diff options
Diffstat (limited to 'drivers/acpi/acpica/tbutils.c')
| -rw-r--r-- | drivers/acpi/acpica/tbutils.c | 106 |
1 files changed, 72 insertions, 34 deletions
diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c index 22ce4898572..ef7d2c2d8f0 100644 --- a/drivers/acpi/acpica/tbutils.c +++ b/drivers/acpi/acpica/tbutils.c @@ -177,19 +177,23 @@ acpi_tb_print_table_header(acpi_physical_address address, struct acpi_table_header *header) { + /* + * The reason that the Address is cast to a void pointer is so that we + * can use %p which will work properly on both 32-bit and 64-bit hosts. + */ if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { - /* FACS only has signature and length fields of common table header */ + /* FACS only has signature and length fields */ - ACPI_INFO((AE_INFO, "%4.4s %08lX, %04X", - header->signature, (unsigned long)address, + ACPI_INFO((AE_INFO, "%4.4s %p %05X", + header->signature, ACPI_CAST_PTR(void, address), header->length)); } else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) { /* RSDP has no common fields */ - ACPI_INFO((AE_INFO, "RSDP %08lX, %04X (r%d %6.6s)", - (unsigned long)address, + ACPI_INFO((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)", + ACPI_CAST_PTR (void, address), (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> revision > 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, @@ -202,8 +206,8 @@ acpi_tb_print_table_header(acpi_physical_address address, /* Standard ACPI table with full common header */ ACPI_INFO((AE_INFO, - "%4.4s %08lX, %04X (r%d %6.6s %8.8s %8X %4.4s %8X)", - header->signature, (unsigned long)address, + "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", + header->signature, ACPI_CAST_PTR (void, address), header->length, header->revision, header->oem_id, header->oem_table_id, header->oem_revision, header->asl_compiler_id, @@ -280,22 +284,28 @@ u8 acpi_tb_checksum(u8 *buffer, u32 length) * FUNCTION: acpi_tb_install_table * * PARAMETERS: Address - Physical address of DSDT or FACS - * Flags - Flags * Signature - Table signature, NULL if no need to * match * table_index - Index into root table array * * RETURN: None * - * DESCRIPTION: Install an ACPI table into the global data structure. + * DESCRIPTION: Install an ACPI table into the global data structure. The + * table override mechanism is implemented here to allow the host + * OS to replace any table before it is installed in the root + * table array. * ******************************************************************************/ void acpi_tb_install_table(acpi_physical_address address, - u8 flags, char *signature, u32 table_index) + char *signature, u32 table_index) { - struct acpi_table_header *table; + u8 flags; + acpi_status status; + struct acpi_table_header *table_to_install; + struct acpi_table_header *mapped_table; + struct acpi_table_header *override_table = NULL; if (!address) { ACPI_ERROR((AE_INFO, @@ -306,41 +316,69 @@ acpi_tb_install_table(acpi_physical_address address, /* Map just the table header */ - table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); - if (!table) { + mapped_table = + acpi_os_map_memory(address, sizeof(struct acpi_table_header)); + if (!mapped_table) { return; } - /* If a particular signature is expected, signature must match */ + /* If a particular signature is expected (DSDT/FACS), it must match */ - if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) { + if (signature && !ACPI_COMPARE_NAME(mapped_table->signature, signature)) { ACPI_ERROR((AE_INFO, - "Invalid signature 0x%X for ACPI table [%s]", - *ACPI_CAST_PTR(u32, table->signature), signature)); + "Invalid signature 0x%X for ACPI table, expected [%s]", + *ACPI_CAST_PTR(u32, mapped_table->signature), + signature)); goto unmap_and_exit; } + /* + * ACPI Table Override: + * + * 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. + */ + status = acpi_os_table_override(mapped_table, &override_table); + if (ACPI_SUCCESS(status) && override_table) { + ACPI_INFO((AE_INFO, + "%4.4s @ 0x%p Table override, replaced with:", + mapped_table->signature, ACPI_CAST_PTR(void, + address))); + + acpi_gbl_root_table_list.tables[table_index].pointer = + override_table; + address = ACPI_PTR_TO_PHYSADDR(override_table); + + table_to_install = override_table; + flags = ACPI_TABLE_ORIGIN_OVERRIDE; + } else { + table_to_install = mapped_table; + flags = ACPI_TABLE_ORIGIN_MAPPED; + } + /* Initialize the table entry */ acpi_gbl_root_table_list.tables[table_index].address = address; - acpi_gbl_root_table_list.tables[table_index].length = table->length; + acpi_gbl_root_table_list.tables[table_index].length = + table_to_install->length; acpi_gbl_root_table_list.tables[table_index].flags = flags; ACPI_MOVE_32_TO_32(& (acpi_gbl_root_table_list.tables[table_index]. - signature), table->signature); + signature), table_to_install->signature); - acpi_tb_print_table_header(address, table); + acpi_tb_print_table_header(address, table_to_install); if (table_index == ACPI_TABLE_INDEX_DSDT) { /* Global integer width is based upon revision of the DSDT */ - acpi_ut_set_integer_width(table->revision); + acpi_ut_set_integer_width(table_to_install->revision); } unmap_and_exit: - acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); + acpi_os_unmap_memory(mapped_table, sizeof(struct acpi_table_header)); } /******************************************************************************* @@ -379,7 +417,8 @@ acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) } else { /* * 32-bit platform, XSDT: Truncate 64-bit to 32-bit and return - * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, return 64-bit + * 64-bit platform, XSDT: Move (unaligned) 64-bit to local, + * return 64-bit */ ACPI_MOVE_64_TO_64(&address64, table_entry); @@ -389,7 +428,8 @@ acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) /* Will truncate 64-bit address to 32 bits, issue warning */ ACPI_WARNING((AE_INFO, - "64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating", + "64-bit Physical Address in XSDT is too large (%8.8X%8.8X)," + " truncating", ACPI_FORMAT_UINT64(address64))); } #endif @@ -402,7 +442,6 @@ acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) * FUNCTION: acpi_tb_parse_root_table * * PARAMETERS: Rsdp - Pointer to the RSDP - * Flags - Flags * * RETURN: Status * @@ -416,7 +455,7 @@ acpi_tb_get_root_table_entry(u8 *table_entry, u32 table_entry_size) ******************************************************************************/ acpi_status __init -acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) +acpi_tb_parse_root_table(acpi_physical_address rsdp_address) { struct acpi_table_rsdp *rsdp; u32 table_entry_size; @@ -513,13 +552,12 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) /* Calculate the number of tables described in the root table */ - table_count = - (u32) ((table->length - - sizeof(struct acpi_table_header)) / table_entry_size); - + table_count = (u32)((table->length - sizeof(struct acpi_table_header)) / + table_entry_size); /* - * First two entries in the table array are reserved for the DSDT and FACS, - * which are not actually present in the RSDT/XSDT - they come from the FADT + * First two entries in the table array are reserved for the DSDT + * and FACS, which are not actually present in the RSDT/XSDT - they + * come from the FADT */ table_entry = ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); @@ -567,14 +605,14 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) */ for (i = 2; i < acpi_gbl_root_table_list.count; i++) { acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. - address, flags, NULL, i); + address, NULL, i); /* Special case for FADT - get the DSDT and FACS */ if (ACPI_COMPARE_NAME (&acpi_gbl_root_table_list.tables[i].signature, ACPI_SIG_FADT)) { - acpi_tb_parse_fadt(i, flags); + acpi_tb_parse_fadt(i); } } |