diff options
Diffstat (limited to 'drivers/acpi/tables/tbutils.c')
| -rw-r--r-- | drivers/acpi/tables/tbutils.c | 121 |
1 files changed, 82 insertions, 39 deletions
diff --git a/drivers/acpi/tables/tbutils.c b/drivers/acpi/tables/tbutils.c index 77c7e873ec3..8e44f83a64e 100644 --- a/drivers/acpi/tables/tbutils.c +++ b/drivers/acpi/tables/tbutils.c @@ -60,6 +60,10 @@ static void inline acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, u8 bit_width, u64 address); +static acpi_physical_address +acpi_tb_get_root_table_entry(u8 * table_entry, + acpi_native_uint table_entry_size); + /* Table used for conversion of FADT to common format */ typedef struct acpi_fadt_conversion { @@ -126,10 +130,14 @@ acpi_tb_print_table_header(acpi_physical_address address, ACPI_INFO((AE_INFO, "RSDP @ 0x%p/0x%04X (v%3.3d %6.6s)", ACPI_CAST_PTR(void, address), - (((struct acpi_table_rsdp *)header)->revision > 0) ? - ((struct acpi_table_rsdp *)header)->length : 20, - ((struct acpi_table_rsdp *)header)->revision, - ((struct acpi_table_rsdp *)header)->oem_id)); + (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> + revision > + 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, + header)->length : 20, + ACPI_CAST_PTR(struct acpi_table_rsdp, + header)->revision, + ACPI_CAST_PTR(struct acpi_table_rsdp, + header)->oem_id)); } else { /* Standard ACPI table with full common header */ @@ -278,8 +286,8 @@ static void acpi_tb_convert_fadt(void) } /* - * Expand the V1.0 addresses to the "X" generic address structs, - * as necessary. + * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address + * structures as necessary. */ for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) { target = @@ -294,10 +302,11 @@ static void acpi_tb_convert_fadt(void) &acpi_gbl_FADT, fadt_conversion_table [i].length), - *ACPI_ADD_PTR(u32, - &acpi_gbl_FADT, - fadt_conversion_table - [i].source)); + (u64) * ACPI_ADD_PTR(u32, + &acpi_gbl_FADT, + fadt_conversion_table + [i]. + source)); } } @@ -444,7 +453,7 @@ static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) /* Copy the entire FADT locally */ - ACPI_MEMSET(&acpi_gbl_FADT, sizeof(struct acpi_table_fadt), 0); + ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); ACPI_MEMCPY(&acpi_gbl_FADT, table, ACPI_MIN(length, sizeof(struct acpi_table_fadt))); @@ -465,6 +474,61 @@ static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) /******************************************************************************* * + * FUNCTION: acpi_tb_get_root_table_entry + * + * PARAMETERS: table_entry - Pointer to the RSDT/XSDT table entry + * table_entry_size - sizeof 32 or 64 (RSDT or XSDT) + * + * RETURN: Physical address extracted from the root table + * + * DESCRIPTION: Get one root table entry. Handles 32-bit and 64-bit cases on + * both 32-bit and 64-bit platforms + * + * NOTE: acpi_physical_address is 32-bit on 32-bit platforms, 64-bit on + * 64-bit platforms. + * + ******************************************************************************/ + +static acpi_physical_address +acpi_tb_get_root_table_entry(u8 * table_entry, + acpi_native_uint table_entry_size) +{ + u64 address64; + + /* + * Get the table physical address (32-bit for RSDT, 64-bit for XSDT): + * Note: Addresses are 32-bit aligned (not 64) in both RSDT and XSDT + */ + if (table_entry_size == sizeof(u32)) { + /* + * 32-bit platform, RSDT: Return 32-bit table entry + * 64-bit platform, RSDT: Expand 32-bit to 64-bit and return + */ + return ((acpi_physical_address) + (*ACPI_CAST_PTR(u32, table_entry))); + } 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 + */ + ACPI_MOVE_64_TO_64(&address64, table_entry); + +#if ACPI_MACHINE_WIDTH == 32 + if (address64 > ACPI_UINT32_MAX) { + + /* Will truncate 64-bit address to 32 bits */ + + ACPI_WARNING((AE_INFO, + "64-bit Physical Address in XSDT is too large (%8.8X%8.8X), truncating", + ACPI_FORMAT_UINT64(address64))); + } +#endif + return ((acpi_physical_address) (address64)); + } +} + +/******************************************************************************* + * * FUNCTION: acpi_tb_parse_root_table * * PARAMETERS: Rsdp - Pointer to the RSDP @@ -567,8 +631,8 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) /* Calculate the number of tables described in the root table */ table_count = - (table->length - - sizeof(struct acpi_table_header)) / table_entry_size; + (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, @@ -599,32 +663,11 @@ acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) } } - /* - * Get the table physical address (32-bit for RSDT, 64-bit for XSDT) - */ - if ((table_entry_size == sizeof(u32)) || - (sizeof(acpi_physical_address) == sizeof(u32))) { - /* - * 32-bit platform, RSDT: Move 32-bit to 32-bit - * 32-bit platform, XSDT: Truncate 64-bit to 32-bit - * 64-bit platform, RSDT: Expand 32-bit to 64-bit - * - * Note: Addresses are 32-bit aligned in both RSDT and XSDT - */ - acpi_gbl_root_table_list. - tables[acpi_gbl_root_table_list.count].address = - (acpi_physical_address) (*ACPI_CAST_PTR - (u32, table_entry)); - } else { - /* - * 64-bit platform, XSDT: Move 64-bit to 64-bit - * - * Note: 64-bit addresses are only 32-bit aligned in the XSDT - */ - ACPI_MOVE_64_TO_64(&acpi_gbl_root_table_list. - tables[acpi_gbl_root_table_list. - count].address, table_entry); - } + /* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ + + acpi_gbl_root_table_list.tables[acpi_gbl_root_table_list.count]. + address = + acpi_tb_get_root_table_entry(table_entry, table_entry_size); table_entry += table_entry_size; acpi_gbl_root_table_list.count++; |