struct work_struct work;
};
-#ifdef CONFIG_ACPI_CUSTOM_DSDT
-#include CONFIG_ACPI_CUSTOM_DSDT_FILE
-#endif
-
#ifdef ENABLE_DEBUGGER
#include <linux/kdb.h>
acpi_status
acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
- char **new_val)
+ acpi_string *new_val)
{
if (!init_val || !new_val)
return AE_BAD_PARAMETER;
return AE_OK;
}
-static void acpi_table_taint(struct acpi_table_header *table)
-{
- pr_warn(PREFIX
- "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
- table->signature, table->oem_table_id);
- add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
-}
-
-#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
-#include <linux/earlycpio.h>
-#include <linux/memblock.h>
-
-static u64 acpi_tables_addr;
-static int all_tables_size;
-
-/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
-static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
-{
- u8 sum = 0;
- u8 *end = buffer + length;
-
- while (buffer < end)
- sum = (u8) (sum + *(buffer++));
- return sum;
-}
-
-/* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
-static const char * const table_sigs[] = {
- ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
- ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
- ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
- ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
- ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
- ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
- ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
- ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
- ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
-
-#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
-
-#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)
-
-void __init acpi_initrd_override(void *data, size_t size)
-{
- int sig, no, table_nr = 0, total_offset = 0;
- long offset = 0;
- struct acpi_table_header *table;
- char cpio_path[32] = "kernel/firmware/acpi/";
- struct cpio_data file;
-
- if (data == NULL || size == 0)
- return;
-
- for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
- file = find_cpio_data(cpio_path, data, size, &offset);
- if (!file.data)
- break;
-
- data += offset;
- size -= offset;
-
- if (file.size < sizeof(struct acpi_table_header)) {
- pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
-
- table = file.data;
-
- for (sig = 0; table_sigs[sig]; sig++)
- if (!memcmp(table->signature, table_sigs[sig], 4))
- break;
-
- if (!table_sigs[sig]) {
- pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
- if (file.size != table->length) {
- pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
- if (acpi_table_checksum(file.data, table->length)) {
- pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
- cpio_path, file.name);
- continue;
- }
-
- pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
- table->signature, cpio_path, file.name, table->length);
-
- all_tables_size += table->length;
- acpi_initrd_files[table_nr].data = file.data;
- acpi_initrd_files[table_nr].size = file.size;
- table_nr++;
- }
- if (table_nr == 0)
- return;
-
- acpi_tables_addr =
- memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
- all_tables_size, PAGE_SIZE);
- if (!acpi_tables_addr) {
- WARN_ON(1);
- return;
- }
- /*
- * Only calling e820_add_reserve does not work and the
- * tables are invalid (memory got used) later.
- * memblock_reserve works as expected and the tables won't get modified.
- * But it's not enough on X86 because ioremap will
- * complain later (used by acpi_os_map_memory) that the pages
- * that should get mapped are not marked "reserved".
- * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
- * works fine.
- */
- memblock_reserve(acpi_tables_addr, all_tables_size);
- arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
-
- /*
- * early_ioremap only can remap 256k one time. If we map all
- * tables one time, we will hit the limit. Need to map chunks
- * one by one during copying the same as that in relocate_initrd().
- */
- for (no = 0; no < table_nr; no++) {
- unsigned char *src_p = acpi_initrd_files[no].data;
- phys_addr_t size = acpi_initrd_files[no].size;
- phys_addr_t dest_addr = acpi_tables_addr + total_offset;
- phys_addr_t slop, clen;
- char *dest_p;
-
- total_offset += size;
-
- while (size) {
- slop = dest_addr & ~PAGE_MASK;
- clen = size;
- if (clen > MAP_CHUNK_SIZE - slop)
- clen = MAP_CHUNK_SIZE - slop;
- dest_p = early_ioremap(dest_addr & PAGE_MASK,
- clen + slop);
- memcpy(dest_p + slop, src_p, clen);
- early_iounmap(dest_p, clen + slop);
- src_p += clen;
- dest_addr += clen;
- size -= clen;
- }
- }
-}
-
-acpi_status
-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;
-
- *length = 0;
- *address = 0;
- if (!acpi_tables_addr)
- return AE_OK;
-
- 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 AE_OK;
- }
-
- table_length = table->length;
-
- /* Only override tables matched */
- 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);
- goto next_table;
- }
-
- *length = table_length;
- *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,
- acpi_physical_address *address,
- u32 *table_length)
-{
- *table_length = 0;
- *address = 0;
- return AE_OK;
-}
-
-void __init acpi_initrd_initialize_tables(void)
-{
-}
-#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
-
-acpi_status
-acpi_os_table_override(struct acpi_table_header *existing_table,
- struct acpi_table_header **new_table)
-{
- if (!existing_table || !new_table)
- return AE_BAD_PARAMETER;
-
- *new_table = NULL;
-
-#ifdef CONFIG_ACPI_CUSTOM_DSDT
- if (strncmp(existing_table->signature, "DSDT", 4) == 0)
- *new_table = (struct acpi_table_header *)AmlCode;
-#endif
- if (*new_table != NULL)
- acpi_table_taint(existing_table);
- return AE_OK;
-}
-
static irqreturn_t acpi_irq(int irq, void *dev_id)
{
u32 handled;
projects / linux-2.6-block.git / blobdiff