| /****************************************************************************** |
| * |
| * Module Name: oslinuxtbl - Linux OSL for obtaining ACPI tables |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2017, Intel Corp. |
| * 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 "acpidump.h" |
| |
| #define _COMPONENT ACPI_OS_SERVICES |
| ACPI_MODULE_NAME("oslinuxtbl") |
| |
| #ifndef PATH_MAX |
| #define PATH_MAX 256 |
| #endif |
| /* List of information about obtained ACPI tables */ |
| typedef struct osl_table_info { |
| struct osl_table_info *next; |
| u32 instance; |
| char signature[ACPI_NAME_SIZE]; |
| |
| } osl_table_info; |
| |
| /* Local prototypes */ |
| |
| static acpi_status osl_table_initialize(void); |
| |
| static acpi_status |
| osl_table_name_from_file(char *filename, char *signature, u32 *instance); |
| |
| static acpi_status osl_add_table_to_list(char *signature, u32 instance); |
| |
| static acpi_status |
| osl_read_table_from_file(char *filename, |
| acpi_size file_offset, |
| char *signature, struct acpi_table_header **table); |
| |
| static acpi_status |
| osl_map_table(acpi_size address, |
| char *signature, struct acpi_table_header **table); |
| |
| static void osl_unmap_table(struct acpi_table_header *table); |
| |
| static acpi_physical_address |
| osl_find_rsdp_via_efi_by_keyword(FILE * file, const char *keyword); |
| |
| static acpi_physical_address osl_find_rsdp_via_efi(void); |
| |
| static acpi_status osl_load_rsdp(void); |
| |
| static acpi_status osl_list_customized_tables(char *directory); |
| |
| static acpi_status |
| osl_get_customized_table(char *pathname, |
| char *signature, |
| u32 instance, |
| struct acpi_table_header **table, |
| acpi_physical_address *address); |
| |
| static acpi_status osl_list_bios_tables(void); |
| |
| static acpi_status |
| osl_get_bios_table(char *signature, |
| u32 instance, |
| struct acpi_table_header **table, |
| acpi_physical_address *address); |
| |
| static acpi_status osl_get_last_status(acpi_status default_status); |
| |
| /* File locations */ |
| |
| #define DYNAMIC_TABLE_DIR "/sys/firmware/acpi/tables/dynamic" |
| #define STATIC_TABLE_DIR "/sys/firmware/acpi/tables" |
| #define EFI_SYSTAB "/sys/firmware/efi/systab" |
| |
| /* Should we get dynamically loaded SSDTs from DYNAMIC_TABLE_DIR? */ |
| |
| u8 gbl_dump_dynamic_tables = TRUE; |
| |
| /* Initialization flags */ |
| |
| u8 gbl_table_list_initialized = FALSE; |
| |
| /* Local copies of main ACPI tables */ |
| |
| struct acpi_table_rsdp gbl_rsdp; |
| struct acpi_table_fadt *gbl_fadt = NULL; |
| struct acpi_table_rsdt *gbl_rsdt = NULL; |
| struct acpi_table_xsdt *gbl_xsdt = NULL; |
| |
| /* Table addresses */ |
| |
| acpi_physical_address gbl_fadt_address = 0; |
| acpi_physical_address gbl_rsdp_address = 0; |
| |
| /* Revision of RSD PTR */ |
| |
| u8 gbl_revision = 0; |
| |
| struct osl_table_info *gbl_table_list_head = NULL; |
| u32 gbl_table_count = 0; |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_get_last_status |
| * |
| * PARAMETERS: default_status - Default error status to return |
| * |
| * RETURN: Status; Converted from errno. |
| * |
| * DESCRIPTION: Get last errno and conver it to acpi_status. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status osl_get_last_status(acpi_status default_status) |
| { |
| |
| switch (errno) { |
| case EACCES: |
| case EPERM: |
| |
| return (AE_ACCESS); |
| |
| case ENOENT: |
| |
| return (AE_NOT_FOUND); |
| |
| case ENOMEM: |
| |
| return (AE_NO_MEMORY); |
| |
| default: |
| |
| return (default_status); |
| } |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_os_get_table_by_address |
| * |
| * PARAMETERS: address - Physical address of the ACPI table |
| * table - Where a pointer to the table is returned |
| * |
| * RETURN: Status; Table buffer is returned if AE_OK. |
| * AE_NOT_FOUND: A valid table was not found at the address |
| * |
| * DESCRIPTION: Get an ACPI table via a physical memory address. |
| * |
| *****************************************************************************/ |
| |
| acpi_status |
| acpi_os_get_table_by_address(acpi_physical_address address, |
| struct acpi_table_header **table) |
| { |
| u32 table_length; |
| struct acpi_table_header *mapped_table; |
| struct acpi_table_header *local_table = NULL; |
| acpi_status status = AE_OK; |
| |
