mirror of https://gitee.com/openkylin/linux.git
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/*
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* linux/include/asm-arm/arch-l7200/io.h
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*
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* Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
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*
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* Changelog:
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* 03-21-2000 SJH Created from linux/include/asm-arm/arch-nexuspci/io.h
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* 08-31-2000 SJH Added in IO functions necessary for new drivers
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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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#include <asm/hardware.h>
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#define IO_SPACE_LIMIT 0xffffffff
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/*
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* There are not real ISA nor PCI buses, so we fake it.
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*/
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#define __io_pci(a) ((void __iomem *)(PCIO_BASE + (a)))
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#define __mem_pci(a) (a)
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#define __mem_isa(a) (a)
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#define __ioaddr(p) __io_pci(p)
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/*
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* Generic virtual read/write
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*/
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#define __arch_getb(a) (*(volatile unsigned char *)(a))
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#define __arch_getl(a) (*(volatile unsigned int *)(a))
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static inline unsigned int __arch_getw(unsigned long a)
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{
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unsigned int value;
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__asm__ __volatile__("ldr%?h %0, [%1, #0] @ getw"
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: "=&r" (value)
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: "r" (a));
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return value;
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}
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#define __arch_putb(v,a) (*(volatile unsigned char *)(a) = (v))
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#define __arch_putl(v,a) (*(volatile unsigned int *)(a) = (v))
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static inline void __arch_putw(unsigned int value, unsigned long a)
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{
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__asm__ __volatile__("str%?h %0, [%1, #0] @ putw"
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: : "r" (value), "r" (a));
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}
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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) (*(volatile unsigned char *)(p) = (v))
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#define inb_t(p) (*(volatile unsigned char *)(p))
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#define outw_t(v,p) (*(volatile unsigned int *)(p) = (v))
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#define inw_t(p) (*(volatile unsigned int *)(p))
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#define outl_t(v,p) (*(volatile unsigned long *)(p) = (v))
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#define inl_t(p) (*(volatile unsigned long *)(p))
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/*
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* FIXME - These are to allow for linking. On all the other
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* ARM platforms, the entire IO space is contiguous.
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* The 7200 has three separate IO spaces. The below
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* macros will eventually become more involved. Use
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* with caution and don't be surprised by kernel oopses!!!
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*/
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#define inb(p) inb_t(p)
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#define inw(p) inw_t(p)
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#define inl(p) inl_t(p)
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#define outb(v,p) outb_t(v,p)
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#define outw(v,p) outw_t(v,p)
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#define outl(v,p) outl_t(v,p)
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#endif
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