io.h
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上传日期:2013-04-10
资源大小:33168k
文件大小:14k
- #ifndef __ASM_SH_IO_H
- #define __ASM_SH_IO_H
- /*
- * Convention:
- * read{b,w,l}/write{b,w,l} are for PCI,
- * while in{b,w,l}/out{b,w,l} are for ISA
- * These may (will) be platform specific function.
- * In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p
- * and 'string' versions: ins{b,w,l}/outs{b,w,l}
- * For read{b,w,l} and write{b,w,l} there are also __raw versions, which
- * do not have a memory barrier after them.
- *
- * In addition, we have
- * ctrl_in{b,w,l}/ctrl_out{b,w,l} for SuperH specific I/O.
- * which are processor specific.
- */
- /*
- * We follow the Alpha convention here:
- * __inb expands to an inline function call (which either calls via the
- * mach_vec if generic, or a machine specific implementation)
- * _inb is a real function call (note ___raw fns are _ version of __raw)
- * inb by default expands to _inb, but the machine specific code may
- * define it to __inb if it chooses.
- */
- #include <asm/cache.h>
- #include <asm/system.h>
- #include <linux/config.h>
- /*
- * Depending on which platform we are running on, we need different
- * I/O functions.
- */
- #ifdef __KERNEL__
- #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_CQREEK) || defined(CONFIG_SH_UNKNOWN)
- /* In a generic kernel, we always go through the machine vector. */
- #include <asm/machvec.h>
- # define __inb(p) sh_mv.mv_inb((p))
- # define __inw(p) sh_mv.mv_inw((p))
- # define __inl(p) sh_mv.mv_inl((p))
- # define __outb(x,p) sh_mv.mv_outb((x),(p))
- # define __outw(x,p) sh_mv.mv_outw((x),(p))
- # define __outl(x,p) sh_mv.mv_outl((x),(p))
- # define __inb_p(p) sh_mv.mv_inb_p((p))
- # define __inw_p(p) sh_mv.mv_inw_p((p))
- # define __inl_p(p) sh_mv.mv_inl_p((p))
- # define __outb_p(x,p) sh_mv.mv_outb_p((x),(p))
- # define __outw_p(x,p) sh_mv.mv_outw_p((x),(p))
- # define __outl_p(x,p) sh_mv.mv_outl_p((x),(p))
- #define __insb(p,b,c) sh_mv.mv_insb((p), (b), (c))
- #define __insw(p,b,c) sh_mv.mv_insw((p), (b), (c))
- #define __insl(p,b,c) sh_mv.mv_insl((p), (b), (c))
- #define __outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c))
- #define __outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c))
- #define __outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c))
- # define __readb(a) sh_mv.mv_readb((a))
- # define __readw(a) sh_mv.mv_readw((a))
- # define __readl(a) sh_mv.mv_readl((a))
- # define __writeb(v,a) sh_mv.mv_writeb((v),(a))
- # define __writew(v,a) sh_mv.mv_writew((v),(a))
- # define __writel(v,a) sh_mv.mv_writel((v),(a))
- # define __ioremap(a,s) sh_mv.mv_ioremap((a), (s))
- # define __iounmap(a) sh_mv.mv_iounmap((a))
- # define __isa_port2addr(a) sh_mv.mv_isa_port2addr(a)
- # define inb __inb
- # define inw __inw
- # define inl __inl
- # define outb __outb
- # define outw __outw
- # define outl __outl
- # define inb_p __inb_p
- # define inw_p __inw_p
- # define inl_p __inl_p
- # define outb_p __outb_p
- # define outw_p __outw_p
- # define outl_p __outl_p
- # define insb __insb
- # define insw __insw
- # define insl __insl
- # define outsb __outsb
- # define outsw __outsw
- # define outsl __outsl
- # define __raw_readb __readb
- # define __raw_readw __readw
- # define __raw_readl __readl
- # define __raw_writeb __writeb
- # define __raw_writew __writew
- # define __raw_writel __writel
- #else
- /* Control operations through platform specific headers */
- # define __WANT_IO_DEF
- # if defined(CONFIG_SH_HP600)
- # include <asm/io_hd64461.h>
- # elif defined(CONFIG_SH_SOLUTION_ENGINE)
- # include <asm/io_se.h>
- # elif defined(CONFIG_SH_SH2000)
- # include <asm/io_sh2000.h>
- # elif defined(CONFIG_SH_DMIDA) ||
- defined(CONFIG_SH_STB1_HARP) ||
- defined(CONFIG_SH_STB1_OVERDRIVE)
- # include <asm/io_hd64465.h>
- # elif defined(CONFIG_SH_EC3104)
- # include <asm/io_ec3104.h>
- # elif defined(CONFIG_SH_DREAMCAST)
- # include <asm/io_dc.h>
- # elif defined(CONFIG_SH_CAT68701)
- # include <asm/io_cat68701.h>
- # elif defined(CONFIG_SH_BIGSUR)
- # include <asm/io_bigsur.h>
- # elif defined(CONFIG_SH_7751_SOLUTION_ENGINE)
- # include <asm/io_7751se.h>
- # elif defined(CONFIG_SH_ADX)
- # include <asm/io_adx.h>
- # elif defined(CONFIG_SH_UNKNOWN)
- # include <asm/io_unknown.h>
- # else
- # error "What system is this?"