| /* Get main ACPI tables from memory on first invocation of this function */ |
| |
| status = osl_table_initialize(); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Map the table and validate it */ |
| |
| status = osl_map_table(address, NULL, &mapped_table); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Copy table to local buffer and return it */ |
| |
| table_length = ap_get_table_length(mapped_table); |
| if (table_length == 0) { |
| status = AE_BAD_HEADER; |
| goto exit; |
| } |
| |
| local_table = calloc(1, table_length); |
| if (!local_table) { |
| status = AE_NO_MEMORY; |
| goto exit; |
| } |
| |
| memcpy(local_table, mapped_table, table_length); |
| |
| exit: |
| osl_unmap_table(mapped_table); |
| *table = local_table; |
| return (status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_os_get_table_by_name |
| * |
| * PARAMETERS: signature - ACPI Signature for desired table. Must be |
| * a null terminated 4-character string. |
| * instance - Multiple table support for SSDT/UEFI (0...n) |
| * Must be 0 for other tables. |
| * table - Where a pointer to the table is returned |
| * address - Where the table physical address is returned |
| * |
| * RETURN: Status; Table buffer and physical address returned if AE_OK. |
| * AE_LIMIT: Instance is beyond valid limit |
| * AE_NOT_FOUND: A table with the signature was not found |
| * |
| * NOTE: Assumes the input signature is uppercase. |
| * |
| *****************************************************************************/ |
| |
| acpi_status |
| acpi_os_get_table_by_name(char *signature, |
| u32 instance, |
| struct acpi_table_header **table, |
| acpi_physical_address *address) |
| { |
| acpi_status status; |
| |
| /* Get main ACPI tables from memory on first invocation of this function */ |
| |
| status = osl_table_initialize(); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Not a main ACPI table, attempt to extract it from the RSDT/XSDT */ |
| |
| if (!gbl_dump_customized_tables) { |
| |
| /* Attempt to get the table from the memory */ |
| |
| status = |
| osl_get_bios_table(signature, instance, table, address); |
| } else { |
| /* Attempt to get the table from the static directory */ |
| |
| status = osl_get_customized_table(STATIC_TABLE_DIR, signature, |
| instance, table, address); |
| } |
| |
| if (ACPI_FAILURE(status) && status == AE_LIMIT) { |
| if (gbl_dump_dynamic_tables) { |
| |
| /* Attempt to get a dynamic table */ |
| |
| status = |
| osl_get_customized_table(DYNAMIC_TABLE_DIR, |
| signature, instance, table, |
| address); |
| } |
| } |
| |
| return (status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_add_table_to_list |
| * |
| * PARAMETERS: signature - Table signature |
| * instance - Table instance |
| * |
| * RETURN: Status; Successfully added if AE_OK. |
| * AE_NO_MEMORY: Memory allocation error |
| * |
| * DESCRIPTION: Insert a table structure into OSL table list. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status osl_add_table_to_list(char *signature, u32 instance) |
| { |
| struct osl_table_info *new_info; |
| struct osl_table_info *next; |
| u32 next_instance = 0; |
| u8 found = FALSE; |
| |
| new_info = calloc(1, sizeof(struct osl_table_info)); |
| if (!new_info) { |
| return (AE_NO_MEMORY); |
| } |
| |
| ACPI_MOVE_NAME(new_info->signature, signature); |
| |
| if (!gbl_table_list_head) { |
| gbl_table_list_head = new_info; |
| } else { |
| next = gbl_table_list_head; |
| while (1) { |
| if (ACPI_COMPARE_NAME(next->signature, signature)) { |
| if (next->instance == instance) { |
| found = TRUE; |
| } |
| if (next->instance >= next_instance) { |
| next_instance = next->instance + 1; |
| } |
| } |
| |
| if (!next->next) { |
| break; |
| } |
| next = next->next; |
| } |
| next->next = new_info; |
| } |
| |
| if (found) { |
| if (instance) { |
| fprintf(stderr, |
| "%4.4s: Warning unmatched table instance %d, expected %d\n", |
| signature, instance, next_instance); |
| } |
| instance = next_instance; |
| } |
| |
| new_info->instance = instance; |
| gbl_table_count++; |
| |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_os_get_table_by_index |
| * |
| * PARAMETERS: index - Which table to get |
| * table - Where a pointer to the table is returned |
| * instance - Where a pointer to the table instance no. is |
| * returned |
| * address - Where the table physical address is returned |
