56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
#ifndef __ASM_SANDBOX_IO_H
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#define __ASM_SANDBOX_IO_H
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#define build_mmio_read(name, size, type, reg, barrier) \
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static inline type name(const volatile void *addr) \
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{ type ret; asm volatile("mov" size " %1,%0":reg (ret) \
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:"m" (*(volatile type*)addr) barrier); return ret; }
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build_mmio_read(readb, "b", unsigned char, "=q", :"memory")
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build_mmio_read(readw, "w", unsigned short, "=r", :"memory")
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build_mmio_read(readl, "l", unsigned int, "=r", :"memory")
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#define build_mmio_write(name, size, type, reg, barrier) \
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static inline void name(type val, volatile void *addr) \
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{ asm volatile("mov" size " %0,%1": :reg (val), \
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"m" (*(volatile type*)addr) barrier); }
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build_mmio_write(writeb, "b", unsigned char, "q", :"memory")
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build_mmio_write(writew, "w", unsigned short, "r", :"memory")
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build_mmio_write(writel, "l", unsigned int, "r", :"memory")
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#define BUILDIO(bwl, bw, type) \
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static inline void out##bwl(unsigned type value, int port) \
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{ \
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asm volatile("out" #bwl " %" #bw "0, %w1" \
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: : "a"(value), "Nd"(port)); \
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} \
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\
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static inline unsigned type in##bwl(int port) \
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{ \
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unsigned type value; \
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asm volatile("in" #bwl " %w1, %" #bw "0" \
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: "=a"(value) : "Nd"(port)); \
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return value; \
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} \
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\
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static inline void outs##bwl(int port, const void *addr, unsigned long count) \
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{ \
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asm volatile("rep; outs" #bwl \
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: "+S"(addr), "+c"(count) : "d"(port)); \
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} \
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\
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static inline void ins##bwl(int port, void *addr, unsigned long count) \
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{ \
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asm volatile("rep; ins" #bwl \
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: "+D"(addr), "+c"(count) : "d"(port)); \
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}
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BUILDIO(b, b, char)
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BUILDIO(w, w, short)
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BUILDIO(l, , int)
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#define IO_SPACE_LIMIT 0xffff
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#endif /* __ASM_SANDBOX_IO_H */
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