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path: root/drivers/acpi/tables
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-rw-r--r--drivers/acpi/tables/tbconvrt.c8
-rw-r--r--drivers/acpi/tables/tbinstal.c34
-rw-r--r--drivers/acpi/tables/tbrsdt.c59
-rw-r--r--drivers/acpi/tables/tbutils.c67
-rw-r--r--drivers/acpi/tables/tbxface.c17
-rw-r--r--drivers/acpi/tables/tbxfroot.c120
6 files changed, 202 insertions, 103 deletions
diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c
index 92e0c31539b..d4ff71f5fe5 100644
--- a/drivers/acpi/tables/tbconvrt.c
+++ b/drivers/acpi/tables/tbconvrt.c
@@ -97,7 +97,9 @@ acpi_tb_get_table_count (
ACPI_FUNCTION_ENTRY ();
- if (RSDP->revision < 2) {
+ /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */
+
+ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
pointer_size = sizeof (u32);
}
else {
@@ -158,7 +160,9 @@ acpi_tb_convert_to_xsdt (
/* Copy the table pointers */
for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
- if (acpi_gbl_RSDP->revision < 2) {
+ /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */
+
+ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
ACPI_STORE_ADDRESS (new_table->table_offset_entry[i],
(ACPI_CAST_PTR (struct rsdt_descriptor_rev1,
table_info->pointer))->table_offset_entry[i]);
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
index 629b64c8193..698799901f5 100644
--- a/drivers/acpi/tables/tbinstal.c
+++ b/drivers/acpi/tables/tbinstal.c
@@ -124,9 +124,7 @@ acpi_tb_match_signature (
*
* RETURN: Status
*
- * DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must
- * already be loaded and validated.
- * Install the table into the global data structs.
+ * DESCRIPTION: Install the table into the global data structures.
*
******************************************************************************/
@@ -136,6 +134,7 @@ acpi_tb_install_table (
{
acpi_status status;
+
ACPI_FUNCTION_TRACE ("tb_install_table");
@@ -143,22 +142,33 @@ acpi_tb_install_table (
status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (status)) {
- ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n",
- table_info->pointer->signature, acpi_format_exception (status)));
+ ACPI_REPORT_ERROR (("Could not acquire table mutex, %s\n",
+ acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
+ /*
+ * Ignore a table that is already installed. For example, some BIOS
+ * ASL code will repeatedly attempt to load the same SSDT.
+ */
+ status = acpi_tb_is_table_installed (table_info);
+ if (ACPI_FAILURE (status)) {
+ goto unlock_and_exit;
+ }
+
/* Install the table into the global data structure */
status = acpi_tb_init_table_descriptor (table_info->type, table_info);
if (ACPI_FAILURE (status)) {
- ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n",
+ ACPI_REPORT_ERROR (("Could not install table [%4.4s], %s\n",
table_info->pointer->signature, acpi_format_exception (status)));
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n",
acpi_gbl_table_data[table_info->type].name, table_info->pointer));
+
+unlock_and_exit:
(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (status);
}
@@ -251,6 +261,7 @@ acpi_tb_init_table_descriptor (
{
struct acpi_table_list *list_head;
struct acpi_table_desc *table_desc;
+ acpi_status status;
ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type);
@@ -263,6 +274,13 @@ acpi_tb_init_table_descriptor (
return_ACPI_STATUS (AE_NO_MEMORY);
}
+ /* Get a new owner ID for the table */
+
+ status = acpi_ut_allocate_owner_id (&table_desc->owner_id);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
/* Install the table into the global data structure */
list_head = &acpi_gbl_table_lists[table_type];
@@ -325,8 +343,6 @@ acpi_tb_init_table_descriptor (
table_desc->aml_start = (u8 *) (table_desc->pointer + 1),
table_desc->aml_length = (u32) (table_desc->length -
(u32) sizeof (struct acpi_table_header));
