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path: root/drivers/acpi/acpica/tbinstal.c
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Diffstat (limited to 'drivers/acpi/acpica/tbinstal.c')
-rw-r--r--drivers/acpi/acpica/tbinstal.c837
1 files changed, 316 insertions, 521 deletions
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index e3040947e9a0..755b90c40ddf 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -43,688 +43,483 @@
#include <acpi/acpi.h>
#include "accommon.h"
-#include "acnamesp.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbinstal")
-/******************************************************************************
+/* Local prototypes */
+static u8
+acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index);
+
+/*******************************************************************************
*
- * FUNCTION: acpi_tb_verify_table
+ * FUNCTION: acpi_tb_compare_tables
*
- * PARAMETERS: table_desc - table
+ * PARAMETERS: table_desc - Table 1 descriptor to be compared
+ * table_index - Index of table 2 to be compared
*
- * RETURN: Status
+ * RETURN: TRUE if both tables are identical.
*
- * DESCRIPTION: this function is called to verify and map table
+ * DESCRIPTION: This function compares a table with another table that has
+ * already been installed in the root table list.
*
- *****************************************************************************/
-acpi_status acpi_tb_verify_table(struct acpi_table_desc *table_desc)
+ ******************************************************************************/
+
+static u8
+acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
{
acpi_status status = AE_OK;
+ u8 is_identical;
+ struct acpi_table_header *table;
+ u32 table_length;
+ u8 table_flags;
- ACPI_FUNCTION_TRACE(tb_verify_table);
-
- /* Map the table if necessary */
-
- if (!table_desc->pointer) {
- if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
- ACPI_TABLE_ORIGIN_MAPPED) {
- table_desc->pointer =
- acpi_os_map_memory(table_desc->address,
- table_desc->length);
- }
- if (!table_desc->pointer) {
- return_ACPI_STATUS(AE_NO_MEMORY);
- }
+ status =
+ acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
+ &table, &table_length, &table_flags);
+ if (ACPI_FAILURE(status)) {
+ return (FALSE);
}
- /* Always calculate checksum, ignore bad checksum if requested */
+ /*
+ * Check for a table match on the entire table length,
+ * not just the header.
+ */
+ is_identical = (u8)((table_desc->length != table_length ||
+ ACPI_MEMCMP(table_desc->pointer, table,
+ table_length)) ? FALSE : TRUE);
- status =
- acpi_tb_verify_checksum(table_desc->pointer, table_desc->length);
+ /* Release the acquired table */
- return_ACPI_STATUS(status);
+ acpi_tb_release_table(table, table_length, table_flags);
+ return (is_identical);
}
/*******************************************************************************
*
- * FUNCTION: acpi_tb_add_table
+ * FUNCTION: acpi_tb_install_table_with_override
*
- * PARAMETERS: table_desc - Table descriptor
- * table_index - Where the table index is returned
+ * PARAMETERS: table_index - Index into root table array
+ * new_table_desc - New table descriptor to install
+ * override - Whether override should be performed
*
- * RETURN: Status
+ * RETURN: None
*
- * DESCRIPTION: This function is called to add an ACPI table. It is used to
- * dynamically load tables via the Load and load_table AML
- * operators.
+ * DESCRIPTION: Install an ACPI table into the global data structure. The
+ * table override mechanism is called to allow the host
+ * OS to replace any table before it is installed in the root
+ * table array.
*
******************************************************************************/
-acpi_status
-acpi_tb_add_table(struct acpi_table_desc *table_desc, u32 *table_index)
+void
+acpi_tb_install_table_with_override(u32 table_index,
+ struct acpi_table_desc *new_table_desc,
+ u8 override)
{
- u32 i;
- acpi_status status = AE_OK;
- ACPI_FUNCTION_TRACE(tb_add_table);
-
- if (!table_desc->pointer) {
- status = acpi_tb_verify_table(table_desc);
- if (ACPI_FAILURE(status) || !table_desc->pointer) {
- return_ACPI_STATUS(status);
- }
+ if (table_index >= acpi_gbl_root_table_list.current_table_count) {
+ return;
}
/*
- * Validate the incoming table signature.