| * |
| * RETURN: Status; Table buffer and physical address returned if AE_OK. |
| * AE_LIMIT: Index is beyond valid limit |
| * |
| * DESCRIPTION: Get an ACPI table via an index value (0 through n). Returns |
| * AE_LIMIT when an invalid index is reached. Index is not |
| * necessarily an index into the RSDT/XSDT. |
| * |
| *****************************************************************************/ |
| |
| acpi_status |
| acpi_os_get_table_by_index(u32 index, |
| struct acpi_table_header **table, |
| u32 *instance, acpi_physical_address *address) |
| { |
| struct osl_table_info *info; |
| acpi_status status; |
| u32 i; |
| |
| /* Get main ACPI tables from memory on first invocation of this function */ |
| |
| status = osl_table_initialize(); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Validate Index */ |
| |
| if (index >= gbl_table_count) { |
| return (AE_LIMIT); |
| } |
| |
| /* Point to the table list entry specified by the Index argument */ |
| |
| info = gbl_table_list_head; |
| for (i = 0; i < index; i++) { |
| info = info->next; |
| } |
| |
| /* Now we can just get the table via the signature */ |
| |
| status = acpi_os_get_table_by_name(info->signature, info->instance, |
| table, address); |
| |
| if (ACPI_SUCCESS(status)) { |
| *instance = info->instance; |
| } |
| return (status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_find_rsdp_via_efi_by_keyword |
| * |
| * PARAMETERS: keyword - Character string indicating ACPI GUID version |
| * in the EFI table |
| * |
| * RETURN: RSDP address if found |
| * |
| * DESCRIPTION: Find RSDP address via EFI using keyword indicating the ACPI |
| * GUID version. |
| * |
| *****************************************************************************/ |
| |
| static acpi_physical_address |
| osl_find_rsdp_via_efi_by_keyword(FILE * file, const char *keyword) |
| { |
| char buffer[80]; |
| unsigned long long address = 0; |
| char format[32]; |
| |
| snprintf(format, 32, "%s=%s", keyword, "%llx"); |
| fseek(file, 0, SEEK_SET); |
| while (fgets(buffer, 80, file)) { |
| if (sscanf(buffer, format, &address) == 1) { |
| break; |
| } |
| } |
| |
| return ((acpi_physical_address)(address)); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_find_rsdp_via_efi |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: RSDP address if found |
| * |
| * DESCRIPTION: Find RSDP address via EFI. |
| * |
| *****************************************************************************/ |
| |
| static acpi_physical_address osl_find_rsdp_via_efi(void) |
| { |
| FILE *file; |
| acpi_physical_address address = 0; |
| |
| file = fopen(EFI_SYSTAB, "r"); |
| if (file) { |
| address = osl_find_rsdp_via_efi_by_keyword(file, "ACPI20"); |
| if (!address) { |
| address = |
| osl_find_rsdp_via_efi_by_keyword(file, "ACPI"); |
| } |
| fclose(file); |
| } |
| |
| return (address); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_load_rsdp |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Scan and load RSDP. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status osl_load_rsdp(void) |
| { |
| struct acpi_table_header *mapped_table; |
| u8 *rsdp_address; |
| acpi_physical_address rsdp_base; |
| acpi_size rsdp_size; |
| |
| /* Get RSDP from memory */ |
| |
| rsdp_size = sizeof(struct acpi_table_rsdp); |
| if (gbl_rsdp_base) { |
| rsdp_base = gbl_rsdp_base; |
| } else { |
| rsdp_base = osl_find_rsdp_via_efi(); |
| } |
| |
| if (!rsdp_base) { |
| rsdp_base = ACPI_HI_RSDP_WINDOW_BASE; |
| rsdp_size = ACPI_HI_RSDP_WINDOW_SIZE; |
| } |
| |
| rsdp_address = acpi_os_map_memory(rsdp_base, rsdp_size); |
| if (!rsdp_address) { |
| return (osl_get_last_status(AE_BAD_ADDRESS)); |
| } |
| |
| /* Search low memory for the RSDP */ |
| |
| mapped_table = ACPI_CAST_PTR(struct acpi_table_header, |
| acpi_tb_scan_memory_for_rsdp(rsdp_address, |
| rsdp_size)); |
| if (!mapped_table) { |
| acpi_os_unmap_memory(rsdp_address, rsdp_size); |
| return (AE_NOT_FOUND); |
| } |
| |
| gbl_rsdp_address = |
| rsdp_base + (ACPI_CAST8(mapped_table) - rsdp_address); |
| |
| memcpy(&gbl_rsdp, mapped_table, sizeof(struct acpi_table_rsdp)); |
| acpi_os_unmap_memory(rsdp_address, rsdp_size); |
| |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_can_use_xsdt |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: TRUE if XSDT is allowed to be used. |
| * |
