--- /dev/null
+/*
+ * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
+ *
+ * Copyright (C) 2000 Andrew Henroid
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ * Copyright (c) 2008 Intel Corporation
+ * Author: Matthew Wilcox <willy@linux.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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/kmod.h>
+#include <linux/delay.h>
+#include <linux/workqueue.h>
+#include <linux/nmi.h>
+#include <linux/acpi.h>
+#include <linux/efi.h>
+#include <linux/ioport.h>
+#include <linux/list.h>
+#include <linux/jiffies.h>
+#include <linux/semaphore.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include "internal.h"
+
+#define _COMPONENT ACPI_OS_SERVICES
+ACPI_MODULE_NAME("osl");
+
+struct acpi_os_dpc {
+ acpi_osd_exec_callback function;
+ void *context;
+ struct work_struct work;
+};
+
+#ifdef CONFIG_ACPI_CUSTOM_DSDT
+#include CONFIG_ACPI_CUSTOM_DSDT_FILE
+#endif
+
+#ifdef ENABLE_DEBUGGER
+#include <linux/kdb.h>
+
+/* stuff for debugger support */
+int acpi_in_debugger;
+EXPORT_SYMBOL(acpi_in_debugger);
+
+extern char line_buf[80];
+#endif /*ENABLE_DEBUGGER */
+
+static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
+ u32 pm1b_ctrl);
+static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
+ u32 val_b);
+
+static acpi_osd_handler acpi_irq_handler;
+static void *acpi_irq_context;
+static struct workqueue_struct *kacpid_wq;
+static struct workqueue_struct *kacpi_notify_wq;
+static struct workqueue_struct *kacpi_hotplug_wq;
+
+/*
+ * This list of permanent mappings is for memory that may be accessed from
+ * interrupt context, where we can't do the ioremap().
+ */
+struct acpi_ioremap {
+ struct list_head list;
+ void __iomem *virt;
+ acpi_physical_address phys;
+ acpi_size size;
+ unsigned long refcount;
+};
+
+static LIST_HEAD(acpi_ioremaps);
+static DEFINE_MUTEX(acpi_ioremap_lock);
+
+static void __init acpi_osi_setup_late(void);
+
+/*
+ * The story of _OSI(Linux)
+ *
+ * From pre-history through Linux-2.6.22,
+ * Linux responded TRUE upon a BIOS OSI(Linux) query.
+ *
+ * Unfortunately, reference BIOS writers got wind of this
+ * and put OSI(Linux) in their example code, quickly exposing
+ * this string as ill-conceived and opening the door to
+ * an un-bounded number of BIOS incompatibilities.
+ *
+ * For example, OSI(Linux) was used on resume to re-POST a
+ * video card on one system, because Linux at that time
+ * could not do a speedy restore in its native driver.
+ * But then upon gaining quick native restore capability,
+ * Linux has no way to tell the BIOS to skip the time-consuming
+ * POST -- putting Linux at a permanent performance disadvantage.
+ * On another system, the BIOS writer used OSI(Linux)
+ * to infer native OS support for IPMI! On other systems,
+ * OSI(Linux) simply got in the way of Linux claiming to
+ * be compatible with other operating systems, exposing
+ * BIOS issues such as skipped device initialization.
+ *
+ * So "Linux" turned out to be a really poor chose of
+ * OSI string, and from Linux-2.6.23 onward we respond FALSE.
+ *
+ * BIOS writers should NOT query _OSI(Linux) on future systems.
+ * Linux will complain on the console when it sees it, and return FALSE.
+ * To get Linux to return TRUE for your system will require
+ * a kernel source update to add a DMI entry,
+ * or boot with "acpi_osi=Linux"
+ */
+
+static struct osi_linux {
+ unsigned int enable:1;
+ unsigned int dmi:1;
+ unsigned int cmdline:1;
+ unsigned int default_disabling:1;
+} osi_linux = {0, 0, 0, 0};
+
+static u32 acpi_osi_handler(acpi_string interface, u32 supported)
+{
+ if (!strcmp("Linux", interface)) {
+
+ printk_once(KERN_NOTICE FW_BUG PREFIX
+ "BIOS _OSI(Linux) query %s%s\n",
+ osi_linux.enable ? "honored" : "ignored",
+ osi_linux.cmdline ? " via cmdline" :
+ osi_linux.dmi ? " via DMI" : "");
+ }
+
+ if (!strcmp("Darwin", interface)) {
+ /*
+ * Apple firmware will behave poorly if it receives positive
+ * answers to "Darwin" and any other OS. Respond positively
+ * to Darwin and then disable all other vendor strings.
