| /* |
| * acpi_tables.c - ACPI Boot-Time Table Parsing |
| * |
| * Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| */ |
| |
| /* Uncomment next line to get verbose printout */ |
| /* #define DEBUG */ |
| #define pr_fmt(fmt) "ACPI: " fmt |
| |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/smp.h> |
| #include <linux/string.h> |
| #include <linux/types.h> |
| #include <linux/irq.h> |
| #include <linux/errno.h> |
| #include <linux/acpi.h> |
| #include <linux/bootmem.h> |
| #include <linux/earlycpio.h> |
| #include <linux/memblock.h> |
| #include <linux/initrd.h> |
| #include "internal.h" |
| |
| #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| #include CONFIG_ACPI_CUSTOM_DSDT_FILE |
| #endif |
| |
| #define ACPI_MAX_TABLES 128 |
| |
| static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
| static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; |
| |
| static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
| |
| static int acpi_apic_instance __initdata; |
| |
| /* |
| * Disable table checksum verification for the early stage due to the size |
| * limitation of the current x86 early mapping implementation. |
| */ |
| static bool acpi_verify_table_checksum __initdata = false; |
| |
| void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
| { |
| if (!header) |
| return; |
| |
| switch (header->type) { |
| |
| case ACPI_MADT_TYPE_LOCAL_APIC: |
| { |
| struct acpi_madt_local_apic *p = |
| (struct acpi_madt_local_apic *)header; |
| pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
| p->processor_id, p->id, |
| (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_LOCAL_X2APIC: |
| { |
| struct acpi_madt_local_x2apic *p = |
| (struct acpi_madt_local_x2apic *)header; |
| pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
| p->local_apic_id, p->uid, |
| (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_IO_APIC: |
| { |
| struct acpi_madt_io_apic *p = |
| (struct acpi_madt_io_apic *)header; |
| pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
| p->id, p->address, p->global_irq_base); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
| { |
| struct acpi_madt_interrupt_override *p = |
| (struct acpi_madt_interrupt_override *)header; |
| pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
| p->bus, p->source_irq, p->global_irq, |
| mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); |
| if (p->inti_flags & |
| ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) |
| pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
| p->inti_flags & |
| ~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_NMI_SOURCE: |
| { |
| struct acpi_madt_nmi_source *p = |
| (struct acpi_madt_nmi_source *)header; |
| pr_info("NMI_SRC (%s %s global_irq %d)\n", |
| mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| p->global_irq); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
| { |
| struct acpi_madt_local_apic_nmi *p = |
| (struct acpi_madt_local_apic_nmi *)header; |
| pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
| p->processor_id, |
| mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], |
| mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| p->lint); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: |
| { |
| u16 polarity, trigger; |
| struct acpi_madt_local_x2apic_nmi *p = |
| (struct acpi_madt_local_x2apic_nmi *)header; |
| |
| polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; |
| trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; |
| |
| pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
| p->uid, |
| mps_inti_flags_polarity[polarity], |
| mps_inti_flags_trigger[trigger], |
| p->lint); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
| { |
| struct acpi_madt_local_apic_override *p = |
| (struct acpi_madt_local_apic_override *)header; |
| pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
| (void *)(unsigned long)p->address); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_IO_SAPIC: |
| { |
| struct acpi_madt_io_sapic *p = |
| (struct acpi_madt_io_sapic *)header; |
| pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
