/// <summary>
/// Constructor of a named joined PIC register.
/// </summary>
/// <param name="jsfr">The joined SFR definition.</param>
/// <param name="number">The Reko index number of this register.</param>
/// <param name="subregs">The sub-registers of the joint.</param>
public PICRegisterStorage(IJoinedRegister jsfr, int number, IList <PICRegisterStorage> subregs)
: base(jsfr.Name, number, 0, PrimitiveType.CreateWord(jsfr.BitWidth))
{
Traits = new PICRegisterTraits(jsfr, subregs);
AttachedRegs = subregs.ToList();
AttachedRegs.ForEach(r => r.ParentRegister = this);
ParentRegister = null;
BitFields = new SortedList <PICRegisterBitFieldSortKey, PICRegisterBitFieldStorage>();
}
public PICRegisterContent(PICRegisterTraits traits)
{
this.traits = traits ?? throw new ArgumentNullException(nameof(traits));
}
/// <summary>
/// Constructor of a named PIC register.
/// </summary>
/// <param name="regName">Name of the PIC register.</param>
/// <param name="regNumber">The Reko index number of this register.</param>
/// <param name="bitAddress">The lowest bit address of this register.</param>
/// <param name="dt">The register word type.</param>
/// <param name="traits">The traits of the PIC register.</param>
/// <exception cref="ArgumentNullException">Thrown if <paramref name="traits"/> is null.</exception>
public PICRegisterStorage(string regName, int regNumber, uint bitAddress, PrimitiveType dt, PICRegisterTraits traits)
: base(regName, regNumber, bitAddress, dt)
{
Traits = traits ?? throw new ArgumentNullException(nameof(traits));
AttachedRegs = new List <PICRegisterStorage>();
BitFields = new SortedList <PICRegisterBitFieldSortKey, PICRegisterBitFieldStorage>();
}
/// <summary>
/// Default constructor.
/// </summary>
public PICRegisterStorage() : base("None", -1, 0, PrimitiveType.Byte)
{
Traits = new PICRegisterTraits();
AttachedRegs = null;
BitFields = null;
}
private PICRegisterAccessMasks(PICRegisterTraits traits)
{
string sPOR = traits?.POR ?? new string('0', traits.BitWidth);
string sAccess = traits?.Access ?? new string('n', traits.BitWidth);
ResetValue = 0;
foreach (var c in sPOR)
{
ResetValue <<= 1;
ResetValue |= (c == '1' ? 1U : 0U);
}
ulong fullimpl = ((1UL << traits.BitWidth) - 1UL) & traits.Impl;
ReadOrMask = 0;
ReadAndMask = (uint)fullimpl;
WriteOrMask = 0;
WriteAndMask = (uint)fullimpl;
int bitno = traits.BitWidth - 1;
foreach (char a in sAccess)
{
uint orMask = 1U << bitno;
uint andMask = ~orMask;
switch (a)
{
case '0': // Bit is always 0.
ReadAndMask &= andMask;
WriteAndMask &= andMask;
break;
case '1': // Bit is always 1.
ReadOrMask |= orMask;
WriteOrMask |= orMask;
break;
case '-': // Bit is not implemented. Read as 0.
ReadAndMask &= andMask;
fullimpl &= andMask;
break;
case 'r': // Bit is readonly. Write as 0.
WriteAndMask &= andMask;
break;
case 'w': // Bit is write-only. Read as 0.
ReadAndMask &= andMask;
break;
case 'x': // Bit is read-write
case 'X':
case 'n':
case 'c': // Bit is clearable-only
case 's': // Bit is setable-only
break;
}
bitno--;
}
ImplementedMask = (uint)fullimpl;
ResetValue &= ImplementedMask;
}
public static PICRegisterAccessMasks Create(PICRegisterTraits traits)
{
return(new PICRegisterAccessMasks(traits ?? throw new ArgumentNullException(nameof(traits))));
}
