291 lines
7.5 KiB
C
291 lines
7.5 KiB
C
/*
|
|
* $Id: io.h,v 1.30 2001/12/21 01:23:21 davem Exp $
|
|
*/
|
|
#ifndef __SPARC_IO_H
|
|
#define __SPARC_IO_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/ioport.h> /* struct resource */
|
|
|
|
#include <asm/page.h> /* IO address mapping routines need this */
|
|
#include <asm/system.h>
|
|
|
|
#define page_to_phys(page) (((page) - mem_map) << PAGE_SHIFT)
|
|
|
|
static inline u32 flip_dword (u32 l)
|
|
{
|
|
return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff);
|
|
}
|
|
|
|
static inline u16 flip_word (u16 w)
|
|
{
|
|
return ((w&0xff) << 8) | ((w>>8)&0xff);
|
|
}
|
|
|
|
#define mmiowb()
|
|
|
|
/*
|
|
* Memory mapped I/O to PCI
|
|
*/
|
|
|
|
static inline u8 __raw_readb(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u8 *)addr;
|
|
}
|
|
|
|
static inline u16 __raw_readw(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u16 *)addr;
|
|
}
|
|
|
|
static inline u32 __raw_readl(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u32 *)addr;
|
|
}
|
|
|
|
static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u8 *)addr = b;
|
|
}
|
|
|
|
static inline void __raw_writew(u16 w, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u16 *)addr = w;
|
|
}
|
|
|
|
static inline void __raw_writel(u32 l, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u32 *)addr = l;
|
|
}
|
|
|
|
static inline u8 __readb(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u8 *)addr;
|
|
}
|
|
|
|
static inline u16 __readw(const volatile void __iomem *addr)
|
|
{
|
|
return flip_word(*(__force volatile u16 *)addr);
|
|
}
|
|
|
|
static inline u32 __readl(const volatile void __iomem *addr)
|
|
{
|
|
return flip_dword(*(__force volatile u32 *)addr);
|
|
}
|
|
|
|
static inline void __writeb(u8 b, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u8 *)addr = b;
|
|
}
|
|
|
|
static inline void __writew(u16 w, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u16 *)addr = flip_word(w);
|
|
}
|
|
|
|
static inline void __writel(u32 l, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u32 *)addr = flip_dword(l);
|
|
}
|
|
|
|
#define readb(__addr) __readb(__addr)
|
|
#define readw(__addr) __readw(__addr)
|
|
#define readl(__addr) __readl(__addr)
|
|
#define readb_relaxed(__addr) readb(__addr)
|
|
#define readw_relaxed(__addr) readw(__addr)
|
|
#define readl_relaxed(__addr) readl(__addr)
|
|
|
|
#define writeb(__b, __addr) __writeb((__b),(__addr))
|
|
#define writew(__w, __addr) __writew((__w),(__addr))
|
|
#define writel(__l, __addr) __writel((__l),(__addr))
|
|
|
|
/*
|
|
* I/O space operations
|
|
*
|
|
* Arrangement on a Sun is somewhat complicated.
|
|
*
|
|
* First of all, we want to use standard Linux drivers
|
|
* for keyboard, PC serial, etc. These drivers think
|
|
* they access I/O space and use inb/outb.
|
|
* On the other hand, EBus bridge accepts PCI *memory*
|
|
* cycles and converts them into ISA *I/O* cycles.
|
|
* Ergo, we want inb & outb to generate PCI memory cycles.
|
|
*
|
|
* If we want to issue PCI *I/O* cycles, we do this
|
|
* with a low 64K fixed window in PCIC. This window gets
|
|
* mapped somewhere into virtual kernel space and we
|
|
* can use inb/outb again.
|
|
*/
|
|
#define inb_local(__addr) __readb((void __iomem *)(unsigned long)(__addr))
|
|
#define inb(__addr) __readb((void __iomem *)(unsigned long)(__addr))
|
|
#define inw(__addr) __readw((void __iomem *)(unsigned long)(__addr))
|
|
#define inl(__addr) __readl((void __iomem *)(unsigned long)(__addr))
|
|
|
|
#define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
|
|
#define outb(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
|
|
#define outw(__w, __addr) __writew(__w, (void __iomem *)(unsigned long)(__addr))
|
|
#define outl(__l, __addr) __writel(__l, (void __iomem *)(unsigned long)(__addr))
|
|
|
|
#define inb_p(__addr) inb(__addr)
|
|
#define outb_p(__b, __addr) outb(__b, __addr)
|
|
#define inw_p(__addr) inw(__addr)
|
|
#define outw_p(__w, __addr) outw(__w, __addr)
|
|
#define inl_p(__addr) inl(__addr)
|
|
#define outl_p(__l, __addr) outl(__l, __addr)
|
|
|
|
void outsb(unsigned long addr, const void *src, unsigned long cnt);
|
|
void outsw(unsigned long addr, const void *src, unsigned long cnt);
|
|
void outsl(unsigned long addr, const void *src, unsigned long cnt);
|
|
void insb(unsigned long addr, void *dst, unsigned long count);
|
|
void insw(unsigned long addr, void *dst, unsigned long count);
|
|
void insl(unsigned long addr, void *dst, unsigned long count);
|
|
|
|
#define IO_SPACE_LIMIT 0xffffffff
|
|
|
|
/*
|
|
* SBus accessors.
