io.h
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- /*
- * linux/include/asm-arm/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_ARM_IO_H
- #define __ASM_ARM_IO_H
- #ifdef __KERNEL__
- #include <linux/types.h>
- #include <asm/memory.h>
- #include <asm/arch/hardware.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_getl(a) (*(volatile unsigned int *)(a))
- #define __arch_putb(v,a) (*(volatile unsigned char *)(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
- */
- #include <asm/arch/io.h>
- /*
- * IO definitions. We define {out,in,outs,ins}[bwl] if __io is defined
- * by the machine. Otherwise, these definitions are left for the machine
- * specific header files to pick up.
- *
- * 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.
- */
- #ifdef __io
- #define outb(v,p) __raw_writeb(v,__io(p))
- #define outw(v,p) __raw_writew(v,__io(p))
- #define outl(v,p) __raw_writel(v,__io(p))
- #define inb(p) ({ unsigned int __v = __raw_readb(__io(p)); __v; })
- #define inw(p) ({ unsigned int __v = __raw_readw(__io(p)); __v; })
- #define inl(p) ({ unsigned int __v = __raw_readl(__io(p)); __v; })
- #define outsb(p,d,l) __raw_writesb(__io(p),d,l)
- #define outsw(p,d,l) __raw_writesw(__io(p),d,l)
- #define outsl(p,d,l) __raw_writesl(__io(p),d,l)
- #define insb(p,d,l) __raw_readsb(__io(p),d,l)
- #define insw(p,d,l) __raw_readsw(__io(p),d,l)
- #define insl(p,d,l) __raw_readsl(__io(p),d,l)
- #endif
- #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)
- /*
- * 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);
- extern void __readwrite_bug(const char *fn);
- /*
- * 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(addr) ({ unsigned int __v = __raw_readb(__mem_pci(addr)); __v; })
- #define readw(addr) ({ unsigned int __v = __raw_readw(__mem_pci(addr)); __v; })
- #define readl(addr) ({ unsigned int __v = __raw_readl(__mem_pci(addr)); __v; })
- #define writeb(val,addr) __raw_writeb(val,__mem_pci(addr))
- #define writew(val,addr) __raw_writew(val,__mem_pci(addr))
- #define writel(val,addr) __raw_writel(val,__mem_pci(addr))
- #define memset_io(a,b,c) _memset_io(__mem_pci(a),(b),(c))
- #define memcpy_fromio(a,b,c) _memcpy_fromio((a),__mem_pci(b),(c))
- #define memcpy_toio(a,b,c) _memcpy_toio(__mem_pci(a),(b),(c))
- #define eth_io_copy_and_sum(a,b,c,d)
- eth_copy_and_sum((a),__mem_pci(b),(c),(d))
- 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) (__readwrite_bug("readb"),0)
- #define readw(addr) (__readwrite_bug("readw"),0)
- #define readl(addr) (__readwrite_bug("readl"),0)
- #define writeb(v,addr) __readwrite_bug("writeb")
- #define writew(v,addr) __readwrite_bug("writew")
- #define writel(v,addr) __readwrite_bug("writel")
- #define eth_io_copy_and_sum(a,b,c,d) __readwrite_bug("eth_io_copy_and_sum")
- #define check_signature(io,sig,len) (0)
- #endif /* __mem_pci */
- /*
- * remap a physical address `phys' of size `size' with page protection `prot'
- * into virtual address `from'
- */
- #define io_remap_page_range(from,phys,size,prot)
- remap_page_range(from,phys,size,prot)
- /*
- * If this architecture has ISA IO, then define the isa_read/isa_write
- * macros.
- */
- #ifdef __mem_isa
- #define isa_readb(addr) __raw_readb(__mem_isa(addr))
- #define isa_readw(addr) __raw_readw(__mem_isa(addr))
- #define isa_readl(addr) __raw_readl(__mem_isa(addr))
- #define isa_writeb(val,addr) __raw_writeb(val,__mem_isa(addr))
- #define isa_writew(val,addr) __raw_writew(val,__mem_isa(addr))
- #define isa_writel(val,addr) __raw_writel(val,__mem_isa(addr))
- #define isa_memset_io(a,b,c) _memset_io(__mem_isa(a),(b),(c))
- #define isa_memcpy_fromio(a,b,c) _memcpy_fromio((a),__mem_isa(b),(c))
- #define isa_memcpy_toio(a,b,c) _memcpy_toio(__mem_isa((a)),(b),(c))
- #define isa_eth_io_copy_and_sum(a,b,c,d)
- eth_copy_and_sum((a),__mem_isa(b),(c),(d))
- static inline int
- isa_check_signature(unsigned long io_addr, const unsigned char *signature,
- int length)
- {
- int retval = 0;
- do {
- if (isa_readb(io_addr) != *signature)
- goto out;
- io_addr++;
- signature++;
- length--;
- } while (length);
- retval = 1;
- out:
- return retval;
- }
- #else /* __mem_isa */
- #define isa_readb(addr) (__readwrite_bug("isa_readb"),0)
- #define isa_readw(addr) (__readwrite_bug("isa_readw"),0)
- #define isa_readl(addr) (__readwrite_bug("isa_readl"),0)
- #define isa_writeb(val,addr) __readwrite_bug("isa_writeb")
- #define isa_writew(val,addr) __readwrite_bug("isa_writew")
- #define isa_writel(val,addr) __readwrite_bug("isa_writel")
- #define isa_memset_io(a,b,c) __readwrite_bug("isa_memset_io")
- #define isa_memcpy_fromio(a,b,c) __readwrite_bug("isa_memcpy_fromio")
- #define isa_memcpy_toio(a,b,c) __readwrite_bug("isa_memcpy_toio")
- #define isa_eth_io_copy_and_sum(a,b,c,d)
- __readwrite_bug("isa_eth_io_copy_and_sum")
- #define isa_check_signature(io,sig,len) (0)
- #endif /* __mem_isa */
- #endif /* __KERNEL__ */
- #endif /* __ASM_ARM_IO_H */