+ */
+ acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
+ supported = ACPI_UINT32_MAX;
+ }
+
+ return supported;
+}
+
+static void __init acpi_request_region (struct acpi_generic_address *gas,
+ unsigned int length, char *desc)
+{
+ u64 addr;
+
+ /* Handle possible alignment issues */
+ memcpy(&addr, &gas->address, sizeof(addr));
+ if (!addr || !length)
+ return;
+
+ acpi_reserve_region(addr, length, gas->space_id, 0, desc);
+}
+
+static void __init acpi_reserve_resources(void)
+{
+ acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
+ "ACPI PM1a_EVT_BLK");
+
+ acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
+ "ACPI PM1b_EVT_BLK");
+
+ acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
+ "ACPI PM1a_CNT_BLK");
+
+ acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
+ "ACPI PM1b_CNT_BLK");
+
+ if (acpi_gbl_FADT.pm_timer_length == 4)
+ acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
+
+ acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
+ "ACPI PM2_CNT_BLK");
+
+ /* Length of GPE blocks must be a non-negative multiple of 2 */
+
+ if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
+ acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
+ acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
+
+ if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
+ acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
+ acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
+}
+
+void acpi_os_printf(const char *fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ acpi_os_vprintf(fmt, args);
+ va_end(args);
+}
+
+void acpi_os_vprintf(const char *fmt, va_list args)
+{
+ static char buffer[512];
+
+ vsprintf(buffer, fmt, args);
+
+#ifdef ENABLE_DEBUGGER
+ if (acpi_in_debugger) {
+ kdb_printf("%s", buffer);
+ } else {
+ printk(KERN_CONT "%s", buffer);
+ }
+#else
+ printk(KERN_CONT "%s", buffer);
+#endif
+}
+
+#ifdef CONFIG_KEXEC
+static unsigned long acpi_rsdp;
+static int __init setup_acpi_rsdp(char *arg)
+{
+ if (kstrtoul(arg, 16, &acpi_rsdp))
+ return -EINVAL;
+ return 0;
+}
+early_param("acpi_rsdp", setup_acpi_rsdp);
+#endif
+
+acpi_physical_address __init acpi_os_get_root_pointer(void)
+{
+#ifdef CONFIG_KEXEC
+ if (acpi_rsdp)
+ return acpi_rsdp;
+#endif
+
+ if (efi_enabled(EFI_CONFIG_TABLES)) {
+ if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
+ return efi.acpi20;
+ else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
+ return efi.acpi;
+ else {
+ printk(KERN_ERR PREFIX
+ "System description tables not found\n");
+ return 0;
+ }
+ } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
+ acpi_physical_address pa = 0;
+
+ acpi_find_root_pointer(&pa);
+ return pa;
+ }
+
+ return 0;
+}
+
+/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
+static struct acpi_ioremap *
+acpi_map_lookup(acpi_physical_address phys, acpi_size size)
+{
+ struct acpi_ioremap *map;
+
+ list_for_each_entry_rcu(map, &acpi_ioremaps, list)
+ if (map->phys <= phys &&
+ phys + size <= map->phys + map->size)
+ return map;
+
+ return NULL;
+}
+
+/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
+static void __iomem *
+acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
+{
+ struct acpi_ioremap *map;
+
+ map = acpi_map_lookup(phys, size);
+ if (map)
+ return map->virt + (phys - map->phys);
+
+ return NULL;
+}
+
+void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
+{
+ struct acpi_ioremap *map;
+ void __iomem *virt = NULL;
+
+ mutex_lock(&acpi_ioremap_lock);
+ map = acpi_map_lookup(phys, size);
+ if (map) {
+ virt = map->virt + (phys - map->phys);
+ map->refcount++;
+ }
+ mutex_unlock(&acpi_ioremap_lock);
+ return virt;
+}
+EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
+
+/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
+static struct acpi_ioremap *
+acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
+{
+ struct acpi_ioremap *map;
+
+ list_for_each_entry_rcu(map, &acpi_ioremaps, list)
+ if (map->virt <= virt &&
+ virt + size <= map->virt + map->size)
+ return map;
+
+ return NULL;
+}
+
+#if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
+/* ioremap will take care of cache attributes */
+#define should_use_kmap(pfn) 0
+#else
+#define should_use_kmap(pfn) page_is_ram(pfn)
+#endif
+
+static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
+{
+ unsigned long pfn;
+
+ pfn = pg_off >> PAGE_SHIFT;
+ if (should_use_kmap(pfn)) {
+ if (pg_sz > PAGE_SIZE)
+ return NULL;
+ return (void __iomem __force *)kmap(pfn_to_page(pfn));
+ } else
+ return acpi_os_ioremap(pg_off, pg_sz);
+}
+
+static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
+{
+ unsigned long pfn;
+
+ pfn = pg_off >> PAGE_SHIFT;
+ if (should_use_kmap(pfn))
+ kunmap(pfn_to_page(pfn));
+ else
+ iounmap(vaddr);
+}
+
+void __iomem *__init_refok
+acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
+{
+ struct acpi_ioremap *map;
+ void __iomem *virt;
+ acpi_physical_address pg_off;
+ acpi_size pg_sz;
+
+ if (phys > ULONG_MAX) {
+ printk(KERN_ERR PREFIX "Cannot map memory that high\n");
+ return NULL;
+ }
+
+ if (!acpi_gbl_permanent_mmap)
+ return __acpi_map_table((unsigned long)phys, size);
+
+ mutex_lock(&acpi_ioremap_lock);
+ /* Check if there's a suitable mapping already. */
+ map = acpi_map_lookup(phys, size);
+ if (map) {
+ map->refcount++;
+ goto out;
+ }
+
+ map = kzalloc(sizeof(*map), GFP_KERNEL);
+ if (!map) {
+ mutex_unlock(&acpi_ioremap_lock);
+ return NULL;
+ }
+
+ pg_off = round_down(phys, PAGE_SIZE);
+ pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