|
|
*
|
|
* SBus has only one, memory mapped, I/O space.
|
|
* We do not need to flip bytes for SBus of course.
|
|
*/
|
|
static inline u8 _sbus_readb(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u8 *)addr;
|
|
}
|
|
|
|
static inline u16 _sbus_readw(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u16 *)addr;
|
|
}
|
|
|
|
static inline u32 _sbus_readl(const volatile void __iomem *addr)
|
|
{
|
|
return *(__force volatile u32 *)addr;
|
|
}
|
|
|
|
static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u8 *)addr = b;
|
|
}
|
|
|
|
static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u16 *)addr = w;
|
|
}
|
|
|
|
static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
|
|
{
|
|
*(__force volatile u32 *)addr = l;
|
|
}
|
|
|
|
/*
|
|
* The only reason for #define's is to hide casts to unsigned long.
|
|
*/
|
|
#define sbus_readb(__addr) _sbus_readb(__addr)
|
|
#define sbus_readw(__addr) _sbus_readw(__addr)
|
|
#define sbus_readl(__addr) _sbus_readl(__addr)
|
|
#define sbus_writeb(__b, __addr) _sbus_writeb(__b, __addr)
|
|
#define sbus_writew(__w, __addr) _sbus_writew(__w, __addr)
|
|
#define sbus_writel(__l, __addr) _sbus_writel(__l, __addr)
|
|
|
|
static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n)
|
|
{
|
|
while(n--) {
|
|
sbus_writeb(c, __dst);
|
|
__dst++;
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
_memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
|
|
{
|
|
volatile void __iomem *d = dst;
|
|
|
|
while (n--) {
|
|
writeb(c, d);
|
|
d++;
|
|
}
|
|
}
|
|
|
|
#define memset_io(d,c,sz) _memset_io(d,c,sz)
|
|
|
|
static inline void
|
|
_memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
|
|
{
|
|
char *d = dst;
|
|
|
|
while (n--) {
|
|
char tmp = readb(src);
|
|
*d++ = tmp;
|
|
src++;
|
|
}
|
|
}
|
|
|
|
#define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
|
|
|
|
static inline void
|
|
_memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
|
|
{
|
|
const char *s = src;
|
|
volatile void __iomem *d = dst;
|
|
|
|
while (n--) {
|
|
char tmp = *s++;
|
|
writeb(tmp, d);
|
|
d++;
|
|
}
|
|
}
|
|
|
|
#define memcpy_toio(d,s,sz) _memcpy_toio(d,s,sz)
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Bus number may be embedded in the higher bits of the physical address.
|
|
* This is why we have no bus number argument to ioremap().
|
|
*/
|
|
extern void __iomem *ioremap(unsigned long offset, unsigned long size);
|
|
#define ioremap_nocache(X,Y) ioremap((X),(Y))
|
|
extern void iounmap(volatile void __iomem *addr);
|
|
|
|
/*
|
|
* Bus number may be in res->flags... somewhere.
|
|
*/
|
|
extern void __iomem *sbus_ioremap(struct resource *res, unsigned long offset,
|
|
unsigned long size, char *name);
|
|
extern void sbus_iounmap(volatile void __iomem *vaddr, unsigned long size);
|
|
|
|
|
|
/*
|
|
* At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
|
|
* so rtc_port is static in it. This should not change unless a new
|
|
* hardware pops up.
|
|
*/
|
|
#define RTC_PORT(x) (rtc_port + (x))
|
|
#define RTC_ALWAYS_BCD 0
|
|
|
|
/* Nothing to do */
|
|
/* P3: Only IDE DMA may need these. XXX Verify that it still does... */
|
|
|
|
#define dma_cache_inv(_start,_size) do { } while (0)
|
|
#define dma_cache_wback(_start,_size) do { } while (0)
|
|
#define dma_cache_wback_inv(_start,_size) do { } while (0)
|
|
|
|
#endif
|
|
|
|
#define __ARCH_HAS_NO_PAGE_ZERO_MAPPED 1
|
|
|
|
/*
|
|
* 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 /* !(__SPARC_IO_H) */
|