0055fe66d5
This avoids 32-bit access which might affect other registers. The linux code uses gcc flags to get this to happen, but this seems like more of a sure thing.
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "input.h"
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#include "scrnintstr.h"
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#include "compiler.h"
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#include "xf86OSpriv.h"
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#include <machine/bwx.h>
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/*
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* The following functions are used only on EV56 and greater CPUs,
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* and the assembler requires going to EV56 mode in order to emit
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* these instructions.
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*/
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__asm(".arch ev56");
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int readDense8(pointer Base, register unsigned long Offset);
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int readDense16(pointer Base, register unsigned long Offset);
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int readDense32(pointer Base, register unsigned long Offset);
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void
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writeDenseNB8(int Value, pointer Base, register unsigned long Offset);
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void
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writeDenseNB16(int Value, pointer Base, register unsigned long Offset);
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void
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writeDenseNB32(int Value, pointer Base, register unsigned long Offset);
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void
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writeDense8(int Value, pointer Base, register unsigned long Offset);
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void
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writeDense16(int Value, pointer Base, register unsigned long Offset);
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void
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writeDense32(int Value, pointer Base, register unsigned long Offset);
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int
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readDense8(pointer Base, register unsigned long Offset)
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{
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mem_barrier();
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return (alpha_ldbu((pointer)((unsigned long)Base+(Offset))));
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}
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int
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readDense16(pointer Base, register unsigned long Offset)
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{
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mem_barrier();
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return (alpha_ldwu((pointer)((unsigned long)Base+(Offset))));
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}
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int
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readDense32(pointer Base, register unsigned long Offset)
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{
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mem_barrier();
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return *(volatile CARD32*)((unsigned long)Base+(Offset));
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}
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void
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writeDenseNB8(int Value, pointer Base, register unsigned long Offset)
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{
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alpha_stb((pointer)((unsigned long)Base+(Offset)), Value);
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}
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void
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writeDenseNB16(int Value, pointer Base, register unsigned long Offset)
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{
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alpha_stw((pointer)((unsigned long)Base + (Offset)), Value);
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}
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void
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writeDenseNB32(int Value, pointer Base, register unsigned long Offset)
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{
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*(volatile CARD32*)((unsigned long)Base+(Offset)) = Value;
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}
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void
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writeDense8(int Value, pointer Base, register unsigned long Offset)
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{
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write_mem_barrier();
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alpha_stb((pointer)((unsigned long)Base+(Offset)), Value);
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}
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void
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writeDense16(int Value, pointer Base, register unsigned long Offset)
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{
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write_mem_barrier();
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alpha_stw((pointer)((unsigned long)Base + (Offset)), Value);
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}
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void
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writeDense32(int Value, pointer Base, register unsigned long Offset)
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{
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write_mem_barrier();
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*(volatile CARD32 *)((unsigned long)Base+(Offset)) = Value;
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}
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