- table_desc->table_id = acpi_ut_allocate_owner_id (
- ACPI_OWNER_TYPE_TABLE);
table_desc->loaded_into_namespace = FALSE;
/*
@@ -339,7 +355,7 @@ acpi_tb_init_table_descriptor (
/* Return Data */
- table_info->table_id = table_desc->table_id;
+ table_info->owner_id = table_desc->owner_id;
table_info->installed_desc = table_desc;
return_ACPI_STATUS (AE_OK);
diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c
index b7ffe39c362..069d498465d 100644
--- a/drivers/acpi/tables/tbrsdt.c
+++ b/drivers/acpi/tables/tbrsdt.c
@@ -96,32 +96,13 @@ acpi_tb_verify_rsdp (
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
- /*
- * The signature and checksum must both be correct
- */
- if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
- /* Nope, BAD Signature */
-
- status = AE_BAD_SIGNATURE;
- goto cleanup;
- }
-
- /* Check the standard checksum */
+ /* Verify RSDP signature and checksum */
- if (acpi_tb_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
- status = AE_BAD_CHECKSUM;
+ status = acpi_tb_validate_rsdp (rsdp);
+ if (ACPI_FAILURE (status)) {
goto cleanup;
}
- /* Check extended checksum if table version >= 2 */
-
- if (rsdp->revision >= 2) {
- if (acpi_tb_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0) {
- status = AE_BAD_CHECKSUM;
- goto cleanup;
- }
- }
-
/* The RSDP supplied is OK */
table_info.pointer = ACPI_CAST_PTR (struct acpi_table_header, rsdp);
@@ -159,8 +140,8 @@ cleanup:
*
* RETURN: None, Address
*
- * DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
- * version of the RSDP
+ * DESCRIPTION: Extract the address of either the RSDT or XSDT, depending on the
+ * version of the RSDP and whether the XSDT pointer is valid
*
******************************************************************************/
@@ -174,16 +155,19 @@ acpi_tb_get_rsdt_address (
out_address->pointer_type = acpi_gbl_table_flags | ACPI_LOGICAL_ADDRESSING;
- /*
- * For RSDP revision 0 or 1, we use the RSDT.
- * For RSDP revision 2 (and above), we use the XSDT
- */
- if (acpi_gbl_RSDP->revision < 2) {
- out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address;
- }
- else {
+ /* Use XSDT if it is present */
+
+ if ((acpi_gbl_RSDP->revision >= 2) &&
+ acpi_gbl_RSDP->xsdt_physical_address) {
out_address->pointer.value =
acpi_gbl_RSDP->xsdt_physical_address;
+ acpi_gbl_root_table_type = ACPI_TABLE_TYPE_XSDT;
+ }
+ else {
+ /* No XSDT, use the RSDT */
+
+ out_address->pointer.value = acpi_gbl_RSDP->rsdt_physical_address;
+ acpi_gbl_root_table_type = ACPI_TABLE_TYPE_RSDT;
}
}
@@ -211,10 +195,9 @@ acpi_tb_validate_rsdt (
/*
- * For RSDP revision 0 or 1, we use the RSDT.
- * For RSDP revision 2 and above, we use the XSDT
+ * Search for appropriate signature, RSDT or XSDT
*/
- if (acpi_gbl_RSDP->revision < 2) {
+ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
no_match = ACPI_STRNCMP ((char *) table_ptr, RSDT_SIG,
sizeof (RSDT_SIG) -1);
}
@@ -236,11 +219,11 @@ acpi_tb_validate_rsdt (
acpi_gbl_RSDP->rsdt_physical_address,
(void *) (acpi_native_uint) acpi_gbl_RSDP->rsdt_physical_address));
- if (acpi_gbl_RSDP->revision < 2) {
- ACPI_REPORT_ERROR (("Looking for RSDT (RSDP->Rev < 2)\n"))
+ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
+ ACPI_REPORT_ERROR (("Looking for RSDT\n"))
}
else {
- ACPI_REPORT_ERROR (("Looking for XSDT (RSDP->Rev >= 2)\n"))
+ ACPI_REPORT_ERROR (("Looking for XSDT\n"))
}
ACPI_DUMP_BUFFER ((char *) table_ptr, 48);
diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c
index e69d01d443d..6fc1e36e604 100644
--- a/drivers/acpi/tables/tbutils.c
+++ b/drivers/acpi/tables/tbutils.c
@@ -61,6 +61,67 @@ acpi_tb_handle_to_object (
/*******************************************************************************
*
+ * FUNCTION: acpi_tb_is_table_installed
+ *
+ * PARAMETERS: new_table_desc - Descriptor for new table being installed
+ *
+ * RETURN: Status - AE_ALREADY_EXISTS if the table is already installed