| p->id, (void *)(unsigned long)p->address, |
| p->global_irq_base); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_LOCAL_SAPIC: |
| { |
| struct acpi_madt_local_sapic *p = |
| (struct acpi_madt_local_sapic *)header; |
| pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
| p->processor_id, p->id, p->eid, |
| (p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
| { |
| struct acpi_madt_interrupt_source *p = |
| (struct acpi_madt_interrupt_source *)header; |
| pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n", |
| mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
| mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
| p->type, p->id, p->eid, p->io_sapic_vector, |
| p->global_irq); |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
| { |
| struct acpi_madt_generic_interrupt *p = |
| (struct acpi_madt_generic_interrupt *)header; |
| pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", |
| p->uid, p->base_address, |
| p->arm_mpidr, |
| (p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
| |
| } |
| break; |
| |
| case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: |
| { |
| struct acpi_madt_generic_distributor *p = |
| (struct acpi_madt_generic_distributor *)header; |
| pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", |
| p->gic_id, p->base_address, |
| p->global_irq_base); |
| } |
| break; |
| |
| default: |
| pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
| header->type); |
| break; |
| } |
| } |
| |
| /** |
| * acpi_parse_entries_array - for each proc_num find a suitable subtable |
| * |
| * @id: table id (for debugging purposes) |
| * @table_size: size of the root table |
| * @table_header: where does the table start? |
| * @proc: array of acpi_subtable_proc struct containing entry id |
| * and associated handler with it |
| * @proc_num: how big proc is? |
| * @max_entries: how many entries can we process? |
| * |
| * For each proc_num find a subtable with proc->id and run proc->handler |
| * on it. Assumption is that there's only single handler for particular |
| * entry id. |
| * |
| * The table_size is not the size of the complete ACPI table (the length |
| * field in the header struct), but only the size of the root table; i.e., |
| * the offset from the very first byte of the complete ACPI table, to the |
| * first byte of the very first subtable. |
| * |
| * On success returns sum of all matching entries for all proc handlers. |
| * Otherwise, -ENODEV or -EINVAL is returned. |
| */ |
| static int __init |
| acpi_parse_entries_array(char *id, unsigned long table_size, |
| struct acpi_table_header *table_header, |
| struct acpi_subtable_proc *proc, int proc_num, |
| unsigned int max_entries) |
| { |
| struct acpi_subtable_header *entry; |
| unsigned long table_end; |
| int count = 0; |
| int errs = 0; |
| int i; |
| |
| if (acpi_disabled) |
| return -ENODEV; |
| |
| if (!id) |
| return -EINVAL; |
| |
| if (!table_size) |
| return -EINVAL; |
| |
| if (!table_header) { |
| pr_warn("%4.4s not present\n", id); |
| return -ENODEV; |
| } |
| |
| table_end = (unsigned long)table_header + table_header->length; |
| |
| /* Parse all entries looking for a match. */ |
| |
| entry = (struct acpi_subtable_header *) |
| ((unsigned long)table_header + table_size); |
| |
| while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) < |
| table_end) { |
| if (max_entries && count >= max_entries) |
| break; |
| |
| for (i = 0; i < proc_num; i++) { |
| if (entry->type != proc[i].id) |
| continue; |
| if (!proc[i].handler || |
| (!errs && proc[i].handler(entry, table_end))) { |
| errs++; |
| continue; |
| } |
| |
| proc[i].count++; |
| break; |
| } |
| if (i != proc_num) |
| count++; |
| |
| /* |
| * If entry->length is 0, break from this loop to avoid |
| * infinite loop. |
| */ |
| if (entry->length == 0) { |
| pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
| return -EINVAL; |
| } |
| |
| entry = (struct acpi_subtable_header *) |
| ((unsigned long)entry + entry->length); |
| } |
| |
| if (max_entries && count > max_entries) { |
| pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", |
| id, proc->id, count); |
| } |
| |
| return errs ? -EINVAL : count; |
| } |
| |
| int __init |
| acpi_table_parse_entries_array(char *id, |
| unsigned long table_size, |
| struct acpi_subtable_proc *proc, int proc_num, |
| unsigned int max_entries) |
| { |
| struct acpi_table_header *table_header = NULL; |
| int count; |
| u32 instance = 0; |
| |
| if (acpi_disabled) |
| return -ENODEV; |
| |
| if (!id) |
| return -EINVAL; |
| |
| if (!strncmp(id, ACPI_SIG_MADT, 4)) |
| instance = acpi_apic_instance; |
| |
| acpi_get_table(id, instance, &table_header); |
| if (!table_header) { |
| pr_warn("%4.4s not present\n", id); |
| return -ENODEV; |
| } |
| |
| count = acpi_parse_entries_array(id, table_size, table_header, |
| proc, proc_num, max_entries); |
| |
| acpi_put_table(table_header); |
| return count; |
| } |
| |
| int __init |
| acpi_table_parse_entries(char *id, |
| unsigned long table_size, |
| int entry_id, |
| acpi_tbl_entry_handler handler, |
| unsigned int max_entries) |
| { |
| struct acpi_subtable_proc proc = { |
| .id = entry_id, |
| .handler = handler, |
| }; |
| |
| return acpi_table_parse_entries_array(id, table_size, &proc, 1, |
| max_entries); |
| } |
| |
| int __init |
| acpi_table_parse_madt(enum acpi_madt_type id, |
| acpi_tbl_entry_handler handler, unsigned int max_entries) |
| { |
| return acpi_table_parse_entries(ACPI_SIG_MADT, |
| sizeof(struct acpi_table_madt), id, |
| handler, max_entries); |
| } |
| |
| /** |
| * acpi_table_parse - find table with @id, run @handler on it |
| * @id: table id to find |
| * @handler: handler to run |
| * |
| * Scan the ACPI System Descriptor Table (STD) for a table matching @id, |
| * run @handler on it. |
| * |
| * Return 0 if table found, -errno if not. |
| */ |
| int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler) |
| { |
| struct acpi_table_header *table = NULL; |
| |
| if (acpi_disabled) |
| return -ENODEV; |
| |
| if (!id || !handler) |
| return -EINVAL; |
| |
| if (strncmp(id, ACPI_SIG_MADT, 4) == 0) |
| acpi_get_table(id, acpi_apic_instance, &table); |
| else |
| acpi_get_table(id, 0, &table); |
| |
| if (table) { |
| handler(table); |
| acpi_put_table(table); |
| return 0; |
| } else |
| return -ENODEV; |
| } |
| |
| /* |
| * The BIOS is supposed to supply a single APIC/MADT, |
| * but some report two. Provide a knob to use either. |
| * (don't you wish instance 0 and 1 were not the same?) |
| */ |
| static void __init check_multiple_madt(void) |
| { |
| struct acpi_table_header *table = NULL; |
| |
| acpi_get_table(ACPI_SIG_MADT, 2, &table); |
| if (table) { |
| pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n", |
| acpi_apic_instance); |
| pr_warn("If \"acpi_apic_instance=%d\" works better, " |
| "notify linux-acpi@vger.kernel.org\n", |
| acpi_apic_instance ? 0 : 2); |
| acpi_put_table(table); |
| |
| } else |
| acpi_apic_instance = 0; |
| |
| return; |
| } |
| |
| static void acpi_table_taint(struct acpi_table_header *table) |
| { |
| pr_warn("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_TABLE_UPGRADE |
| 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, ACPI_SIG_IORT, |
| ACPI_SIG_NFIT, ACPI_SIG_HMAT, NULL }; |
| |
| #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
| |
| #define NR_ACPI_INITRD_TABLES 64 |
| static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES]; |
| static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES); |
| |
| #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) |
| |
| void __init acpi_table_upgrade(void) |
| { |
| void *data = (void *)initrd_start; |
| size_t size = initrd_end - initrd_start; |
| 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 < NR_ACPI_INITRD_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, ACPI_TABLE_UPGRADE_MAX_PHYS, |
| 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__range_add (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_memremap(dest_addr & PAGE_MASK, |
| clen + slop); |
| memcpy(dest_p + slop, src_p, clen); |
| early_memunmap(dest_p, clen + slop); |
| src_p += clen; |
| dest_addr += clen; |
