diff options
Diffstat (limited to 'kernel/drivers/acpi/osl.c')
| -rw-r--r-- | kernel/drivers/acpi/osl.c | 1914 |
1 files changed, 1914 insertions, 0 deletions
diff --git a/kernel/drivers/acpi/osl.c b/kernel/drivers/acpi/osl.c new file mode 100644 index 000000000..5226a8b92 --- /dev/null +++ b/kernel/drivers/acpi/osl.c @@ -0,0 +1,1914 @@ +/* + * 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; +} |