+ virt = acpi_map(pg_off, pg_sz);
+ if (!virt) {
+ mutex_unlock(&acpi_ioremap_lock);
+ kfree(map);
+ return NULL;
+ }
+
+ INIT_LIST_HEAD(&map->list);
+ map->virt = virt;
+ map->phys = pg_off;
+ map->size = pg_sz;
+ map->refcount = 1;
+
+ list_add_tail_rcu(&map->list, &acpi_ioremaps);
+
+out:
+ mutex_unlock(&acpi_ioremap_lock);
+ return map->virt + (phys - map->phys);
+}
+EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
+
+void *__init_refok
+acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
+{
+ return (void *)acpi_os_map_iomem(phys, size);
+}
+EXPORT_SYMBOL_GPL(acpi_os_map_memory);
+
+static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
+{
+ if (!--map->refcount)
+ list_del_rcu(&map->list);
+}
+
+static void acpi_os_map_cleanup(struct acpi_ioremap *map)
+{
+ if (!map->refcount) {
+ synchronize_rcu_expedited();
+ acpi_unmap(map->phys, map->virt);
+ kfree(map);
+ }
+}
+
+void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
+{
+ struct acpi_ioremap *map;
+
+ if (!acpi_gbl_permanent_mmap) {
+ __acpi_unmap_table(virt, size);
+ return;
+ }
+
+ mutex_lock(&acpi_ioremap_lock);
+ map = acpi_map_lookup_virt(virt, size);
+ if (!map) {
+ mutex_unlock(&acpi_ioremap_lock);
+ WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
+ return;
+ }
+ acpi_os_drop_map_ref(map);
+ mutex_unlock(&acpi_ioremap_lock);
+
+ acpi_os_map_cleanup(map);
+}
+EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
+
+void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
+{
+ return acpi_os_unmap_iomem((void __iomem *)virt, size);
+}
+EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
+
+void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
+{
+ if (!acpi_gbl_permanent_mmap)
+ __acpi_unmap_table(virt, size);
+}
+
+int acpi_os_map_generic_address(struct acpi_generic_address *gas)
+{
+ u64 addr;
+ void __iomem *virt;
+
+ if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ return 0;
+
+ /* Handle possible alignment issues */
+ memcpy(&addr, &gas->address, sizeof(addr));
+ if (!addr || !gas->bit_width)
+ return -EINVAL;
+
+ virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
+ if (!virt)
+ return -EIO;
+
+ return 0;
+}
+EXPORT_SYMBOL(acpi_os_map_generic_address);
+
+void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
+{
+ u64 addr;
+ struct acpi_ioremap *map;
+
+ if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
+ return;
+
+ /* Handle possible alignment issues */
+ memcpy(&addr, &gas->address, sizeof(addr));
+ if (!addr || !gas->bit_width)
+ return;
+
+ mutex_lock(&acpi_ioremap_lock);
+ map = acpi_map_lookup(addr, gas->bit_width / 8);
+ if (!map) {
+ mutex_unlock(&acpi_ioremap_lock);
+ return;
+ }
+ acpi_os_drop_map_ref(map);
+ mutex_unlock(&acpi_ioremap_lock);
+
+ acpi_os_map_cleanup(map);
+}
+EXPORT_SYMBOL(acpi_os_unmap_generic_address);
+
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
+{
+ if (!phys || !virt)
+ return AE_BAD_PARAMETER;
+
+ *phys = virt_to_phys(virt);
+
+ return AE_OK;
+}
+#endif
+
+#define ACPI_MAX_OVERRIDE_LEN 100
+
+static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
+
+acpi_status
+acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
+ acpi_string * new_val)
+{
+ if (!init_val || !new_val)
+ return AE_BAD_PARAMETER;
+
+ *new_val = NULL;
+ if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
+ printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
+ acpi_os_name);
+ *new_val = acpi_os_name;
+ }
+
+ return AE_OK;
+}
+
+#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];
+
+#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;
+ }
+ }
+}
+#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
+
+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);
+}
+
+
+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_status
+acpi_os_physical_table_override(struct acpi_table_header *existing_table,
+ acpi_physical_address *address,
+ u32 *table_length)
+{
+#ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
+ *table_length = 0;
+ *address = 0;
+ return AE_OK;
+#else
+ int table_offset = 0;
+ struct acpi_table_header *table;
+
+ *table_length = 0;
+ *address = 0;
+
+ if (!acpi_tables_addr)
+ return AE_OK;
+
+ do {
+ if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
+ WARN_ON(1);
+ return AE_OK;
+ }
+
+ 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_offset += table->length;
+
+ if (memcmp(existing_table->signature, table->signature, 4)) {
+ acpi_os_unmap_memory(table,
+ ACPI_HEADER_SIZE);
+ continue;
+ }
+
+ /* Only override tables with matching oem id */
+ if (memcmp(table->oem_table_id, existing_table->oem_table_id,
+ ACPI_OEM_TABLE_ID_SIZE)) {
+ acpi_os_unmap_memory(table,
+ ACPI_HEADER_SIZE);
+ continue;
+ }
+
+ table_offset -= table->length;
+ *table_length = table->length;
+ acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
+ *address = acpi_tables_addr + table_offset;
+ break;
+ } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
+
+ if (*address != 0)
+ acpi_table_taint(existing_table);
+ return AE_OK;
+#endif
+}
+
+static irqreturn_t acpi_irq(int irq, void *dev_id)
+{
+ u32 handled;
+
+ handled = (*acpi_irq_handler) (acpi_irq_context);
+
+ if (handled) {
+ acpi_irq_handled++;
+ return IRQ_HANDLED;
+ } else {
+ acpi_irq_not_handled++;
+ return IRQ_NONE;
+ }
+}
+
+acpi_status
+acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
+ void *context)
+{
+ unsigned int irq;
+
+ acpi_irq_stats_init();
+
+ /*
+ * ACPI interrupts different from the SCI in our copy of the FADT are
+ * not supported.
