arch/sh/include/asm/io.h - u-boot - Git at Google

 /*
  *  linux/include/asm-sh/io.h
  *
  *  Copyright (C) 1996-2000 Russell King
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * Modifications:
  *  16-Sep-1996	RMK	Inlined the inx/outx functions & optimised for both
  *			constant addresses and variable addresses.
  *  04-Dec-1997	RMK	Moved a lot of this stuff to the new architecture
  *			specific IO header files.
  *  27-Mar-1999	PJB	Second parameter of memcpy_toio is const..
  *  04-Apr-1999	PJB	Added check_signature.
  *  12-Dec-1999	RMK	More cleanups
  *  18-Jun-2000 RMK	Removed virt_to_* and friends definitions
  */
 #ifndef __ASM_SH_IO_H
 #define __ASM_SH_IO_H

 #ifdef __KERNEL__

 #include <linux/types.h>
 #include <asm/byteorder.h>

 /*
  * Generic virtual read/write.  Note that we don't support half-word
  * read/writes.  We define __arch_*[bl] here, and leave __arch_*w
  * to the architecture specific code.
  */
 #define __arch_getb(a)			(*(volatile unsigned char *)(a))
 #define __arch_getw(a)			(*(volatile unsigned short *)(a))
 #define __arch_getl(a)			(*(volatile unsigned int *)(a))

 #define __arch_putb(v, a)		(*(volatile unsigned char *)(a) = (v))
 #define __arch_putw(v, a)		(*(volatile unsigned short *)(a) = (v))
 #define __arch_putl(v, a)		(*(volatile unsigned int *)(a) = (v))

 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
 extern void __raw_writesl(unsigned int addr, const void *data, int longlen);

 extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
 extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
 extern void __raw_readsl(unsigned int addr, void *data, int longlen);

 #define __raw_writeb(v, a)		__arch_putb(v, a)
 #define __raw_writew(v, a)		__arch_putw(v, a)
 #define __raw_writel(v, a)		__arch_putl(v, a)

 #define __raw_readb(a)			__arch_getb(a)
 #define __raw_readw(a)			__arch_getw(a)
 #define __raw_readl(a)			__arch_getl(a)

 /*
  * The compiler seems to be incapable of optimising constants
  * properly.  Spell it out to the compiler in some cases.
  * These are only valid for small values of "off" (< 1<<12)
  */
 #define __raw_base_writeb(val, base, off)	__arch_base_putb(val, base, off)
 #define __raw_base_writew(val, base, off)	__arch_base_putw(val, base, off)
 #define __raw_base_writel(val, base, off)	__arch_base_putl(val, base, off)

 #define __raw_base_readb(base, off)	__arch_base_getb(base, off)
 #define __raw_base_readw(base, off)	__arch_base_getw(base, off)
 #define __raw_base_readl(base, off)	__arch_base_getl(base, off)

 /*
  * Now, pick up the machine-defined IO definitions
  */
 #if 0	/* XXX###XXX */
 #include <asm/arch/io.h>
 #endif	/* XXX###XXX */

 /*
  *  IO port access primitives
  *  -------------------------
  *
  * The SH doesn't have special IO access instructions; all IO is memory
  * mapped.  Note that these are defined to perform little endian accesses
  * only.  Their primary purpose is to access PCI and ISA peripherals.
  *
  * The machine specific io.h include defines __io to translate an "IO"
  * address to a memory address.
  *
  * Note that we prevent GCC re-ordering or caching values in expressions
  * by introducing sequence points into the in*() definitions.  Note that
  * __raw_* do not guarantee this behaviour.
  *
  * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
  */
 #define outb(v, p)               __raw_writeb(v, p)
 #define outw(v, p)               __raw_writew(cpu_to_le16(v), p)
 #define outl(v, p)               __raw_writel(cpu_to_le32(v), p)

 #define inb(p)  ({ unsigned int __v = __raw_readb(p); __v; })
 #define inw(p)  ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
 #define inl(p)  ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })

 #define outsb(p, d, l)			__raw_writesb(p, d, l)
 #define outsw(p, d, l)			__raw_writesw(p, d, l)
 #define outsl(p, d, l)			__raw_writesl(p, d, l)

 #define insb(p, d, l)			__raw_readsb(p, d, l)
 #define insw(p, d, l)			__raw_readsw(p, d, l)
 #define insl(p, d, l)			__raw_readsl(p, d, l)

 #define outb_p(val, port)		outb((val), (port))
 #define outw_p(val, port)		outw((val), (port))
 #define outl_p(val, port)		outl((val), (port))
 #define inb_p(port)			inb((port))
 #define inw_p(port)			inw((port))
 #define inl_p(port)			inl((port))

 #define outsb_p(port, from, len)		outsb(port, from, len)
 #define outsw_p(port, from, len)		outsw(port, from, len)
 #define outsl_p(port, from, len)		outsl(port, from, len)
 #define insb_p(port, to, len)		insb(port, to, len)
 #define insw_p(port, to, len)		insw(port, to, len)
 #define insl_p(port, to, len)		insl(port, to, len)

 /* for U-Boot PCI */
 #define out_8(port, val)	outb(val, port)
 #define out_le16(port, val)	outw(val, port)
 #define out_le32(port, val)	outl(val, port)
 #define in_8(port)			inb(port)
 #define in_le16(port)		inw(port)
 #define in_le32(port)		inl(port)
 /*
  * ioremap and friends.
  *
  * ioremap takes a PCI memory address, as specified in
  * linux/Documentation/IO-mapping.txt.  If you want a
  * physical address, use __ioremap instead.
  */
 extern void *__ioremap(unsigned long offset, size_t size, unsigned long flags);
 extern void __iounmap(void *addr);

 /*
  * Generic ioremap support.
  *
  * Define:
  *  iomem_valid_addr(off,size)
  *  iomem_to_phys(off)
  */
 #ifdef iomem_valid_addr
 #define __arch_ioremap(off, sz, nocache)				\
 ({								\
 	unsigned long _off = (off), _size = (sz);		\
 	void *_ret = (void *)0;					\
 	if (iomem_valid_addr(_off, _size))			\
 		_ret = __ioremap(iomem_to_phys(_off), _size, 0);	\
 	_ret;							\
 })

 #define __arch_iounmap __iounmap
 #endif

 #define ioremap(off, sz)			__arch_ioremap((off), (sz), 0)
 #define ioremap_nocache(off, sz)		__arch_ioremap((off), (sz), 1)
 #define iounmap(_addr)			__arch_iounmap(_addr)

 /*
  * DMA-consistent mapping functions.  These allocate/free a region of
  * uncached, unwrite-buffered mapped memory space for use with DMA
  * devices.  This is the "generic" version.  The PCI specific version
  * is in pci.h
  */
 extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
 extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
 extern void consistent_sync(void *vaddr, size_t size, int rw);

 /*
  * String version of IO memory access ops:
  */
 extern void _memcpy_fromio(void *, unsigned long, size_t);
 extern void _memcpy_toio(unsigned long, const void *, size_t);
 extern void _memset_io(unsigned long, int, size_t);

 /*
  * If this architecture has PCI memory IO, then define the read/write
  * macros.  These should only be used with the cookie passed from
  * ioremap.
  */
 #ifdef __mem_pci

 #define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })
 #define readw(c)\
 	({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
 #define readl(c)\
 	({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })

 #define writeb(v, c)		__raw_writeb(v, __mem_pci(c))
 #define writew(v, c)		__raw_writew(cpu_to_le16(v), __mem_pci(c))
 #define writel(v, c)		__raw_writel(cpu_to_le32(v), __mem_pci(c))

 #define memset_io(c, v, l)		_memset_io(__mem_pci(c), (v), (l))
 #define memcpy_fromio(a, c, l)	_memcpy_fromio((a), __mem_pci(c), (l))
 #define memcpy_toio(c, a, l)	_memcpy_toio(__mem_pci(c), (a), (l))