- #endif
- #undef __WANT_IO_DEF
- #endif /* GENERIC */
- #endif /* __KERNEL__ */
- /* These are always function calls, in both kernel and user space */
- extern unsigned char _inb (unsigned long port);
- extern unsigned short _inw (unsigned long port);
- extern unsigned int _inl (unsigned long port);
- extern void _outb (unsigned char b, unsigned long port);
- extern void _outw (unsigned short w, unsigned long port);
- extern void _outl (unsigned int l, unsigned long port);
- extern unsigned char _inb_p (unsigned long port);
- extern unsigned short _inw_p (unsigned long port);
- extern unsigned int _inl_p (unsigned long port);
- extern void _outb_p (unsigned char b, unsigned long port);
- extern void _outw_p (unsigned short w, unsigned long port);
- extern void _outl_p (unsigned int l, unsigned long port);
- extern void _insb (unsigned long port, void *dst, unsigned long count);
- extern void _insw (unsigned long port, void *dst, unsigned long count);
- extern void _insl (unsigned long port, void *dst, unsigned long count);
- extern void _outsb (unsigned long port, const void *src, unsigned long count);
- extern void _outsw (unsigned long port, const void *src, unsigned long count);
- extern void _outsl (unsigned long port, const void *src, unsigned long count);
- extern unsigned char _readb(unsigned long addr);
- extern unsigned short _readw(unsigned long addr);
- extern unsigned int _readl(unsigned long addr);
- extern void _writeb(unsigned char b, unsigned long addr);
- extern void _writew(unsigned short b, unsigned long addr);
- extern void _writel(unsigned int b, unsigned long addr);
- #ifdef __KERNEL__
- extern unsigned char ___raw_readb(unsigned long addr);
- extern unsigned short ___raw_readw(unsigned long addr);
- extern unsigned int ___raw_readl(unsigned long addr);
- extern void ___raw_writeb(unsigned char b, unsigned long addr);
- extern void ___raw_writew(unsigned short b, unsigned long addr);
- extern void ___raw_writel(unsigned int b, unsigned long addr);
- #endif
- #ifdef __KERNEL__
- /*
- * The platform header files may define some of these macros to use
- * the inlined versions where appropriate. These macros may also be
- * redefined by userlevel programs.
