blob: 0a00db361798d17dfdf666b73b9834a1afbeda60 [file] [log] [blame]
* 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
#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;
} while (length);
retval = 1;
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 */