 #define eth_io_copy_and_sum(s, c, l, b) \
 				eth_copy_and_sum((s), __mem_pci(c), (l), (b))

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

 #elif !defined(readb)

 #define readb(addr)	__raw_readb(addr)
 #define readw(addr)	__raw_readw(addr)
 #define readl(addr)	__raw_readl(addr)
 #define writeb(v, addr)	__raw_writeb(v, addr)
 #define writew(v, addr)	__raw_writew(v, addr)
 #define writel(v, addr)	__raw_writel(v, addr)

 #define check_signature(io, sig, len)	(0)

 #endif	/* __mem_pci */

 static inline void sync(void)
 {
 }

 /*
  * Clear and set bits in one shot. These macros can be used to clear and
  * set multiple bits in a register using a single call. These macros can
  * also be used to set a multiple-bit bit pattern using a mask, by
  * specifying the mask in the 'clear' parameter and the new bit pattern
  * in the 'set' parameter.
  */

 #define clrbits(type, addr, clear) \
 		out_##type((addr), in_##type(addr) & ~(clear))

 #define setbits(type, addr, set) \
 		out_##type((addr), in_##type(addr) | (set))

 #define clrsetbits(type, addr, clear, set) \
 		out_##type((addr), (in_##type(addr) & ~(clear)) | (set))

 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
 #define setbits_be32(addr, set) setbits(be32, addr, set)
 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)

 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
 #define setbits_le32(addr, set) setbits(le32, addr, set)
 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)

 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
 #define setbits_be16(addr, set) setbits(be16, addr, set)
 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)

 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
 #define setbits_le16(addr, set) setbits(le16, addr, set)
 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)

 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
 #define setbits_8(addr, set) setbits(8, addr, set)
 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)

 /*
  * Given a physical address and a length, return a virtual address
  * that can be used to access the memory range with the caching
  * properties specified by "flags".
  */
 #define MAP_NOCACHE     (0)
 #define MAP_WRCOMBINE   (0)
 #define MAP_WRBACK      (0)
 #define MAP_WRTHROUGH   (0)

 static inline void *
 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
 {
 	return (void *)paddr;
 }

 /*
  * Take down a mapping set up by map_physmem().
  */
 static inline void unmap_physmem(void *vaddr, unsigned long flags)
 {

 }

 static inline phys_addr_t virt_to_phys(void *vaddr)
 {
 	return (phys_addr_t)(vaddr);
 }

 #endif	/* __KERNEL__ */
 #endif	/* __ASM_SH_IO_H */
	/*
	* linux/include/asm-sh/io.h
	*
	* Copyright (C) 1996-2000 Russell King
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* Modifications:
	* 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
	* constant addresses and variable addresses.
	* 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
	* specific IO header files.
	* 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
	* 04-Apr-1999 PJB Added check_signature.
	* 12-Dec-1999 RMK More cleanups
	* 18-Jun-2000 RMK Removed virt_to_* and friends definitions
	*/
	#ifndef __ASM_SH_IO_H
	#define __ASM_SH_IO_H

	#ifdef __KERNEL__

	#include <linux/types.h>
	#include <asm/byteorder.h>

	/*
	* Generic virtual read/write. Note that we don't support half-word
	* read/writes. We define __arch_[bl] here, and leave __arch_w
	* to the architecture specific code.
	*/
	#define __arch_getb(a) ((volatile unsigned char )(a))
	#define __arch_getw(a) ((volatile unsigned short )(a))
	#define __arch_getl(a) ((volatile unsigned int )(a))

	#define __arch_putb(v, a) ((volatile unsigned char )(a) = (v))
	#define __arch_putw(v, a) ((volatile unsigned short )(a) = (v))
	#define __arch_putl(v, a) ((volatile unsigned int )(a) = (v))

	extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
	extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
	extern void __raw_writesl(unsigned int addr, const void *data, int longlen);

	extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
	extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
	extern void __raw_readsl(unsigned int addr, void *data, int longlen);