- */
- #ifndef inb
- # define inb(p) _inb(p)
- #endif
- #ifndef inw
- # define inw(p) _inw(p)
- #endif
- #ifndef inl
- # define inl(p) _inl(p)
- #endif
- #ifndef outb
- # define outb(b,p) _outb((b),(p))
- #endif
- #ifndef outw
- # define outw(w,p) _outw((w),(p))
- #endif
- #ifndef outl
- # define outl(l,p) _outl((l),(p))
- #endif
- #ifndef inb_p
- # define inb_p _inb_p
- #endif
- #ifndef inw_p
- # define inw_p _inw_p
- #endif
- #ifndef inl_p
- # define inl_p _inl_p
- #endif
- #ifndef outb_p
- # define outb_p _outb_p
- #endif
- #ifndef outw_p
- # define outw_p _outw_p
- #endif
- #ifndef outl_p
- # define outl_p _outl_p
- #endif
- #ifndef insb
- # define insb(p,d,c) _insb((p),(d),(c))
- #endif
- #ifndef insw
- # define insw(p,d,c) _insw((p),(d),(c))
- #endif
- #ifndef insl
- # define insl(p,d,c) _insl((p),(d),(c))
- #endif
- #ifndef outsb
- # define outsb(p,s,c) _outsb((p),(s),(c))
- #endif
- #ifndef outsw
- # define outsw(p,s,c) _outsw((p),(s),(c))
- #endif
- #ifndef outsl
- # define outsl(p,s,c) _outsl((p),(s),(c))
- #endif
- #ifdef __raw_readb
- # define readb(a) ({ unsigned long r_ = __raw_readb(a); mb(); r_; })
- #endif
- #ifdef __raw_readw
- # define readw(a) ({ unsigned long r_ = __raw_readw(a); mb(); r_; })
- #endif
- #ifdef __raw_readl
- # define readl(a) ({ unsigned long r_ = __raw_readl(a); mb(); r_; })
- #endif
- #ifdef __raw_writeb
- # define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); })
- #endif
- #ifdef __raw_writew
- # define writew(v,a) ({ __raw_writew((v),(a)); mb(); })
- #endif
- #ifdef __raw_writel
- # define writel(v,a) ({ __raw_writel((v),(a)); mb(); })
- #endif
- #ifndef __raw_readb
- # define __raw_readb(a) ___raw_readb((unsigned long)(a))
- #endif
- #ifndef __raw_readw
- # define __raw_readw(a) ___raw_readw((unsigned long)(a))
- #endif
- #ifndef __raw_readl
- # define __raw_readl(a) ___raw_readl((unsigned long)(a))
- #endif
- #ifndef __raw_writeb
- # define __raw_writeb(v,a) ___raw_writeb((v),(unsigned long)(a))
- #endif
- #ifndef __raw_writew
- # define __raw_writew(v,a) ___raw_writew((v),(unsigned long)(a))
- #endif
- #ifndef __raw_writel
- # define __raw_writel(v,a) ___raw_writel((v),(unsigned long)(a))
- #endif
- #ifndef readb
- # define readb(a) _readb((unsigned long)(a))
- #endif
- #ifndef readw
- # define readw(a) _readw((unsigned long)(a))
- #endif
- #ifndef readl
- # define readl(a) _readl((unsigned long)(a))
- #endif
- #ifndef writeb
- # define writeb(v,a) _writeb((v),(unsigned long)(a))
- #endif
- #ifndef writew
- # define writew(v,a) _writew((v),(unsigned long)(a))
- #endif
- #ifndef writel
- # define writel(v,a) _writel((v),(unsigned long)(a))
- #endif
- #else
- /* Userspace declarations. */
- extern unsigned char inb(unsigned long port);
- extern unsigned short inw(unsigned long port);
- extern unsigned int inl(unsigned long port);
- extern void outb(unsigned char b, unsigned long port);
- extern void outw(unsigned short w, unsigned long port);
- extern void outl(unsigned int l, unsigned long port);
- extern void insb(unsigned long port, void *dst, unsigned long count);
- extern void insw(unsigned long port, void *dst, unsigned long count);
- extern void insl(unsigned long port, void *dst, unsigned long count);
- extern void outsb(unsigned long port, const void *src, unsigned long count);
- extern void outsw(unsigned long port, const void *src, unsigned long count);
- extern void outsl(unsigned long port, const void *src, unsigned long count);
- extern unsigned char readb(unsigned long addr);
- extern unsigned short readw(unsigned long addr);
- extern unsigned long readl(unsigned long addr);
- extern void writeb(unsigned char b, unsigned long addr);
- extern void writew(unsigned short b, unsigned long addr);
- extern void writel(unsigned int b, unsigned long addr);
- #endif /* __KERNEL__ */
- #ifdef __KERNEL__
- /*
- * If the platform has PC-like I/O, this function converts the offset into
- * an address.
