io.h
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上传日期:2013-04-10
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- /* $Id: io.h,v 1.41.2.1 2001/12/11 22:50:52 davem Exp $ */
- #ifndef __SPARC64_IO_H
- #define __SPARC64_IO_H
- #include <linux/kernel.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
- extern unsigned long phys_base;
- #define page_to_phys(page) ((((page) - mem_map) << PAGE_SHIFT)+phys_base)
- /* 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__("ldubat[%1] %2, %0t/* 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__("lduhat[%1] %2, %0t/* 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__("lduwat[%1] %2, %0t/* 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__("stbat%r0, [%1] %2t/* 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__("sthat%r0, [%1] %2t/* 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__("stwat%r0, [%1] %2t/* pci_outl */"
- : /* no outputs */
- : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- }
- #define inb_p inb
- #define outb_p outb
- #define inw_p inw
- #define outw_p outw
- #define inl_p inl
- #define outl_p outl
- extern void outsb(unsigned long addr, const void *src, unsigned long count);
- extern void outsw(unsigned long addr, const void *src, unsigned long count);
- extern void outsl(unsigned long addr, const void *src, unsigned long count);
- extern void insb(unsigned long addr, void *dst, unsigned long count);
- extern void insw(unsigned long addr, void *dst, unsigned long count);
- extern void insl(unsigned long addr, void *dst, unsigned long count);
- /* Memory functions, same as I/O accesses on Ultra. */
- static __inline__ u8 _readb(unsigned long addr)
- {
- u8 ret;
- __asm__ __volatile__("ldubat[%1] %2, %0t/* pci_readb */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- return ret;
- }
- static __inline__ u16 _readw(unsigned long addr)
- {
- u16 ret;
- __asm__ __volatile__("lduhat[%1] %2, %0t/* pci_readw */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- return ret;
- }
- static __inline__ u32 _readl(unsigned long addr)
- {
- u32 ret;
- __asm__ __volatile__("lduwat[%1] %2, %0t/* pci_readl */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- return ret;
- }
- static __inline__ u64 _readq(unsigned long addr)
- {
- u64 ret;
- __asm__ __volatile__("ldxat[%1] %2, %0t/* pci_readq */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- return ret;
- }
- static __inline__ void _writeb(u8 b, unsigned long addr)
- {
- __asm__ __volatile__("stbat%r0, [%1] %2t/* pci_writeb */"
- : /* no outputs */
- : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- }
- static __inline__ void _writew(u16 w, unsigned long addr)
- {
- __asm__ __volatile__("sthat%r0, [%1] %2t/* pci_writew */"
- : /* no outputs */
- : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- }
- static __inline__ void _writel(u32 l, unsigned long addr)
- {
- __asm__ __volatile__("stwat%r0, [%1] %2t/* pci_writel */"
- : /* no outputs */
- : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- }
- static __inline__ void _writeq(u64 q, unsigned long addr)
- {
- __asm__ __volatile__("stxat%r0, [%1] %2t/* pci_writeq */"
- : /* no outputs */
- : "Jr" (q), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L));
- }
- #define readb(__addr) (_readb((unsigned long)(__addr)))
- #define readw(__addr) (_readw((unsigned long)(__addr)))
- #define readl(__addr) (_readl((unsigned long)(__addr)))
- #define readq(__addr) (_readq((unsigned long)(__addr)))
- #define writeb(__b, __addr) (_writeb((u8)(__b), (unsigned long)(__addr)))
- #define writew(__w, __addr) (_writew((u16)(__w), (unsigned long)(__addr)))
- #define writel(__l, __addr) (_writel((u32)(__l), (unsigned long)(__addr)))
- #define writeq(__q, __addr) (_writeq((u64)(__q), (unsigned long)(__addr)))
- /* Now versions without byte-swapping. */
- static __inline__ u8 _raw_readb(unsigned long addr)
- {
- u8 ret;
- __asm__ __volatile__("ldubat[%1] %2, %0t/* 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__("lduhat[%1] %2, %0t/* 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__("lduwat[%1] %2, %0t/* 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__("ldxat[%1] %2, %0t/* 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__("stbat%r0, [%1] %2t/* 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__("sthat%r0, [%1] %2t/* 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__("stwat%r0, [%1] %2t/* 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__("stxat%r0, [%1] %2t/* 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(unsigned long addr)
- {
- u8 ret;
- __asm__ __volatile__("ldubat[%1] %2, %0t/* sbus_readb */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- return ret;
- }
- static __inline__ u16 _sbus_readw(unsigned long addr)
- {
- u16 ret;
- __asm__ __volatile__("lduhat[%1] %2, %0t/* sbus_readw */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- return ret;
- }
- static __inline__ u32 _sbus_readl(unsigned long addr)
- {
- u32 ret;
- __asm__ __volatile__("lduwat[%1] %2, %0t/* sbus_readl */"
- : "=r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- return ret;
- }
- static __inline__ void _sbus_writeb(u8 b, unsigned long addr)
- {
- __asm__ __volatile__("stbat%r0, [%1] %2t/* sbus_writeb */"
- : /* no outputs */
- : "Jr" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- }
- static __inline__ void _sbus_writew(u16 w, unsigned long addr)
- {
- __asm__ __volatile__("sthat%r0, [%1] %2t/* sbus_writew */"
- : /* no outputs */
- : "Jr" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- }
- static __inline__ void _sbus_writel(u32 l, unsigned long addr)
- {
- __asm__ __volatile__("stwat%r0, [%1] %2t/* sbus_writel */"
- : /* no outputs */
- : "Jr" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- }
- #define sbus_readb(__addr) (_sbus_readb((unsigned long)(__addr)))
- #define sbus_readw(__addr) (_sbus_readw((unsigned long)(__addr)))
- #define sbus_readl(__addr) (_sbus_readl((unsigned long)(__addr)))
- #define sbus_writeb(__b, __addr) (_sbus_writeb((__b), (unsigned long)(__addr)))
- #define sbus_writew(__w, __addr) (_sbus_writew((__w), (unsigned long)(__addr)))
- #define sbus_writel(__l, __addr) (_sbus_writel((__l), (unsigned long)(__addr)))
- static inline void *_sbus_memset_io(unsigned long 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((unsigned long)d,(int)c,(__kernel_size_t)sz)
- static inline void *
- _memset_io(void *dst, int c, __kernel_size_t n)
- {
- char *d = dst;
- while (n--) {
- writeb(c, d);
- d++;
- }
- return dst;
- }
- #define memset_io(d,c,sz)
- _memset_io((void *)d,(int)c,(__kernel_size_t)sz)
- static inline void *
- _memcpy_fromio(void *dst, unsigned long 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((void *)d,(unsigned long)s,(__kernel_size_t)sz)
- static inline void *
- _memcpy_toio(unsigned long dst, const void *src, __kernel_size_t n)
- {
- const char *s = src;
- unsigned long d = dst;
- while (n--) {
- char tmp = *s++;
- writeb(tmp, d);
- d++;
- }
- return (void *)dst;
- }
- #define memcpy_toio(d,s,sz)
- _memcpy_toio((unsigned long)d,(const void *)s,(__kernel_size_t)sz)
- 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;
- 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 *)(__offset))
- #define ioremap_nocache(X,Y) ioremap((X),(Y))
- #define iounmap(__addr) do { } while(0)
- /* 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;
- __ret;
- })
- #define sbus_iounmap(__addr, __size)
- release_region((__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) */