	#define __raw_writeb(v, a) __arch_putb(v, a)
	#define __raw_writew(v, a) __arch_putw(v, a)
	#define __raw_writel(v, a) __arch_putl(v, a)

	#define __raw_readb(a) __arch_getb(a)
	#define __raw_readw(a) __arch_getw(a)
	#define __raw_readl(a) __arch_getl(a)

	/*
	* The compiler seems to be incapable of optimising constants
	* properly. Spell it out to the compiler in some cases.
	* These are only valid for small values of "off" (< 1<<12)
	*/
	#define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off)
	#define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off)
	#define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off)

	#define __raw_base_readb(base, off) __arch_base_getb(base, off)
	#define __raw_base_readw(base, off) __arch_base_getw(base, off)
	#define __raw_base_readl(base, off) __arch_base_getl(base, off)

	/*
	* Now, pick up the machine-defined IO definitions
	*/
	#if 0 /* XXX###XXX */
	#include <asm/arch/io.h>
	#endif /* XXX###XXX */

	/*
	* IO port access primitives
	* -------------------------
	*
	* The SH doesn't have special IO access instructions; all IO is memory
	* mapped. Note that these are defined to perform little endian accesses
	* only. Their primary purpose is to access PCI and ISA peripherals.
	*
	* The machine specific io.h include defines __io to translate an "IO"
	* address to a memory address.
	*
	* Note that we prevent GCC re-ordering or caching values in expressions
	* by introducing sequence points into the in*() definitions. Note that
	* __raw_* do not guarantee this behaviour.
	*
	* The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
	*/
	#define outb(v, p) __raw_writeb(v, p)
	#define outw(v, p) __raw_writew(cpu_to_le16(v), p)
	#define outl(v, p) __raw_writel(cpu_to_le32(v), p)

	#define inb(p) ({ unsigned int __v = __raw_readb(p); __v; })
	#define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
	#define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })

	#define outsb(p, d, l) __raw_writesb(p, d, l)
	#define outsw(p, d, l) __raw_writesw(p, d, l)
	#define outsl(p, d, l) __raw_writesl(p, d, l)

	#define insb(p, d, l) __raw_readsb(p, d, l)
	#define insw(p, d, l) __raw_readsw(p, d, l)
	#define insl(p, d, l) __raw_readsl(p, d, l)

	#define outb_p(val, port) outb((val), (port))
	#define outw_p(val, port) outw((val), (port))
	#define outl_p(val, port) outl((val), (port))
	#define inb_p(port) inb((port))
	#define inw_p(port) inw((port))
	#define inl_p(port) inl((port))

	#define outsb_p(port, from, len) outsb(port, from, len)
	#define outsw_p(port, from, len) outsw(port, from, len)
	#define outsl_p(port, from, len) outsl(port, from, len)
	#define insb_p(port, to, len) insb(port, to, len)
	#define insw_p(port, to, len) insw(port, to, len)
	#define insl_p(port, to, len) insl(port, to, len)

	/* for U-Boot PCI */
	#define out_8(port, val) outb(val, port)
	#define out_le16(port, val) outw(val, port)
	#define out_le32(port, val) outl(val, port)
	#define in_8(port) inb(port)
	#define in_le16(port) inw(port)
	#define in_le32(port) inl(port)
	/*
	* ioremap and friends.
	*
	* ioremap takes a PCI memory address, as specified in
	* linux/Documentation/IO-mapping.txt. If you want a
	* physical address, use __ioremap instead.
	*/
	extern void *__ioremap(unsigned long offset, size_t size, unsigned long flags);
	extern void __iounmap(void *addr);

	/*
	* Generic ioremap support.
	*
	* Define:
	* iomem_valid_addr(off,size)
	* iomem_to_phys(off)
	*/
	#ifdef iomem_valid_addr
	#define __arch_ioremap(off, sz, nocache) \
	({ \
	unsigned long _off = (off), _size = (sz); \
	void _ret = (void )0; \
	if (iomem_valid_addr(_off, _size)) \
	_ret = __ioremap(iomem_to_phys(_off), _size, 0); \
	_ret; \
	})