+ * ACPI Table Override:
*
- * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
- * 2) We added support for OEMx tables, signature "OEM".
- * 3) Valid tables were encountered with a null signature, so we just
- * gave up on validating the signature, (05/2008).
- * 4) We encountered non-AML tables such as the MADT, which caused
- * interpreter errors and kernel faults. So now, we once again allow
- * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
+ * Before we install the table, let the host OS override it with a new
+ * one if desired. Any table within the RSDT/XSDT can be replaced,
+ * including the DSDT which is pointed to by the FADT.
*/
- if ((table_desc->pointer->signature[0] != 0x00) &&
- (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
- && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
- ACPI_BIOS_ERROR((AE_INFO,
- "Table has invalid signature [%4.4s] (0x%8.8X), "
- "must be SSDT or OEMx",
- acpi_ut_valid_acpi_name(table_desc->pointer->
- signature) ?
- table_desc->pointer->signature : "????",
- *(u32 *)table_desc->pointer->signature));
-
- return_ACPI_STATUS(AE_BAD_SIGNATURE);
+ if (override) {
+ acpi_tb_override_table(new_table_desc);
}
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+ acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.
+ tables[table_index],
+ new_table_desc->address,
+ new_table_desc->flags,
+ new_table_desc->pointer);
- /* Check if table is already registered */
+ acpi_tb_print_table_header(new_table_desc->address,
+ new_table_desc->pointer);
- for (i = 0; i < acpi_gbl_root_table_list.current_table_count; ++i) {
- if (!acpi_gbl_root_table_list.tables[i].pointer) {
- status =
- acpi_tb_verify_table(&acpi_gbl_root_table_list.
- tables[i]);
- if (ACPI_FAILURE(status)
- || !acpi_gbl_root_table_list.tables[i].pointer) {
- continue;
- }
- }
+ /* Set the global integer width (based upon revision of the DSDT) */
- /*
- * Check for a table match on the entire table length,
- * not just the header.
- */
- if (table_desc->length !=
- acpi_gbl_root_table_list.tables[i].length) {
- continue;
- }
-
- if (ACPI_MEMCMP(table_desc->pointer,
- acpi_gbl_root_table_list.tables[i].pointer,
- acpi_gbl_root_table_list.tables[i].length)) {
- continue;
- }
-
- /*
- * Note: the current mechanism does not unregister a table if it is
- * dynamically unloaded. The related namespace entries are deleted,
- * but the table remains in the root table list.
- *
- * The assumption here is that the number of different tables that
- * will be loaded is actually small, and there is minimal overhead
- * in just keeping the table in case it is needed again.
- *
- * If this assumption changes in the future (perhaps on large
- * machines with many table load/unload operations), tables will
- * need to be unregistered when they are unloaded, and slots in the
- * root table list should be reused when empty.
- */
-
- /*
- * Table is already registered.
- * We can delete the table that was passed as a parameter.
- */
- acpi_tb_delete_table(table_desc);
- *table_index = i;
-
- if (acpi_gbl_root_table_list.tables[i].
- flags & ACPI_TABLE_IS_LOADED) {
-
- /* Table is still loaded, this is an error */
-
- status = AE_ALREADY_EXISTS;
- goto release;
- } else {
- /* Table was unloaded, allow it to be reloaded */
-
- table_desc->pointer =
- acpi_gbl_root_table_list.tables[i].pointer;
- table_desc->address =
- acpi_gbl_root_table_list.tables[i].address;
- status = AE_OK;
- goto print_header;
- }
+ if (table_index == ACPI_TABLE_INDEX_DSDT) {
+ acpi_ut_set_integer_width(new_table_desc->pointer->revision);
}
-
- /*
- * ACPI Table Override:
- * Allow the host to override dynamically loaded tables.
- * NOTE: the table is fully mapped at this point, and the mapping will
- * be deleted by tb_table_override if the table is actually overridden.
