Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
new file mode 100644
index 0000000..6e8072e
--- /dev/null
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -0,0 +1,606 @@
+/******************************************************************************
+ *
+ * Module Name: tbxfroot - Find the root ACPI table (RSDT)
+ *
+ *****************************************************************************/
+
+/*
+ * 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 <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT ACPI_TABLES
+ ACPI_MODULE_NAME ("tbxfroot")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_find_table
+ *
+ * PARAMETERS: Signature - String with ACPI table signature
+ * oem_id - String with the table OEM ID
+ * oem_table_id - String with the OEM Table ID.
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Find an ACPI table (in the RSDT/XSDT) that matches the
+ * Signature, OEM ID and OEM Table ID.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_find_table (
+ char *signature,
+ char *oem_id,
+ char *oem_table_id,
+ struct acpi_table_header **table_ptr)
+{
+ acpi_status status;
+ struct acpi_table_header *table;
+
+
+ ACPI_FUNCTION_TRACE ("tb_find_table");
+
+
+ /* Validate string lengths */
+
+ if ((ACPI_STRLEN (signature) > ACPI_NAME_SIZE) ||
+ (ACPI_STRLEN (oem_id) > sizeof (table->oem_id)) ||
+ (ACPI_STRLEN (oem_table_id) > sizeof (table->oem_table_id))) {
+ return_ACPI_STATUS (AE_AML_STRING_LIMIT);
+ }
+
+ if (!ACPI_STRNCMP (signature, DSDT_SIG, ACPI_NAME_SIZE)) {
+ /*
+ * The DSDT pointer is contained in the FADT, not the RSDT.
+ * This code should suffice, because the only code that would perform
+ * a "find" on the DSDT is the data_table_region() AML opcode -- in
+ * which case, the DSDT is guaranteed to be already loaded.
+ * If this becomes insufficient, the FADT will have to be found first.
+ */
+ if (!acpi_gbl_DSDT) {
+ return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+ }
+
+ table = acpi_gbl_DSDT;
+ }
+ else {
+ /* Find the table */
+
+ status = acpi_get_firmware_table (signature, 1,
+ ACPI_LOGICAL_ADDRESSING, &table);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+
+ /* Check oem_id and oem_table_id */
+
+ if ((oem_id[0] && ACPI_STRNCMP (
+ oem_id, table->oem_id, sizeof (table->oem_id))) ||
+ (oem_table_id[0] && ACPI_STRNCMP (
+ oem_table_id, table->oem_table_id, sizeof (table->oem_table_id)))) {
+ return_ACPI_STATUS (AE_AML_NAME_NOT_FOUND);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Found table [%4.4s]\n", table->signature));
+ *table_ptr = table;
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_get_firmware_table
+ *
+ * PARAMETERS: Signature - Any ACPI table signature
+ * Instance - the non zero instance of the table, allows
+ * support for multiple tables of the same type
+ * Flags - Physical/Virtual support
+ * table_pointer - Where a buffer containing the table is
+ * returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to get an ACPI table. A buffer is
+ * allocated for the table and returned in table_pointer.
+ * This table will be a complete table including the header.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_firmware_table (
+ acpi_string signature,
+ u32 instance,
+ u32 flags,
+ struct acpi_table_header **table_pointer)
+{
+ acpi_status status;
+ struct acpi_pointer address;
+ struct acpi_table_header *header = NULL;
+ struct acpi_table_desc *table_info = NULL;
+ struct acpi_table_desc *rsdt_info;
+ u32 table_count;
+ u32 i;
+ u32 j;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_get_firmware_table");
+
+
+ /*
+ * Ensure that at least the table manager is initialized. We don't
+ * require that the entire ACPI subsystem is up for this interface.