- */
- static __inline__ unsigned long isa_port2addr(unsigned long offset)
- {
- return __isa_port2addr(offset);
- }
- #define isa_readb(a) readb(isa_port2addr(a))
- #define isa_readw(a) readw(isa_port2addr(a))
- #define isa_readl(a) readl(isa_port2addr(a))
- #define isa_writeb(b,a) writeb(b,isa_port2addr(a))
- #define isa_writew(w,a) writew(w,isa_port2addr(a))
- #define isa_writel(l,a) writel(l,isa_port2addr(a))
- #define isa_memset_io(a,b,c)
- memset((void *)(isa_port2addr((unsigned long)a)),(b),(c))
- #define isa_memcpy_fromio(a,b,c)
- memcpy((a),(void *)(isa_port2addr((unsigned long)(b))),(c))
- #define isa_memcpy_toio(a,b,c)
- memcpy((void *)(isa_port2addr((unsigned long)(a))),(b),(c))
- /* We really want to try and get these to memcpy etc */
- extern void memcpy_fromio(void *, unsigned long, unsigned long);
- extern void memcpy_toio(unsigned long, const void *, unsigned long);
- extern void memset_io(unsigned long, int, unsigned long);
- /* SuperH on-chip I/O functions */
- static __inline__ unsigned char ctrl_inb(unsigned long addr)
- {
- return *(volatile unsigned char*)addr;
- }
- static __inline__ unsigned short ctrl_inw(unsigned long addr)
- {
- return *(volatile unsigned short*)addr;
- }
- static __inline__ unsigned int ctrl_inl(unsigned long addr)
- {
- return *(volatile unsigned long*)addr;
- }
- static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned char*)addr = b;
- }
- static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned short*)addr = b;
- }
- static __inline__ void ctrl_outl(unsigned int b, unsigned long addr)
- {
- *(volatile unsigned long*)addr = b;
- }
- #define IO_SPACE_LIMIT 0xffffffff
- #include <asm/addrspace.h>
- /*
- * Change virtual addresses to physical addresses and vv.
- * These are trivial on the 1:1 Linux/SuperH mapping
- */
- static __inline__ unsigned long virt_to_phys(volatile void * address)
- {
- return PHYSADDR(address);
- }
- static __inline__ void * phys_to_virt(unsigned long address)
- {
- return (void *)P1SEGADDR(address);
- }
- #define virt_to_bus virt_to_phys
- #define bus_to_virt phys_to_virt
- #define page_to_bus page_to_phys
- /*
- * readX/writeX() are used to access memory mapped devices. On some
- * architectures the memory mapped IO stuff needs to be accessed
- * differently. On the x86 architecture, we just read/write the
- * memory location directly.
- *
- * On SH, we have the whole physical address space mapped at all times
- * (as MIPS does), so "ioremap()" and "iounmap()" do not need to do
- * anything. (This isn't true for all machines but we still handle
- * these cases with wired TLB entries anyway ...)
- *
- * We cheat a bit and always return uncachable areas until we've fixed
- * the drivers to handle caching properly.
- */
- static __inline__ void * ioremap(unsigned long offset, unsigned long size)
- {
- return __ioremap(offset, size);
- }
- static __inline__ void iounmap(void *addr)
- {
- return __iounmap(addr);
- }
- #define ioremap_nocache(off,size) ioremap(off,size)
- 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;
- }
- /*
- * The caches on some architectures aren't dma-coherent and have need to
- * handle this in software. There are three types of operations that
- * can be applied to dma buffers.
- *
- * - dma_cache_wback_inv(start, size) makes caches and RAM coherent by
- * writing the content of the caches back to memory, if necessary.
- * The function also invalidates the affected part of the caches as
- * necessary before DMA transfers from outside to memory.
- * - dma_cache_inv(start, size) invalidates the affected parts of the
- * caches. Dirty lines of the caches may be written back or simply
- * be discarded. This operation is necessary before dma operations
- * to the memory.
- * - dma_cache_wback(start, size) writes back any dirty lines but does
- * not invalidate the cache. This can be used before DMA reads from
- * memory,
- */
- #define dma_cache_wback_inv(_start,_size)
- __flush_purge_region(_start,_size)
- #define dma_cache_inv(_start,_size)
- __flush_invalidate_region(_start,_size)
- #define dma_cache_wback(_start,_size)
- __flush_wback_region(_start,_size)
- #endif /* __KERNEL__ */
- #endif /* __ASM_SH_IO_H */