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@ -25,32 +25,32 @@ |
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#include <linux/module.h> |
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int hwreg_present( volatile void *regp ) |
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int hwreg_present(volatile void *regp) |
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{ |
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int ret = 0; |
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unsigned long flags; |
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long save_sp, save_vbr; |
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long tmp_vectors[3]; |
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int ret = 0; |
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unsigned long flags; |
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long save_sp, save_vbr; |
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long tmp_vectors[3]; |
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local_irq_save(flags); |
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__asm__ __volatile__ |
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( "movec %/vbr,%2\n\t" |
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"movel #Lberr1,%4@(8)\n\t" |
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"movec %4,%/vbr\n\t" |
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"movel %/sp,%1\n\t" |
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"moveq #0,%0\n\t" |
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"tstb %3@\n\t" |
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local_irq_save(flags); |
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__asm__ __volatile__ ( |
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"movec %/vbr,%2\n\t" |
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"movel #Lberr1,%4@(8)\n\t" |
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"movec %4,%/vbr\n\t" |
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"movel %/sp,%1\n\t" |
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"moveq #0,%0\n\t" |
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"tstb %3@\n\t" |
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"nop\n\t" |
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"moveq #1,%0\n" |
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"Lberr1:\n\t" |
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"movel %1,%/sp\n\t" |
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"movec %2,%/vbr" |
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"moveq #1,%0\n" |
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"Lberr1:\n\t" |
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"movel %1,%/sp\n\t" |
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"movec %2,%/vbr" |
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: "=&d" (ret), "=&r" (save_sp), "=&r" (save_vbr) |
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: "a" (regp), "a" (tmp_vectors) |
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); |
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local_irq_restore(flags); |
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); |
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local_irq_restore(flags); |
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return( ret ); |
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return ret; |
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} |
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EXPORT_SYMBOL(hwreg_present); |
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@ -58,34 +58,36 @@ EXPORT_SYMBOL(hwreg_present); |
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* by a bus error handler. Returns 1 if successful, 0 otherwise. |
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*/ |
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int hwreg_write( volatile void *regp, unsigned short val ) |
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int hwreg_write(volatile void *regp, unsigned short val) |
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{ |
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int ret; |
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int ret; |
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unsigned long flags; |
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long save_sp, save_vbr; |
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long tmp_vectors[3]; |
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long save_sp, save_vbr; |
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long tmp_vectors[3]; |
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local_irq_save(flags); |
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__asm__ __volatile__ |
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( "movec %/vbr,%2\n\t" |
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"movel #Lberr2,%4@(8)\n\t" |
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"movec %4,%/vbr\n\t" |
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"movel %/sp,%1\n\t" |
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"moveq #0,%0\n\t" |
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"movew %5,%3@\n\t" |
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"nop \n\t" /* If this nop isn't present, 'ret' may already be
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* loaded with 1 at the time the bus error |
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* happens! */ |
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"moveq #1,%0\n" |
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__asm__ __volatile__ ( |
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"movec %/vbr,%2\n\t" |
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"movel #Lberr2,%4@(8)\n\t" |
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"movec %4,%/vbr\n\t" |
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"movel %/sp,%1\n\t" |
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"moveq #0,%0\n\t" |
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"movew %5,%3@\n\t" |
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"nop\n\t" |
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/*
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* If this nop isn't present, 'ret' may already be loaded |
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* with 1 at the time the bus error happens! |
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*/ |
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"moveq #1,%0\n" |
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"Lberr2:\n\t" |
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"movel %1,%/sp\n\t" |
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"movec %2,%/vbr" |
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"movel %1,%/sp\n\t" |
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"movec %2,%/vbr" |
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: "=&d" (ret), "=&r" (save_sp), "=&r" (save_vbr) |
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: "a" (regp), "a" (tmp_vectors), "g" (val) |
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); |
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local_irq_restore(flags); |
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return( ret ); |
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return ret; |
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} |
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EXPORT_SYMBOL(hwreg_write); |
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