- */
- (void)acpi_tb_table_override(table_desc->pointer, table_desc);
-
- /* Add the table to the global root table list */
-
- status = acpi_tb_store_table(table_desc->address, table_desc->pointer,
- table_desc->length, table_desc->flags,
- table_index);
- if (ACPI_FAILURE(status)) {
- goto release;
- }
-
-print_header:
- acpi_tb_print_table_header(table_desc->address, table_desc->pointer);
-
-release:
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- return_ACPI_STATUS(status);
}
/*******************************************************************************
*
- * FUNCTION: acpi_tb_table_override
+ * FUNCTION: acpi_tb_install_fixed_table
*
- * PARAMETERS: table_header - Header for the original table
- * table_desc - Table descriptor initialized for the
- * original table. May or may not be mapped.
+ * PARAMETERS: address - Physical address of DSDT or FACS
+ * signature - Table signature, NULL if no need to
+ * match
+ * table_index - Index into root table array
*
- * RETURN: Pointer to the entire new table. NULL if table not overridden.
- * If overridden, installs the new table within the input table
- * descriptor.
+ * RETURN: Status
*
- * DESCRIPTION: Attempt table override by calling the OSL override functions.
- * Note: If the table is overridden, then the entire new table
- * is mapped and returned by this function.
+ * DESCRIPTION: Install a fixed ACPI table (DSDT/FACS) into the global data
+ * structure.
*
******************************************************************************/
-struct acpi_table_header *acpi_tb_table_override(struct acpi_table_header
- *table_header,
- struct acpi_table_desc
- *table_desc)
+acpi_status
+acpi_tb_install_fixed_table(acpi_physical_address address,
+ char *signature, u32 table_index)
{
+ struct acpi_table_desc new_table_desc;
acpi_status status;
- struct acpi_table_header *new_table = NULL;
- acpi_physical_address new_address = 0;
- u32 new_table_length = 0;
- u8 new_flags;
- char *override_type;
- /* (1) Attempt logical override (returns a logical address) */
+ ACPI_FUNCTION_TRACE(tb_install_fixed_table);
- status = acpi_os_table_override(table_header, &new_table);
- if (ACPI_SUCCESS(status) && new_table) {
- new_address = ACPI_PTR_TO_PHYSADDR(new_table);
- new_table_length = new_table->length;
- new_flags = ACPI_TABLE_ORIGIN_OVERRIDE;
- override_type = "Logical";
- goto finish_override;
+ if (!address) {
+ ACPI_ERROR((AE_INFO,
+ "Null physical address for ACPI table [%s]",
+ signature));
+ return (AE_NO_MEMORY);
}
- /* (2) Attempt physical override (returns a physical address) */
+ /* Fill a table descriptor for validation */
- status = acpi_os_physical_table_override(table_header,
- &new_address,
- &new_table_length);
- if (ACPI_SUCCESS(status) && new_address && new_table_length) {
-
- /* Map the entire new table */
-
- new_table = acpi_os_map_memory(new_address, new_table_length);
- if (!new_table) {
- ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY,
- "%4.4s " ACPI_PRINTF_UINT
- " Attempted physical table override failed",
- table_header->signature,
- ACPI_FORMAT_TO_UINT(table_desc->
- address)));
- return (NULL);
- }
-
- override_type = "Physical";
- new_flags = ACPI_TABLE_ORIGIN_MAPPED;
- goto finish_override;
+ status = acpi_tb_acquire_temp_table(&new_table_desc, address,
+ ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
+ ACPI_CAST_PTR(void, address)));
+ return_ACPI_STATUS(status);
}
- return (NULL); /* There was no override */
-
-finish_override:
-