| * DESCRIPTION: This function collects logic that can be used to determine if |
| * XSDT should be used instead of RSDT. |
| * |
| *****************************************************************************/ |
| |
| static u8 osl_can_use_xsdt(void) |
| { |
| if (gbl_revision && !acpi_gbl_do_not_use_xsdt) { |
| return (TRUE); |
| } else { |
| return (FALSE); |
| } |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_table_initialize |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Initialize ACPI table data. Get and store main ACPI tables to |
| * local variables. Main ACPI tables include RSDT, FADT, RSDT, |
| * and/or XSDT. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status osl_table_initialize(void) |
| { |
| acpi_status status; |
| acpi_physical_address address; |
| |
| if (gbl_table_list_initialized) { |
| return (AE_OK); |
| } |
| |
| if (!gbl_dump_customized_tables) { |
| |
| /* Get RSDP from memory */ |
| |
| status = osl_load_rsdp(); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Get XSDT from memory */ |
| |
| if (gbl_rsdp.revision && !gbl_do_not_dump_xsdt) { |
| if (gbl_xsdt) { |
| free(gbl_xsdt); |
| gbl_xsdt = NULL; |
| } |
| |
| gbl_revision = 2; |
| status = osl_get_bios_table(ACPI_SIG_XSDT, 0, |
| ACPI_CAST_PTR(struct |
| acpi_table_header |
| *, &gbl_xsdt), |
| &address); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| } |
| |
| /* Get RSDT from memory */ |
| |
| if (gbl_rsdp.rsdt_physical_address) { |
| if (gbl_rsdt) { |
| free(gbl_rsdt); |
| gbl_rsdt = NULL; |
| } |
| |
| status = osl_get_bios_table(ACPI_SIG_RSDT, 0, |
| ACPI_CAST_PTR(struct |
| acpi_table_header |
| *, &gbl_rsdt), |
| &address); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| } |
| |
| /* Get FADT from memory */ |
| |
| if (gbl_fadt) { |
| free(gbl_fadt); |
| gbl_fadt = NULL; |
| } |
| |
| status = osl_get_bios_table(ACPI_SIG_FADT, 0, |
| ACPI_CAST_PTR(struct |
| acpi_table_header *, |
| &gbl_fadt), |
| &gbl_fadt_address); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Add mandatory tables to global table list first */ |
| |
| status = osl_add_table_to_list(ACPI_RSDP_NAME, 0); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| status = osl_add_table_to_list(ACPI_SIG_RSDT, 0); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| if (gbl_revision == 2) { |
| status = osl_add_table_to_list(ACPI_SIG_XSDT, 0); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| } |
| |
| status = osl_add_table_to_list(ACPI_SIG_DSDT, 0); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| status = osl_add_table_to_list(ACPI_SIG_FACS, 0); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| /* Add all tables found in the memory */ |
| |
| status = osl_list_bios_tables(); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| } else { |
| /* Add all tables found in the static directory */ |
| |
| status = osl_list_customized_tables(STATIC_TABLE_DIR); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| } |
| |
| if (gbl_dump_dynamic_tables) { |
| |
| /* Add all dynamically loaded tables in the dynamic directory */ |
| |
| status = osl_list_customized_tables(DYNAMIC_TABLE_DIR); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| } |
| |
| gbl_table_list_initialized = TRUE; |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_list_bios_tables |
| * |
| * PARAMETERS: None |
| * |
| * RETURN: Status; Table list is initialized if AE_OK. |
| * |
| * DESCRIPTION: Add ACPI tables to the table list from memory. |
| * |
| * NOTE: This works on Linux as table customization does not modify the |
| * addresses stored in RSDP/RSDT/XSDT/FADT. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status osl_list_bios_tables(void) |
| { |
| struct acpi_table_header *mapped_table = NULL; |
| u8 *table_data; |
| u8 number_of_tables; |
| u8 item_size; |
| acpi_physical_address table_address = 0; |
| acpi_status status = AE_OK; |
| u32 i; |
| |
| if (osl_can_use_xsdt()) { |
| item_size = sizeof(u64); |
| table_data = |
| ACPI_CAST8(gbl_xsdt) + sizeof(struct acpi_table_header); |
| number_of_tables = |
| (u8)((gbl_xsdt->header.length - |
| sizeof(struct acpi_table_header)) |
| / item_size); |
| } else { /* Use RSDT if XSDT is not available */ |
| |
| item_size = sizeof(u32); |
| table_data = |
| ACPI_CAST8(gbl_rsdt) + sizeof(struct acpi_table_header); |
| number_of_tables = |
| (u8)((gbl_rsdt->header.length - |
