tbget.c

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	status = acpi_tb_install_table (table_ptr, &table_info);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	/*
	 * Create the common FACS pointer table
	 * (Contains pointers to the original table)
	 */

	status = acpi_tb_build_common_facs (&table_info);
	if (ACPI_FAILURE (status)) {
		return (status);
	}


	/*
	 * Get the DSDT (We know that the FADT is valid now)
	 */

	status = acpi_tb_get_table ((ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (acpi_gbl_FADT->Xdsdt),
			  table_ptr, &table_info);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	/* Install the DSDT */

	status = acpi_tb_install_table (table_ptr, &table_info);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	/* Dump the DSDT Header */

	/* Dump the entire DSDT */

	/*
	 * Initialize the capabilities flags.
	 * Assumes that platform supports ACPI_MODE since we have tables!
	 */
	acpi_gbl_system_flags |= acpi_hw_get_mode_capabilities ();


	/* Always delete the RSDP mapping, we are done with it */

	acpi_tb_delete_acpi_table (ACPI_TABLE_RSDP);

	return (status);
}


/*******************************************************************************
 *
 * FUNCTION:    Acpi_tb_verify_rsdp
 *
 * PARAMETERS:  Number_of_tables    - Where the table count is placed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
 *
 ******************************************************************************/

ACPI_STATUS
acpi_tb_verify_rsdp (
	ACPI_PHYSICAL_ADDRESS   rsdp_physical_address)
{
	ACPI_TABLE_DESC         table_info;
	ACPI_STATUS             status;
	u8                      *table_ptr;


	/*
	 * Obtain access to the RSDP structure
	 */
	status = acpi_os_map_memory (rsdp_physical_address,
			  sizeof (RSDP_DESCRIPTOR),
			  (void **) &table_ptr);
	if (ACPI_FAILURE (status)) {
		return (status);
	}

	/*
	 *  The signature and checksum must both be correct
	 */
	if (STRNCMP ((NATIVE_CHAR *) table_ptr, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
		/* Nope, BAD Signature */

		status = AE_BAD_SIGNATURE;
		goto cleanup;
	}

	if (acpi_tb_checksum (table_ptr, RSDP_CHECKSUM_LENGTH) != 0) {
		/* Nope, BAD Checksum */

		status = AE_BAD_CHECKSUM;
		goto cleanup;
	}

	/* TBD: Check extended checksum if table version >= 2 */

	/* The RSDP supplied is OK */

	table_info.pointer     = (ACPI_TABLE_HEADER *) table_ptr;
	table_info.length      = sizeof (RSDP_DESCRIPTOR);
	table_info.allocation  = ACPI_MEM_MAPPED;
	table_info.base_pointer = table_ptr;

	/* 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 = (RSDP_DESCRIPTOR *) table_info.pointer;
	return (status);


	/* Error exit */
cleanup:

	acpi_os_unmap_memory (table_ptr, sizeof (RSDP_DESCRIPTOR));
	return (status);
}


/*******************************************************************************
 *
 * FUNCTION:    Acpi_tb_get_table_rsdt
 *
 * PARAMETERS:  Number_of_tables    - Where the table count is placed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
 *
 ******************************************************************************/

ACPI_STATUS
acpi_tb_get_table_rsdt (
	u32                     *number_of_tables)
{
	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);
}


/******************************************************************************
 *
 * FUNCTION:    Acpi_tb_get_table_facs
 *
 * PARAMETERS:  *Buffer_ptr             - If Buffer_ptr is valid, read data from
 *                                          buffer rather than searching memory
 *              *Table_info             - Where the table info is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Returns a pointer to the FACS as defined in FADT.  This
 *              function assumes the global variable FADT has been
 *              correctly initialized.  The value of FADT->Firmware_ctrl
 *              into a far pointer which is returned.
 *
 *****************************************************************************/

ACPI_STATUS
acpi_tb_get_table_facs (
	ACPI_TABLE_HEADER       *buffer_ptr,
	ACPI_TABLE_DESC         *table_info)
{
	void                    *table_ptr = NULL;
	u32                     size;
	u8                      allocation;
	ACPI_STATUS             status = AE_OK;


	/* Must have a valid FADT pointer */

	if (!acpi_gbl_FADT) {
		return (AE_NO_ACPI_TABLES);
	}

	size = sizeof (FACS_DESCRIPTOR);
	if (buffer_ptr) {
		/*
		 * Getting table from a file -- allocate a buffer and
		 * read the table.
		 */
		table_ptr = acpi_cm_allocate (size);
		if(!table_ptr) {
			return (AE_NO_MEMORY);
		}

		MEMCPY (table_ptr, buffer_ptr, size);

		/* Save allocation type */

		allocation = ACPI_MEM_ALLOCATED;
	}

	else {
		/* Just map the physical memory to our address space */

		status = acpi_tb_map_acpi_table ((ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (acpi_gbl_FADT->Xfirmware_ctrl),
				   &size, &table_ptr);
		if (ACPI_FAILURE(status)) {
			return (status);
		}

		/* Save allocation type */

		allocation = ACPI_MEM_MAPPED;
	}


	/* Return values */

	table_info->pointer     = table_ptr;
	table_info->length      = size;
	table_info->allocation  = allocation;
	table_info->base_pointer = table_ptr;

	return (status);
}