- ACPI_INFO((AE_INFO, "%4.4s " ACPI_PRINTF_UINT
- " %s table override, new table: " ACPI_PRINTF_UINT,
- table_header->signature,
- ACPI_FORMAT_TO_UINT(table_desc->address),
- override_type, ACPI_FORMAT_TO_UINT(new_table)));
+ /* Validate and verify a table before installation */
- /* We can now unmap/delete the original table (if fully mapped) */
+ status = acpi_tb_verify_temp_table(&new_table_desc, signature);
+ if (ACPI_FAILURE(status)) {
+ goto release_and_exit;
+ }
- acpi_tb_delete_table(table_desc);
+ acpi_tb_install_table_with_override(table_index, &new_table_desc, TRUE);
- /* Setup descriptor for the new table */
+release_and_exit:
- table_desc->address = new_address;
- table_desc->pointer = new_table;
- table_desc->length = new_table_length;
- table_desc->flags = new_flags;
+ /* Release the temporary table descriptor */
- return (new_table);
+ acpi_tb_release_temp_table(&new_table_desc);
+ return_ACPI_STATUS(status);
}
/*******************************************************************************
*
- * FUNCTION: acpi_tb_resize_root_table_list
+ * FUNCTION: acpi_tb_install_standard_table
*
- * PARAMETERS: None
+ * PARAMETERS: address - Address of the table (might be a virtual
+ * address depending on the table_flags)
+ * flags - Flags for the table
+ * reload - Whether reload should be performed
+ * override - Whether override should be performed
+ * table_index - Where the table index is returned
*
* RETURN: Status
*
- * DESCRIPTION: Expand the size of global table array
+ * DESCRIPTION: This function is called to install an ACPI table that is
+ * neither DSDT nor FACS (a "standard" table.)
+ * When this function is called by "Load" or "LoadTable" opcodes,
+ * or by acpi_load_table() API, the "Reload" parameter is set.
+ * After sucessfully returning from this function, table is
+ * "INSTALLED" but not "VALIDATED".
*
******************************************************************************/
-acpi_status acpi_tb_resize_root_table_list(void)
+acpi_status
+acpi_tb_install_standard_table(acpi_physical_address address,
+ u8 flags,
+ u8 reload, u8 override, u32 *table_index)
{
- struct acpi_table_desc *tables;
- u32 table_count;
-
- ACPI_FUNCTION_TRACE(tb_resize_root_table_list);
-
- /* allow_resize flag is a parameter to acpi_initialize_tables */
+ u32 i;
+ acpi_status status = AE_OK;
+ struct acpi_table_desc new_table_desc;
- if (!(acpi_gbl_root_table_list.flags & ACPI_ROOT_ALLOW_RESIZE)) {
- ACPI_ERROR((AE_INFO,
- "Resize of Root Table Array is not allowed"));
- return_ACPI_STATUS(AE_SUPPORT);
- }
+ ACPI_FUNCTION_TRACE(tb_install_standard_table);
- /* Increase the Table Array size */
+ /* Acquire a temporary table descriptor for validation */
- if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
- table_count = acpi_gbl_root_table_list.max_table_count;
- } else {
- table_count = acpi_gbl_root_table_list.current_table_count;
+ status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags);
+ if (ACPI_FAILURE(status)) {
+ ACPI_ERROR((AE_INFO, "Could not acquire table length at %p",
+ ACPI_CAST_PTR(void, address)));
+ return_ACPI_STATUS(status);
}
- tables = ACPI_ALLOCATE_ZEROED(((acpi_size) table_count +
- ACPI_ROOT_TABLE_SIZE_INCREMENT) *
- sizeof(struct acpi_table_desc));
- if (!tables) {
- ACPI_ERROR((AE_INFO,
- "Could not allocate new root table array"));
- return_ACPI_STATUS(AE_NO_MEMORY);
+ /*
+ * Optionally do not load any SSDTs from the RSDT/XSDT. This can
+ * be useful for debugging ACPI problems on some machines.
