diff options
| -rw-r--r-- | drivers/acpi/internal.h | 1 | ||||
| -rw-r--r-- | drivers/acpi/osl.c | 50 | ||||
| -rw-r--r-- | drivers/acpi/tables.c | 2 |
3 files changed, 52 insertions, 1 deletions
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 1e6833a5cd44..27c2cb90e8e4 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -20,6 +20,7 @@ #define PREFIX "ACPI: " +void acpi_initrd_initialize_tables(void); acpi_status acpi_os_initialize1(void); void init_acpi_device_notify(void); int acpi_scan_init(void); diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index a8c417c2f480..814d5f83b75e 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -644,6 +644,7 @@ static const char * const table_sigs[] = { #define ACPI_OVERRIDE_TABLES 64 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; +static DECLARE_BITMAP(acpi_initrd_installed, ACPI_OVERRIDE_TABLES); #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) @@ -760,6 +761,7 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table, acpi_physical_address *address, u32 *length) { int table_offset = 0; + int table_index = 0; struct acpi_table_header *table; u32 table_length; @@ -780,7 +782,8 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table, table_length = table->length; /* Only override tables matched */ - if (memcmp(existing_table->signature, table->signature, 4) || + if (test_bit(table_index, acpi_initrd_installed) || + memcmp(existing_table->signature, table->signature, 4) || memcmp(table->oem_table_id, existing_table->oem_table_id, ACPI_OEM_TABLE_ID_SIZE)) { acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); @@ -791,13 +794,54 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table, *address = acpi_tables_addr + table_offset; acpi_table_taint(existing_table); acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); + set_bit(table_index, acpi_initrd_installed); break; next_table: table_offset += table_length; + table_index++; } return AE_OK; } + +void __init acpi_initrd_initialize_tables(void) +{ + int table_offset = 0; + int table_index = 0; + u32 table_length; + struct acpi_table_header *table; + + if (!acpi_tables_addr) + return; + + while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { + table = acpi_os_map_memory(acpi_tables_addr + table_offset, + ACPI_HEADER_SIZE); + if (table_offset + table->length > all_tables_size) { + acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); + WARN_ON(1); + return; + } + + table_length = table->length; + + /* Skip RSDT/XSDT which should only be used for override */ + if (test_bit(table_index, acpi_initrd_installed) || + ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) || + ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) { + acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); + goto next_table; + } + + acpi_table_taint(table); + acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); + acpi_install_table(acpi_tables_addr + table_offset, TRUE); + set_bit(table_index, acpi_initrd_installed); +next_table: + table_offset += table_length; + table_index++; + } +} #else acpi_status acpi_os_physical_table_override(struct acpi_table_header *existing_table, @@ -808,6 +852,10 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table, *address = 0; return AE_OK; } + +void __init acpi_initrd_initialize_tables(void) +{ +} #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ acpi_status diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c index 6c0f0794aa82..57c0a4525dba 100644 --- a/drivers/acpi/tables.c +++ b/drivers/acpi/tables.c @@ -32,6 +32,7 @@ #include <linux/errno.h> #include <linux/acpi.h> #include <linux/bootmem.h> +#include "internal.h" #define ACPI_MAX_TABLES 128 @@ -456,6 +457,7 @@ int __init acpi_table_init(void) status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); if (ACPI_FAILURE(status)) return -EINVAL; + acpi_initrd_initialize_tables(); check_multiple_madt(); return 0; |