| size -= clen; |
| } |
| } |
| } |
| |
| static acpi_status |
| acpi_table_initrd_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 (memcmp(existing_table->signature, table->signature, 4) || |
| memcmp(table->oem_id, existing_table->oem_id, |
| ACPI_OEM_ID_SIZE) || |
| 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; |
| } |
| /* |
| * Mark the table to avoid being used in |
| * acpi_table_initrd_scan() and check the revision. |
| */ |
| if (test_and_set_bit(table_index, acpi_initrd_installed) || |
| existing_table->oem_revision >= table->oem_revision) { |
| acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| goto next_table; |
| } |
| |
| *length = table_length; |
| *address = acpi_tables_addr + table_offset; |
| pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n", |
| table->signature, table->oem_id, |
| table->oem_table_id); |
| acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| break; |
| |
| next_table: |
| table_offset += table_length; |
| table_index++; |
| } |
| return AE_OK; |
| } |
| |
| static void __init acpi_table_initrd_scan(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 (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; |
| } |
| /* |
| * Mark the table to avoid being used in |
| * acpi_table_initrd_override(). Though this is not possible |
| * because override is disabled in acpi_install_table(). |
| */ |
| if (test_and_set_bit(table_index, acpi_initrd_installed)) { |
| acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| goto next_table; |
| } |
| |
| pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n", |
| table->signature, table->oem_id, |
| table->oem_table_id); |
| acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| acpi_install_table(acpi_tables_addr + table_offset, TRUE); |
| next_table: |
| table_offset += table_length; |
| table_index++; |
| } |
| } |
| #else |
| static acpi_status |
| acpi_table_initrd_override(struct acpi_table_header *existing_table, |
| acpi_physical_address *address, |
| u32 *table_length) |
| { |
| *table_length = 0; |
| *address = 0; |
| return AE_OK; |
| } |
| |
| static void __init acpi_table_initrd_scan(void) |
| { |
| } |
| #endif /* CONFIG_ACPI_TABLE_UPGRADE */ |
| |
| acpi_status |
| acpi_os_physical_table_override(struct acpi_table_header *existing_table, |
| acpi_physical_address *address, |
| u32 *table_length) |
| { |
| return acpi_table_initrd_override(existing_table, address, |
| table_length); |
| } |
| |
| 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; |
| } |
| |
| /* |
| * acpi_table_init() |
| * |
| * find RSDP, find and checksum SDT/XSDT. |
| * checksum all tables, print SDT/XSDT |
| * |
| * result: sdt_entry[] is initialized |
| */ |
| |
| int __init acpi_table_init(void) |
| { |
| acpi_status status; |
| |
| if (acpi_verify_table_checksum) { |
| pr_info("Early table checksum verification enabled\n"); |
| acpi_gbl_enable_table_validation = TRUE; |
| } else { |
| pr_info("Early table checksum verification disabled\n"); |
| acpi_gbl_enable_table_validation = FALSE; |
| } |
| |
| status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0); |
| if (ACPI_FAILURE(status)) |
| return -EINVAL; |
| acpi_table_initrd_scan(); |
| |
| check_multiple_madt(); |
| return 0; |
| } |
| |
| static int __init acpi_parse_apic_instance(char *str) |
| { |
| if (!str) |
| return -EINVAL; |
| |
| if (kstrtoint(str, 0, &acpi_apic_instance)) |
| return -EINVAL; |
| |
| pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance); |
| |
| return 0; |
| } |
| |
| early_param("acpi_apic_instance", acpi_parse_apic_instance); |
| |
| static int __init acpi_force_table_verification_setup(char *s) |
| { |
| acpi_verify_table_checksum = true; |
| |
| return 0; |
| } |
| |
| early_param("acpi_force_table_verification", acpi_force_table_verification_setup); |
| |
| static int __init acpi_force_32bit_fadt_addr(char *s) |
| { |
| pr_info("Forcing 32 Bit FADT addresses\n"); |
| acpi_gbl_use32_bit_fadt_addresses = TRUE; |
| |
| return 0; |
| } |
| |
| early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr); |