	#define __arch_iounmap __iounmap
	#endif

	#define ioremap(off, sz) __arch_ioremap((off), (sz), 0)
	#define ioremap_nocache(off, sz) __arch_ioremap((off), (sz), 1)
	#define iounmap(_addr) __arch_iounmap(_addr)

	/*
	* DMA-consistent mapping functions. These allocate/free a region of
	* uncached, unwrite-buffered mapped memory space for use with DMA
	* devices. This is the "generic" version. The PCI specific version
	* is in pci.h
	*/
	extern void consistent_alloc(int gfp, size_t size, dma_addr_t handle);
	extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
	extern void consistent_sync(void *vaddr, size_t size, int rw);

	/*
	* String version of IO memory access ops:
	*/
	extern void _memcpy_fromio(void *, unsigned long, size_t);
	extern void _memcpy_toio(unsigned long, const void *, size_t);
	extern void _memset_io(unsigned long, int, size_t);

	/*
	* If this architecture has PCI memory IO, then define the read/write
	* macros. These should only be used with the cookie passed from
	* ioremap.
	*/
	#ifdef __mem_pci

	#define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })
	#define readw(c)\
	({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
	#define readl(c)\
	({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })

	#define writeb(v, c) __raw_writeb(v, __mem_pci(c))
	#define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c))
	#define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c))

	#define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l))
	#define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l))
	#define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l))

	#define eth_io_copy_and_sum(s, c, l, b) \
	eth_copy_and_sum((s), __mem_pci(c), (l), (b))

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

	#elif !defined(readb)

	#define readb(addr) __raw_readb(addr)
	#define readw(addr) __raw_readw(addr)
	#define readl(addr) __raw_readl(addr)
	#define writeb(v, addr) __raw_writeb(v, addr)
	#define writew(v, addr) __raw_writew(v, addr)
	#define writel(v, addr) __raw_writel(v, addr)

	#define check_signature(io, sig, len) (0)

	#endif /* __mem_pci */

	static inline void sync(void)
	{
	}

	/*
	* Clear and set bits in one shot. These macros can be used to clear and
	* set multiple bits in a register using a single call. These macros can
	* also be used to set a multiple-bit bit pattern using a mask, by
	* specifying the mask in the 'clear' parameter and the new bit pattern
	* in the 'set' parameter.
	*/

	#define clrbits(type, addr, clear) \
	out_##type((addr), in_##type(addr) & ~(clear))

	#define setbits(type, addr, set) \
	out_##type((addr), in_##type(addr) \| (set))

	#define clrsetbits(type, addr, clear, set) \
	out_##type((addr), (in_##type(addr) & ~(clear)) \| (set))

	#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
	#define setbits_be32(addr, set) setbits(be32, addr, set)
	#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)

	#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
	#define setbits_le32(addr, set) setbits(le32, addr, set)
	#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)

	#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
	#define setbits_be16(addr, set) setbits(be16, addr, set)
	#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)

	#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
	#define setbits_le16(addr, set) setbits(le16, addr, set)
	#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)

	#define clrbits_8(addr, clear) clrbits(8, addr, clear)
	#define setbits_8(addr, set) setbits(8, addr, set)
	#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)

	/*
	* Given a physical address and a length, return a virtual address
	* that can be used to access the memory range with the caching
	* properties specified by "flags".
	*/
	#define MAP_NOCACHE (0)
	#define MAP_WRCOMBINE (0)
	#define MAP_WRBACK (0)
	#define MAP_WRTHROUGH (0)

	static inline void *
	map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
	{
	return (void *)paddr;
	}

	/*
	* Take down a mapping set up by map_physmem().
	*/
	static inline void unmap_physmem(void *vaddr, unsigned long flags)
	{

	}

	static inline phys_addr_t virt_to_phys(void *vaddr)
	{
	return (phys_addr_t)(vaddr);
	}

	#endif /* __KERNEL__ */
	#endif /* __ASM_SH_IO_H */