+ *
+ * DESCRIPTION: Determine if an ACPI table is already installed
+ *
+ * MUTEX: Table data structures should be locked
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_is_table_installed (
+ struct acpi_table_desc *new_table_desc)
+{
+ struct acpi_table_desc *table_desc;
+
+
+ ACPI_FUNCTION_TRACE ("tb_is_table_installed");
+
+
+ /* Get the list descriptor and first table descriptor */
+
+ table_desc = acpi_gbl_table_lists[new_table_desc->type].next;
+
+ /* Examine all installed tables of this type */
+
+ while (table_desc) {
+ /* Compare Revision and oem_table_id */
+
+ if ((table_desc->loaded_into_namespace) &&
+ (table_desc->pointer->revision ==
+ new_table_desc->pointer->revision) &&
+ (!ACPI_MEMCMP (table_desc->pointer->oem_table_id,
+ new_table_desc->pointer->oem_table_id, 8))) {
+ /* This table is already installed */
+
+ ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
+ "Table [%4.4s] already installed: Rev %X oem_table_id [%8.8s]\n",
+ new_table_desc->pointer->signature,
+ new_table_desc->pointer->revision,
+ new_table_desc->pointer->oem_table_id));
+
+ new_table_desc->owner_id = table_desc->owner_id;
+ new_table_desc->installed_desc = table_desc;
+
+ return_ACPI_STATUS (AE_ALREADY_EXISTS);
+ }
+
+ /* Get next table on the list */
+
+ table_desc = table_desc->next;
+ }
+
+ return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_tb_validate_table_header
*
* PARAMETERS: table_header - Logical pointer to the table
@@ -157,7 +218,7 @@ acpi_tb_verify_table_checksum (
/* Compute the checksum on the table */
- checksum = acpi_tb_checksum (table_header, table_header->length);
+ checksum = acpi_tb_generate_checksum (table_header, table_header->length);
/* Return the appropriate exception */
@@ -175,7 +236,7 @@ acpi_tb_verify_table_checksum (
/*******************************************************************************
*
- * FUNCTION: acpi_tb_checksum
+ * FUNCTION: acpi_tb_generate_checksum
*
* PARAMETERS: Buffer - Buffer to checksum
* Length - Size of the buffer
@@ -187,7 +248,7 @@ acpi_tb_verify_table_checksum (
******************************************************************************/
u8
-acpi_tb_checksum (
+acpi_tb_generate_checksum (
void *buffer,
u32 length)
{
diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
index 0c0b9085dbe..e18a05d1b9b 100644
--- a/drivers/acpi/tables/tbxface.c
+++ b/drivers/acpi/tables/tbxface.c
@@ -182,10 +182,23 @@ acpi_load_table (
return_ACPI_STATUS (status);
}
+ /* Check signature for a valid table type */
+
+ status = acpi_tb_recognize_table (&table_info, ACPI_TABLE_ALL);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
/* Install the new table into the local data structures */
status = acpi_tb_install_table (&table_info);
if (ACPI_FAILURE (status)) {
+ if (status == AE_ALREADY_EXISTS) {
+ /* Table already exists, no error */
+
+ status = AE_OK;
+ }
+
/* Free table allocated by acpi_tb_get_table_body */
acpi_tb_delete_single_table (&table_info);
@@ -260,8 +273,8 @@ acpi_unload_table (
* "Scope" operator. Thus, we need to track ownership by an ID, not
* simply a position within the hierarchy
*/
- acpi_ns_delete_namespace_by_owner (table_desc->table_id);
-
+ acpi_ns_delete_namespace_by_owner (table_desc->owner_id);
+ acpi_ut_release_owner_id (&table_desc->owner_id);
table_desc = table_desc->next;
}
diff --git a/drivers/acpi/tables/tbxfroot.c b/drivers/acpi/tables/tbxfroot.c
index dc3c3f6a9f6..87dccdda9ae 100644
--- a/drivers/acpi/tables/tbxfroot.c
+++ b/drivers/acpi/tables/tbxfroot.c
@@ -65,6 +65,51 @@ acpi_tb_scan_memory_for_rsdp (
/*******************************************************************************
*
+ * FUNCTION: acpi_tb_validate_rsdp
+ *
+ * PARAMETERS: Rsdp - Pointer to unvalidated RSDP
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Validate the RSDP (ptr)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_validate_rsdp (
