patch-2.4.0-prerelease linux/drivers/acpi/tables/tbtable.c

• Lines: 393
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test12/linux/drivers/acpi/tables/tbtable.c
• Orig date: Sun Oct 8 10:50:15 2000

diff -u --recursive --new-file v2.4.0-test12/linux/drivers/acpi/tables/tbtable.c linux/drivers/acpi/tables/tbtable.c
@@ -1,392 +0,0 @@
-/******************************************************************************
- *
- * Module Name: tbtable - ACPI tables: FACP, FACS, and RSDP utilities
- *              $Revision: 24 $
- *
- *****************************************************************************/
-
-/*
- *  Copyright (C) 2000 R. Byron Moore
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-
-#include "acpi.h"
-#include "achware.h"
-#include "actables.h"
-
-
-#define _COMPONENT          TABLE_MANAGER
-	 MODULE_NAME         ("tbtable")
-
-
-/*******************************************************************************
- *
- * 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_STATUS             status = AE_OK;
-	ACPI_TABLE_DESC         table_info;
-
-
-	/* Get the RSDP */
-
-	status = acpi_tb_find_rsdp (&table_info);
-	if (ACPI_FAILURE (status)) {
-		REPORT_WARNING ("RSDP structure not found");
-		return (AE_NO_ACPI_TABLES);
-	}
-
-	/* Save the table pointers and allocation info */
-
-	status = acpi_tb_init_table_descriptor (ACPI_TABLE_RSDP, &table_info);
-	if (ACPI_FAILURE (status)) {
-		return (status);
-	}
-
-	acpi_gbl_RSDP = (ROOT_SYSTEM_DESCRIPTOR_POINTER *) table_info.pointer;
-
-
-	/*
-	 * RSDP structure was found;  Now get the RSDT
-	 */
-
-	status = acpi_tb_get_table ((void *) acpi_gbl_RSDP->rsdt_physical_address, NULL,
-			 &table_info);
-	if (ACPI_FAILURE (status)) {
-		if (status == AE_BAD_SIGNATURE) {
-			/* Invalid RSDT signature */
-
-			REPORT_ERROR ("Invalid signature where RSDP indicates RSDT should be located");
-
-		}
-		REPORT_ERROR ("Unable to locate RSDT");
-
-		return (status);
-	}
-
-
-	/* Always delete the RSDP mapping */
-
-	acpi_tb_delete_acpi_table (ACPI_TABLE_RSDP);
-
-	/* Save the table pointers and allocation info */
-
-	status = acpi_tb_init_table_descriptor (ACPI_TABLE_RSDT, &table_info);
-	if (ACPI_FAILURE (status)) {
-		return (status);
-	}
-
-	acpi_gbl_RSDT = (ROOT_SYSTEM_DESCRIPTION_TABLE *) table_info.pointer;
-
-
-	/* Valid RSDT signature, verify the checksum */
-
-	status = acpi_tb_verify_table_checksum ((ACPI_TABLE_HEADER *) acpi_gbl_RSDT);
-
-	/*
-	 * Determine the number of tables pointed to by the RSDT.
-	 * This is defined by the ACPI Specification to be the number of
-	 * pointers contained within the RSDT.  The size of the pointers
-	 * is architecture-dependent.
-	 */
-
-	*number_of_tables = ((acpi_gbl_RSDT->header.length -
-			   sizeof (ACPI_TABLE_HEADER)) / sizeof (void *));
-
-
-	return (status);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_tb_scan_memory_for_rsdp
- *
- * PARAMETERS:  Start_address       - Starting pointer for search
- *              Length              - Maximum length to search
- *
- * RETURN:      Pointer to the RSDP if found, otherwise NULL.
- *
- * DESCRIPTION: Search a block of memory for the RSDP signature
- *
- ******************************************************************************/
-
-u8 *
-acpi_tb_scan_memory_for_rsdp (
-	u8                      *start_address,
-	u32                     length)
-{
-	u32                     offset;
-	u8                      *mem_rover;
-
-
-	/* Search from given start addr for the requested length  */
-
-	for (offset = 0, mem_rover = start_address;
-		 offset < length;
-		 offset += RSDP_SCAN_STEP, mem_rover += RSDP_SCAN_STEP)
-	{
-
-		/* The signature and checksum must both be correct */
-
-		if (STRNCMP ((NATIVE_CHAR *) mem_rover, RSDP_SIG, sizeof (RSDP_SIG)-1) == 0 &&
-			acpi_tb_checksum (mem_rover,
-				sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER)) == 0)
-		{
-			/* If so, we have found the RSDP */
-
-			return (mem_rover);
-		}
-	}
-
-	/* Searched entire block, no RSDP was found */
-
-	return (NULL);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_tb_find_rsdp
- *
- * PARAMETERS:  *Buffer_ptr             - If == NULL, read data from buffer
- *                                        rather than searching memory
- *              *Table_info             - Where the table info is returned
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Search lower 1_mbyte of memory for the root system descriptor
- *              pointer structure.  If it is found, set *RSDP to point to it.
