http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/asm-i386/io.h

#ifndef _ASM_IO_H #define _ASM_IO_H #include <linux/config.h> #include <linux/string.h> #include <linux/compiler.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 <acme@conectiva.com.br> */ #define IO_SPACE_LIMIT 0xffff #define XQUAD_PORTIO_BASE 0xfe400000 #define XQUAD_PORTIO_QUAD 0x40000 /* 256k per quad. */ #ifdef __KERNEL__ #include <asm-generic/iomap.h> #include <linux/vmalloc.h> /* * 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 /** * virt_to_phys - map virtual addresses to physical * @address: address to remap * * The returned physical address is the physical (CPU) mapping for * the memory address given. It is only valid to use this function on * addresses directly mapped or allocated via kmalloc. * * This function does not give bus mappings for DMA transfers. In * almost all conceivable cases a device driver should not be using * this function */ static inline unsigned long virt_to_phys(volatile void * address) { return __pa(address); } /** * phys_to_virt - map physical address to virtual * @address: address to remap * * The returned virtual address is a current CPU mapping for * the memory address given. It is only valid to use this function on * addresses that have a kernel mapping * * This function does not handle bus mappings for DMA transfers. In * almost all conceivable cases a device driver should not be using * this function */ static inline void * phys_to_virt(unsigned long address) { return __va(address); } /* * Change "struct page" to physical address. */ #define page_to_phys(page) ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT) extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); /** * ioremap - map bus memory into CPU space * @offset: bus address of the memory * @size: size of the resource to map * * ioremap performs a platform specific sequence of operations to * make bus memory CPU accessible via the readb/readw/readl/writeb/ * writew/writel functions and the other mmio helpers. The returned * address is not guaranteed to be usable directly as a virtual * address. */ static inline void __iomem * ioremap(unsigned long offset, unsigned long size) { return __ioremap(offset, size, 0); } extern void __iomem * ioremap_nocache(unsigned long offset, unsigned long size); extern void iounmap(volatile void __iomem *addr); /* * bt_ioremap() and bt_iounmap() are for temporary early boot-time * mappings, before the real ioremap() is functional. * A boot-time mapping is currently limited to at most 16 pages. */ extern void *bt_ioremap(unsigned long offset, unsigned long size); extern void bt_iounmap(void *addr, unsigned long size); /* Use early IO mappings for DMI because it's initialized early */ #define dmi_ioremap bt_ioremap #define dmi_iounmap bt_iounmap #define dmi_alloc alloc_bootmem /* * 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 unsigned char readb(const volatile void __iomem *addr) { return *(volatile unsigned char __force *) addr; } static inline unsigned short readw(const volatile void __iomem *addr) { return *(volatile unsigned short __force *) addr; } static inline unsigned int readl(const volatile void __iomem *addr) { return *(volatile unsigned int __force *) addr; } #define readb_relaxed(addr) readb(addr) #define readw_relaxed(addr) readw(addr) #define readl_relaxed(addr) readl(addr) #define __raw_readb readb #define __raw_readw readw #define __raw_readl readl static inline void writeb(unsigned char b, volatile void __iomem *addr) { *(volatile unsigned char __force *) addr = b; } static inline void writew(unsigned short b, volatile void __iomem *addr) { *(volatile unsigned short __force *) addr = b; } static inline void writel(unsigned int b, volatile void __iomem *addr) { *(volatile unsigned int __force *) addr = b; } #define __raw_writeb writeb #define __raw_writew writew #define __raw_writel writel #define mmiowb() static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) { memset((void __force *) addr, val, count); } static inline void memcpy_fromio(void *dst, const volatile void __iomem *src, int count) { __memcpy(dst, (void __force *) src, count); } static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int