[linux-2.6-block.git] / drivers / acpi / tables / tbrsdt.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);
	}

	/* Verify RSDP signature and checksum */

	status = acpi_tb_validate_rsdp (rsdp);
	if (ACPI_FAILURE (status)) {
		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:  out_address         - Where the address is returned
 *
 * RETURN:      None, Address
 *
 * DESCRIPTION: Extract the address of either the RSDT or XSDT, depending on the
 *              version of the RSDP and whether the XSDT pointer is valid
 *
 ******************************************************************************/

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;

	/* Use XSDT if it is present */

	if ((acpi_gbl_RSDP->revision >= 2) &&
		acpi_gbl_RSDP->xsdt_physical_address) {
		out_address->pointer.value =
			acpi_gbl_RSDP->xsdt_physical_address;
		acpi_gbl_root_table_type = ACPI_TABLE_TYPE_XSDT;
	}
	else {
		/* No XSDT, use the RSDT */

		out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address;
		acpi_gbl_root_table_type = ACPI_TABLE_TYPE_RSDT;
	}
}


/*******************************************************************************
 *
 * 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");


	/*
	 * Search for appropriate signature, RSDT or XSDT
	 */
	if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
		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_root_table_type == ACPI_TABLE_TYPE_RSDT) {
			ACPI_REPORT_ERROR (("Looking for RSDT\n"))
		}
		else {
			ACPI_REPORT_ERROR (("Looking for XSDT\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);
}
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
	2	*
	3	* Module Name: tbrsdt - ACPI RSDT table utilities
	4	*
	5	*****************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
	44
	45	#include <acpi/acpi.h>
	46	#include <acpi/actables.h>
	47
	48
	49	#define _COMPONENT ACPI_TABLES
	50	ACPI_MODULE_NAME ("tbrsdt")
	51
	52
	53	/*******************************************************************************
	54	*
	55	* FUNCTION: acpi_tb_verify_rsdp
	56	*
	57	* PARAMETERS: Address - RSDP (Pointer to RSDT)
	58	*
	59	* RETURN: Status
	60	*
	61	* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
	62	*
	63	******************************************************************************/
	64
65	acpi_status
66	acpi_tb_verify_rsdp (
67	struct acpi_pointer *address)
68	{
69	struct acpi_table_desc table_info;
70	acpi_status status;
71	struct rsdp_descriptor *rsdp;
72
73
74	ACPI_FUNCTION_TRACE ("tb_verify_rsdp");
75
76
77	switch (address->pointer_type) {
78	case ACPI_LOGICAL_POINTER:
79
80	rsdp = address->pointer.logical;
81	break;
82
83	case ACPI_PHYSICAL_POINTER:
84	/*
85	* Obtain access to the RSDP structure
86	*/
44f6c012 RM	87	status = acpi_os_map_memory (address->pointer.physical,
	88	sizeof (struct rsdp_descriptor),
	89	(void *) &rsdp);
1da177e4 LT	90	if (ACPI_FAILURE (status)) {
	91	return_ACPI_STATUS (status);
	92	}
	93	break;
	94
	95	default:
	96	return_ACPI_STATUS (AE_BAD_PARAMETER);
	97	}
	98
f9f4601f	99	/* Verify RSDP signature and checksum */
1da177e4	100
f9f4601f RM	101	status = acpi_tb_validate_rsdp (rsdp);
f9f4601f RM	102	if (ACPI_FAILURE (status)) {
1da177e4 LT	103	goto cleanup;
	104	}
	105
1da177e4 LT	106	/* The RSDP supplied is OK */
	107
	108	table_info.pointer = ACPI_CAST_PTR (struct acpi_table_header, rsdp);
	109	table_info.length = sizeof (struct rsdp_descriptor);
	110	table_info.allocation = ACPI_MEM_MAPPED;
	111
	112	/* Save the table pointers and allocation info */
	113
	114	status = acpi_tb_init_table_descriptor (ACPI_TABLE_RSDP, &table_info);
	115	if (ACPI_FAILURE (status)) {
	116	goto cleanup;
	117	}
	118
	119	/* Save the RSDP in a global for easy access */
	120
	121	acpi_gbl_RSDP = ACPI_CAST_PTR (struct rsdp_descriptor, table_info.pointer);
	122	return_ACPI_STATUS (status);
	123
	124
	125	/* Error exit */
	126	cleanup:
	127
	128	if (acpi_gbl_table_flags & ACPI_PHYSICAL_POINTER) {
	129	acpi_os_unmap_memory (rsdp, sizeof (struct rsdp_descriptor));
	130	}
	131	return_ACPI_STATUS (status);
	132	}
	133
	134
	135	/*******************************************************************************
	136	*
	137	* FUNCTION: acpi_tb_get_rsdt_address
	138	*
44f6c012	139	* PARAMETERS: out_address - Where the address is returned
1da177e4	140	*
44f6c012	141	* RETURN: None, Address
1da177e4	142	*
73459f73 RM	143	* DESCRIPTION: Extract the address of either the RSDT or XSDT, depending on the
73459f73 RM	144	* version of the RSDP and whether the XSDT pointer is valid
1da177e4 LT	145	*
	146	******************************************************************************/
	147
	148	void
	149	acpi_tb_get_rsdt_address (
	150	struct acpi_pointer *out_address)
