diff options
Diffstat (limited to 'tools/power/acpi/os_specific/service_layers/oslinuxtbl.c')
| -rw-r--r-- | tools/power/acpi/os_specific/service_layers/oslinuxtbl.c | 106 |
1 files changed, 80 insertions, 26 deletions
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c index e975aa90016..28c52008e85 100644 --- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c +++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c @@ -505,6 +505,28 @@ static acpi_status osl_load_rsdp(void) /****************************************************************************** * + * 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 @@ -535,7 +557,7 @@ static acpi_status osl_table_initialize(void) /* Get XSDT from memory */ - if (gbl_rsdp.revision) { + if (gbl_rsdp.revision && !gbl_do_not_dump_xsdt) { if (gbl_xsdt) { free(gbl_xsdt); gbl_xsdt = NULL; @@ -668,7 +690,7 @@ static acpi_status osl_list_bios_tables(void) acpi_status status = AE_OK; u32 i; - if (gbl_revision) { + if (osl_can_use_xsdt()) { item_size = sizeof(u64); table_data = ACPI_CAST8(gbl_xsdt) + sizeof(struct acpi_table_header); @@ -690,7 +712,7 @@ static acpi_status osl_list_bios_tables(void) /* Search RSDT/XSDT for the requested table */ for (i = 0; i < number_of_tables; ++i, table_data += item_size) { - if (gbl_revision) { + if (osl_can_use_xsdt()) { table_address = (acpi_physical_address) (*ACPI_CAST64(table_data)); } else { @@ -698,6 +720,12 @@ static acpi_status osl_list_bios_tables(void) (acpi_physical_address) (*ACPI_CAST32(table_data)); } + /* Skip NULL entries in RSDT/XSDT */ + + if (!table_address) { + continue; + } + status = osl_map_table(table_address, NULL, &mapped_table); if (ACPI_FAILURE(status)) { return (status); @@ -755,6 +783,10 @@ osl_get_bios_table(char *signature, ACPI_COMPARE_NAME(signature, ACPI_SIG_XSDT) || ACPI_COMPARE_NAME(signature, ACPI_SIG_DSDT) || ACPI_COMPARE_NAME(signature, ACPI_SIG_FACS)) { + if (instance > 0) { + return (AE_LIMIT); + } + /* * Get the appropriate address, either 32-bit or 64-bit. Be very * careful about the FADT length and validate table addresses. @@ -809,7 +841,7 @@ osl_get_bios_table(char *signature, table_length = ap_get_table_length(mapped_table); } else { /* Case for a normal ACPI table */ - if (gbl_revision) { + if (osl_can_use_xsdt()) { item_size = sizeof(u64); table_data = ACPI_CAST8(gbl_xsdt) + @@ -833,7 +865,7 @@ osl_get_bios_table(char *signature, /* Search RSDT/XSDT for the requested table */ for (i = 0; i < number_of_tables; ++i, table_data += item_size) { - if (gbl_revision) { + if (osl_can_use_xsdt()) { table_address = (acpi_physical_address) (*ACPI_CAST64 (table_data)); @@ -843,6 +875,12 @@ osl_get_bios_table(char *signature, (table_data)); } + /* Skip NULL entries in RSDT/XSDT */ + + if (!table_address) { + continue; + } + status = osl_map_table(table_address, NULL, &mapped_table); if (ACPI_FAILURE(status)) { @@ -996,10 +1034,21 @@ osl_map_table(acpi_size address, /* If specified, signature must match */ - if (signature && !ACPI_COMPARE_NAME(signature, mapped_table->signature)) { - acpi_os_unmap_memory(mapped_table, - sizeof(struct acpi_table_header)); - return (AE_BAD_SIGNATURE); + 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 */ @@ -1112,7 +1161,6 @@ osl_read_table_from_file(char *filename, struct acpi_table_header *local_table = NULL; u32 table_length; s32 count; - u32 total = 0; acpi_status status = AE_OK; /* Open the file */ @@ -1136,12 +1184,22 @@ osl_read_table_from_file(char *filename, /* If signature is specified, it must match the table */ - if (signature && !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; + 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); @@ -1163,16 +1221,12 @@ osl_read_table_from_file(char *filename, fseek(table_file, file_offset, SEEK_SET); - while (!feof(table_file) && total < table_length) { - count = fread(local_table + total, 1, table_length - total, table_file); - if (count < 0) { - fprintf(stderr, "%4.4s: Could not read table content\n", - header.signature); - status = AE_INVALID_TABLE_LENGTH; - goto exit; - } - - total += count; + 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 */ |