+ */
+ if (gsi != acpi_gbl_FADT.sci_interrupt)
+ return AE_BAD_PARAMETER;
+
+ if (acpi_irq_handler)
+ return AE_ALREADY_ACQUIRED;
+
+ if (acpi_gsi_to_irq(gsi, &irq) < 0) {
+ printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
+ gsi);
+ return AE_OK;
+ }
+
+ acpi_irq_handler = handler;
+ acpi_irq_context = context;
+ if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
+ printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
+ acpi_irq_handler = NULL;
+ return AE_NOT_ACQUIRED;
+ }
+
+ return AE_OK;
+}
+
+acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
+{
+ if (irq != acpi_gbl_FADT.sci_interrupt)
+ return AE_BAD_PARAMETER;
+
+ free_irq(irq, acpi_irq);
+ acpi_irq_handler = NULL;
+
+ return AE_OK;
+}
+
+/*
+ * Running in interpreter thread context, safe to sleep
+ */
+
+void acpi_os_sleep(u64 ms)
+{
+ msleep(ms);
+}
+
+void acpi_os_stall(u32 us)
+{
+ while (us) {
+ u32 delay = 1000;
+
+ if (delay > us)
+ delay = us;
+ udelay(delay);
+ touch_nmi_watchdog();
+ us -= delay;
+ }
+}
+
+/*
+ * Support ACPI 3.0 AML Timer operand
+ * Returns 64-bit free-running, monotonically increasing timer
+ * with 100ns granularity
+ */
+u64 acpi_os_get_timer(void)
+{
+ u64 time_ns = ktime_to_ns(ktime_get());
+ do_div(time_ns, 100);
+ return time_ns;
+}
+
+acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
+{
+ u32 dummy;
+
+ if (!value)
+ value = &dummy;
+
+ *value = 0;
+ if (width <= 8) {
+ *(u8 *) value = inb(port);
+ } else if (width <= 16) {
+ *(u16 *) value = inw(port);
+ } else if (width <= 32) {
+ *(u32 *) value = inl(port);
+ } else {
+ BUG();
+ }
+
+ return AE_OK;
+}
+
+EXPORT_SYMBOL(acpi_os_read_port);
+
+acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
+{
+ if (width <= 8) {
+ outb(value, port);
+ } else if (width <= 16) {
+ outw(value, port);
+ } else if (width <= 32) {
+ outl(value, port);
+ } else {
+ BUG();
+ }
+
+ return AE_OK;
+}
+
+EXPORT_SYMBOL(acpi_os_write_port);
+
+#ifdef readq
+static inline u64 read64(const volatile void __iomem *addr)
+{
+ return readq(addr);
+}
+#else
+static inline u64 read64(const volatile void __iomem *addr)
+{
+ u64 l, h;
+ l = readl(addr);
+ h = readl(addr+4);
+ return l | (h << 32);
+}
+#endif
+
+acpi_status
+acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
+{
+ void __iomem *virt_addr;
+ unsigned int size = width / 8;
+ bool unmap = false;
+ u64 dummy;
+
+ rcu_read_lock();
+ virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
+ if (!virt_addr) {
+ rcu_read_unlock();
+ virt_addr = acpi_os_ioremap(phys_addr, size);
+ if (!virt_addr)
+ return AE_BAD_ADDRESS;
+ unmap = true;
+ }
+
+ if (!value)
+ value = &dummy;
+
+ switch (width) {
+ case 8:
+ *(u8 *) value = readb(virt_addr);
+ break;
+ case 16:
+ *(u16 *) value = readw(virt_addr);
+ break;
+ case 32:
+ *(u32 *) value = readl(virt_addr);
+ break;
+ case 64:
+ *(u64 *) value = read64(virt_addr);
+ break;
+ default:
+ BUG();
+ }
+
+ if (unmap)
+ iounmap(virt_addr);
+ else
+ rcu_read_unlock();
+
+ return AE_OK;
+}
+
+#ifdef writeq
+static inline void write64(u64 val, volatile void __iomem *addr)
+{
+ writeq(val, addr);
+}
+#else
+static inline void write64(u64 val, volatile void __iomem *addr)
+{
+ writel(val, addr);
+ writel(val>>32, addr+4);
+}
+#endif
+
+acpi_status
+acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
+{
+ void __iomem *virt_addr;
+ unsigned int size = width / 8;
+ bool unmap = false;
+
+ rcu_read_lock();
+ virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
+ if (!virt_addr) {
+ rcu_read_unlock();
+ virt_addr = acpi_os_ioremap(phys_addr, size);
+ if (!virt_addr)
+ return AE_BAD_ADDRESS;
+ unmap = true;
+ }
+
+ switch (width) {
+ case 8:
+ writeb(value, virt_addr);
+ break;
+ case 16:
+ writew(value, virt_addr);
+ break;
+ case 32:
+ writel(value, virt_addr);
+ break;
+ case 64:
+ write64(value, virt_addr);
+ break;
+ default:
+ BUG();
+ }
+
+ if (unmap)
+ iounmap(virt_addr);
+ else
+ rcu_read_unlock();
+
+ return AE_OK;
+}
+
+acpi_status
+acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
+ u64 *value, u32 width)
+{
+ int result, size;
+ u32 value32;
+
+ if (!value)
+ return AE_BAD_PARAMETER;
+
+ switch (width) {
+ case 8:
+ size = 1;
+ break;
+ case 16:
+ size = 2;
+ break;
+ case 32:
+ size = 4;
+ break;
+ default:
+ return AE_ERROR;
+ }
+
+ result = raw_pci_read(pci_id->segment, pci_id->bus,
+ PCI_DEVFN(pci_id->device, pci_id->function),
+ reg, size, &value32);
+ *value = value32;
+
+ return (result ? AE_ERROR : AE_OK);
+}
+
+acpi_status
+acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
+ u64 value, u32 width)
+{
+ int result, size;
+
+ switch (width) {
+ case 8:
+ size = 1;
+ break;
+ case 16:
+ size = 2;
+ break;
+ case 32:
+ size = 4;
+ break;
+ default:
+ return AE_ERROR;
+ }
+
+ result = raw_pci_write(pci_id->segment, pci_id->bus,
+ PCI_DEVFN(pci_id->device, pci_id->function),
+ reg, size, value);
+
+ return (result ? AE_ERROR : AE_OK);
+}
+
+static void acpi_os_execute_deferred(struct work_struct *work)
+{
+ struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
+
+ dpc->function(dpc->context);
+ kfree(dpc);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_os_execute
+ *
+ * PARAMETERS: Type - Type of the callback
+ * Function - Function to be executed
+ * Context - Function parameters
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Depending on type, either queues function for deferred execution or
+ * immediately executes function on a separate thread.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_execute(acpi_execute_type type,
+ acpi_osd_exec_callback function, void *context)
+{
+ acpi_status status = AE_OK;
+ struct acpi_os_dpc *dpc;
+ struct workqueue_struct *queue;
+ int ret;
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Scheduling function [%p(%p)] for deferred execution.\n",
+ function, context));
+
+ /*
+ * Allocate/initialize DPC structure. Note that this memory will be
+ * freed by the callee. The kernel handles the work_struct list in a
+ * way that allows us to also free its memory inside the callee.
+ * Because we may want to schedule several tasks with different
+ * parameters we can't use the approach some kernel code uses of
+ * having a static work_struct.
+ */
+
+ dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
+ if (!dpc)
+ return AE_NO_MEMORY;
+
+ dpc->function = function;
+ dpc->context = context;
+
+ /*
+ * To prevent lockdep from complaining unnecessarily, make sure that
+ * there is a different static lockdep key for each workqueue by using
+ * INIT_WORK() for each of them separately.
+ */
+ if (type == OSL_NOTIFY_HANDLER) {
+ queue = kacpi_notify_wq;
+ INIT_WORK(&dpc->work, acpi_os_execute_deferred);
+ } else {
+ queue = kacpid_wq;
+ INIT_WORK(&dpc->work, acpi_os_execute_deferred);
+ }
+
+ /*
+ * On some machines, a software-initiated SMI causes corruption unless
+ * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
+ * typically it's done in GPE-related methods that are run via
+ * workqueues, so we can avoid the known corruption cases by always
+ * queueing on CPU 0.
+ */
+ ret = queue_work_on(0, queue, &dpc->work);
+
+ if (!ret) {
+ printk(KERN_ERR PREFIX
+ "Call to queue_work() failed.\n");
+ status = AE_ERROR;
+ kfree(dpc);
+ }
+ return status;
+}
+EXPORT_SYMBOL(acpi_os_execute);
+
+void acpi_os_wait_events_complete(void)
+{
+ /*
+ * Make sure the GPE handler or the fixed event handler is not used
+ * on another CPU after removal.
+ */
+ if (acpi_irq_handler)
+ synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
+ flush_workqueue(kacpid_wq);
+ flush_workqueue(kacpi_notify_wq);
+}
+
+struct acpi_hp_work {
+ struct work_struct work;
+ struct acpi_device *adev;
+ u32 src;
+};
+
+static void acpi_hotplug_work_fn(struct work_struct *work)
+{
+ struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
+
+ acpi_os_wait_events_complete();
+ acpi_device_hotplug(hpw->adev, hpw->src);
+ kfree(hpw);
+}
+
+acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
+{
+ struct acpi_hp_work *hpw;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Scheduling hotplug event (%p, %u) for deferred execution.\n",
+ adev, src));
+
+ hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
+ if (!hpw)
+ return AE_NO_MEMORY;
+
+ INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
+ hpw->adev = adev;
+ hpw->src = src;
+ /*
+ * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
+ * the hotplug code may call driver .remove() functions, which may
+ * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
+ * these workqueues.
