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1276 |
phoenix |
/*
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* linux/include/asm-arm/arch-shark/io.h
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*
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* by Alexander Schulz
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*
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* derived from:
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* linux/include/asm-arm/arch-ebsa110/io.h
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* Copyright (C) 1997,1998 Russell King
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*/
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#ifndef __ASM_ARM_ARCH_IO_H
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#define __ASM_ARM_ARCH_IO_H
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#define iomem_valid_addr(off,sz) (1)
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#define iomem_to_phys(off) (off)
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#define IO_SPACE_LIMIT 0xffffffff
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/*
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* We use two different types of addressing - PC style addresses, and ARM
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* addresses. PC style accesses the PC hardware with the normal PC IO
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* addresses, eg 0x3f8 for serial#1. ARM addresses are 0x80000000+
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* and are translated to the start of IO.
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*/
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#define __PORT_PCIO(x) (!((x) & 0x80000000))
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/*
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* Dynamic IO functions - let the compiler
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* optimize the expressions
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*/
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#define DECLARE_DYN_OUT(fnsuffix,instr) \
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static inline void __out##fnsuffix (unsigned int value, unsigned int port) \
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{ \
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unsigned long temp; \
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__asm__ __volatile__( \
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"tst %2, #0x80000000\n\t" \
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"mov %0, %4\n\t" \
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"addeq %0, %0, %3\n\t" \
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"str" instr " %1, [%0, %2] @ out" #fnsuffix \
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: "=&r" (temp) \
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: "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \
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: "cc"); \
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}
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#define DECLARE_DYN_IN(sz,fnsuffix,instr) \
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static inline unsigned sz __in##fnsuffix (unsigned int port) \
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{ \
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unsigned long temp, value; \
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__asm__ __volatile__( \
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"tst %2, #0x80000000\n\t" \
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"mov %0, %4\n\t" \
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"addeq %0, %0, %3\n\t" \
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"ldr" instr " %1, [%0, %2] @ in" #fnsuffix \
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: "=&r" (temp), "=r" (value) \
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: "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \
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: "cc"); \
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return (unsigned sz)value; \
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}
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static inline unsigned int __ioaddr (unsigned int port) \
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{ \
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if (__PORT_PCIO(port)) \
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return (unsigned int)(PCIO_BASE + (port)); \
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else \
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return (unsigned int)(IO_BASE + (port)); \
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}
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#define DECLARE_IO(sz,fnsuffix,instr) \
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DECLARE_DYN_OUT(fnsuffix,instr) \
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DECLARE_DYN_IN(sz,fnsuffix,instr)
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DECLARE_IO(char,b,"b")
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DECLARE_IO(short,w,"h")
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DECLARE_IO(long,l,"")
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#undef DECLARE_IO
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#undef DECLARE_DYN_OUT
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#undef DECLARE_DYN_IN
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/*
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* Constant address IO functions
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*
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* These have to be macros for the 'J' constraint to work -
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* +/-4096 immediate operand.
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*/
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#define __outbc(value,port) \
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({ \
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if (__PORT_PCIO((port))) \
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__asm__ __volatile__( \
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"strb %0, [%1, %2] @ outbc" \
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: : "r" (value), "r" (PCIO_BASE), "Jr" (port)); \
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else \
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__asm__ __volatile__( \
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"strb %0, [%1, %2] @ outbc" \
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: : "r" (value), "r" (IO_BASE), "r" (port)); \
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})
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#define __inbc(port) \
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({ \
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unsigned char result; \
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if (__PORT_PCIO((port))) \
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__asm__ __volatile__( \
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"ldrb %0, [%1, %2] @ inbc" \
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: "=r" (result) : "r" (PCIO_BASE), "Jr" (port)); \
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else \
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__asm__ __volatile__( \
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"ldrb %0, [%1, %2] @ inbc" \
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: "=r" (result) : "r" (IO_BASE), "r" (port)); \
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result; \
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})
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#define __outwc(value,port) \
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({ \
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unsigned long v = value; \
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if (__PORT_PCIO((port))) \
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__asm__ __volatile__( \
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"strh %0, [%1, %2] @ outwc" \
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: : "r" (v|v<<16), "r" (PCIO_BASE), "Jr" (port)); \
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else \
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__asm__ __volatile__( \
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"strh %0, [%1, %2] @ outwc" \
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: : "r" (v|v<<16), "r" (IO_BASE), "r" (port)); \
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})
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#define __inwc(port) \
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({ \
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unsigned short result; \
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if (__PORT_PCIO((port))) \
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__asm__ __volatile__( \
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"ldrh %0, [%1, %2] @ inwc" \
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: "=r" (result) : "r" (PCIO_BASE), "Jr" (port)); \
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else \
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__asm__ __volatile__( \
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"ldrh %0, [%1, %2] @ inwc" \
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: "=r" (result) : "r" (IO_BASE), "r" (port)); \
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result & 0xffff; \
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})
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#define __outlc(value,port) \
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({ \
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unsigned long v = value; \
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if (__PORT_PCIO((port))) \
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__asm__ __volatile__( \
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"str %0, [%1, %2] @ outlc" \
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: : "r" (v), "r" (PCIO_BASE), "Jr" (port)); \
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else \
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__asm__ __volatile__( \
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"str %0, [%1, %2] @ outlc" \
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: : "r" (v), "r" (IO_BASE), "r" (port)); \
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})
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#define __inlc(port) \
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({ \
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unsigned long result; \
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if (__PORT_PCIO((port))) \
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__asm__ __volatile__( \
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"ldr %0, [%1, %2] @ inlc" \
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: "=r" (result) : "r" (PCIO_BASE), "Jr" (port)); \
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else \
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__asm__ __volatile__( \
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"ldr %0, [%1, %2] @ inlc" \
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: "=r" (result) : "r" (IO_BASE), "r" (port)); \
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result; \
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})
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#define __ioaddrc(port) \
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({ \
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unsigned long addr; \
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if (__PORT_PCIO((port))) \
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addr = PCIO_BASE + (port); \
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else \
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addr = IO_BASE + (port); \
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addr; \
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})
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#define __mem_pci(addr) addr
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#define inb(p) (__builtin_constant_p((p)) ? __inbc(p) : __inb(p))
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#define inw(p) (__builtin_constant_p((p)) ? __inwc(p) : __inw(p))
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#define inl(p) (__builtin_constant_p((p)) ? __inlc(p) : __inl(p))
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#define outb(v,p) (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
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#define outw(v,p) (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
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#define outl(v,p) (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
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#define __arch_getw(addr) (*(volatile unsigned short *)(addr))
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#define __arch_putw(b,addr) (*(volatile unsigned short *)(addr) = (b))
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/*
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* Translated address IO functions
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*
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* IO address has already been translated to a virtual address
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*/
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#define outb_t(v,p) \
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(*(volatile unsigned char *)(p) = (v))
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#define inb_t(p) \
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(*(volatile unsigned char *)(p))
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#define outl_t(v,p) \
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(*(volatile unsigned long *)(p) = (v))
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#define inl_t(p) \
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(*(volatile unsigned long *)(p))
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#endif
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