public static void WriteField(ACPIObject val, ACPIObject.FieldUnitData fd, IMachineInterface mi)
{
ACPIObject.OpRegionData oprd = fd.OpRegion.Data as ACPIObject.OpRegionData;
ulong addr = oprd.Offset;
if ((fd.BitOffset % 8) != 0)
{
throw new NotImplementedException();
}
addr += (ulong)(fd.BitOffset / 8);
ulong mask = 0xffffffffffffffff;
int alength = 0;
switch (fd.Access)
{
case ACPIObject.FieldUnitData.AccessType.ByteAcc:
alength = 8;
break;
case ACPIObject.FieldUnitData.AccessType.WordAcc:
alength = 16;
break;
case ACPIObject.FieldUnitData.AccessType.DWordAcc:
alength = 32;
break;
case ACPIObject.FieldUnitData.AccessType.QWordAcc:
alength = 64;
break;
case ACPIObject.FieldUnitData.AccessType.AnyAcc:
alength = fd.BitLength;
break;
}
if (alength <= 8)
{
alength = 8;
}
else if (alength <= 16)
{
alength = 16;
}
else if (alength <= 32)
{
alength = 32;
}
else if (alength <= 64)
{
alength = 64;
}
else
{
throw new Exception("Unsupported access length: " + alength.ToString());
}
switch (oprd.RegionSpace)
{
case 0:
// SystemMemory
switch (alength)
{
case 8:
mi.WriteMemoryByte(addr, (byte)val);
break;
case 16:
mi.WriteMemoryWord(addr, (ushort)val);
break;
case 32:
mi.WriteMemoryDWord(addr, (uint)val);
break;
case 64:
mi.WriteMemoryQWord(addr, val);
break;
}
break;
case 1:
// SystemIO
switch (alength)
{
case 8:
mi.WriteIOByte(addr, (byte)val);
break;
case 16:
mi.WriteIOWord(addr, (ushort)val);
break;
case 32:
mi.WriteIODWord(addr, (uint)val);
break;
case 64:
mi.WriteIOQWord(addr, val);
break;
}
break;
default:
throw new NotImplementedException();
}
}
public static ACPIObject ReadField(ACPIObject.FieldUnitData fd, IMachineInterface mi)
{
ACPIObject.OpRegionData oprd = fd.OpRegion.Data as ACPIObject.OpRegionData;
ulong addr = oprd.Offset;
if ((fd.BitOffset % 8) != 0)
{
throw new NotImplementedException();
}
addr += (ulong)(fd.BitOffset / 8);
ulong res = 0;
ulong mask = 0xffffffffffffffff;
int alength = 0;
switch (fd.Access)
{
case ACPIObject.FieldUnitData.AccessType.ByteAcc:
alength = 8;
break;
case ACPIObject.FieldUnitData.AccessType.WordAcc:
alength = 16;
break;
case ACPIObject.FieldUnitData.AccessType.DWordAcc:
alength = 32;
break;
case ACPIObject.FieldUnitData.AccessType.QWordAcc:
alength = 64;
break;
case ACPIObject.FieldUnitData.AccessType.AnyAcc:
alength = fd.BitLength;
break;
}
if (alength <= 8)
{
alength = 8;
}
else if (alength <= 16)
{
alength = 16;
}
else if (alength <= 32)
{
alength = 32;
}
else if (alength <= 64)
{
alength = 64;
}
else
{
throw new Exception("Unsupported access length: " + alength.ToString());
}
switch (oprd.RegionSpace)
{
case 0:
// SystemMemory
switch (alength)
{
case 8:
res = (ulong)mi.ReadMemoryByte(addr);
break;
case 16:
res = (ulong)mi.ReadMemoryWord(addr);
break;
case 32:
res = (ulong)mi.ReadMemoryDWord(addr);
break;
case 64:
res = (ulong)mi.ReadMemoryQWord(addr);
break;
}
break;
case 1:
// SystemIO
switch (alength)
{
case 8:
res = (ulong)mi.ReadIOByte(addr);
break;
case 16:
res = (ulong)mi.ReadIOWord(addr);
break;
case 32:
res = (ulong)mi.ReadIODWord(addr);
break;
case 64:
res = (ulong)mi.ReadIOQWord(addr);
break;
}
break;
case 2:
// PCI Conf space
{
/* ACPI divides the index into 4x 16-bit words:
* - highest is reserved (0)
* - next is PCI device number
* - next is PCI function number
* - lowest is offset in configuration space
*
* ACPI enforces that only bus 0 is used
*/
ulong bus = 0;
ulong idx = (ulong)fd.BitOffset / 8UL;
ulong device = (idx >> 32) & 0x1f; // 5 bits for a PCI Device
ulong func = (idx >> 16) & 0x7; // 3 bits for function number
ulong offset = idx & 0xff; // 8 bits for register number
ulong act_offset = offset & 0xfc; // enforce 32-bit access
ulong pci_addr = act_offset | (func << 8) | (device << 11);
mi.WriteIODWord(0xcf8, (uint)pci_addr);
uint v = mi.ReadIODWord(0xcfc);
res = (ulong)(v >> (int)(offset - act_offset));
}
break;
default:
throw new NotImplementedException();
}
mask >>= (64 - fd.BitLength);
res &= mask;
return(new ACPIObject(ACPIObject.DataType.Integer, res));
}