	151	{
	152
	153	ACPI_FUNCTION_ENTRY ();
	154
	155
	156	out_address->pointer_type = acpi_gbl_table_flags \| ACPI_LOGICAL_ADDRESSING;
	157
73459f73 RM	158	/* Use XSDT if it is present */
	159
	160	if ((acpi_gbl_RSDP->revision >= 2) &&
	161	acpi_gbl_RSDP->xsdt_physical_address) {
44f6c012 RM	162	out_address->pointer.value =
44f6c012 RM	163	acpi_gbl_RSDP->xsdt_physical_address;
73459f73 RM	164	acpi_gbl_root_table_type = ACPI_TABLE_TYPE_XSDT;
	165	}
	166	else {
	167	/* No XSDT, use the RSDT */
	168
	169	out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address;
	170	acpi_gbl_root_table_type = ACPI_TABLE_TYPE_RSDT;
1da177e4 LT	171	}
	172	}
	173
	174
	175	/*******************************************************************************
	176	*
	177	* FUNCTION: acpi_tb_validate_rsdt
	178	*
	179	* PARAMETERS: table_ptr - Addressable pointer to the RSDT.
	180	*
	181	* RETURN: Status
	182	*
	183	* DESCRIPTION: Validate signature for the RSDT or XSDT
	184	*
	185	******************************************************************************/
	186
	187	acpi_status
	188	acpi_tb_validate_rsdt (
	189	struct acpi_table_header *table_ptr)
	190	{
	191	int no_match;
	192
	193
	194	ACPI_FUNCTION_NAME ("tb_validate_rsdt");
	195
	196
	197	/*
73459f73	198	* Search for appropriate signature, RSDT or XSDT
1da177e4	199	*/
73459f73	200	if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
1da177e4 LT	201	no_match = ACPI_STRNCMP ((char *) table_ptr, RSDT_SIG,
	202	sizeof (RSDT_SIG) -1);
	203	}
	204	else {
	205	no_match = ACPI_STRNCMP ((char *) table_ptr, XSDT_SIG,
	206	sizeof (XSDT_SIG) -1);
	207	}
	208
	209	if (no_match) {
	210	/* Invalid RSDT or XSDT signature */
	211
44f6c012 RM	212	ACPI_REPORT_ERROR ((
44f6c012 RM	213	"Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
1da177e4 LT	214
	215	ACPI_DUMP_BUFFER (acpi_gbl_RSDP, 20);
	216
	217	ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
	218	"RSDT/XSDT signature at %X (%p) is invalid\n",
	219	acpi_gbl_RSDP->rsdt_physical_address,
	220	(void *) (acpi_native_uint) acpi_gbl_RSDP->rsdt_physical_address));
	221
73459f73 RM	222	if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
73459f73 RM	223	ACPI_REPORT_ERROR (("Looking for RSDT\n"))
1da177e4 LT	224	}
1da177e4 LT	225	else {
73459f73	226	ACPI_REPORT_ERROR (("Looking for XSDT\n"))
1da177e4 LT	227	}
	228
	229	ACPI_DUMP_BUFFER ((char *) table_ptr, 48);
	230
	231	return (AE_BAD_SIGNATURE);
	232	}
	233
	234	return (AE_OK);
	235	}
	236
	237
	238	/*******************************************************************************
	239	*
	240	* FUNCTION: acpi_tb_get_table_rsdt
	241	*
	242	* PARAMETERS: None
	243	*
	244	* RETURN: Status
	245	*
	246	* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
	247	*
	248	******************************************************************************/
	249
	250	acpi_status
	251	acpi_tb_get_table_rsdt (
	252	void)
	253	{
	254	struct acpi_table_desc table_info;
	255	acpi_status status;
	256	struct acpi_pointer address;
	257
	258
	259	ACPI_FUNCTION_TRACE ("tb_get_table_rsdt");
	260
	261
	262	/* Get the RSDT/XSDT via the RSDP */
	263
	264	acpi_tb_get_rsdt_address (&address);
	265
	266	table_info.type = ACPI_TABLE_XSDT;
	267	status = acpi_tb_get_table (&address, &table_info);
	268	if (ACPI_FAILURE (status)) {
	269	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT/XSDT, %s\n",
	270	acpi_format_exception (status)));
44f6c012	271
1da177e4 LT	272	return_ACPI_STATUS (status);
	273	}
	274
	275	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
	276	"RSDP located at %p, points to RSDT physical=%8.8X%8.8X \n",
	277	acpi_gbl_RSDP,
	278	ACPI_FORMAT_UINT64 (address.pointer.value)));
	279
	280	/* Check the RSDT or XSDT signature */
	281
	282	status = acpi_tb_validate_rsdt (table_info.pointer);
	283	if (ACPI_FAILURE (status)) {
	284	return_ACPI_STATUS (status);
	285	}
	286
	287	/* Get the number of tables defined in the RSDT or XSDT */
	288
44f6c012 RM	289	acpi_gbl_rsdt_table_count = acpi_tb_get_table_count (acpi_gbl_RSDP,
44f6c012 RM	290	table_info.pointer);
1da177e4 LT	291
	292	/* Convert and/or copy to an XSDT structure */
	293
	294	status = acpi_tb_convert_to_xsdt (&table_info);
	295	if (ACPI_FAILURE (status)) {
	296	return_ACPI_STATUS (status);
	297	}
	298
	299	/* Save the table pointers and allocation info */
	300
	301	status = acpi_tb_init_table_descriptor (ACPI_TABLE_XSDT, &table_info);
	302	if (ACPI_FAILURE (status)) {
	303	return_ACPI_STATUS (status);
	304	}
	305
	306	acpi_gbl_XSDT = ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info.pointer);
	307
	308	ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", acpi_gbl_XSDT));
	309	return_ACPI_STATUS (status);
	310	}
	311
	312