+ struct rsdp_descriptor *rsdp)
+{
+ ACPI_FUNCTION_ENTRY ();
+
+
+ /*
+ * The signature and checksum must both be correct
+ */
+ if (ACPI_STRNCMP ((char *) rsdp, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0) {
+ /* Nope, BAD Signature */
+
+ return (AE_BAD_SIGNATURE);
+ }
+
+ /* Check the standard checksum */
+
+ if (acpi_tb_generate_checksum (rsdp, ACPI_RSDP_CHECKSUM_LENGTH) != 0) {
+ return (AE_BAD_CHECKSUM);
+ }
+
+ /* Check extended checksum if table version >= 2 */
+
+ if ((rsdp->revision >= 2) &&
+ (acpi_tb_generate_checksum (rsdp, ACPI_RSDP_XCHECKSUM_LENGTH) != 0)) {
+ return (AE_BAD_CHECKSUM);
+ }
+
+ return (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_tb_find_table
*
* PARAMETERS: Signature - String with ACPI table signature
@@ -218,19 +263,11 @@ acpi_get_firmware_table (
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 */
+ /* The RDSP signature and checksum must both be correct */
- return_ACPI_STATUS (AE_BAD_CHECKSUM);
+ status = acpi_tb_validate_rsdp (acpi_gbl_RSDP);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
}
}
@@ -287,9 +324,11 @@ acpi_get_firmware_table (
* 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) {
+ /*
+ * Get the next table pointer, handle RSDT vs. XSDT
+ * RSDT pointers are 32 bits, XSDT pointers are 64 bits
+ */
+ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
address.pointer.value = (ACPI_CAST_PTR (
RSDT_DESCRIPTOR, rsdt_info->pointer))->table_offset_entry[i];
}
@@ -331,8 +370,10 @@ acpi_get_firmware_table (
cleanup:
- acpi_os_unmap_memory (rsdt_info->pointer,
- (acpi_size) rsdt_info->pointer->length);
+ if (rsdt_info->pointer) {
+ acpi_os_unmap_memory (rsdt_info->pointer,
+ (acpi_size) rsdt_info->pointer->length);
+ }
ACPI_MEM_FREE (rsdt_info);
if (header) {
@@ -410,9 +451,9 @@ acpi_tb_scan_memory_for_rsdp (
u8 *start_address,
u32 length)
{
+ acpi_status status;
u8 *mem_rover;
u8 *end_address;
- u8 checksum;
ACPI_FUNCTION_TRACE ("tb_scan_memory_for_rsdp");
@@ -424,45 +465,25 @@ acpi_tb_scan_memory_for_rsdp (
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 */
+ /* The RSDP signature and checksum must both be correct */
- 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 */
+ status = acpi_tb_validate_rsdp (ACPI_CAST_PTR (struct rsdp_descriptor, mem_rover));
+ if (ACPI_SUCCESS (status)) {
+ /* Sig and checksum valid, we have found a real 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));
+ /* No sig match or bad checksum, keep searching */
}
/* Searched entire block, no RSDP was found */
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
- "Searched entire block, no valid RSDP was found.\n"));
+ "Searched entire block from %p, valid RSDP was not found\n",
+ start_address));
return_PTR (NULL);
}
@@ -550,7 +571,7 @@ acpi_tb_find_rsdp (
acpi_os_unmap_memory (table_ptr, ACPI_EBDA_WINDOW_SIZE);
if (mem_rover) {
- /* Found it, return the physical address */
+ /* Return the physical address */
physical_address += ACPI_PTR_DIFF (mem_rover, table_ptr);
@@ -579,7 +600,7 @@ acpi_tb_find_rsdp (
acpi_os_unmap_memory (table_ptr, ACPI_HI_RSDP_WINDOW_SIZE);
if (mem_rover) {
- /* Found it, return the physical address */
+ /* Return the physical address */
physical_address =
ACPI_HI_RSDP_WINDOW_BASE + ACPI_PTR_DIFF (mem_rover, table_ptr);
@@ -610,7 +631,7 @@ acpi_tb_find_rsdp (
ACPI_PHYSADDR_TO_PTR (physical_address),
ACPI_EBDA_WINDOW_SIZE);
if (mem_rover) {
- /* Found it, return the physical address */
+ /* Return the physical address */
table_info->physical_address = ACPI_TO_INTEGER (mem_rover);
return_ACPI_STATUS (AE_OK);
@@ -630,8 +651,9 @@ acpi_tb_find_rsdp (
}
}
- /* RSDP signature was not found */
+ /* A valid RSDP was not found */
+ ACPI_REPORT_ERROR (("No valid RSDP was found\n"));
return_ACPI_STATUS (AE_NOT_FOUND);
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-19 21:13:18 +0000