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Diffstat (limited to 'include/asm-mips/io.h')
| -rw-r--r-- | include/asm-mips/io.h | 492 |
1 files changed, 0 insertions, 492 deletions
diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h deleted file mode 100644 index 025012a..0000000 --- a/include/asm-mips/io.h +++ /dev/null @@ -1,492 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 1994, 1995 Waldorf GmbH - * Copyright (C) 1994 - 2000 Ralf Baechle - * Copyright (C) 1999, 2000 Silicon Graphics, Inc. - * Copyright (C) 2000 FSMLabs, Inc. - */ -#ifndef _ASM_IO_H -#define _ASM_IO_H - -#include <linux/config.h> -#if 0 -#include <linux/pagemap.h> -#endif -#include <asm/addrspace.h> -#include <asm/byteorder.h> - -/* - * Slowdown I/O port space accesses for antique hardware. - */ -#undef CONF_SLOWDOWN_IO - -/* - * Sane hardware offers swapping of I/O space accesses in hardware; less - * sane hardware forces software to fiddle with this ... - */ -#if defined(CONFIG_SWAP_IO_SPACE) && defined(__MIPSEB__) - -#define __ioswab8(x) (x) -#define __ioswab16(x) swab16(x) -#define __ioswab32(x) swab32(x) - -#else - -#define __ioswab8(x) (x) -#define __ioswab16(x) (x) -#define __ioswab32(x) (x) - -#endif - -/* - * This file contains the definitions for the MIPS counterpart of the - * x86 in/out instructions. This heap of macros and C results in much - * better code than the approach of doing it in plain C. The macros - * result in code that is to fast for certain hardware. On the other - * side the performance of the string functions should be improved for - * sake of certain devices like EIDE disks that do highspeed polled I/O. - * - * Ralf - * - * 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. - */ - -/* - * On MIPS I/O ports are memory mapped, so we access them using normal - * load/store instructions. mips_io_port_base is the virtual address to - * which all ports are being mapped. For sake of efficiency some code - * assumes that this is an address that can be loaded with a single lui - * instruction, so the lower 16 bits must be zero. Should be true on - * on any sane architecture; generic code does not use this assumption. - */ -extern const unsigned long mips_io_port_base; - -/* - * Gcc will generate code to load the value of mips_io_port_base after each - * function call which may be fairly wasteful in some cases. So we don't - * play quite by the book. We tell gcc mips_io_port_base is a long variable - * which solves the code generation issue. Now we need to violate the - * aliasing rules a little to make initialization possible and finally we - * will need the barrier() to fight side effects of the aliasing chat. - * This trickery will eventually collapse under gcc's optimizer. Oh well. - */ -static inline void set_io_port_base(unsigned long base) -{ - * (unsigned long *) &mips_io_port_base = base; -} - -/* - * 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 - * - */ - -#define __SLOW_DOWN_IO \ - __asm__ __volatile__( \ - "sb\t$0,0x80(%0)" \ - : : "r" (mips_io_port_base)); - -#ifdef CONF_SLOWDOWN_IO -#ifdef REALLY_SLOW_IO -#define SLOW_DOWN_IO { __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; __SLOW_DOWN_IO; } -#else -#define SLOW_DOWN_IO __SLOW_DOWN_IO -#endif -#else -#define SLOW_DOWN_IO -#endif - -/* - * Change virtual addresses to physical addresses and vv. - * These are trivial on the 1:1 Linux/MIPS mapping - */ -extern inline phys_addr_t virt_to_phys(volatile void * address) -{ - return CPHYSADDR(address); -} - -extern inline void * phys_to_virt(unsigned long address) -{ - return (void *)KSEG0ADDR(address); -} - -/* - * IO bus memory addresses are also 1:1 with the physical address - */ -extern inline unsigned long virt_to_bus(volatile void * address) -{ - return CPHYSADDR(address); -} - -extern inline void * bus_to_virt(unsigned long address) -{ - return (void *)KSEG0ADDR(address); -} - -/* - * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped - * for the processor. - */ -extern unsigned long isa_slot_offset; - -extern void * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); - -#if 0 -extern inline void *ioremap(unsigned long offset, unsigned long size) -{ - return __ioremap(offset, size, _CACHE_UNCACHED); -} - -extern inline void *ioremap_nocache(unsigned long offset, unsigned long size) -{ - return __ioremap(offset, size, _CACHE_UNCACHED); -} - -extern