internal static uint *acpiCheckRSDPtr(uint *ptr)
{
string sig = "RSD PTR ";
RSDPtr *rsdp = (RSDPtr *)ptr;
byte * bptr;
byte check = 0;
int i;
if (Compare(sig, (byte *)rsdp) == 0)
{
bptr = (byte *)ptr;
for (i = 0; i < 20; i++)
{
check += *bptr;
bptr++;
}
if (check == 0)
{
Compare("RSDT", (byte *)rsdp->RsdtAddress);
if (rsdp->RsdtAddress != 0)
{
return((uint *)rsdp->RsdtAddress);
}
}
}
return(null);
}
// check if the given address has a valid header
static uint *acpiCheckRSDPtr(uint *ptr)
{
string sig = "RSD PTR ";
RSDPtr *rsdp = (RSDPtr *)ptr;
byte * bptr;
byte check = 0;
int i;
if (Compare(sig, (byte *)rsdp) == 0)
{
// check checksum rsdpd
bptr = (byte *)ptr;
for (i = 0; i < 20; i++)
{
check += *bptr;
bptr++;
}
//Console.WriteLine("0x" + check.ToHex());
// found valid rsdpd
if (check == 0)
{
//string str = rsdp->RsdtAddress.ToHex();
//Console.WriteLine("seen"); Console.WriteLine(str);
Compare("RSDT", (byte *)rsdp->RsdtAddress);
if (rsdp->RsdtAddress != 0)
{
return((uint *)rsdp->RsdtAddress);
}
}
}
Console.WriteLine("Unable to find RSDT. ACPI not available");
return(null);
}
