static ACPI_STATUS
OslMapTable (
ACPI_SIZE Address,
char *Signature,
ACPI_TABLE_HEADER **Table)
{
ACPI_TABLE_HEADER *MappedTable;
UINT32 Length;
/* Map the header so we can get the table length */
MappedTable = AcpiOsMapMemory (Address, sizeof (*MappedTable));
if (!MappedTable)
{
return (AE_BAD_ADDRESS);
}
/* Check if table is valid */
if (!ApIsValidHeader (MappedTable))
{
AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable));
return (AE_BAD_HEADER);
}
/* If specified, signature must match */
if (Signature &&
!ACPI_COMPARE_NAME (Signature, MappedTable->Signature))
{
AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable));
return (AE_NOT_EXIST);
}
/* Map the entire table */
Length = MappedTable->Length;
AcpiOsUnmapMemory (MappedTable, sizeof (*MappedTable));
MappedTable = AcpiOsMapMemory (Address, Length);
if (!MappedTable)
{
return (AE_BAD_ADDRESS);
}
(void) ApIsValidChecksum (MappedTable);
*Table = MappedTable;
return (AE_OK);
}
UINT32
ApGetTableLength (
ACPI_TABLE_HEADER *Table)
{
ACPI_TABLE_RSDP *Rsdp;
/* Check if table is valid */
if (!ApIsValidHeader (Table))
{
return (0);
}
if (ACPI_VALIDATE_RSDP_SIG (Table->Signature))
{
Rsdp = ACPI_CAST_PTR (ACPI_TABLE_RSDP, Table);
return (AcpiTbGetRsdpLength (Rsdp));
}
/* Normal ACPI table */
return (Table->Length);
}