- *
- *              NOTE: The RSDP must be either in the first 1_k of the Extended
- *              BIOS Data Area or between E0000 and FFFFF (ACPI 1.0 section
- *              5.2.2; assertion #421).
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_tb_find_rsdp (
-	ACPI_TABLE_DESC         *table_info)
-{
-	u8                      *table_ptr;
-	u8                      *mem_rover;
-	ACPI_STATUS             status = AE_OK;
-
-	if (acpi_gbl_acpi_init_data.RSDP_physical_address) {
-		/*
-		 *  RSDP address was supplied as part of the initialization data
-		 */
-
-		status = acpi_os_map_memory(acpi_gbl_acpi_init_data.RSDP_physical_address,
-				 sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER),
-				 (void **)&table_ptr);
-
-		if (ACPI_FAILURE (status)) {
-			return (status);
-		}
-
-		if (!table_ptr) {
-			return (AE_NO_MEMORY);
-		}
-
-		/*
-		 *  The signature and checksum must both be correct
-		 */
-
-		if (STRNCMP ((NATIVE_CHAR *) table_ptr, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
-			/* Nope, BAD Signature */
-			acpi_os_unmap_memory (table_ptr, sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER));
-			return (AE_BAD_SIGNATURE);
-		}
-
-		/* The signature and checksum must both be correct */
-
-		if (acpi_tb_checksum (table_ptr,
-				sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER)) != 0)
-		{
-			/* Nope, BAD Checksum */
-			acpi_os_unmap_memory (table_ptr, sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER));
-			return (AE_BAD_CHECKSUM);
-		}
-
-		/* RSDP supplied is OK */
-		/* If so, we have found the RSDP */
-
-		table_info->pointer     = (ACPI_TABLE_HEADER *) table_ptr;
-		table_info->length      = sizeof (ROOT_SYSTEM_DESCRIPTOR_POINTER);
-		table_info->allocation  = ACPI_MEM_MAPPED;
-		table_info->base_pointer = table_ptr;
-
-		return (AE_OK);
-	}
-
-	/*
-	 * Search memory for RSDP.  First map low physical memory.
-	 */
-
-	status = acpi_os_map_memory (LO_RSDP_WINDOW_BASE, LO_RSDP_WINDOW_SIZE,
-			  (void **)&table_ptr);
-
-	if (ACPI_FAILURE (status)) {
-		return (status);
-	}
-
-	/*
-	 * 1) Search EBDA (low memory) paragraphs
-	 */
-
-	if (NULL != (mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr,
-			  LO_RSDP_WINDOW_SIZE)))
-	{
-		/* Found it, return pointer and don't delete the mapping */
-
-		table_info->pointer     = (ACPI_TABLE_HEADER *) mem_rover;
-		table_info->length      = LO_RSDP_WINDOW_SIZE;
-		table_info->allocation  = ACPI_MEM_MAPPED;
-		table_info->base_pointer = table_ptr;
-
-		return (AE_OK);
-	}
-
-	/* This mapping is no longer needed */
-
-	acpi_os_unmap_memory (table_ptr, LO_RSDP_WINDOW_SIZE);
-
-
-	/*
-	 * 2) Search upper memory: 16-byte boundaries in E0000h-F0000h
-	 */
-
-	status = acpi_os_map_memory (HI_RSDP_WINDOW_BASE, HI_RSDP_WINDOW_SIZE,
-			  (void **)&table_ptr);
-
-	if (ACPI_FAILURE (status)) {
-		return (status);
-	}
-
-	if (NULL != (mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr,
-			  HI_RSDP_WINDOW_SIZE)))
-	{
-		/* Found it, return pointer and don't delete the mapping */
-
-		table_info->pointer     = (ACPI_TABLE_HEADER *) mem_rover;
-		table_info->length      = HI_RSDP_WINDOW_SIZE;
-		table_info->allocation  = ACPI_MEM_MAPPED;
-		table_info->base_pointer = table_ptr;
-
-		return (AE_OK);
-	}
-
-	/* This mapping is no longer needed */
-
-	acpi_os_unmap_memory (table_ptr, HI_RSDP_WINDOW_SIZE);
-
-
-	/* RSDP signature was not found */
-
-	return (AE_NOT_FOUND);
-}
-
-
-/******************************************************************************
- *
- * 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 FACP.  This
- *              function assumes the global variable FACP has been
- *              correctly initialized.  The value of FACP->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 FACP pointer */
-
-	if (!acpi_gbl_FACP) {
-		return (AE_NO_ACPI_TABLES);
-	}
-
-	size = sizeof (FIRMWARE_ACPI_CONTROL_STRUCTURE);
-	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 ((void *) acpi_gbl_FACP->firmware_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);
-}
-