+ */
+ if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
+ kfree(hpw);
+ return AE_ERROR;
+ }
+ return AE_OK;
+}
+
+bool acpi_queue_hotplug_work(struct work_struct *work)
+{
+ return queue_work(kacpi_hotplug_wq, work);
+}
+
+acpi_status
+acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
+{
+ struct semaphore *sem = NULL;
+
+ sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
+ if (!sem)
+ return AE_NO_MEMORY;
+
+ sema_init(sem, initial_units);
+
+ *handle = (acpi_handle *) sem;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
+ *handle, initial_units));
+
+ return AE_OK;
+}
+
+/*
+ * TODO: A better way to delete semaphores? Linux doesn't have a
+ * 'delete_semaphore()' function -- may result in an invalid
+ * pointer dereference for non-synchronized consumers. Should
+ * we at least check for blocked threads and signal/cancel them?
+ */
+
+acpi_status acpi_os_delete_semaphore(acpi_handle handle)
+{
+ struct semaphore *sem = (struct semaphore *)handle;
+
+ if (!sem)
+ return AE_BAD_PARAMETER;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
+
+ BUG_ON(!list_empty(&sem->wait_list));
+ kfree(sem);
+ sem = NULL;
+
+ return AE_OK;
+}
+
+/*
+ * TODO: Support for units > 1?
+ */
+acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
+{
+ acpi_status status = AE_OK;
+ struct semaphore *sem = (struct semaphore *)handle;
+ long jiffies;
+ int ret = 0;
+
+ if (!sem || (units < 1))
+ return AE_BAD_PARAMETER;
+
+ if (units > 1)
+ return AE_SUPPORT;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
+ handle, units, timeout));
+
+ if (timeout == ACPI_WAIT_FOREVER)
+ jiffies = MAX_SCHEDULE_TIMEOUT;
+ else
+ jiffies = msecs_to_jiffies(timeout);
+
+ ret = down_timeout(sem, jiffies);
+ if (ret)
+ status = AE_TIME;
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
+ "Failed to acquire semaphore[%p|%d|%d], %s",
+ handle, units, timeout,
+ acpi_format_exception(status)));
+ } else {
+ ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
+ "Acquired semaphore[%p|%d|%d]", handle,
+ units, timeout));
+ }
+
+ return status;
+}
+
+/*
+ * TODO: Support for units > 1?
+ */
+acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
+{
+ struct semaphore *sem = (struct semaphore *)handle;
+
+ if (!sem || (units < 1))
+ return AE_BAD_PARAMETER;
+
+ if (units > 1)
+ return AE_SUPPORT;
+
+ ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
+ units));
+
+ up(sem);
+
+ return AE_OK;
+}
+
+#ifdef ACPI_FUTURE_USAGE
+u32 acpi_os_get_line(char *buffer)
+{
+
+#ifdef ENABLE_DEBUGGER
+ if (acpi_in_debugger) {
+ u32 chars;
+
+ kdb_read(buffer, sizeof(line_buf));
+
+ /* remove the CR kdb includes */
+ chars = strlen(buffer) - 1;
+ buffer[chars] = '\0';
+ }
+#endif
+
+ return 0;
+}
+#endif /* ACPI_FUTURE_USAGE */
+
+acpi_status acpi_os_signal(u32 function, void *info)
+{
+ switch (function) {
+ case ACPI_SIGNAL_FATAL:
+ printk(KERN_ERR PREFIX "Fatal opcode executed\n");
+ break;
+ case ACPI_SIGNAL_BREAKPOINT:
+ /*
+ * AML Breakpoint
+ * ACPI spec. says to treat it as a NOP unless
+ * you are debugging. So if/when we integrate
+ * AML debugger into the kernel debugger its
+ * hook will go here. But until then it is
+ * not useful to print anything on breakpoints.
+ */
+ break;
+ default:
+ break;
+ }
+
+ return AE_OK;
+}
+
+static int __init acpi_os_name_setup(char *str)
+{
+ char *p = acpi_os_name;
+ int count = ACPI_MAX_OVERRIDE_LEN - 1;
+
+ if (!str || !*str)
+ return 0;
+
+ for (; count-- && *str; str++) {
+ if (isalnum(*str) || *str == ' ' || *str == ':')
+ *p++ = *str;
+ else if (*str == '\'' || *str == '"')
+ continue;
+ else
+ break;
+ }
+ *p = 0;
+
+ return 1;
+
+}
+
+__setup("acpi_os_name=", acpi_os_name_setup);
+
+#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
+#define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
+
+struct osi_setup_entry {
+ char string[OSI_STRING_LENGTH_MAX];
+ bool enable;
+};
+
+static struct osi_setup_entry
+ osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
+ {"Module Device", true},
+ {"Processor Device", true},
+ {"3.0 _SCP Extensions", true},
+ {"Processor Aggregator Device", true},
+};
+
+void __init acpi_osi_setup(char *str)
+{
+ struct osi_setup_entry *osi;
+ bool enable = true;
+ int i;
+
+ if (!acpi_gbl_create_osi_method)
+ return;
+
+ if (str == NULL || *str == '\0') {
+ printk(KERN_INFO PREFIX "_OSI method disabled\n");
+ acpi_gbl_create_osi_method = FALSE;
+ return;
+ }
+
+ if (*str == '!') {
+ str++;
+ if (*str == '\0') {
+ osi_linux.default_disabling = 1;
+ return;
+ } else if (*str == '*') {
+ acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
+ for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
+ osi = &osi_setup_entries[i];
+ osi->enable = false;
+ }
+ return;
+ }
+ enable = false;
+ }
+
+ for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
+ osi = &osi_setup_entries[i];
+ if (!strcmp(osi->string, str)) {
+ osi->enable = enable;
+ break;
+ } else if (osi->string[0] == '\0') {
+ osi->enable = enable;
+ strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
+ break;
+ }
+ }
+}
+
+static void __init set_osi_linux(unsigned int enable)
+{
+ if (osi_linux.enable != enable)
+ osi_linux.enable = enable;
+
+ if (osi_linux.enable)
+ acpi_osi_setup("Linux");