void iounmap(void *addr); -#endif - -/* - * XXX We need system specific versions of these to handle EISA address bits - * 24-31 on SNI. - * XXX more SNI hacks. - */ -#define readb(addr) (*(volatile unsigned char *)(addr)) -#define readw(addr) __ioswab16((*(volatile unsigned short *)(addr))) -#define readl(addr) __ioswab32((*(volatile unsigned int *)(addr))) -#define __raw_readb readb -#define __raw_readw readw -#define __raw_readl readl - -#define writeb(b,addr) (*(volatile unsigned char *)(addr)) = (b) -#define writew(b,addr) (*(volatile unsigned short *)(addr)) = (__ioswab16(b)) -#define writel(b,addr) (*(volatile unsigned int *)(addr)) = (__ioswab32(b)) -#define __raw_writeb writeb -#define __raw_writew writew -#define __raw_writel writel - -#define memset_io(a,b,c) memset((void *)(a),(b),(c)) -#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) -#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) - -/* END SNI HACKS ... */ - -/* - * ISA space is 'always mapped' on currently supported MIPS systems, 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 *)(PAGE_OFFSET)) - -#define isa_readb(a) readb(a) -#define isa_readw(a) readw(a) -#define isa_readl(a) readl(a) -#define isa_writeb(b,a) writeb(b,a) -#define isa_writew(w,a) writew(w,a) -#define isa_writel(l,a) writel(l,a) - -#define isa_memset_io(a,b,c) memset_io((a),(b),(c)) -#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a),(b),(c)) -#define isa_memcpy_toio(a,b,c) memcpy_toio((a),(b),(c)) - -/* - * We don't have csum_partial_copy_fromio() yet, so we cheat here and - * just copy it. The net code will then do the checksum later. - */ -#define eth_io_copy_and_sum(skb,src,len,unused) memcpy_fromio((skb)->data,(src),(len)) -#define isa_eth_io_copy_and_sum(a,b,c,d) eth_copy_and_sum((a),(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; -} -#define isa_check_signature(io, s, l) check_signature(i,s,l) - -/* - * Talk about misusing macros.. - */ - -#define __OUT1(s) \ -extern inline void __out##s(unsigned int value, unsigned int port) { - -#define __OUT2(m) \ -__asm__ __volatile__ ("s" #m "\t%0,%1(%2)" - -#define __OUT(m,s,w) \ -__OUT1(s) __OUT2(m) : : "r" (__ioswab##w(value)), "i" (0), "r" (mips_io_port_base+port)); } \ -__OUT1(s##c) __OUT2(m) : : "r" (__ioswab##w(value)), "ir" (port), "r" (mips_io_port_base)); } \ -__OUT1(s##_p) __OUT2(m) : : "r" (__ioswab##w(value)), "i" (0), "r" (mips_io_port_base+port)); \ - SLOW_DOWN_IO; } \ -__OUT1(s##c_p) __OUT2(m) : : "r" (__ioswab##w(value)), "ir" (port), "r" (mips_io_port_base)); \ - SLOW_DOWN_IO; } - -#define __IN1(t,s) \ -extern __inline__ t __in##s(unsigned int port) { t _v; - -/* - * Required nops will be inserted by the assembler - */ -#define __IN2(m) \ -__asm__ __volatile__ ("l" #m "\t%0,%1(%2)" - -#define __IN(t,m,s,w) \ -__IN1(t,s) __IN2(m) : "=r" (_v) : "i" (0), "r" (mips_io_port_base+port)); return __ioswab##w(_v); } \ -__IN1(t,s##c) __IN2(m) : "=r" (_v) : "ir" (port), "r" (mips_io_port_base)); return __ioswab##w(_v); } \ -__IN1(t,s##_p) __IN2(m) : "=r" (_v) : "i" (0), "r" (mips_io_port_base+port)); SLOW_DOWN_IO; return __ioswab##w(_v); } \ -__IN1(t,s##c_p) __IN2(m) : "=r" (_v) : "ir" (port), "r" (mips_io_port_base)); SLOW_DOWN_IO; return __ioswab##w(_v); } - -#define __INS1(s) \ -extern inline void __ins##s(unsigned int port, void * addr, unsigned long count) { - -#define __INS2(m) \ -if (count) \ -__asm__ __volatile__ ( \ - ".set\tnoreorder\n\t" \ - ".set\tnoat\n" \ - "1:\tl" #m "\t$1,%4(%5)\n\t" \ - "subu\t%1,1\n\t" \ - "s" #m "\t$1,(%0)\n\t" \ - "bne\t$0,%1,1b\n\t" \ - "addiu\t%0,%6\n\t" \ - ".set\tat\n\t" \ - ".set\treorder" - -#define __INS(m,s,i) \ -__INS1(s) __INS2(m) \ - : "=r" (addr), "=r" (count) \ - : "0" (addr), "1" (count), "i" (0), \ - "r" (mips_io_port_base+port), "I" (i) \ - : "$1");} \ -__INS1(s##c) __INS2(m) \ - : "=r" (addr), "=r" (count) \ - : "0" (addr), "1" (count), "ir" (port), \ - "r" (mips_io_port_base), "I" (i) \ - : "$1");} - -#define __OUTS1(s) \ -extern inline void __outs##s(unsigned int port, const void * addr, unsigned long count) { - -#define __OUTS2(m) \ -if (count) \ -__asm__ __volatile__ ( \ - ".set\tnoreorder\n\t" \ - ".set\tnoat\n" \ - "1:\tl" #m "\t$1,(%0)\n\t" \ - "subu\t%1,1\n\t" \ - "s" #m "\t$1,%4(%5)\n\t" \ - "bne\t$0,%1,1b\n\t" \ - "addiu\t%0,%6\n\t" \ - ".set\tat\n\t" \ - ".set\treorder" - -#define __OUTS(m,s,i) \ -__OUTS1(s) __OUTS2(m) \ - : "=r" (addr), "=r" (count) \ - : "0" (addr), "1" (count), "i" (0), "r" (mips_io_port_base+port), "I" (i) \ - : "$1");} \ -__OUTS1(s##c) __OUTS2(m) \ - : "=r" (addr), "=r" (count) \ - : "0" (addr), "1" (count), "ir" (port), "r" (mips_io_port_base), "I" (i) \ - : "$1");} - -__IN(unsigned char,b,b,8) -__IN(unsigned short,h,w,16) -__IN(unsigned int,w,l,32) - -__OUT(b,b,8) -__OUT(h,w,16) -__OUT(w,l,32) - -__INS(b,b,1) -__INS(h,w,2) -__INS(w,l,4) - -__OUTS(b,b,1) -__OUTS(h,w,2) -__OUTS(w,l,4) - - -/* - * Note that due to the way __builtin_constant_p() works, you - * - can't use it inside an inline function (it will never be true) - * - you don't have to worry about side effects within the __builtin.. - */ -#define outb(val,port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outbc((val),(port)) : \ - __outb((val),(port))) - -#define inb(port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inbc(port) : \ - __inb(port)) - -#define outb_p(val,port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outbc_p((val),(port)) : \ - __outb_p((val),(port))) - -#define inb_p(port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inbc_p(port) : \ - __inb_p(port)) - -#define outw(val,port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outwc((val),(port)) : \ - __outw((val),(port))) - -#define inw(port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inwc(port) : \ - __inw(port)) - -#define outw_p(val,port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outwc_p((val),(port)) : \ - __outw_p((val),(port))) - -#define inw_p(port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inwc_p(port) : \ - __inw_p(port)) - -#define outl(val,port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outlc((val),(port)) : \ - __outl((val),(port))) - -#define inl(port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inlc(port) : \ - __inl(port)) - -#define outl_p(val,port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outlc_p((val),(port)) : \ - __outl_p((val),(port))) - -#define inl_p(port) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inlc_p(port) : \ - __inl_p(port)) - - -#define outsb(port,addr,count) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outsbc((port),(addr),(count)) : \ - __outsb ((port),(addr),(count))) - -#define insb(port,addr,count) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __insbc((port),(addr),(count)) : \ - __insb((port),(addr),(count))) - -#define outsw(port,addr,count) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outswc((port),(addr),(count)) : \ - __outsw ((port),(addr),(count))) - -#define insw(port,addr,count) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inswc((port),(addr),(count)) : \ - __insw((port),(addr),(count))) - -#define outsl(port,addr,count) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __outslc((port),(addr),(count)) : \ - __outsl ((port),(addr),(count))) - -#define insl(port,addr,count) \ -((__builtin_constant_p((port)) && (port) < 32768) ? \ - __inslc((port),(addr),(count)) : \ - __insl((port),(addr),(count))) - -#define IO_SPACE_LIMIT 0xffff - -/* - * 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 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_wback(start, size) makes caches and 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. - */ -extern void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size); -extern void (*_dma_cache_wback)(unsigned long start, unsigned long size); -extern void (*_dma_cache_inv)(unsigned long start, unsigned long size); - -#define dma_cache_wback_inv(start,size) _dma_cache_wback_inv(start,size) -#define dma_cache_wback(start,size) _dma_cache_wback(start,size) -#define dma_cache_inv(start,size) _dma_cache_inv(start,size) - -static inline void sync(void) -{ -} - -/* - * Given a physical address and a length, return a virtual address - * that can be used to access the memory range with the caching - * properties specified by "flags". - */ -#define MAP_NOCACHE (0) -#define MAP_WRCOMBINE (0) -#define MAP_WRBACK (0) -#define MAP_WRTHROUGH (0) - -static inline void * -map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) -{ - return (void *)paddr; -} - -/* - * Take down a mapping set up by map_physmem(). - */ -static inline void unmap_physmem(void *vaddr, unsigned long flags) -{ - -} - -#endif /* _ASM_IO_H */ |