+ */
+ if (!reload &&
+ acpi_gbl_disable_ssdt_table_install &&
+ ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) {
+ ACPI_INFO((AE_INFO, "Ignoring installation of %4.4s at %p",
+ new_table_desc.signature.ascii, ACPI_CAST_PTR(void,
+ address)));
+ goto release_and_exit;
}
- /* Copy and free the previous table array */
-
- if (acpi_gbl_root_table_list.tables) {
- ACPI_MEMCPY(tables, acpi_gbl_root_table_list.tables,
- (acpi_size) table_count *
- sizeof(struct acpi_table_desc));
+ /* Validate and verify a table before installation */
- if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
- ACPI_FREE(acpi_gbl_root_table_list.tables);
- }
+ status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
+ if (ACPI_FAILURE(status)) {
+ goto release_and_exit;
}
- acpi_gbl_root_table_list.tables = tables;
- acpi_gbl_root_table_list.max_table_count =
- table_count + ACPI_ROOT_TABLE_SIZE_INCREMENT;
- acpi_gbl_root_table_list.flags |= ACPI_ROOT_ORIGIN_ALLOCATED;
-
- return_ACPI_STATUS(AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_store_table
- *
- * PARAMETERS: address - Table address
- * table - Table header
- * length - Table length
- * flags - flags
- *
- * RETURN: Status and table index.
- *
- * DESCRIPTION: Add an ACPI table to the global table list
- *
- ******************************************************************************/
+ if (reload) {
+ /*
+ * Validate the incoming table signature.
+ *
+ * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
+ * 2) We added support for OEMx tables, signature "OEM".
+ * 3) Valid tables were encountered with a null signature, so we just
+ * gave up on validating the signature, (05/2008).
+ * 4) We encountered non-AML tables such as the MADT, which caused
+ * interpreter errors and kernel faults. So now, we once again allow
+ * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
+ */
+ if ((new_table_desc.signature.ascii[0] != 0x00) &&
+ (!ACPI_COMPARE_NAME
+ (&new_table_desc.signature, ACPI_SIG_SSDT))
+ && (ACPI_STRNCMP(new_table_desc.signature.ascii, "OEM", 3)))
+ {
+ ACPI_BIOS_ERROR((AE_INFO,
+ "Table has invalid signature [%4.4s] (0x%8.8X), "
+ "must be SSDT or OEMx",
+ acpi_ut_valid_acpi_name(new_table_desc.
+ signature.
+ ascii) ?
+ new_table_desc.signature.
+ ascii : "????",
+ new_table_desc.signature.integer));
+
+ status = AE_BAD_SIGNATURE;
+ goto release_and_exit;
+ }
-acpi_status
-acpi_tb_store_table(acpi_physical_address address,
- struct acpi_table_header *table,
- u32 length, u8 flags, u32 *table_index)
-{
- acpi_status status;
- struct acpi_table_desc *new_table;
+ /* Check if table is already registered */
- /* Ensure that there is room for the table in the Root Table List */
+ for (i = 0; i < acpi_gbl_root_table_list.current_table_count;
+ ++i) {
+ /*
+ * Check for a table match on the entire table length,
+ * not just the header.
+ */
+ if (!acpi_tb_compare_tables(&new_table_desc, i)) {
+ continue;
+ }
- if (acpi_gbl_root_table_list.current_table_count >=
- acpi_gbl_root_table_list.max_table_count) {
- status = acpi_tb_resize_root_table_list();
- if (ACPI_FAILURE(status)) {
- return (status);
+ /*
+ * Note: the current mechanism does not unregister a table if it is
+ * dynamically unloaded. The related namespace entries are deleted,
+ * but the table remains in the root table list.
+ *
+ * The assumption here is that the number of different tables that
+ * will be loaded is actually small, and there is minimal overhead
+ * in just keeping the table in case it is needed again.
+ *
+ * If this assumption changes in the future (perhaps on large
+ * machines with many table load/unload operations), tables will
+ * need to be unregistered when they are unloaded, and slots in the
+ * root table list should be reused when empty.
+ */
+ if (acpi_gbl_root_table_list.tables[i].
+ flags & ACPI_TABLE_IS_LOADED) {
+
+ /* Table is still loaded, this is an error */
+
+ status = AE_ALREADY_EXISTS;
+ goto release_and_exit;
+ } else {
+ /*
+ * Table was unloaded, allow it to be reloaded.
+ * As we are going to return AE_OK to the caller, we should
+ * take the responsibility of freeing the input descriptor.