+ else
+ acpi_osi_setup("!Linux");
+
+ return;
+}
+
+static void __init acpi_cmdline_osi_linux(unsigned int enable)
+{
+ osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
+ osi_linux.dmi = 0;
+ set_osi_linux(enable);
+
+ return;
+}
+
+void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
+{
+ printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
+
+ if (enable == -1)
+ return;
+
+ osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
+ set_osi_linux(enable);
+
+ return;
+}
+
+/*
+ * Modify the list of "OS Interfaces" reported to BIOS via _OSI
+ *
+ * empty string disables _OSI
+ * string starting with '!' disables that string
+ * otherwise string is added to list, augmenting built-in strings
+ */
+static void __init acpi_osi_setup_late(void)
+{
+ struct osi_setup_entry *osi;
+ char *str;
+ int i;
+ acpi_status status;
+
+ if (osi_linux.default_disabling) {
+ status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
+
+ if (ACPI_SUCCESS(status))
+ printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
+ }
+
+ for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
+ osi = &osi_setup_entries[i];
+ str = osi->string;
+
+ if (*str == '\0')
+ break;
+ if (osi->enable) {
+ status = acpi_install_interface(str);
+
+ if (ACPI_SUCCESS(status))
+ printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
+ } else {
+ status = acpi_remove_interface(str);
+
+ if (ACPI_SUCCESS(status))
+ printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
+ }
+ }
+}
+
+static int __init osi_setup(char *str)
+{
+ if (str && !strcmp("Linux", str))
+ acpi_cmdline_osi_linux(1);
+ else if (str && !strcmp("!Linux", str))
+ acpi_cmdline_osi_linux(0);
+ else
+ acpi_osi_setup(str);
+
+ return 1;
+}
+
+__setup("acpi_osi=", osi_setup);
+
+/*
+ * Disable the auto-serialization of named objects creation methods.
+ *
+ * This feature is enabled by default. It marks the AML control methods
+ * that contain the opcodes to create named objects as "Serialized".
+ */
+static int __init acpi_no_auto_serialize_setup(char *str)
+{
+ acpi_gbl_auto_serialize_methods = FALSE;
+ pr_info("ACPI: auto-serialization disabled\n");
+
+ return 1;
+}
+
+__setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
+
+/* Check of resource interference between native drivers and ACPI
+ * OperationRegions (SystemIO and System Memory only).
+ * IO ports and memory declared in ACPI might be used by the ACPI subsystem
+ * in arbitrary AML code and can interfere with legacy drivers.
+ * acpi_enforce_resources= can be set to:
+ *
+ * - strict (default) (2)
+ * -> further driver trying to access the resources will not load
+ * - lax (1)
+ * -> further driver trying to access the resources will load, but you
+ * get a system message that something might go wrong...
+ *
+ * - no (0)
+ * -> ACPI Operation Region resources will not be registered
+ *
+ */
+#define ENFORCE_RESOURCES_STRICT 2
+#define ENFORCE_RESOURCES_LAX 1
+#define ENFORCE_RESOURCES_NO 0
+
+static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
+
+static int __init acpi_enforce_resources_setup(char *str)
+{
+ if (str == NULL || *str == '\0')
+ return 0;
+
+ if (!strcmp("strict", str))
+ acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
+ else if (!strcmp("lax", str))
+ acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
+ else if (!strcmp("no", str))
+ acpi_enforce_resources = ENFORCE_RESOURCES_NO;
+
+ return 1;
+}
+
+__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
+
+/* Check for resource conflicts between ACPI OperationRegions and native
+ * drivers */
+int acpi_check_resource_conflict(const struct resource *res)
+{
+ acpi_adr_space_type space_id;
+ acpi_size length;
+ u8 warn = 0;
+ int clash = 0;
+
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
+ return 0;
+ if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
+ return 0;
+
+ if (res->flags & IORESOURCE_IO)
+ space_id = ACPI_ADR_SPACE_SYSTEM_IO;
+ else
+ space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
+
+ length = resource_size(res);
+ if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
+ warn = 1;
+ clash = acpi_check_address_range(space_id, res->start, length, warn);
+
+ if (clash) {
+ if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
+ printk(KERN_NOTICE "ACPI: This conflict may"
+ " cause random problems and system"
+ " instability\n");
+ printk(KERN_INFO "ACPI: If an ACPI driver is available"
+ " for this device, you should use it instead of"
+ " the native driver\n");
+ }
+ if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
+ return -EBUSY;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(acpi_check_resource_conflict);
+
+int acpi_check_region(resource_size_t start, resource_size_t n,
+ const char *name)
+{
+ struct resource res = {
+ .start = start,
+ .end = start + n - 1,
+ .name = name,
+ .flags = IORESOURCE_IO,
+ };
+
+ return acpi_check_resource_conflict(&res);
+}
+EXPORT_SYMBOL(acpi_check_region);
+
+/*
+ * Let drivers know whether the resource checks are effective
+ */
+int acpi_resources_are_enforced(void)
+{
+ return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
+}
+EXPORT_SYMBOL(acpi_resources_are_enforced);
+
+/*
+ * Deallocate the memory for a spinlock.
