X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=kitten%2Finclude%2Farch-x86_64%2Fio.h;fp=kitten%2Finclude%2Farch-x86_64%2Fio.h;h=ebf42d8d2d91416e5bd109296b6d1a315b6b30f1;hb=66a1a4c7a9edcd7d8bc207aca093d694a6e6b5b2;hp=0000000000000000000000000000000000000000;hpb=f7cf9c19ecb0a589dd45ae0d2c91814bd3c2acc2;p=palacios.releases.git diff --git a/kitten/include/arch-x86_64/io.h b/kitten/include/arch-x86_64/io.h new file mode 100644 index 0000000..ebf42d8 --- /dev/null +++ b/kitten/include/arch-x86_64/io.h @@ -0,0 +1,308 @@ +#ifndef _ARCH_IO_H +#define _ARCH_IO_H + + +/* + * This file contains the definitions for the x86 IO instructions + * inb/inw/inl/outb/outw/outl and the "string versions" of the same + * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing" + * versions of the single-IO instructions (inb_p/inw_p/..). + * + * This file is not meant to be obfuscating: it's just complicated + * to (a) handle it all in a way that makes gcc able to optimize it + * as well as possible and (b) trying to avoid writing the same thing + * over and over again with slight variations and possibly making a + * mistake somewhere. + */ + +/* + * Thanks to James van Artsdalen for a better timing-fix than + * the two short jumps: using outb's to a nonexistent port seems + * to guarantee better timings even on fast machines. + * + * On the other hand, I'd like to be sure of a non-existent port: + * I feel a bit unsafe about using 0x80 (should be safe, though) + * + * Linus + */ + + /* + * Bit simplified and optimized by Jan Hubicka + * Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999. + * + * isa_memset_io, isa_memcpy_fromio, isa_memcpy_toio added, + * isa_read[wl] and isa_write[wl] fixed + * - Arnaldo Carvalho de Melo + */ + +#define __SLOW_DOWN_IO "\noutb %%al,$0x80" + +#ifdef REALLY_SLOW_IO +#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO +#else +#define __FULL_SLOW_DOWN_IO __SLOW_DOWN_IO +#endif + +/* + * Talk about misusing macros.. + */ +#define __OUT1(s,x) \ +static inline void out##s(unsigned x value, unsigned short port) { + +#define __OUT2(s,s1,s2) \ +__asm__ __volatile__ ("out" #s " %" s1 "0,%" s2 "1" + +#define __OUT(s,s1,x) \ +__OUT1(s,x) __OUT2(s,s1,"w") : : "a" (value), "Nd" (port)); } \ +__OUT1(s##_p,x) __OUT2(s,s1,"w") __FULL_SLOW_DOWN_IO : : "a" (value), "Nd" (port));} \ + +#define __IN1(s) \ +static inline RETURN_TYPE in##s(unsigned short port) { RETURN_TYPE _v; + +#define __IN2(s,s1,s2) \ +__asm__ __volatile__ ("in" #s " %" s2 "1,%" s1 "0" + +#define __IN(s,s1,i...) \ +__IN1(s) __IN2(s,s1,"w") : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \ +__IN1(s##_p) __IN2(s,s1,"w") __FULL_SLOW_DOWN_IO : "=a" (_v) : "Nd" (port) ,##i ); return _v; } \ + +#define __INS(s) \ +static inline void ins##s(unsigned short port, void * addr, unsigned long count) \ +{ __asm__ __volatile__ ("rep ; ins" #s \ +: "=D" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); } + +#define __OUTS(s) \ +static inline void outs##s(unsigned short port, const void * addr, unsigned long count) \ +{ __asm__ __volatile__ ("rep ; outs" #s \ +: "=S" (addr), "=c" (count) : "d" (port),"0" (addr),"1" (count)); } + +#define RETURN_TYPE unsigned char +__IN(b,"") +#undef RETURN_TYPE +#define RETURN_TYPE unsigned short +__IN(w,"") +#undef RETURN_TYPE +#define RETURN_TYPE unsigned int +__IN(l,"") +#undef RETURN_TYPE + +__OUT(b,"b",char) +__OUT(w,"w",short) +__OUT(l,,int) + +__INS(b) +__INS(w) +__INS(l) + +__OUTS(b) +__OUTS(w) +__OUTS(l) + +#define IO_SPACE_LIMIT 0xffff + +#if defined(__KERNEL__) && __x86_64__ + +// #include + +#ifndef __i386__ +/* + * Change virtual addresses to physical addresses and vv. + * These are pretty trivial + */ +static inline unsigned long virt_to_phys(volatile void * address) +{ + return __pa(address); +} + +static inline void * phys_to_virt(unsigned long address) +{ + return __va(address); +} +#endif + +/* + * Change "struct page" to physical address. + */ +#define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) + +#include + +extern void __iomem *__ioremap(unsigned long offset, unsigned long size, unsigned long flags); + +static inline void __iomem * ioremap (unsigned long offset, unsigned long size) +{ + return __ioremap(offset, size, 0); +} + +extern void *early_ioremap(unsigned long addr, unsigned long size); +extern void early_iounmap(void *addr, unsigned long