+ * Refill the input descriptor to ensure
+ * acpi_tb_install_table_with_override() can be called again to
+ * indicate the re-installation.
+ */
+ acpi_tb_uninstall_table(&new_table_desc);
+ *table_index = i;
+ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ return_ACPI_STATUS(AE_OK);
+ }
}
}
- new_table =
- &acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.
- current_table_count];
-
- /* Initialize added table */
-
- new_table->address = address;
- new_table->pointer = table;
- new_table->length = length;
- new_table->owner_id = 0;
- new_table->flags = flags;
-
- ACPI_MOVE_32_TO_32(&new_table->signature, table->signature);
-
- *table_index = acpi_gbl_root_table_list.current_table_count;
- acpi_gbl_root_table_list.current_table_count++;
- return (AE_OK);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_delete_table
- *
- * PARAMETERS: table_index - Table index
- *
- * RETURN: None
- *
- * DESCRIPTION: Delete one internal ACPI table
- *
- ******************************************************************************/
+ /* Add the table to the global root table list */
-void acpi_tb_delete_table(struct acpi_table_desc *table_desc)
-{
- /* Table must be mapped or allocated */
- if (!table_desc->pointer) {
- return;
+ status = acpi_tb_get_next_root_index(&i);
+ if (ACPI_FAILURE(status)) {
+ goto release_and_exit;
}
- switch (table_desc->flags & ACPI_TABLE_ORIGIN_MASK) {
- case ACPI_TABLE_ORIGIN_MAPPED:
-
- acpi_os_unmap_memory(table_desc->pointer, table_desc->length);
- break;
-
- case ACPI_TABLE_ORIGIN_ALLOCATED:
- ACPI_FREE(table_desc->pointer);
- break;
+ *table_index = i;
+ acpi_tb_install_table_with_override(i, &new_table_desc, override);
- /* Not mapped or allocated, there is nothing we can do */
+release_and_exit:
- default:
+ /* Release the temporary table descriptor */
- return;
- }
-
- table_desc->pointer = NULL;
+ acpi_tb_release_temp_table(&new_table_desc);
+ return_ACPI_STATUS(status);
}
/*******************************************************************************
*
- * FUNCTION: acpi_tb_terminate
+ * FUNCTION: acpi_tb_override_table
*
- * PARAMETERS: None
+ * PARAMETERS: old_table_desc - Validated table descriptor to be
+ * overridden
*
* RETURN: None
*
- * DESCRIPTION: Delete all internal ACPI tables
+ * DESCRIPTION: Attempt table override by calling the OSL override functions.
+ * Note: If the table is overridden, then the entire new table
+ * is acquired and returned by this function.
+ * Before/after invocation, the table descriptor is in a state
+ * that is "VALIDATED".
*
******************************************************************************/
-void acpi_tb_terminate(void)
+void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
{
- u32 i;
-
- ACPI_FUNCTION_TRACE(tb_terminate);
-
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
-
- /* Delete the individual tables */
+ acpi_status status;
+ char *override_type;
+ struct acpi_table_desc new_table_desc;
+ struct acpi_table_header *table;
+ acpi_physical_address address;
+ u32 length;
- for (i = 0; i < acpi_gbl_root_table_list.current_table_count; i++) {
- acpi_tb_delete_table(&acpi_gbl_root_table_list.tables[i]);
- }
+ /* (1) Attempt logical override (returns a logical address) */
- /*
- * Delete the root table array if allocated locally. Array cannot be
- * mapped, so we don't need to check for that flag.
