rep(p, dst, count) \
|
||
|
|
insw((unsigned long) (p), (dst), (count))
|
||
|
|
#define ioread32_rep(p, dst, count) \
|
||
|
|
insl((unsigned long) (p), (dst), (count))
|
||
|
|
|
||
|
|
#define iowrite8_rep(p, src, count) \
|
||
|
|
outsb((unsigned long) (p), (src), (count))
|
||
|
|
#define iowrite16_rep(p, src, count) \
|
||
|
|
outsw((unsigned long) (p), (src), (count))
|
||
|
|
#define iowrite32_rep(p, src, count) \
|
||
|
|
outsl((unsigned long) (p), (src), (count))
|
||
|
|
|
||
|
|
|
||
|
|
#define IO_SPACE_LIMIT 0xffffffff
|
||
|
|
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
|
||
|
|
#include <linux/vmalloc.h>
|
||
|
|
#define __io_virt(x) ((void *) (x))
|
||
|
|
|
||
|
|
/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
|
||
|
|
struct pci_dev;
|
||
|
|
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
|
||
|
|
static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Change virtual addresses to physical addresses and vv.
|
||
|
|
* These are pretty trivial
|
||
|
|
*/
|
||
|
|
static inline unsigned long virt_to_phys(volatile void *address)
|
||
|
|
{
|
||
|
|
return __pa(address);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void *phys_to_virt(unsigned long address)
|
||
|
|
{
|
||
|
|
return __va(address);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Change "struct page" to physical address.
|
||
|
|
*/
|
||
|
|
static inline void *__ioremap(unsigned long offset, unsigned long size,
|
||
|
|
unsigned long flags)
|
||
|
|
{
|
||
|
|
return (void *) offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void *ioremap(unsigned long offset, unsigned long size)
|
||
|
|
{
|
||
|
|
return (void *) offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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 (void *) (offset | 0x20000000);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ioremap_wc ioremap_nocache
|
||
|
|
|
||
|
|
static inline void iounmap(void *addr)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
|
||
|
|
{
|
||
|
|
return (void __iomem *) port;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void ioport_unmap(void __iomem *p)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#define xlate_dev_kmem_ptr(p) ((void *) (p))
|
||
|
|
#define xlate_dev_mem_ptr(p) ((void *) (p))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* PCI bus iomem addresses must be in the region 0x80000000-0x9fffffff
|
||
|
|
*/
|
||
|
|
static inline unsigned long virt_to_bus(volatile void *address)
|
||
|
|
{
|
||
|
|
return ((unsigned long) address) & ~0x20000000;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void *bus_to_virt(unsigned long address)
|
||
|
|
{
|
||
|
|
return (void *) address;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define page_to_bus page_to_phys
|
||
|
|
|
||
|
|
#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))
|
||
|
|
|
||
|
|
#endif /* __KERNEL__ */
|
||
|
|
|
||
|
|
#endif /* _ASM_IO_H */
|