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/*
* $Id: io.h,v 1.28 2000/09/17 05:12:00 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 virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
extern __inline__ unsigned flip_dword (unsigned d) {
return ((d&0xff)<<24) | (((d>>8)&0xff)<<16) | (((d>>16)&0xff)<<8)| ((d>>24)&0xff);
}
extern __inline__ unsigned short flip_word (unsigned short d) {
return ((d&0xff) << 8) | ((d>>8)&0xff);
}
/*
* Memory mapped I/O to PCI
*/
extern __inline__ unsigned long readb(unsigned long addr) {
return *(volatile unsigned char*)addr;
}
extern __inline__ unsigned long readw(unsigned long addr) {
return flip_word(*(volatile unsigned short*)addr);
}
extern __inline__ unsigned long readl(unsigned long addr) {
return flip_dword(*(volatile unsigned long*)addr);
}
extern __inline__ void writeb(unsigned char b, unsigned long addr) {
*(volatile unsigned char*)addr = b;
}
extern __inline__ void writew(unsigned short b, unsigned long addr) {
*(volatile unsigned short*)addr = flip_word(b);
}
extern __inline__ void writel(unsigned int b, unsigned long addr) {
*(volatile unsigned long*)addr = flip_dword(b);
}
/* Now the 'raw' versions. */
extern __inline__ unsigned long __raw_readb(unsigned long addr) {
return *(volatile unsigned char*)addr;
}
extern __inline__ unsigned long __raw_readw(unsigned long addr) {
return *(volatile unsigned short*)addr;
}
extern __inline__ unsigned long __raw_readl(unsigned long addr) {
return *(volatile unsigned long*)addr;
}
extern __inline__ void __raw_writeb(unsigned char b, unsigned long addr) {
*(volatile unsigned char*)addr = b;
}
extern __inline__ void __raw_writew(unsigned short b, unsigned long addr) {
*(volatile unsigned short*)addr = b;
}
extern __inline__ void __raw_writel(unsigned int b, unsigned long addr) {
*(volatile unsigned long*)addr = b;
}
/*
* 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(addr)
#define inb(addr) readb(addr)
#define inw(addr) readw(addr)
#define inl(addr) readl(addr)
#define inb_p(addr) readb(addr)
#define outb_local(b, addr) writeb(b, addr)
#define outb(b, addr) writeb(b, addr)
#define outw(b, addr) writew(b, addr)
#define outl(b, addr) writel(b, addr)
#define outb_p(b, addr) writeb(b, addr)
extern void outsb(unsigned long addr, const void *src, unsigned long cnt);
extern void outsw(unsigned long addr, const void *src, unsigned long cnt);
extern void outsl(unsigned long addr, const void *src, unsigned long cnt);
extern void insb(unsigned long addr, void *dst, unsigned long count);
extern void insw(unsigned long addr, void *dst, unsigned long count);
extern 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.
*/
extern __inline__ unsigned int _sbus_readb(unsigned long addr) {
return *(volatile unsigned char*)addr;
}
extern __inline__ unsigned int _sbus_readw(unsigned long addr) {
return *(volatile unsigned short*)addr;
}
extern __inline__ unsigned int _sbus_readl(unsigned long addr) {
return *(volatile unsigned long*)addr;
}
extern __inline__ void _sbus_writeb(unsigned char b, unsigned long addr) {
*(volatile unsigned char*)addr = b;
}
extern __inline__ void _sbus_writew(unsigned short b, unsigned long addr) {
*(volatile unsigned short*)addr = b;
}
extern __inline__ void _sbus_writel(unsigned int b, unsigned long addr) {
*(volatile unsigned long*)addr = b;
}
/*
* The only reason for #define's is to hide casts to unsigned long.
* XXX Rewrite drivers without structures for registers.
*/
#define sbus_readb(a) _sbus_readb((unsigned long)(a))
#define sbus_readw(a) _sbus_readw((unsigned long)(a))
#define sbus_readl(a) _sbus_readl((unsigned long)(a))
#define sbus_writeb(v, a) _sbus_writeb(v, (unsigned long)(a))
#define sbus_writew(v, a) _sbus_writew(v, (unsigned long)(a))
#define sbus_writel(v, a) _sbus_writel(v, (unsigned long)(a))
static inline void *sbus_memset_io(void *__dst, int c, __kernel_size_t n)
{
unsigned long dst = (unsigned long)__dst;
while(n--) {
sbus_writeb(c, dst);
dst++;
}
return (void *) dst;
}
#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 *ioremap(unsigned long offset, unsigned long size);
#define ioremap_nocache(X,Y) ioremap((X),(Y))
extern void iounmap(void *addr);
/* P3: talk davem into dropping "name" argument in favor of res->name */
/*
* Bus number may be in res->flags... somewhere.
*/
extern unsigned long sbus_ioremap(struct resource *res, unsigned long offset,
unsigned long size, char *name);
/* XXX Partial deallocations? I think not! */
extern void sbus_iounmap(unsigned long vaddr, unsigned long size);
#define virt_to_phys(x) __pa((unsigned long)(x))
#define phys_to_virt(x) __va((unsigned long)(x))
/*
* 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. */
#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
#endif /* !(__SPARC_IO_H) */
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