| sizeof(struct acpi_table_header)) |
| / item_size); |
| } |
| |
| /* Search RSDT/XSDT for the requested table */ |
| |
| for (i = 0; i < number_of_tables; ++i, table_data += item_size) { |
| if (osl_can_use_xsdt()) { |
| table_address = |
| (acpi_physical_address)(*ACPI_CAST64(table_data)); |
| } else { |
| table_address = |
| (acpi_physical_address)(*ACPI_CAST32(table_data)); |
| } |
| |
| /* Skip NULL entries in RSDT/XSDT */ |
| |
| if (table_address == 0) { |
| continue; |
| } |
| |
| status = osl_map_table(table_address, NULL, &mapped_table); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| osl_add_table_to_list(mapped_table->signature, 0); |
| osl_unmap_table(mapped_table); |
| } |
| |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_get_bios_table |
| * |
| * PARAMETERS: signature - ACPI Signature for common table. Must be |
| * a null terminated 4-character string. |
| * instance - Multiple table support for SSDT/UEFI (0...n) |
| * Must be 0 for other tables. |
| * table - Where a pointer to the table is returned |
| * address - Where the table physical address is returned |
| * |
| * RETURN: Status; Table buffer and physical address returned if AE_OK. |
| * AE_LIMIT: Instance is beyond valid limit |
| * AE_NOT_FOUND: A table with the signature was not found |
| * |
| * DESCRIPTION: Get a BIOS provided ACPI table |
| * |
| * NOTE: Assumes the input signature is uppercase. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status |
| osl_get_bios_table(char *signature, |
| u32 instance, |
| struct acpi_table_header **table, |
| acpi_physical_address *address) |
| { |
| struct acpi_table_header *local_table = NULL; |
| struct acpi_table_header *mapped_table = NULL; |
| u8 *table_data; |
| u8 number_of_tables; |
| u8 item_size; |
| u32 current_instance = 0; |
| acpi_physical_address table_address; |
| acpi_physical_address first_table_address = 0; |
| u32 table_length = 0; |
| acpi_status status = AE_OK; |
| u32 i; |
| |
| /* Handle special tables whose addresses are not in RSDT/XSDT */ |
| |
| if (ACPI_COMPARE_NAME(signature, ACPI_RSDP_NAME) || |
| ACPI_COMPARE_NAME(signature, ACPI_SIG_RSDT) || |
| ACPI_COMPARE_NAME(signature, ACPI_SIG_XSDT) || |
| ACPI_COMPARE_NAME(signature, ACPI_SIG_DSDT) || |
| ACPI_COMPARE_NAME(signature, ACPI_SIG_FACS)) { |
| |
| find_next_instance: |
| |
| table_address = 0; |
| |
| /* |
| * Get the appropriate address, either 32-bit or 64-bit. Be very |
| * careful about the FADT length and validate table addresses. |
| * Note: The 64-bit addresses have priority. |
| */ |
| if (ACPI_COMPARE_NAME(signature, ACPI_SIG_DSDT)) { |
| if (current_instance < 2) { |
| if ((gbl_fadt->header.length >= |
| MIN_FADT_FOR_XDSDT) && gbl_fadt->Xdsdt |
| && current_instance == 0) { |
| table_address = |
| (acpi_physical_address)gbl_fadt-> |
| Xdsdt; |
| } else |
| if ((gbl_fadt->header.length >= |
| MIN_FADT_FOR_DSDT) |
| && gbl_fadt->dsdt != |
| first_table_address) { |
| table_address = |
| (acpi_physical_address)gbl_fadt-> |
| dsdt; |
| } |
| } |
| } else if (ACPI_COMPARE_NAME(signature, ACPI_SIG_FACS)) { |
| if (current_instance < 2) { |
| if ((gbl_fadt->header.length >= |
| MIN_FADT_FOR_XFACS) && gbl_fadt->Xfacs |
| && current_instance == 0) { |
| table_address = |
| (acpi_physical_address)gbl_fadt-> |
| Xfacs; |
| } else |
| if ((gbl_fadt->header.length >= |
| MIN_FADT_FOR_FACS) |
| && gbl_fadt->facs != |
| first_table_address) { |
| table_address = |
| (acpi_physical_address)gbl_fadt-> |
| facs; |
| } |
| } |
| } else if (ACPI_COMPARE_NAME(signature, ACPI_SIG_XSDT)) { |
| if (!gbl_revision) { |
| return (AE_BAD_SIGNATURE); |
| } |
| if (current_instance == 0) { |
| table_address = |
| (acpi_physical_address)gbl_rsdp. |
| xsdt_physical_address; |
| } |
| } else if (ACPI_COMPARE_NAME(signature, ACPI_SIG_RSDT)) { |
| if (current_instance == 0) { |
| table_address = |
| (acpi_physical_address)gbl_rsdp. |
| rsdt_physical_address; |
| } |
| } else { |
| if (current_instance == 0) { |
| table_address = |
| (acpi_physical_address)gbl_rsdp_address; |
| signature = ACPI_SIG_RSDP; |
| } |
| } |
| |
| if (table_address == 0) { |
| goto exit_find_table; |
| } |
| |
| /* Now we can get the requested special table */ |
| |
| status = osl_map_table(table_address, signature, &mapped_table); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| |