- */
- if (acpi_gbl_root_table_list.flags & ACPI_ROOT_ORIGIN_ALLOCATED) {
- ACPI_FREE(acpi_gbl_root_table_list.tables);
+ status = acpi_os_table_override(old_table_desc->pointer, &table);
+ if (ACPI_SUCCESS(status) && table) {
+ acpi_tb_acquire_temp_table(&new_table_desc,
+ ACPI_PTR_TO_PHYSADDR(table),
+ ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
+ override_type = "Logical";
+ goto finish_override;
}
- acpi_gbl_root_table_list.tables = NULL;
- acpi_gbl_root_table_list.flags = 0;
- acpi_gbl_root_table_list.current_table_count = 0;
+ /* (2) Attempt physical override (returns a physical address) */
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "ACPI Tables freed\n"));
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ status = acpi_os_physical_table_override(old_table_desc->pointer,
+ &address, &length);
+ if (ACPI_SUCCESS(status) && address && length) {
+ acpi_tb_acquire_temp_table(&new_table_desc, address,
+ ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
+ override_type = "Physical";
+ goto finish_override;
+ }
- return_VOID;
-}
+ return; /* There was no override */
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_delete_namespace_by_owner
- *
- * PARAMETERS: table_index - Table index
- *
- * RETURN: Status
- *
- * DESCRIPTION: Delete all namespace objects created when this table was loaded.
- *
- ******************************************************************************/
-
-acpi_status acpi_tb_delete_namespace_by_owner(u32 table_index)
-{
- acpi_owner_id owner_id;
- acpi_status status;
+finish_override:
- ACPI_FUNCTION_TRACE(tb_delete_namespace_by_owner);
+ /* Validate and verify a table before overriding */
- status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+ status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
+ return;
}
- if (table_index >= acpi_gbl_root_table_list.current_table_count) {
-
- /* The table index does not exist */
-
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- return_ACPI_STATUS(AE_NOT_EXIST);
- }
+ ACPI_INFO((AE_INFO, "%4.4s " ACPI_PRINTF_UINT
+ " %s table override, new table: " ACPI_PRINTF_UINT,
+ old_table_desc->signature.ascii,
+ ACPI_FORMAT_TO_UINT(old_table_desc->address),
+ override_type, ACPI_FORMAT_TO_UINT(new_table_desc.address)));
- /* Get the owner ID for this table, used to delete namespace nodes */
+ /* We can now uninstall the original table */
- owner_id = acpi_gbl_root_table_list.tables[table_index].owner_id;
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ acpi_tb_uninstall_table(old_table_desc);
/*
- * Need to acquire the namespace writer lock to prevent interference
- * with any concurrent namespace walks. The interpreter must be
- * released during the deletion since the acquisition of the deletion
- * lock may block, and also since the execution of a namespace walk
- * must be allowed to use the interpreter.
+ * Replace the original table descriptor and keep its state as
+ * "VALIDATED".
*/
- (void)acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
- status = acpi_ut_acquire_write_lock(&acpi_gbl_namespace_rw_lock);
+ acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
+ new_table_desc.flags,
+ new_table_desc.pointer);
+ acpi_tb_validate_temp_table(old_table_desc);
- acpi_ns_delete_namespace_by_owner(owner_id);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ /* Release the temporary table descriptor */
- acpi_ut_release_write_lock(&acpi_gbl_namespace_rw_lock);
-
- status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
- return_ACPI_STATUS(status);
+ acpi_tb_release_temp_table(&new_table_desc);
}
/*******************************************************************************
*
- * FUNCTION: acpi_tb_allocate_owner_id
+ * FUNCTION: acpi_tb_store_table
*
- * PARAMETERS: table_index - Table index
+ * PARAMETERS: address - Table address
+ * table - Table header
+ * length - Table length
+ * flags - Install flags
+ * table_index - Where the table index is returned
*
- * RETURN: Status
+ * RETURN: Status and table index.
