tbconvrt.c

h内核

	 * Convert the V1.0 block addresses to V2.0 GAS structures
	 */
	acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len,
			  (acpi_physical_address)   local_fadt->V1_pm1a_evt_blk);
	acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len,
			  (acpi_physical_address)   local_fadt->V1_pm1b_evt_blk);
	acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len,
			  (acpi_physical_address)   local_fadt->V1_pm1a_cnt_blk);
	acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len,
			  (acpi_physical_address)   local_fadt->V1_pm1b_cnt_blk);
	acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len,
			  (acpi_physical_address)   local_fadt->V1_pm2_cnt_blk);
	acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len,
			  (acpi_physical_address)   local_fadt->V1_pm_tmr_blk);
	acpi_tb_init_generic_address (&local_fadt->xgpe0_blk, 0,
			  (acpi_physical_address)   local_fadt->V1_gpe0_blk);
	acpi_tb_init_generic_address (&local_fadt->xgpe1_blk, 0,
			  (acpi_physical_address)   local_fadt->V1_gpe1_blk);

	/* Create separate GAS structs for the PM1 Enable registers */

	acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
		 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
		 (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
			ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));

	/* PM1B is optional; leave null if not present */

	if (local_fadt->xpm1b_evt_blk.address) {
		acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
			 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
			 (acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
				ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
	}
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_convert_fadt2
 *
 * PARAMETERS:  local_fadt      - Pointer to new FADT
 *              original_fadt   - Pointer to old FADT
 *
 * RETURN:      Populates local_fadt
 *
 * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
 *              Handles optional "X" fields.
 *
 ******************************************************************************/

static void
acpi_tb_convert_fadt2 (
	struct fadt_descriptor_rev2    *local_fadt,
	struct fadt_descriptor_rev2    *original_fadt)
{

	/* We have an ACPI 2.0 FADT but we must copy it to our local buffer */

	ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev2));

	/*
	 * "X" fields are optional extensions to the original V1.0 fields, so
	 * we must selectively expand V1.0 fields if the corresponding X field
	 * is zero.
	 */
	if (!(local_fadt->xfirmware_ctrl)) {
		ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
	}

	if (!(local_fadt->Xdsdt)) {
		ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
	}

	if (!(local_fadt->xpm1a_evt_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk,
			local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1a_evt_blk);
	}

	if (!(local_fadt->xpm1b_evt_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk,
			local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1b_evt_blk);
	}

	if (!(local_fadt->xpm1a_cnt_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk,
			local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk);
	}

	if (!(local_fadt->xpm1b_cnt_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk,
			local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk);
	}

	if (!(local_fadt->xpm2_cnt_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk,
			local_fadt->pm2_cnt_len, (acpi_physical_address) local_fadt->V1_pm2_cnt_blk);
	}

	if (!(local_fadt->xpm_tmr_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk,
			local_fadt->pm_tm_len, (acpi_physical_address) local_fadt->V1_pm_tmr_blk);
	}

	if (!(local_fadt->xgpe0_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xgpe0_blk,
			0, (acpi_physical_address) local_fadt->V1_gpe0_blk);
	}

	if (!(local_fadt->xgpe1_blk.address)) {
		acpi_tb_init_generic_address (&local_fadt->xgpe1_blk,
			0, (acpi_physical_address) local_fadt->V1_gpe1_blk);
	}

	/* Create separate GAS structs for the PM1 Enable registers */

	acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
		(u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
		(acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
			ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
	acpi_gbl_xpm1a_enable.address_space_id = local_fadt->xpm1a_evt_blk.address_space_id;

