io.h

来自「Linux Kernel 2.6.9 for OMAP1710」· C头文件 代码 · 共 489 行

/* $Id: io.h,v 1.47 2001/12/13 10:36:02 davem Exp $ */
#ifndef __SPARC64_IO_H
#define __SPARC64_IO_H

#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/types.h>

#include <asm/page.h>      /* IO address mapping routines need this */
#include <asm/system.h>
#include <asm/asi.h>

/* PC crapola... */
#define __SLOW_DOWN_IO	do { } while (0)
#define SLOW_DOWN_IO	do { } while (0)

extern unsigned long virt_to_bus_not_defined_use_pci_map(volatile void *addr);
#define virt_to_bus virt_to_bus_not_defined_use_pci_map
extern unsigned long bus_to_virt_not_defined_use_pci_map(volatile void *addr);
#define bus_to_virt bus_to_virt_not_defined_use_pci_map

/* BIO layer definitions. */
extern unsigned long kern_base, kern_size;
#define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
#define BIO_VMERGE_BOUNDARY	8192

/* Different PCI controllers we support have their PCI MEM space
 * mapped to an either 2GB (Psycho) or 4GB (Sabre) aligned area,
 * so need to chop off the top 33 or 32 bits.
 */
extern unsigned long pci_memspace_mask;

#define bus_dvma_to_mem(__vaddr) ((__vaddr) & pci_memspace_mask)

static __inline__ u8 _inb(unsigned long addr)
{
	u8 ret;

	__asm__ __volatile__("lduba\t[%1] %2, %0\t/* pci_inb */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));

	return ret;
}

static __inline__ u16 _inw(unsigned long addr)
{
	u16 ret;

	__asm__ __volatile__("lduha\t[%1] %2, %0\t/* pci_inw */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));

	return ret;
}

static __inline__ u32 _inl(unsigned long addr)
{
	u32 ret;

	__asm__ __volatile__("lduwa\t[%1] %2, %0\t/* pci_inl */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));

	return ret;
}

static __inline__ void _outb(u8 b, unsigned long addr)
{
	__asm__ __volatile__("stba\t%r0, [%1] %2\t/* pci_outb */"
			     : /* no outputs */
			     : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

static __inline__ void _outw(u16 w, unsigned long addr)
{
	__asm__ __volatile__("stha\t%r0, [%1] %2\t/* pci_outw */"
			     : /* no outputs */
			     : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

static __inline__ void _outl(u32 l, unsigned long addr)
{
	__asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_outl */"
			     : /* no outputs */
			     : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

#define inb(__addr)		(_inb((unsigned long)(__addr)))
#define inw(__addr)		(_inw((unsigned long)(__addr)))
#define inl(__addr)		(_inl((unsigned long)(__addr)))
#define outb(__b, __addr)	(_outb((u8)(__b), (unsigned long)(__addr)))
#define outw(__w, __addr)	(_outw((u16)(__w), (unsigned long)(__addr)))
#define outl(__l, __addr)	(_outl((u32)(__l), (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)

extern void outsb(void __iomem *addr, const void *src, unsigned long count);
extern void outsw(void __iomem *addr, const void *src, unsigned long count);
extern void outsl(void __iomem *addr, const void *src, unsigned long count);
extern void insb(void __iomem *addr, void *dst, unsigned long count);
extern void insw(void __iomem *addr, void *dst, unsigned long count);
extern void insl(void __iomem *addr, void *dst, unsigned long count);
#define ioread8_rep(a,d,c)	insb(a,d,c)
#define ioread16_rep(a,d,c)	insw(a,d,c)
#define ioread32_rep(a,d,c)	insl(a,d,c)
#define iowrite8_rep(a,s,c)	outsb(a,s,c)
#define iowrite16_rep(a,s,c)	outsw(a,s,c)
#define iowrite32_rep(a,s,c)	outsl(a,s,c)

/* Memory functions, same as I/O accesses on Ultra. */
static inline u8 _readb(void __iomem *addr)
{	u8 ret;

	__asm__ __volatile__("lduba\t[%1] %2, %0\t/* pci_readb */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
	return ret;
}

static inline u16 _readw(void __iomem *addr)
{	u16 ret;

	__asm__ __volatile__("lduha\t[%1] %2, %0\t/* pci_readw */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));

	return ret;
}

static inline u32 _readl(void __iomem *addr)
{	u32 ret;

	__asm__ __volatile__("lduwa\t[%1] %2, %0\t/* pci_readl */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));

	return ret;
}

static inline u64 _readq(void __iomem *addr)
{	u64 ret;