*
- * DESCRIPTION: Allocates owner_id in table_desc
+ * DESCRIPTION: Add an ACPI table to the global table list
*
******************************************************************************/
-acpi_status acpi_tb_allocate_owner_id(u32 table_index)
+acpi_status
+acpi_tb_store_table(acpi_physical_address address,
+ struct acpi_table_header * table,
+ u32 length, u8 flags, u32 *table_index)
{
- acpi_status status = AE_BAD_PARAMETER;
-
- ACPI_FUNCTION_TRACE(tb_allocate_owner_id);
+ acpi_status status;
+ struct acpi_table_desc *table_desc;
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
- if (table_index < acpi_gbl_root_table_list.current_table_count) {
- status = acpi_ut_allocate_owner_id
- (&(acpi_gbl_root_table_list.tables[table_index].owner_id));
+ status = acpi_tb_get_next_root_index(table_index);
+ if (ACPI_FAILURE(status)) {
+ return (status);
}
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_release_owner_id
- *
- * PARAMETERS: table_index - Table index
- *
- * RETURN: Status
- *
- * DESCRIPTION: Releases owner_id in table_desc
- *
- ******************************************************************************/
-
-acpi_status acpi_tb_release_owner_id(u32 table_index)
-{
- acpi_status status = AE_BAD_PARAMETER;
-
- ACPI_FUNCTION_TRACE(tb_release_owner_id);
-
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
- if (table_index < acpi_gbl_root_table_list.current_table_count) {
- acpi_ut_release_owner_id(&
- (acpi_gbl_root_table_list.
- tables[table_index].owner_id));
- status = AE_OK;
- }
+ /* Initialize added table */
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- return_ACPI_STATUS(status);
+ table_desc = &acpi_gbl_root_table_list.tables[*table_index];
+ acpi_tb_init_table_descriptor(table_desc, address, flags, table);
+ table_desc->pointer = table;
+ return (AE_OK);
}
/*******************************************************************************
*
- * FUNCTION: acpi_tb_get_owner_id
+ * FUNCTION: acpi_tb_uninstall_table
*
- * PARAMETERS: table_index - Table index
- * owner_id - Where the table owner_id is returned
+ * PARAMETERS: table_desc - Table descriptor
*
- * RETURN: Status
+ * RETURN: None
*
- * DESCRIPTION: returns owner_id for the ACPI table
+ * DESCRIPTION: Delete one internal ACPI table
*
******************************************************************************/
-acpi_status acpi_tb_get_owner_id(u32 table_index, acpi_owner_id *owner_id)
+void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
{
- acpi_status status = AE_BAD_PARAMETER;
-
- ACPI_FUNCTION_TRACE(tb_get_owner_id);
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
- if (table_index < acpi_gbl_root_table_list.current_table_count) {
- *owner_id =
- acpi_gbl_root_table_list.tables[table_index].owner_id;
- status = AE_OK;
- }
+ ACPI_FUNCTION_TRACE(tb_uninstall_table);
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_is_table_loaded
- *
- * PARAMETERS: table_index - Table index
- *
- * RETURN: Table Loaded Flag
- *
- ******************************************************************************/
+ /* Table must be installed */
-u8 acpi_tb_is_table_loaded(u32 table_index)
-{
- u8 is_loaded = FALSE;
-
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
- if (table_index < acpi_gbl_root_table_list.current_table_count) {
- is_loaded = (u8)
- (acpi_gbl_root_table_list.tables[table_index].flags &
- ACPI_TABLE_IS_LOADED);
+ if (!table_desc->address) {
+ return_VOID;
}
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
- return (is_loaded);
-}
-
-/*******************************************************************************
- *
- * FUNCTION: acpi_tb_set_table_loaded_flag
- *
- * PARAMETERS: table_index - Table index
- * is_loaded - TRUE if table is loaded, FALSE otherwise
- *
- * RETURN: None
- *
- * DESCRIPTION: Sets the table loaded flag to either TRUE or FALSE.
- *
- ******************************************************************************/
-
-void acpi_tb_set_table_loaded_flag(u32 table_index, u8 is_loaded)
-{
+ acpi_tb_invalidate_table(table_desc);
- (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
- if (table_index < acpi_gbl_root_table_list.current_table_count) {
- if (is_loaded) {
- acpi_gbl_root_table_list.tables[table_index].flags |=
- ACPI_TABLE_IS_LOADED;
- } else {
- acpi_gbl_root_table_list.tables[table_index].flags &=
- ~ACPI_TABLE_IS_LOADED;
- }
+ if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
+ ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
+ ACPI_FREE(ACPI_CAST_PTR(void, table_desc->address));
}
- (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
+ table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
+ return_VOID;
}