	/* PM1B is optional; leave null if not present */

	if (local_fadt->xpm1b_evt_blk.address) {
		acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
			(u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
			(acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
				ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
		acpi_gbl_xpm1b_enable.address_space_id = local_fadt->xpm1b_evt_blk.address_space_id;
	}
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_convert_table_fadt
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
 *              ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
 *              copied to the local FADT.  The ACPI CA software uses this
 *              local FADT. Thus a significant amount of special #ifdef
 *              type codeing is saved.
 *
 ******************************************************************************/

acpi_status
acpi_tb_convert_table_fadt (void)
{
	struct fadt_descriptor_rev2    *local_fadt;
	struct acpi_table_desc         *table_desc;


	ACPI_FUNCTION_TRACE ("tb_convert_table_fadt");


	/*
	 * acpi_gbl_FADT is valid. Validate the FADT length. The table must be
	 * at least as long as the version 1.0 FADT
	 */
	if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev1)) {
		ACPI_REPORT_ERROR (("FADT is invalid, too short: 0x%X\n", acpi_gbl_FADT->length));
		return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
	}

	/* Allocate buffer for the ACPI 2.0(+) FADT */

	local_fadt = ACPI_MEM_CALLOCATE (sizeof (struct fadt_descriptor_rev2));
	if (!local_fadt) {
		return_ACPI_STATUS (AE_NO_MEMORY);
	}

	if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
		if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev2)) {
			/* Length is too short to be a V2.0 table */

			ACPI_REPORT_WARNING (("Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n",
					 acpi_gbl_FADT->length, acpi_gbl_FADT->revision));

			acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
		}
		else {
			/* Valid V2.0 table */

			acpi_tb_convert_fadt2 (local_fadt, acpi_gbl_FADT);
		}
	}
	else {
		/* Valid V1.0 table */

		acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
	}

	/*
	 * Global FADT pointer will point to the new common V2.0 FADT
	 */
	acpi_gbl_FADT = local_fadt;
	acpi_gbl_FADT->length = sizeof (FADT_DESCRIPTOR);

	/* Free the original table */

	table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next;
	acpi_tb_delete_single_table (table_desc);

	/* Install the new table */

	table_desc->pointer     = ACPI_CAST_PTR (struct acpi_table_header, acpi_gbl_FADT);
	table_desc->allocation  = ACPI_MEM_ALLOCATED;
	table_desc->length      = sizeof (struct fadt_descriptor_rev2);

	/* Dump the entire FADT */

	ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
		"Hex dump of common internal FADT, size %d (%X)\n",
		acpi_gbl_FADT->length, acpi_gbl_FADT->length));
	ACPI_DUMP_BUFFER ((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);

	return_ACPI_STATUS (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_convert_table_facs
 *
 * PARAMETERS:  table_info      - Info for currently installed FACS
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
 *              table format.
 *
 ******************************************************************************/

acpi_status
acpi_tb_build_common_facs (
	struct acpi_table_desc          *table_info)
{

	ACPI_FUNCTION_TRACE ("tb_build_common_facs");


	/* Absolute minimum length is 24, but the ACPI spec says 64 */

	if (acpi_gbl_FACS->length < 24) {
		ACPI_REPORT_ERROR (("Invalid FACS table length: 0x%X\n", acpi_gbl_FACS->length));
		return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
	}

	if (acpi_gbl_FACS->length < 64) {
		ACPI_REPORT_WARNING (("FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n",
			acpi_gbl_FACS->length));
	}

	/* Copy fields to the new FACS */

	acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);

	if ((acpi_gbl_RSDP->revision < 2) ||
		(acpi_gbl_FACS->length < 32) ||
		(!(acpi_gbl_FACS->xfirmware_waking_vector))) {
		/* ACPI 1.0 FACS or short table or optional X_ field is zero */

		acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR (u64, &(acpi_gbl_FACS->firmware_waking_vector));
		acpi_gbl_common_fACS.vector_width = 32;
	}
	else {
		/* ACPI 2.0 FACS with valid X_ field */

		acpi_gbl_common_fACS.firmware_waking_vector = &acpi_gbl_FACS->xfirmware_waking_vector;
		acpi_gbl_common_fACS.vector_width = 64;
	}

	return_ACPI_STATUS (AE_OK);
}