| table_length = ap_get_table_length(mapped_table); |
| if (first_table_address == 0) { |
| first_table_address = table_address; |
| } |
| |
| /* Match table instance */ |
| |
| if (current_instance != instance) { |
| osl_unmap_table(mapped_table); |
| mapped_table = NULL; |
| current_instance++; |
| goto find_next_instance; |
| } |
| } else { /* Case for a normal ACPI table */ |
| |
| if (osl_can_use_xsdt()) { |
| item_size = sizeof(u64); |
| table_data = |
| ACPI_CAST8(gbl_xsdt) + |
| sizeof(struct acpi_table_header); |
| number_of_tables = |
| (u8)((gbl_xsdt->header.length - |
| sizeof(struct acpi_table_header)) |
| / item_size); |
| } else { /* Use RSDT if XSDT is not available */ |
| |
| item_size = sizeof(u32); |
| table_data = |
| ACPI_CAST8(gbl_rsdt) + |
| sizeof(struct acpi_table_header); |
| number_of_tables = |
| (u8)((gbl_rsdt->header.length - |
| sizeof(struct acpi_table_header)) |
| / item_size); |
| } |
| |
| /* Search RSDT/XSDT for the requested table */ |
| |
| for (i = 0; i < number_of_tables; ++i, table_data += item_size) { |
| if (osl_can_use_xsdt()) { |
| table_address = |
| (acpi_physical_address)(*ACPI_CAST64 |
| (table_data)); |
| } else { |
| table_address = |
| (acpi_physical_address)(*ACPI_CAST32 |
| (table_data)); |
| } |
| |
| /* Skip NULL entries in RSDT/XSDT */ |
| |
| if (table_address == 0) { |
| continue; |
| } |
| |
| status = |
| osl_map_table(table_address, NULL, &mapped_table); |
| if (ACPI_FAILURE(status)) { |
| return (status); |
| } |
| table_length = mapped_table->length; |
| |
| /* Does this table match the requested signature? */ |
| |
| if (!ACPI_COMPARE_NAME |
| (mapped_table->signature, signature)) { |
| osl_unmap_table(mapped_table); |
| mapped_table = NULL; |
| continue; |
| } |
| |
| /* Match table instance (for SSDT/UEFI tables) */ |
| |
| if (current_instance != instance) { |
| osl_unmap_table(mapped_table); |
| mapped_table = NULL; |
| current_instance++; |
| continue; |
| } |
| |
| break; |
| } |
| } |
| |
| exit_find_table: |
| |
| if (!mapped_table) { |
| return (AE_LIMIT); |
| } |
| |
| if (table_length == 0) { |
| status = AE_BAD_HEADER; |
| goto exit; |
| } |
| |
| /* Copy table to local buffer and return it */ |
| |
| local_table = calloc(1, table_length); |
| if (!local_table) { |
| status = AE_NO_MEMORY; |
| goto exit; |
| } |
| |
| memcpy(local_table, mapped_table, table_length); |
| *address = table_address; |
| *table = local_table; |
| |
| exit: |
| osl_unmap_table(mapped_table); |
| return (status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_list_customized_tables |
| * |
| * PARAMETERS: directory - Directory that contains the tables |
| * |
| * RETURN: Status; Table list is initialized if AE_OK. |
| * |
| * DESCRIPTION: Add ACPI tables to the table list from a directory. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status osl_list_customized_tables(char *directory) |
| { |
| void *table_dir; |
| u32 instance; |
| char temp_name[ACPI_NAME_SIZE]; |
| char *filename; |
| acpi_status status = AE_OK; |
| |
| /* Open the requested directory */ |
| |
| table_dir = acpi_os_open_directory(directory, "*", REQUEST_FILE_ONLY); |
| if (!table_dir) { |
| return (osl_get_last_status(AE_NOT_FOUND)); |
| } |
| |
| /* Examine all entries in this directory */ |
| |
| while ((filename = acpi_os_get_next_filename(table_dir))) { |
| |
| /* Extract table name and instance number */ |
| |
| status = |
| osl_table_name_from_file(filename, temp_name, &instance); |
| |
| /* Ignore meaningless files */ |
| |
| if (ACPI_FAILURE(status)) { |
| continue; |
| } |
| |
| /* Add new info node to global table list */ |
| |
| status = osl_add_table_to_list(temp_name, instance); |
| if (ACPI_FAILURE(status)) { |
| break; |
| } |
| } |
| |
| acpi_os_close_directory(table_dir); |
| return (status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_map_table |
| * |
| * PARAMETERS: address - Address of the table in memory |
| * signature - Optional ACPI Signature for desired table. |
| * Null terminated 4-character string. |
| * table - Where a pointer to the mapped table is |
| * returned |
| * |
| * RETURN: Status; Mapped table is returned if AE_OK. |
| * AE_NOT_FOUND: A valid table was not found at the address |
| * |
| * DESCRIPTION: Map entire ACPI table into caller's address space. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status |