	__asm__ __volatile__("ldxa\t[%1] %2, %0\t/* pci_readq */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));

	return ret;
}

static inline void _writeb(u8 b, void __iomem *addr)
{
	__asm__ __volatile__("stba\t%r0, [%1] %2\t/* pci_writeb */"
			     : /* no outputs */
			     : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

static inline void _writew(u16 w, void __iomem *addr)
{
	__asm__ __volatile__("stha\t%r0, [%1] %2\t/* pci_writew */"
			     : /* no outputs */
			     : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

static inline void _writel(u32 l, void __iomem *addr)
{
	__asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_writel */"
			     : /* no outputs */
			     : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

static inline void _writeq(u64 q, void __iomem *addr)
{
	__asm__ __volatile__("stxa\t%r0, [%1] %2\t/* pci_writeq */"
			     : /* no outputs */
			     : "Jr" (q), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
}

#define readb(__addr)		_readb(__addr)
#define readw(__addr)		_readw(__addr)
#define readl(__addr)		_readl(__addr)
#define readq(__addr)		_readq(__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 writeb(__b, __addr)	_writeb(__b, __addr)
#define writew(__w, __addr)	_writew(__w, __addr)
#define writel(__l, __addr)	_writel(__l, __addr)
#define writeq(__q, __addr)	_writeq(__q, __addr)

/* Now versions without byte-swapping. */
static __inline__ u8 _raw_readb(unsigned long addr)
{
	u8 ret;

	__asm__ __volatile__("lduba\t[%1] %2, %0\t/* pci_raw_readb */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static __inline__ u16 _raw_readw(unsigned long addr)
{
	u16 ret;

	__asm__ __volatile__("lduha\t[%1] %2, %0\t/* pci_raw_readw */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static __inline__ u32 _raw_readl(unsigned long addr)
{
	u32 ret;

	__asm__ __volatile__("lduwa\t[%1] %2, %0\t/* pci_raw_readl */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static __inline__ u64 _raw_readq(unsigned long addr)
{
	u64 ret;

	__asm__ __volatile__("ldxa\t[%1] %2, %0\t/* pci_raw_readq */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static __inline__ void _raw_writeb(u8 b, unsigned long addr)
{
	__asm__ __volatile__("stba\t%r0, [%1] %2\t/* pci_raw_writeb */"
			     : /* no outputs */
			     : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static __inline__ void _raw_writew(u16 w, unsigned long addr)
{
	__asm__ __volatile__("stha\t%r0, [%1] %2\t/* pci_raw_writew */"
			     : /* no outputs */
			     : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static __inline__ void _raw_writel(u32 l, unsigned long addr)
{
	__asm__ __volatile__("stwa\t%r0, [%1] %2\t/* pci_raw_writel */"
			     : /* no outputs */
			     : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static __inline__ void _raw_writeq(u64 q, unsigned long addr)
{
	__asm__ __volatile__("stxa\t%r0, [%1] %2\t/* pci_raw_writeq */"
			     : /* no outputs */
			     : "Jr" (q), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

#define __raw_readb(__addr)		(_raw_readb((unsigned long)(__addr)))
#define __raw_readw(__addr)		(_raw_readw((unsigned long)(__addr)))
#define __raw_readl(__addr)		(_raw_readl((unsigned long)(__addr)))
#define __raw_readq(__addr)		(_raw_readq((unsigned long)(__addr)))
#define __raw_writeb(__b, __addr)	(_raw_writeb((u8)(__b), (unsigned long)(__addr)))
#define __raw_writew(__w, __addr)	(_raw_writew((u16)(__w), (unsigned long)(__addr)))
#define __raw_writel(__l, __addr)	(_raw_writel((u32)(__l), (unsigned long)(__addr)))
#define __raw_writeq(__q, __addr)	(_raw_writeq((u64)(__q), (unsigned long)(__addr)))

/* Valid I/O Space regions are anywhere, because each PCI bus supported
 * can live in an arbitrary area of the physical address range.
 */
#define IO_SPACE_LIMIT 0xffffffffffffffffUL

/* Now, SBUS variants, only difference from PCI is that we do
 * not use little-endian ASIs.
 */
static inline u8 _sbus_readb(void __iomem *addr)
{
	u8 ret;

	__asm__ __volatile__("lduba\t[%1] %2, %0\t/* sbus_readb */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline u16 _sbus_readw(void __iomem *addr)
{
	u16 ret;

	__asm__ __volatile__("lduha\t[%1] %2, %0\t/* sbus_readw */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline u32 _sbus_readl(void __iomem *addr)
{
	u32 ret;