count) { __memcpy((void __force *) dst, src, count); } /* * 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)) #define isa_readb(a) readb(__ISA_IO_base + (a)) #define isa_readw(a) readw(__ISA_IO_base + (a)) #define isa_readl(a) readl(__ISA_IO_base + (a)) #define isa_writeb(b,a) writeb(b,__ISA_IO_base + (a)) #define isa_writew(w,a) writew(w,__ISA_IO_base + (a)) #define isa_writel(l,a) writel(l,__ISA_IO_base + (a)) #define isa_memset_io(a,b,c) memset_io(__ISA_IO_base + (a),(b),(c)) #define isa_memcpy_fromio(a,b,c) memcpy_fromio((a),__ISA_IO_base + (b),(c)) #define isa_memcpy_toio(a,b,c) memcpy_toio(__ISA_IO_base + (a),(b),(c)) /* * Again, i386 does not require mem IO specific function. */ #define eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void __force *)(b),(c),(d)) #define isa_eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(void __force *)(__ISA_IO_base + (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(volatile 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; } /* * Cache management * * This needed for two cases * 1. Out of order aware processors * 2. Accidentally out of order processors (PPro errata #51) */ #if defined(CONFIG_X86_OOSTORE) || defined(CONFIG_X86_PPRO_FENCE) static inline void flush_write_buffers(void) { __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory"); } #define dma_cache_inv(_start,_size) flush_write_buffers() #define dma_cache_wback(_start,_size) flush_write_buffers() #define dma_cache_wback_inv(_start,_size) flush_write_buffers() #else /* 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() #endif #endif /* __KERNEL__ */ #ifdef SLOW_IO_BY_JUMPING #define __SLOW_DOWN_IO "jmp 1f; 1: jmp 1f; 1:" #else #define __SLOW_DOWN_IO "outb %%al,$0x80;" #endif static inline void slow_down_io(void) { __asm__ __volatile__( __SLOW_DOWN_IO #ifdef REALLY_SLOW_IO __SLOW_DOWN_IO __SLOW_DOWN_IO __SLOW_DOWN_IO #endif : : ); } #ifdef CONFIG_X86_NUMAQ extern void *xquad_portio; /* Where the IO area was mapped */ #define XQUAD_PORT_ADDR(port, quad) (xquad_portio + (XQUAD_PORTIO_QUAD*quad) + port) #define __BUILDIO(bwl,bw,type) \ static inline void out##bwl##_quad(unsigned type value, int port, int quad) { \ if (xquad_portio) \ write##bwl(value, XQUAD_PORT_ADDR(port, quad)); \ else \ out##bwl##_local(value, port); \ } \ static inline void out##bwl(unsigned type value, int port) { \ out##bwl##_quad(value, port, 0); \ } \ static inline unsigned type in##bwl##_quad(int port, int quad) { \ if (xquad_portio) \ return read##bwl(XQUAD_PORT_ADDR(port, quad)); \ else \ return in##bwl##_local(port); \ } \ static inline unsigned type in##bwl(int port) { \ return in##bwl##_quad(port, 0); \ } #else #define __BUILDIO(bwl,bw,type) \ static inline void out##bwl(unsigned type value, int port) { \ out##bwl##_local(value, port); \ } \ static inline unsigned type in##bwl(int port) { \ return in##bwl##_local(port); \ } #endif #define BUILDIO(bwl,bw,type) \ static inline void out##bwl##_local(unsigned type value, int port) { \ __asm__ __volatile__("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port)); \ } \ static inline unsigned type in##bwl##_local(int port) { \ unsigned type value; \ __asm__ __volatile__("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port)); \ return value; \ } \ static inline void out##bwl##_local_p(unsigned type value, int port) { \ out##bwl##_local(value, port); \ slow_down_io(); \ } \ static inline unsigned type in##bwl##_local_p(int port) { \ unsigned type value = in##bwl##_local(port); \ slow_down_io(); \ return value; \ } \ __BUILDIO(bwl,bw,type) \ static inline void out##bwl##_p(unsigned type value, int port) { \ out##bwl(value, port); \ slow_down_io(); \ } \ static inline unsigned type in##bwl##_p(int port) { \ unsigned type value = in##bwl(port); \ slow_down_io(); \ return value; \ } \ static inline void outs##bwl(int port, const void *addr, unsigned long count) { \ __asm__ __volatile__("rep; outs" #bwl : "+S"(addr), "+c"(count) : "d"(port)); \ } \ static inline void ins##bwl(int port, void *addr, unsigned long count) { \ __asm__ __volatile__("rep; ins" #bwl : "+D"(addr), "+c"(count) : "d"(port)); \ } BUILDIO(b,b,char) BUILDIO(w,w,short) BUILDIO(l,,int) #endif