1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
324 lines
8.7 KiB
C
324 lines
8.7 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: tbrsdt - ACPI RSDT table utilities
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2005, R. Byron Moore
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
|
|
#include <acpi/acpi.h>
|
|
#include <acpi/actables.h>
|
|
|
|
|
|
#define _COMPONENT ACPI_TABLES
|
|
ACPI_MODULE_NAME ("tbrsdt")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_verify_rsdp
|
|
*
|
|
* PARAMETERS: Address - RSDP (Pointer to RSDT)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_tb_verify_rsdp (
|
|
struct acpi_pointer *address)
|
|
{
|
|
struct acpi_table_desc table_info;
|
|
acpi_status status;
|
|
struct rsdp_descriptor *rsdp;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("tb_verify_rsdp");
|
|
|
|
|
|
switch (address->pointer_type) {
|
|
case ACPI_LOGICAL_POINTER:
|
|
|
|
rsdp = address->pointer.logical;
|
|
break;
|
|
|
|
case ACPI_PHYSICAL_POINTER:
|
|
/*
|
|
* Obtain access to the RSDP structure
|
|
*/
|
|
status = acpi_os_map_memory (address->pointer.physical, sizeof (struct rsdp_descriptor),
|
|
(void *) &rsdp);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* The signature and checksum must both be correct
|
|
*/
|
|
if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
|
|
/* Nope, BAD Signature */
|
|
|
|
status = AE_BAD_SIGNATURE;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Check the standard checksum */
|
|
|
|
if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
|
|
status = AE_BAD_CHECKSUM;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Check extended checksum if table version >= 2 */
|
|
|
|
if (rsdp->revision >= 2) {
|
|
if (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) {
|
|
status = AE_BAD_CHECKSUM;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
|
|
/* The RSDP supplied is OK */
|
|
|
|
table_info.pointer = ACPI_CAST_PTR (struct acpi_table_header, rsdp);
|
|
table_info.length = sizeof (struct rsdp_descriptor);
|
|
table_info.allocation = ACPI_MEM_MAPPED;
|
|
|
|
/* Save the table pointers and allocation info */
|
|
|
|
status = acpi_tb_init_table_descriptor (ACPI_TABLE_RSDP, &table_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Save the RSDP in a global for easy access */
|
|
|
|
acpi_gbl_RSDP = ACPI_CAST_PTR (struct rsdp_descriptor, table_info.pointer);
|
|
return_ACPI_STATUS (status);
|
|
|
|
|
|
/* Error exit */
|
|
cleanup:
|
|
|
|
if (acpi_gbl_table_flags & ACPI_PHYSICAL_POINTER) {
|
|
acpi_os_unmap_memory (rsdp, sizeof (struct rsdp_descriptor));
|
|
}
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_get_rsdt_address
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: RSDT physical address
|
|
*
|
|
* DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
|
|
* version of the RSDP
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_tb_get_rsdt_address (
|
|
struct acpi_pointer *out_address)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
out_address->pointer_type = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING;
|
|
|
|
/*
|
|
* 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) {
|
|
out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address;
|
|
}
|
|
else {
|
|
out_address->pointer.value = acpi_gbl_RSDP->xsdt_physical_address;
|
|
}
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_validate_rsdt
|
|
*
|
|
* PARAMETERS: table_ptr - Addressable pointer to the RSDT.
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Validate signature for the RSDT or XSDT
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_tb_validate_rsdt (
|
|
struct acpi_table_header *table_ptr)
|
|
{
|
|
int no_match;
|
|
|
|
|
|
ACPI_FUNCTION_NAME ("tb_validate_rsdt");
|
|
|
|
|
|
/*
|
|
* 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) {
|
|
no_match = ACPI_STRNCMP ((char *) table_ptr, RSDT_SIG,
|
|
sizeof (RSDT_SIG) -1);
|
|
}
|
|
else {
|
|
no_match = ACPI_STRNCMP ((char *) table_ptr, XSDT_SIG,
|
|
sizeof (XSDT_SIG) -1);
|
|
}
|
|
|
|
if (no_match) {
|
|
/* Invalid RSDT or XSDT signature */
|
|
|
|
ACPI_REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
|
|
|
|
ACPI_DUMP_BUFFER (acpi_gbl_RSDP, 20);
|
|
|
|
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
|
|
"RSDT/XSDT signature at %X (%p) is invalid\n",
|
|
acpi_gbl_RSDP->rsdt_physical_address,
|
|
(void *) (acpi_native_uint) acpi_gbl_RSDP->rsdt_physical_address));
|
|
|
|
if (acpi_gbl_RSDP->revision < 2) {
|
|
ACPI_REPORT_ERROR (("Looking for RSDT (RSDP->Rev < 2)\n"))
|
|
}
|
|
else {
|
|
ACPI_REPORT_ERROR (("Looking for XSDT (RSDP->Rev >= 2)\n"))
|
|
}
|
|
|
|
ACPI_DUMP_BUFFER ((char *) table_ptr, 48);
|
|
|
|
return (AE_BAD_SIGNATURE);
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_get_table_rsdt
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_tb_get_table_rsdt (
|
|
void)
|
|
{
|
|
struct acpi_table_desc table_info;
|
|
acpi_status status;
|
|
struct acpi_pointer address;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("tb_get_table_rsdt");
|
|
|
|
|
|
/* Get the RSDT/XSDT via the RSDP */
|
|
|
|
acpi_tb_get_rsdt_address (&address);
|
|
|
|
table_info.type = ACPI_TABLE_XSDT;
|
|
status = acpi_tb_get_table (&address, &table_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n",
|
|
acpi_format_exception (status)));
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n",
|
|
acpi_gbl_RSDP,
|
|
ACPI_FORMAT_UINT64 (address.pointer.value)));
|
|
|
|
/* Check the RSDT or XSDT signature */
|
|
|
|
status = acpi_tb_validate_rsdt (table_info.pointer);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Get the number of tables defined in the RSDT or XSDT */
|
|
|
|
acpi_gbl_rsdt_table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, table_info.pointer);
|
|
|
|
/* Convert and/or copy to an XSDT structure */
|
|
|
|
status = acpi_tb_convert_to_xsdt (&table_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* Save the table pointers and allocation info */
|
|
|
|
status = acpi_tb_init_table_descriptor (ACPI_TABLE_XSDT, &table_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
acpi_gbl_XSDT = ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info.pointer);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", acpi_gbl_XSDT));
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|