+ * If we have a buffer, we must have a length too
+ */
+ if ((instance == 0) ||
+ (!signature) ||
+ (!table_pointer)) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ /* Ensure that we have a RSDP */
+
+ if (!acpi_gbl_RSDP) {
+ /* Get the RSDP */
+
+ status = acpi_os_get_root_pointer (flags, &address);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP not found\n"));
+ return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+ }
+
+ /* Map and validate the RSDP */
+
+ if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
+ status = acpi_os_map_memory (address.pointer.physical, sizeof (struct rsdp_descriptor),
+ (void *) &acpi_gbl_RSDP);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+ }
+ else {
+ acpi_gbl_RSDP = address.pointer.logical;
+ }
+
+ /* The signature and checksum must both be correct */
+
+ if (ACPI_STRNCMP ((char *) acpi_gbl_RSDP, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+ /* Nope, BAD Signature */
+
+ return_ACPI_STATUS (AE_BAD_SIGNATURE);
+ }
+
+ if (acpi_tb_checksum (acpi_gbl_RSDP, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
+ /* Nope, BAD Checksum */
+
+ return_ACPI_STATUS (AE_BAD_CHECKSUM);
+ }
+ }
+
+ /* Get the RSDT address via the RSDP */
+
+ acpi_tb_get_rsdt_address (&address);
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
+ acpi_gbl_RSDP,
+ ACPI_FORMAT_UINT64 (address.pointer.value)));
+
+ /* Insert processor_mode flags */
+
+ address.pointer_type |= flags;
+
+ /* Get and validate the RSDT */
+
+ rsdt_info = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
+ if (!rsdt_info) {
+ return_ACPI_STATUS (AE_NO_MEMORY);
+ }
+
+ status = acpi_tb_get_table (&address, rsdt_info);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ status = acpi_tb_validate_rsdt (rsdt_info->pointer);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ /* Allocate a scratch table header and table descriptor */
+
+ header = ACPI_MEM_ALLOCATE (sizeof (struct acpi_table_header));
+ if (!header) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ table_info = ACPI_MEM_ALLOCATE (sizeof (struct acpi_table_desc));
+ if (!table_info) {
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ /* Get the number of table pointers within the RSDT */
+
+ table_count = acpi_tb_get_table_count (acpi_gbl_RSDP, rsdt_info->pointer);
+ address.pointer_type = acpi_gbl_table_flags | flags;
+
+ /*
+ * Search the RSDT/XSDT for the correct instance of the
+ * requested table
+ */
+ for (i = 0, j = 0; i < table_count; i++) {
+ /* Get the next table pointer, handle RSDT vs. XSDT */
+
+ if (acpi_gbl_RSDP->revision < 2) {
+ address.pointer.value = (ACPI_CAST_PTR (
+ RSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
+ }
+ else {
+ address.pointer.value = (ACPI_CAST_PTR (
+ XSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
+ }
+
+ /* Get the table header */
+
+ status = acpi_tb_get_table_header (&address, header);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ /* Compare table signatures and table instance */
+
+ if (!ACPI_STRNCMP (header->signature, signature, ACPI_NAME_SIZE)) {
+ /* An instance of the table was found */
+
+ j++;
+ if (j >= instance) {
+ /* Found the correct instance, get the entire table */
+
+ status = acpi_tb_get_table_body (&address, header, table_info);
+ if (ACPI_FAILURE (status)) {
+ goto cleanup;
+ }
+
+ *table_pointer = table_info->pointer;
+ goto cleanup;
+ }
+ }
+ }
+
+ /* Did not find the table */
+
+ status = AE_NOT_EXIST;
+
+
+cleanup:
+ acpi_os_unmap_memory (rsdt_info->pointer, (acpi_size) rsdt_info->pointer->length);
+ ACPI_MEM_FREE (rsdt_info);
+
+ if (header) {
+ ACPI_MEM_FREE (header);
+ }
+ if (table_info) {
+ ACPI_MEM_FREE (table_info);
+ }
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_firmware_table);
+
+
+/* TBD: Move to a new file */
+
+#if ACPI_MACHINE_WIDTH != 16
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_find_root_pointer
+ *
+ * PARAMETERS: **rsdp_address - Where to place the RSDP address
+ * Flags - Logical/Physical addressing
+ *
+ * RETURN: Status, Physical address of the RSDP
+ *
+ * DESCRIPTION: Find the RSDP
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_find_root_pointer (
+ u32 flags,
+ struct acpi_pointer *rsdp_address)
+{
+ struct acpi_table_desc table_info;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_find_root_pointer");
+
+
+ /* Get the RSDP */
+
+ status = acpi_tb_find_rsdp (&table_info, flags);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "RSDP structure not found, %s Flags=%X\n",
+ acpi_format_exception (status), flags));
+ return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+ }
+
+ rsdp_address->pointer_type = ACPI_PHYSICAL_POINTER;
+ rsdp_address->pointer.physical = table_info.physical_address;
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * 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)
+{
+ u8 *mem_rover;
+ u8 *end_address;
+ u8 checksum;
+
+
+ ACPI_FUNCTION_TRACE ("tb_scan_memory_for_rsdp");
+
+
+ end_address = start_address + length;
+
+ /* Search from given start address for the requested length */
+
+ for (mem_rover = start_address; mem_rover < end_address;
+ mem_rover += ACPI_RSDP_SCAN_STEP) {
+ /* The signature and checksum must both be correct */
+
+ if (ACPI_STRNCMP ((char *) mem_rover, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+ /* No signature match, keep looking */
+
+ continue;
+ }
+
+ /* Signature matches, check the appropriate checksum */
+
+ if ((ACPI_CAST_PTR (struct rsdp_descriptor, mem_rover))->revision < 2) {
+ /* ACPI version 1.0 */
+
+ checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_CHECKSUM_LENGTH);
+ }
+ else {
+ /* Post ACPI 1.0, use extended_checksum */
+
+ checksum = acpi_tb_checksum (mem_rover, ACPI_RSDP_XCHECKSUM_LENGTH);
+ }
+
+ if (checksum == 0) {
+ /* Checksum valid, we have found a valid RSDP */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "RSDP located at physical address %p\n", mem_rover));
+ return_PTR (mem_rover);
+ }
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "Found an RSDP at physical address %p, but it has a bad checksum\n",
+ mem_rover));
+ }
+
+ /* Searched entire block, no RSDP was found */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "Searched entire block, no valid RSDP was found.\n"));
+ return_PTR (NULL);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_tb_find_rsdp
+ *
+ * PARAMETERS: *table_info - Where the table info is returned
+ * Flags - Current memory mode (logical vs.