+ */
+void acpi_os_delete_lock(acpi_spinlock handle)
+{
+ ACPI_FREE(handle);
+}
+
+/*
+ * Acquire a spinlock.
+ *
+ * handle is a pointer to the spinlock_t.
+ */
+
+acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
+{
+ acpi_cpu_flags flags;
+ spin_lock_irqsave(lockp, flags);
+ return flags;
+}
+
+/*
+ * Release a spinlock. See above.
+ */
+
+void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
+{
+ spin_unlock_irqrestore(lockp, flags);
+}
+
+#ifndef ACPI_USE_LOCAL_CACHE
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_os_create_cache
+ *
+ * PARAMETERS: name - Ascii name for the cache
+ * size - Size of each cached object
+ * depth - Maximum depth of the cache (in objects) <ignored>
+ * cache - Where the new cache object is returned
+ *
+ * RETURN: status
+ *
+ * DESCRIPTION: Create a cache object
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
+{
+ *cache = kmem_cache_create(name, size, 0, 0, NULL);
+ if (*cache == NULL)
+ return AE_ERROR;
+ else
+ return AE_OK;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_os_purge_cache
+ *
+ * PARAMETERS: Cache - Handle to cache object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Free all objects within the requested cache.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
+{
+ kmem_cache_shrink(cache);
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_os_delete_cache
+ *
+ * PARAMETERS: Cache - Handle to cache object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Free all objects within the requested cache and delete the
+ * cache object.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
+{
+ kmem_cache_destroy(cache);
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_os_release_object
+ *
+ * PARAMETERS: Cache - Handle to cache object
+ * Object - The object to be released
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Release an object to the specified cache. If cache is full,
+ * the object is deleted.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
+{
+ kmem_cache_free(cache, object);
+ return (AE_OK);
+}
+#endif
+
+static int __init acpi_no_static_ssdt_setup(char *s)
+{
+ acpi_gbl_disable_ssdt_table_install = TRUE;
+ pr_info("ACPI: static SSDT installation disabled\n");
+
+ return 0;
+}
+
+early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
+
+static int __init acpi_disable_return_repair(char *s)
+{
+ printk(KERN_NOTICE PREFIX
+ "ACPI: Predefined validation mechanism disabled\n");
+ acpi_gbl_disable_auto_repair = TRUE;
+
+ return 1;
+}
+
+__setup("acpica_no_return_repair", acpi_disable_return_repair);
+
+acpi_status __init acpi_os_initialize(void)
+{
+ acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
+ acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
+ acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
+ acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
+ if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
+ /*
+ * Use acpi_os_map_generic_address to pre-map the reset
+ * register if it's in system memory.
+ */
+ int rv;
+
+ rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
+ pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
+ }
+
+ return AE_OK;
+}
+
+acpi_status __init acpi_os_initialize1(void)
+{
+ acpi_reserve_resources();
+ kacpid_wq = alloc_workqueue("kacpid", 0, 1);
+ kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
+ kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
+ BUG_ON(!kacpid_wq);
+ BUG_ON(!kacpi_notify_wq);
+ BUG_ON(!kacpi_hotplug_wq);
+ acpi_install_interface_handler(acpi_osi_handler);
+ acpi_osi_setup_late();
+ return AE_OK;
+}
+
+acpi_status acpi_os_terminate(void)
+{
+ if (acpi_irq_handler) {
+ acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
+ acpi_irq_handler);
+ }
+
+ acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
+ acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
+ acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
+ acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
+ if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
+ acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
+
+ destroy_workqueue(kacpid_wq);
+ destroy_workqueue(kacpi_notify_wq);
+ destroy_workqueue(kacpi_hotplug_wq);
+
+ return AE_OK;
+}
+
+acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
+ u32 pm1b_control)
+{
+ int rc = 0;
+ if (__acpi_os_prepare_sleep)
+ rc = __acpi_os_prepare_sleep(sleep_state,
+ pm1a_control, pm1b_control);
+ if (rc < 0)
+ return AE_ERROR;
+ else if (rc > 0)
+ return AE_CTRL_SKIP;
+
+ return AE_OK;
+}
+
+void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
+ u32 pm1a_ctrl, u32 pm1b_ctrl))
+{
+ __acpi_os_prepare_sleep = func;
+}
+
+acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
+ u32 val_b)
+{
+ int rc = 0;
+ if (__acpi_os_prepare_extended_sleep)
+ rc = __acpi_os_prepare_extended_sleep(sleep_state,
+ val_a, val_b);
+ if (rc < 0)
+ return AE_ERROR;
+ else if (rc > 0)
+ return AE_CTRL_SKIP;
+
+ return AE_OK;
+}
+
+void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
+ u32 val_a, u32 val_b))
+{
+ __acpi_os_prepare_extended_sleep = func;
+}
Code Review / kvmfornfv.git / blobdiff