UINT32
GetSystemMemorySizeBelow4gb (
VOID
)
{
UINT8 Cmos0x34;
UINT8 Cmos0x35;
//
// CMOS 0x34/0x35 specifies the system memory above 16 MB.
// * CMOS(0x35) is the high byte
// * CMOS(0x34) is the low byte
// * The size is specified in 64kb chunks
// * Since this is memory above 16MB, the 16MB must be added
// into the calculation to get the total memory size.
//
Cmos0x34 = (UINT8) CmosRead8 (0x34);
Cmos0x35 = (UINT8) CmosRead8 (0x35);
return (((UINTN)((Cmos0x35 << 8) + Cmos0x34) << 16) + SIZE_16MB);
}
VOID
BootModeInitialization (
VOID
)
{
EFI_STATUS Status;
if (CmosRead8 (0xF) == 0xFE) {
mBootMode = BOOT_ON_S3_RESUME;
}
Status = PeiServicesSetBootMode (mBootMode);
ASSERT_EFI_ERROR (Status);
Status = PeiServicesInstallPpi (mPpiBootMode);
ASSERT_EFI_ERROR (Status);
}
VOID
DebugDumpCmos (
VOID
)
{
UINTN Loop;
DEBUG ((EFI_D_INFO, "CMOS:\n"));
for (Loop = 0; Loop < 0x80; Loop++) {
if ((Loop % 0x10) == 0) {
DEBUG ((EFI_D_INFO, "%02x:", Loop));
}
DEBUG ((EFI_D_INFO, " %02x", CmosRead8 (Loop)));
if ((Loop % 0x10) == 0xf) {
DEBUG ((EFI_D_INFO, "\n"));
}
}
}
STATIC
UINT64
GetSystemMemorySizeAbove4gb (
)
{
UINT32 Size;
UINTN CmosIndex;
//
// CMOS 0x5b-0x5d specifies the system memory above 4GB MB.
// * CMOS(0x5d) is the most significant size byte
// * CMOS(0x5c) is the middle size byte
// * CMOS(0x5b) is the least significant size byte
// * The size is specified in 64kb chunks
//
Size = 0;
for (CmosIndex = 0x5d; CmosIndex >= 0x5b; CmosIndex--) {
Size = (UINT32) (Size << 8) + (UINT32) CmosRead8 (CmosIndex);
}
return LShiftU64 (Size, 16);
}