	__asm__ __volatile__("lduwa\t[%1] %2, %0\t/* sbus_readl */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline u64 _sbus_readq(void __iomem *addr)
{
	u64 ret;

	__asm__ __volatile__("ldxa\t[%1] %2, %0\t/* sbus_readq */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline void _sbus_writeb(u8 b, void __iomem *addr)
{
	__asm__ __volatile__("stba\t%r0, [%1] %2\t/* sbus_writeb */"
			     : /* no outputs */
			     : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static inline void _sbus_writew(u16 w, void __iomem *addr)
{
	__asm__ __volatile__("stha\t%r0, [%1] %2\t/* sbus_writew */"
			     : /* no outputs */
			     : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static inline void _sbus_writel(u32 l, void __iomem *addr)
{
	__asm__ __volatile__("stwa\t%r0, [%1] %2\t/* sbus_writel */"
			     : /* no outputs */
			     : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static inline void _sbus_writeq(u64 l, void __iomem *addr)
{
	__asm__ __volatile__("stxa\t%r0, [%1] %2\t/* sbus_writeq */"
			     : /* no outputs */
			     : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

#define sbus_readb(__addr)		_sbus_readb(__addr)
#define sbus_readw(__addr)		_sbus_readw(__addr)
#define sbus_readl(__addr)		_sbus_readl(__addr)
#define sbus_readq(__addr)		_sbus_readq(__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)
#define sbus_writeq(__l, __addr)	_sbus_writeq(__l, __addr)

static inline void __iomem*_sbus_memset_io(void __iomem *dst, int c,
					   __kernel_size_t n)
{
	while(n--) {
		sbus_writeb(c, dst);
		dst++;
	}
	return (void *) dst;
}

#define sbus_memset_io(d,c,sz)	_sbus_memset_io(d,c,sz)

static inline void __iomem *
_memset_io(void __iomem *dst, int c, __kernel_size_t n)
{
	void __iomem *d = dst;

	while (n--) {
		writeb(c, d);
		d++;
	}

	return dst;
}

#define memset_io(d,c,sz)	_memset_io(d,c,sz)

static inline void __iomem *
_memcpy_fromio(void *dst, void __iomem *src, __kernel_size_t n)
{
	char *d = dst;

	while (n--) {
		char tmp = readb(src);
		*d++ = tmp;
		src++;
	}

	return dst;
}

#define memcpy_fromio(d,s,sz)	_memcpy_fromio(d,s,sz)

static inline void __iomem *
_memcpy_toio(void __iomem *dst, const void *src, __kernel_size_t n)
{
	const char *s = src;
	void __iomem *d = dst;

	while (n--) {
		char tmp = *s++;
		writeb(tmp, d);
		d++;
	}
	return dst;
}

#define memcpy_toio(d,s,sz)	_memcpy_toio(d,s,sz)

static inline int check_signature(unsigned long io_addr,
				  const unsigned char *signature,
				  int length)
{
	int retval = 0;
	do {
		if (readb((void __iomem *)io_addr) != *signature++)
			goto out;
		io_addr++;
	} while (--length);
	retval = 1;
out:
	return retval;
}

#ifdef __KERNEL__

/* On sparc64 we have the whole physical IO address space accessible
 * using physically addressed loads and stores, so this does nothing.
 */
#define ioremap(__offset, __size)	((void __iomem *)(__offset))
#define ioremap_nocache(X,Y)		ioremap((X),(Y))
#define iounmap(__addr)			do { (void)(__addr); } while(0)

#define ioread8(X)			readb(X)
#define ioread16(X)			readw(X)
#define ioread32(X)			readl(X)
#define iowrite8(val,X)			writeb(val,X)
#define iowrite16(val,X)		writew(val,X)
#define iowrite32(val,X)		writel(val,X)

/* Create a virtual mapping cookie for an IO port range */
extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
extern void ioport_unmap(void __iomem *);

/* 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);
extern void pci_iounmap(struct pci_dev *dev, void __iomem *);

/* Similarly for SBUS. */
#define sbus_ioremap(__res, __offset, __size, __name) \
({	unsigned long __ret; \
	__ret  = (__res)->start + (((__res)->flags & 0x1ffUL) << 32UL); \
	__ret += (unsigned long) (__offset); \
	if (! request_region((__ret), (__size), (__name))) \
		__ret = 0UL; \
	(void __iomem *) __ret; \
})

#define sbus_iounmap(__addr, __size)	\
	release_region((unsigned long)(__addr), (__size))

/* Nothing to do */

#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 /* !(__SPARC64_IO_H) */