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mmio: provide bitsets and test them

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fix #853
This commit is contained in:
Martin Stein
2013-08-23 00:50:08 +02:00
committed by Norman Feske
parent e272264cb2
commit d4e435d732
3 changed files with 177 additions and 4 deletions
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61
base/include/util/mmio.h
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@ -508,6 +508,67 @@ namespace Genode
}
/***********************
** Access to bitsets **
***********************/
/**
* Read bitset 'T' (composed of 2 parts)
*/
template <typename T>
inline typename T::Bitset_2_base::access_t const read()
{
typedef typename T::Bitset_2_base::Bits_0 Bits_0;
typedef typename T::Bitset_2_base::Bits_1 Bits_1;
return read<Bits_0>() |
(read<Bits_1>() << Bits_0::BITFIELD_WIDTH);
}
/**
* Override bitset 'T' (composed of 2 parts)
*
* \param v value that shall be written
*/
template <typename T>
inline void write(typename T::Bitset_2_base::access_t v)
{
typedef typename T::Bitset_2_base::Bits_0 Bits_0;
typedef typename T::Bitset_2_base::Bits_1 Bits_1;
write<Bits_0>(v);
write<Bits_1>(v >> Bits_0::BITFIELD_WIDTH);
}
/**
* Read bitset 'T' (composed of 3 parts)
*/
template <typename T>
inline typename T::Bitset_3_base::access_t const read()
{
typedef typename T::Bitset_3_base::Bits_0 Bits_0;
typedef typename T::Bitset_3_base::Bits_1 Bits_1;
typedef typename T::Bitset_3_base::Bits_2 Bits_2;
return read<Bitset_2<Bits_0, Bits_1> >() |
(read<Bits_2>() << (Bits_0::BITFIELD_WIDTH +
Bits_1::BITFIELD_WIDTH));
}
/**
* Override bitset 'T' (composed of 3 parts)
*
* \param v value that shall be written
*/
template <typename T>
inline void write(typename T::Bitset_3_base::access_t v)
{
typedef typename T::Bitset_3_base::Bits_0 Bits_0;
typedef typename T::Bitset_3_base::Bits_1 Bits_1;
typedef typename T::Bitset_3_base::Bits_2 Bits_2;
write<Bitset_2<Bits_0, Bits_1> >(v);
write<Bits_2>(v >> (Bits_0::BITFIELD_WIDTH +
Bits_1::BITFIELD_WIDTH));
}
/*********************************
** Polling for bitfield states **
*********************************/