| osl_map_table(acpi_size address, |
| char *signature, struct acpi_table_header **table) |
| { |
| struct acpi_table_header *mapped_table; |
| u32 length; |
| |
| if (!address) { |
| return (AE_BAD_ADDRESS); |
| } |
| |
| /* |
| * Map the header so we can get the table length. |
| * Use sizeof (struct acpi_table_header) as: |
| * 1. it is bigger than 24 to include RSDP->Length |
| * 2. it is smaller than sizeof (struct acpi_table_rsdp) |
| */ |
| mapped_table = |
| acpi_os_map_memory(address, sizeof(struct acpi_table_header)); |
| if (!mapped_table) { |
| fprintf(stderr, "Could not map table header at 0x%8.8X%8.8X\n", |
| ACPI_FORMAT_UINT64(address)); |
| return (osl_get_last_status(AE_BAD_ADDRESS)); |
| } |
| |
| /* If specified, signature must match */ |
| |
| if (signature) { |
| if (ACPI_VALIDATE_RSDP_SIG(signature)) { |
| if (!ACPI_VALIDATE_RSDP_SIG(mapped_table->signature)) { |
| acpi_os_unmap_memory(mapped_table, |
| sizeof(struct |
| acpi_table_header)); |
| return (AE_BAD_SIGNATURE); |
| } |
| } else |
| if (!ACPI_COMPARE_NAME(signature, mapped_table->signature)) |
| { |
| acpi_os_unmap_memory(mapped_table, |
| sizeof(struct acpi_table_header)); |
| return (AE_BAD_SIGNATURE); |
| } |
| } |
| |
| /* Map the entire table */ |
| |
| length = ap_get_table_length(mapped_table); |
| acpi_os_unmap_memory(mapped_table, sizeof(struct acpi_table_header)); |
| if (length == 0) { |
| return (AE_BAD_HEADER); |
| } |
| |
| mapped_table = acpi_os_map_memory(address, length); |
| if (!mapped_table) { |
| fprintf(stderr, |
| "Could not map table at 0x%8.8X%8.8X length %8.8X\n", |
| ACPI_FORMAT_UINT64(address), length); |
| return (osl_get_last_status(AE_INVALID_TABLE_LENGTH)); |
| } |
| |
| (void)ap_is_valid_checksum(mapped_table); |
| |
| *table = mapped_table; |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_unmap_table |
| * |
| * PARAMETERS: table - A pointer to the mapped table |
| * |
| * RETURN: None |
| * |
| * DESCRIPTION: Unmap entire ACPI table. |
| * |
| *****************************************************************************/ |
| |
| static void osl_unmap_table(struct acpi_table_header *table) |
| { |
| if (table) { |
| acpi_os_unmap_memory(table, ap_get_table_length(table)); |
| } |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_table_name_from_file |
| * |
| * PARAMETERS: filename - File that contains the desired table |
| * signature - Pointer to 4-character buffer to store |
| * extracted table signature. |
| * instance - Pointer to integer to store extracted |
| * table instance number. |
| * |
| * RETURN: Status; Table name is extracted if AE_OK. |
| * |
| * DESCRIPTION: Extract table signature and instance number from a table file |
| * name. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status |
| osl_table_name_from_file(char *filename, char *signature, u32 *instance) |
| { |
| |
| /* Ignore meaningless files */ |
| |
| if (strlen(filename) < ACPI_NAME_SIZE) { |
| return (AE_BAD_SIGNATURE); |
| } |
| |
| /* Extract instance number */ |
| |
| if (isdigit((int)filename[ACPI_NAME_SIZE])) { |
| sscanf(&filename[ACPI_NAME_SIZE], "%u", instance); |
| } else if (strlen(filename) != ACPI_NAME_SIZE) { |
| return (AE_BAD_SIGNATURE); |
| } else { |
| *instance = 0; |
| } |
| |
| /* Extract signature */ |
| |
| ACPI_MOVE_NAME(signature, filename); |
| return (AE_OK); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_read_table_from_file |
| * |
| * PARAMETERS: filename - File that contains the desired table |
| * file_offset - Offset of the table in file |
| * signature - Optional ACPI Signature for desired table. |
| * A null terminated 4-character string. |
| * table - Where a pointer to the table is returned |
| * |
| * RETURN: Status; Table buffer is returned if AE_OK. |
| * |
| * DESCRIPTION: Read a ACPI table from a file. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status |
| osl_read_table_from_file(char *filename, |
| acpi_size file_offset, |
| char *signature, struct acpi_table_header **table) |
| { |
| FILE *table_file; |
| struct acpi_table_header header; |
| struct acpi_table_header *local_table = NULL; |
| u32 table_length; |
| s32 count; |
| acpi_status status = AE_OK; |
| |
| /* Open the file */ |
| |
| table_file = fopen(filename, "rb"); |
| if (table_file == NULL) { |
| fprintf(stderr, "Could not open table file: %s\n", filename); |
