X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Facpi%2Ftables%2Ftbconvrt.c;h=334327c1f66f5b965ca1c4528881a3b3d3cea2b0;hb=6a77f38946aaee1cd85eeec6cf4229b204c15071;hp=ee68188326652d6642bd13ca00d80a57df7d705f;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git

diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c
index ee6818832..334327c1f 100644
--- a/drivers/acpi/tables/tbconvrt.c
+++ b/drivers/acpi/tables/tbconvrt.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2004, R. Byron Moore
+ * Copyright (C) 2000 - 2005, R. Byron Moore
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -41,6 +41,7 @@
  * POSSIBILITY OF SUCH DAMAGES.
  */
 
+#include <linux/module.h>
 
 #include <acpi/acpi.h>
 #include <acpi/actables.h>
@@ -50,6 +51,9 @@
 	 ACPI_MODULE_NAME    ("tbconvrt")
 
 
+u8 acpi_fadt_is_v1;
+EXPORT_SYMBOL(acpi_fadt_is_v1);
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_tb_get_table_count
@@ -186,7 +190,7 @@ acpi_tb_init_generic_address (
 	new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
 	new_gas_struct->register_bit_width = register_bit_width;
 	new_gas_struct->register_bit_offset = 0;
-	new_gas_struct->reserved        = 0;
+	new_gas_struct->access_width    = 0;
 }
 
 
@@ -212,6 +216,7 @@ acpi_tb_convert_fadt1 (
 
 	/* ACPI 1.0 FACS */
 	/* The BIOS stored FADT should agree with Revision 1.0 */
+	acpi_fadt_is_v1 = 1;
 
 	/*
 	 * Copy the table header and the common part of the tables.
@@ -240,9 +245,12 @@ acpi_tb_convert_fadt1 (
 	/*
 	 * Processor Performance State Control. This is the value OSPM writes to
 	 * the SMI_CMD register to assume processor performance state control
-	 * responsibility. There isn't any equivalence in 1.0, leave it zeroed.
+	 * responsibility. There isn't any equivalence in 1.0, but as many 1.x
+	 * ACPI tables contain _PCT and _PSS we also keep this value, unless
+	 * acpi_strict is set.
 	 */
-	local_fadt->pstate_cnt = 0;
+	if (acpi_strict)
+		local_fadt->pstate_cnt = 0;
 
 	/*
 	 * Support for the _CST object and C States change notification.
@@ -251,10 +259,26 @@ acpi_tb_convert_fadt1 (
 	local_fadt->cst_cnt = 0;
 
 	/*
-	 * Since there isn't any equivalence in 1.0 and since it highly likely
-	 * that a 1.0 system has legacy support.
+	 * FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0.
+	 * It primarily adds the FADT reset mechanism.
 	 */
-	local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
+	if ((original_fadt->revision == 2) &&
+		(original_fadt->length == sizeof (struct fadt_descriptor_rev2_minus))) {
+		/*
+		 * Grab the entire generic address struct, plus the 1-byte reset value
+		 * that immediately follows.
+		 */
+		ACPI_MEMCPY (&local_fadt->reset_register,
+			&(ACPI_CAST_PTR (struct fadt_descriptor_rev2_minus, original_fadt))->reset_register,
+  			sizeof (struct acpi_generic_address) + 1);
+	}
+	else {
+		/*
+		 * Since there isn't any equivalence in 1.0 and since it is highly
+		 * likely that a 1.0 system has legacy support.
+		 */
+		local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
+	}
 
 	/*
 	 * Convert the V1.0 block addresses to V2.0 GAS structures
@@ -418,23 +442,21 @@ acpi_tb_convert_table_fadt (void)
 
 
 	/*
-	 * acpi_gbl_FADT is valid
-	 * Allocate and zero the 2.0 FADT buffer
-	 */
-	local_fadt = ACPI_MEM_CALLOCATE (sizeof (struct fadt_descriptor_rev2));
-	if (local_fadt == NULL) {
-		return_ACPI_STATUS (AE_NO_MEMORY);
-	}
-
-	/*
-	 * FADT length and version validation.  The table must be at least as
-	 * long as the version 1.0 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 (("Invalid FADT table length: 0x%X\n", acpi_gbl_FADT->length));
+		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 */
@@ -488,7 +510,7 @@ acpi_tb_convert_table_fadt (void)
  *
  * FUNCTION:    acpi_tb_convert_table_facs
  *
- * PARAMETERS:  table_info      - Info for currently installad FACS
+ * PARAMETERS:  table_info      - Info for currently installed FACS
  *
  * RETURN:      Status
  *