31 lines
1.0 KiB
C
31 lines
1.0 KiB
C
/*
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Copyright (c) 2002, Thomas Kurschel
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Part of Radeon driver
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Macros for easier memory mapped I/O access
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*/
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#ifndef _MMIO_H
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#define _MMIO_H
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// read 8-bit register
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#define INREG8( regs, addr ) (*(regs + (addr)))
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// write 8-bit register
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#define OUTREG8( regs, addr, val ) do { *(regs + (addr)) = (val); } while( 0 )
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// read 32-bit register
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#define INREG( regs, addr ) (*((vuint32 *)(regs + (addr))))
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// write 32-bit register
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#define OUTREG( regs, addr, val ) do { *(vuint32 *)(regs + (addr)) = (val); } while( 0 )
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// write partial 32-bit register, keeping bits "mask"
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#define OUTREGP( regs, addr, val, mask ) \
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do { \
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uint32 tmp = INREG( (regs), (addr) ); \
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tmp &= (mask); \
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tmp |= (val) & ~(mask); \
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OUTREG( (regs), (addr), tmp ); \
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} while (0)
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#endif
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