size); + +/* + * This one maps high address device memory and turns off caching for that area. + * it's useful if some control registers are in such an area and write combining + * or read caching is not desirable: + */ +extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size); +extern void iounmap(volatile void __iomem *addr); + +/* + * ISA I/O bus memory addresses are 1:1 with the physical address. + */ +#define isa_virt_to_bus virt_to_phys +#define isa_page_to_bus page_to_phys +#define isa_bus_to_virt phys_to_virt + +/* + * However PCI ones are not necessarily 1:1 and therefore these interfaces + * are forbidden in portable PCI drivers. + * + * Allow them on x86 for legacy drivers, though. + */ +#define virt_to_bus virt_to_phys +#define bus_to_virt phys_to_virt + +/* + * 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. + */ + +static inline __u8 __readb(const volatile void __iomem *addr) +{ + return *(__force volatile __u8 *)addr; +} +static inline __u16 __readw(const volatile void __iomem *addr) +{ + return *(__force volatile __u16 *)addr; +} +static __always_inline __u32 __readl(const volatile void __iomem *addr) +{ + return *(__force volatile __u32 *)addr; +} +static inline __u64 __readq(const volatile void __iomem *addr) +{ + return *(__force volatile __u64 *)addr; +} +#define readb(x) __readb(x) +#define readw(x) __readw(x) +#define readl(x) __readl(x) +#define readq(x) __readq(x) +#define readb_relaxed(a) readb(a) +#define readw_relaxed(a) readw(a) +#define readl_relaxed(a) readl(a) +#define readq_relaxed(a) readq(a) +#define __raw_readb readb +#define __raw_readw readw +#define __raw_readl readl +#define __raw_readq readq + +#define mmiowb() + +static inline void __writel(__u32 b, volatile void __iomem *addr) +{ + *(__force volatile __u32 *)addr = b; +} +static inline void __writeq(__u64 b, volatile void __iomem *addr) +{ + *(__force volatile __u64 *)addr = b; +} +static inline void __writeb(__u8 b, volatile void __iomem *addr) +{ + *(__force volatile __u8 *)addr = b; +} +static inline void __writew(__u16 b, volatile void __iomem *addr) +{ + *(__force volatile __u16 *)addr = b; +} +#define writeq(val,addr) __writeq((val),(addr)) +#define writel(val,addr) __writel((val),(addr)) +#define writew(val,addr) __writew((val),(addr)) +#define writeb(val,addr) __writeb((val),(addr)) +#define __raw_writeb writeb +#define __raw_writew writew +#define __raw_writel writel +#define __raw_writeq writeq + +void __memcpy_fromio(void*,unsigned long,unsigned); +void __memcpy_toio(unsigned long,const void*,unsigned); + +static inline void memcpy_fromio(void *to, const volatile void __iomem *from, unsigned len) +{ + __memcpy_fromio(to,(unsigned long)from,len); +} +static inline void memcpy_toio(volatile void __iomem *to, const void *from, unsigned len) +{ + __memcpy_toio((unsigned long)to,from,len); +} + +void memset_io(volatile void __iomem *a, int b, size_t c); + +/* + * ISA space is 'always mapped' on a typical x86 system, no need to + * explicitly ioremap() it. The fact that the ISA IO space is mapped + * to PAGE_OFFSET is pure coincidence - it does not mean ISA values + * are physical addresses. The following constant pointer can be + * used as the IO-area pointer (it can be iounmapped as well, so the + * analogy with PCI is quite large): + */ +#define __ISA_IO_base ((char __iomem *)(PAGE_OFFSET)) + +/* + * Again, x86-64 does not require mem IO specific function. + */ + +#define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void *)(b),(c),(d)) + +/** + * check_signature - find BIOS signatures + * @io_addr: mmio address to check + * @signature: signature block + * @length: length of signature + * + * Perform a signature comparison with the mmio address io_addr. This + * address should have been obtained by ioremap. + * Returns 1 on a match. + */ + +static inline int check_signature(void __iomem *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; +} + +/* 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) + +#define flush_write_buffers() + +extern int iommu_bio_merge; +#define BIO_VMERGE_BOUNDARY iommu_bio_merge + +/* + * Convert a physical pointer to a virtual kernel pointer for /dev/mem + * access + */ +#define xlate_dev_mem_ptr(p) __va(p) + +/* + * Convert a virtual cached pointer to an uncached pointer + */ +#define xlate_dev_kmem_ptr(p) p + +#endif /* __KERNEL__ */ + +#endif