_COMPONENT acpi_tb_get_all_tables acpi_tb_get_table acpi_tb_get_table_facs acpi_tb_get_table_ptr acpi_tb_get_table_rsdt acpi_tb_verify_rsdp RSDP_CHECKSUM_LENGTH

ACPI_STATUS acpi_tb_get_table_rsdt ( u32 *  number_of_tables ) Definition at line 450 of file tbget.c. { ACPI_TABLE_DESC table_info; ACPI_STATUS status = AE_OK; ACPI_PHYSICAL_ADDRESS physical_address; u32 signature_length; char *table_signature; /* * Get the RSDT from the RSDP */ /* * For RSDP revision 0 or 1, we use the RSDT. * For RSDP revision 2 (and above), we use the XSDT */ if (acpi_gbl_RSDP->revision < 2) { #ifdef _IA64 /* 0.71 RSDP has 64bit Rsdt address field */ physical_address = ((RSDP_DESCRIPTOR_REV071 *)acpi_gbl_RSDP)->rsdt_physical_address; #else physical_address = (ACPI_PHYSICAL_ADDRESS) acpi_gbl_RSDP->rsdt_physical_address; #endif table_signature = RSDT_SIG; signature_length = sizeof (RSDT_SIG) -1; } else { physical_address = (ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (acpi_gbl_RSDP->xsdt_physical_address); table_signature = XSDT_SIG; signature_length = sizeof (XSDT_SIG) -1; } /* Get the RSDT/XSDT */ status = acpi_tb_get_table (physical_address, NULL, &table_info); if (ACPI_FAILURE (status)) { return (status); } /* Check the RSDT or XSDT signature */ if (STRNCMP ((char *) table_info.pointer, table_signature, signature_length)) { /* Invalid RSDT or XSDT signature */ REPORT_ERROR (("Invalid signature where RSDP indicates %s should be located\n", table_signature)); return (AE_NO_ACPI_TABLES); } /* Valid RSDT signature, verify the checksum */ status = acpi_tb_verify_table_checksum (table_info.pointer); /* Convert and/or copy to an XSDT structure */ status = acpi_tb_convert_to_xsdt (&table_info, number_of_tables); if (ACPI_FAILURE (status)) { return (status); } /* Save the table pointers and allocation info */ status = acpi_tb_init_table_descriptor (ACPI_TABLE_XSDT, &table_info); if (ACPI_FAILURE (status)) { return (status); } acpi_gbl_XSDT = (XSDT_DESCRIPTOR *) table_info.pointer; return (status); }