+ * physical addressing)
+ *
+ * RETURN: Status, RSDP physical address
+ *
+ * DESCRIPTION: search lower 1_mbyte of memory for the root system descriptor
+ * pointer structure. If it is found, set *RSDP to point to it.
+ *
+ * NOTE1: The RSDp must be either in the first 1_k of the Extended
+ * BIOS Data Area or between E0000 and FFFFF (From ACPI Spec.)
+ * Only a 32-bit physical address is necessary.
+ *
+ * NOTE2: This function is always available, regardless of the
+ * initialization state of the rest of ACPI.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_find_rsdp (
+ struct acpi_table_desc *table_info,
+ u32 flags)
+{
+ u8 *table_ptr;
+ u8 *mem_rover;
+ u32 physical_address;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("tb_find_rsdp");
+
+
+ /*
+ * Scan supports either 1) Logical addressing or 2) Physical addressing
+ */
+ if ((flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING) {
+ /*
+ * 1a) Get the location of the EBDA
+ */
+ status = acpi_os_map_memory ((acpi_physical_address) ACPI_EBDA_PTR_LOCATION,
+ ACPI_EBDA_PTR_LENGTH,
+ (void *) &table_ptr);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Could not map memory at %8.8X for length %X\n",
+ ACPI_EBDA_PTR_LOCATION, ACPI_EBDA_PTR_LENGTH));
+ return_ACPI_STATUS (status);
+ }
+
+ ACPI_MOVE_16_TO_32 (&physical_address, table_ptr);
+ physical_address <<= 4; /* Convert segment to physical address */
+ acpi_os_unmap_memory (table_ptr, ACPI_EBDA_PTR_LENGTH);
+
+ /* EBDA present? */
+
+ if (physical_address > 0x400) {
+ /*
+ * 1b) Search EBDA paragraphs (EBDa is required to be a minimum of 1_k length)
+ */
+ status = acpi_os_map_memory ((acpi_physical_address) physical_address,
+ ACPI_EBDA_WINDOW_SIZE,
+ (void *) &table_ptr);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Could not map memory at %8.8X for length %X\n",
+ physical_address, ACPI_EBDA_WINDOW_SIZE));
+ return_ACPI_STATUS (status);
+ }
+
+ mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_EBDA_WINDOW_SIZE);
+ acpi_os_unmap_memory (table_ptr, ACPI_EBDA_WINDOW_SIZE);
+
+ if (mem_rover) {
+ /* Found it, return the physical address */
+
+ physical_address += ACPI_PTR_DIFF (mem_rover, table_ptr);
+
+ table_info->physical_address = (acpi_physical_address) physical_address;
+ return_ACPI_STATUS (AE_OK);
+ }
+ }
+
+ /*
+ * 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
+ */
+ status = acpi_os_map_memory ((acpi_physical_address) ACPI_HI_RSDP_WINDOW_BASE,
+ ACPI_HI_RSDP_WINDOW_SIZE,
+ (void *) &table_ptr);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+ "Could not map memory at %8.8X for length %X\n",
+ ACPI_HI_RSDP_WINDOW_BASE, ACPI_HI_RSDP_WINDOW_SIZE));
+ return_ACPI_STATUS (status);
+ }
+
+ mem_rover = acpi_tb_scan_memory_for_rsdp (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
+ acpi_os_unmap_memory (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
+
+ if (mem_rover) {
+ /* Found it, return the physical address */
+
+ physical_address = ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr);
+
+ table_info->physical_address = (acpi_physical_address) physical_address;
+ return_ACPI_STATUS (AE_OK);
+ }
+ }
+
+ /*
+ * Physical addressing
+ */
+ else {
+ /*
+ * 1a) Get the location of the EBDA
+ */
+ ACPI_MOVE_16_TO_32 (&physical_address, ACPI_EBDA_PTR_LOCATION);
+ physical_address <<= 4; /* Convert segment to physical address */
+
+ /* EBDA present? */
+
+ if (physical_address > 0x400) {
+ /*
+ * 1b) Search EBDA paragraphs (EBDa is required to be a minimum of 1_k length)
+ */
+ mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (physical_address),
+ ACPI_EBDA_WINDOW_SIZE);
+ if (mem_rover) {
+ /* Found it, return the physical address */
+
+ table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
+ return_ACPI_STATUS (AE_OK);
+ }
+ }
+
+ /*
+ * 2) Search upper memory: 16-byte boundaries in E0000h-FFFFFh
+ */
+ mem_rover = acpi_tb_scan_memory_for_rsdp (ACPI_PHYSADDR_TO_PTR (ACPI_HI_RSDP_WINDOW_BASE),
+ ACPI_HI_RSDP_WINDOW_SIZE);
+ if (mem_rover) {
+ /* Found it, return the physical address */
+
+ table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
+ return_ACPI_STATUS (AE_OK);
+ }
+ }
+
+ /* RSDP signature was not found */
+
+ return_ACPI_STATUS (AE_NOT_FOUND);
+}
+
+#endif
+