| return (osl_get_last_status(AE_NOT_FOUND)); |
| } |
| |
| fseek(table_file, file_offset, SEEK_SET); |
| |
| /* Read the Table header to get the table length */ |
| |
| count = fread(&header, 1, sizeof(struct acpi_table_header), table_file); |
| if (count != sizeof(struct acpi_table_header)) { |
| fprintf(stderr, "Could not read table header: %s\n", filename); |
| status = AE_BAD_HEADER; |
| goto exit; |
| } |
| |
| /* If signature is specified, it must match the table */ |
| |
| if (signature) { |
| if (ACPI_VALIDATE_RSDP_SIG(signature)) { |
| if (!ACPI_VALIDATE_RSDP_SIG(header.signature)) { |
| fprintf(stderr, |
| "Incorrect RSDP signature: found %8.8s\n", |
| header.signature); |
| status = AE_BAD_SIGNATURE; |
| goto exit; |
| } |
| } else if (!ACPI_COMPARE_NAME(signature, header.signature)) { |
| fprintf(stderr, |
| "Incorrect signature: Expecting %4.4s, found %4.4s\n", |
| signature, header.signature); |
| status = AE_BAD_SIGNATURE; |
| goto exit; |
| } |
| } |
| |
| table_length = ap_get_table_length(&header); |
| if (table_length == 0) { |
| status = AE_BAD_HEADER; |
| goto exit; |
| } |
| |
| /* Read the entire table into a local buffer */ |
| |
| local_table = calloc(1, table_length); |
| if (!local_table) { |
| fprintf(stderr, |
| "%4.4s: Could not allocate buffer for table of length %X\n", |
| header.signature, table_length); |
| status = AE_NO_MEMORY; |
| goto exit; |
| } |
| |
| fseek(table_file, file_offset, SEEK_SET); |
| |
| count = fread(local_table, 1, table_length, table_file); |
| if (count != table_length) { |
| fprintf(stderr, "%4.4s: Could not read table content\n", |
| header.signature); |
| status = AE_INVALID_TABLE_LENGTH; |
| goto exit; |
| } |
| |
| /* Validate checksum */ |
| |
| (void)ap_is_valid_checksum(local_table); |
| |
| exit: |
| fclose(table_file); |
| *table = local_table; |
| return (status); |
| } |
| |
| /****************************************************************************** |
| * |
| * FUNCTION: osl_get_customized_table |
| * |
| * PARAMETERS: pathname - Directory to find Linux customized table |
| * signature - ACPI Signature for desired table. Must be |
| * a null terminated 4-character string. |
| * instance - Multiple table support for SSDT/UEFI (0...n) |
| * Must be 0 for other tables. |
| * table - Where a pointer to the table is returned |
| * address - Where the table physical address is returned |
| * |
| * RETURN: Status; Table buffer is returned if AE_OK. |
| * AE_LIMIT: Instance is beyond valid limit |
| * AE_NOT_FOUND: A table with the signature was not found |
| * |
| * DESCRIPTION: Get an OS customized table. |
| * |
| *****************************************************************************/ |
| |
| static acpi_status |
| osl_get_customized_table(char *pathname, |
| char *signature, |
| u32 instance, |
| struct acpi_table_header **table, |
| acpi_physical_address *address) |
| { |
| void *table_dir; |
| u32 current_instance = 0; |
| char temp_name[ACPI_NAME_SIZE]; |
| char table_filename[PATH_MAX]; |
| char *filename; |
| acpi_status status; |
| |
| /* Open the directory for customized tables */ |
| |
| table_dir = acpi_os_open_directory(pathname, "*", REQUEST_FILE_ONLY); |
| if (!table_dir) { |
| return (osl_get_last_status(AE_NOT_FOUND)); |
| } |
| |
| /* Attempt to find the table in the directory */ |
| |
| while ((filename = acpi_os_get_next_filename(table_dir))) { |
| |
| /* Ignore meaningless files */ |
| |
| if (!ACPI_COMPARE_NAME(filename, signature)) { |
| continue; |
| } |
| |
| /* Extract table name and instance number */ |
| |
| status = |
| osl_table_name_from_file(filename, temp_name, |
| ¤t_instance); |
| |
| /* Ignore meaningless files */ |
| |
| if (ACPI_FAILURE(status) || current_instance != instance) { |
| continue; |
| } |
| |
| /* Create the table pathname */ |
| |
| if (instance != 0) { |
| sprintf(table_filename, "%s/%4.4s%d", pathname, |
| temp_name, instance); |
| } else { |
| sprintf(table_filename, "%s/%4.4s", pathname, |
| temp_name); |
| } |
| break; |
| } |
| |
| acpi_os_close_directory(table_dir); |
| |
| if (!filename) { |
| return (AE_LIMIT); |
| } |
| |
| /* There is no physical address saved for customized tables, use zero */ |
| |
| *address = 0; |
| status = osl_read_table_from_file(table_filename, 0, NULL, table); |
| |
| return (status); |
| } |