diff options
Diffstat (limited to 'drivers/acpi/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 1770 |
1 files changed, 1770 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c new file mode 100644 index 000000000..3269a888f --- /dev/null +++ b/drivers/acpi/osl.c @@ -0,0 +1,1770 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * 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> + */ + +#define pr_fmt(fmt) "ACPI: OSL: " fmt + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/highmem.h> +#include <linux/lockdep.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 <linux/security.h> + +#include <asm/io.h> +#include <linux/uaccess.h> +#include <linux/io-64-nonatomic-lo-hi.h> + +#include "acpica/accommon.h" +#include "internal.h" + +/* Definitions for ACPI_DEBUG_PRINT() */ +#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 ENABLE_DEBUGGER +#include <linux/kdb.h> + +/* stuff for debugger support */ +int acpi_in_debugger; +EXPORT_SYMBOL(acpi_in_debugger); +#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; +static bool acpi_os_initialized; +unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; +bool acpi_permanent_mmap = false; + +/* + * 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; + union { + unsigned long refcount; + struct rcu_work rwork; + } track; +}; + +static LIST_HEAD(acpi_ioremaps); +static DEFINE_MUTEX(acpi_ioremap_lock); +#define acpi_ioremap_lock_held() lock_is_held(&acpi_ioremap_lock.dep_map) + +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; + + /* Resources are never freed */ + if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) + request_region(addr, length, desc); + else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) + request_mem_region(addr, length, desc); +} + +static int __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"); + + return 0; +} +fs_initcall_sync(acpi_reserve_resources); + +void acpi_os_printf(const char *fmt, ...) +{ + va_list args; + va_start(args, fmt); + acpi_os_vprintf(fmt, args); + va_end(args); +} +EXPORT_SYMBOL(acpi_os_printf); + +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 { + if (printk_get_level(buffer)) + printk("%s", buffer); + else + printk(KERN_CONT "%s", buffer); + } +#else + if (acpi_debugger_write_log(buffer) < 0) { + if (printk_get_level(buffer)) + printk("%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) +{ + return kstrtoul(arg, 16, &acpi_rsdp); +} +early_param("acpi_rsdp", setup_acpi_rsdp); +#endif + +acpi_physical_address __init acpi_os_get_root_pointer(void) +{ + acpi_physical_address pa; + +#ifdef CONFIG_KEXEC + /* + * We may have been provided with an RSDP on the command line, + * but if a malicious user has done so they may be pointing us + * at modified ACPI tables that could alter kernel behaviour - + * so, we check the lockdown status before making use of + * it. If we trust it then also stash it in an architecture + * specific location (if appropriate) so it can be carried + * over further kexec()s. + */ + if (acpi_rsdp && !security_locked_down(LOCKDOWN_ACPI_TABLES)) { + acpi_arch_set_root_pointer(acpi_rsdp); + return acpi_rsdp; + } +#endif + pa = acpi_arch_get_root_pointer(); + if (pa) + return pa; + + if (efi_enabled(EFI_CONFIG_TABLES)) { + if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) + return efi.acpi20; + if (efi.acpi != EFI_INVALID_TABLE_ADDR) + return efi.acpi; + pr_err("System description tables not found\n"); + } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { + acpi_find_root_pointer(&pa); + } + + return pa; +} + +/* 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, acpi_ioremap_lock_held()) + 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->track.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, acpi_ioremap_lock_held()) + 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); +} + +/** + * acpi_os_map_iomem - Get a virtual address for a given physical address range. + * @phys: Start of the physical address range to map. + * @size: Size of the physical address range to map. + * + * Look up the given physical address range in the list of existing ACPI memory + * mappings. If found, get a reference to it and return a pointer to it (its + * virtual address). If not found, map it, add it to that list and return a + * pointer to it. + * + * During early init (when acpi_permanent_mmap has not been set yet) this + * routine simply calls __acpi_map_table() to get the job done. + */ +void __iomem __ref +*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) { + pr_err("Cannot map memory that high: 0x%llx\n", phys); + return NULL; + } + + if (!acpi_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->track.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(phys, size); + if (!virt) { + mutex_unlock(&acpi_ioremap_lock); + kfree(map); + return NULL; + } + + INIT_LIST_HEAD(&map->list); + map->virt = (void __iomem __force *)((unsigned long)virt & PAGE_MASK); + map->phys = pg_off; + map->size = pg_sz; + map->track.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 *__ref 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_map_remove(struct work_struct *work) +{ + struct acpi_ioremap *map = container_of(to_rcu_work(work), + struct acpi_ioremap, + track.rwork); + + acpi_unmap(map->phys, map->virt); + kfree(map); +} + +/* Must be called with mutex_lock(&acpi_ioremap_lock) */ +static void acpi_os_drop_map_ref(struct acpi_ioremap *map) +{ + if (--map->track.refcount) + return; + + list_del_rcu(&map->list); + + INIT_RCU_WORK(&map->track.rwork, acpi_os_map_remove); + queue_rcu_work(system_wq, &map->track.rwork); +} + +/** + * acpi_os_unmap_iomem - Drop a memory mapping reference. + * @virt: Start of the address range to drop a reference to. + * @size: Size of the address range to drop a reference to. + * + * Look up the given virtual address range in the list of existing ACPI memory + * mappings, drop a reference to it and if there are no more active references + * to it, queue it up for later removal. + * + * During early init (when acpi_permanent_mmap has not been set yet) this + * routine simply calls __acpi_unmap_table() to get the job done. Since + * __acpi_unmap_table() is an __init function, the __ref annotation is needed + * here. + */ +void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) +{ + struct acpi_ioremap *map; + + if (!acpi_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, "ACPI: %s: bad address %p\n", __func__, virt); + return; + } + acpi_os_drop_map_ref(map); + + mutex_unlock(&acpi_ioremap_lock); +} +EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); + +/** + * acpi_os_unmap_memory - Drop a memory mapping reference. + * @virt: Start of the address range to drop a reference to. + * @size: Size of the address range to drop a reference to. + */ +void __ref acpi_os_unmap_memory(void *virt, acpi_size size) +{ + acpi_os_unmap_iomem((void __iomem *)virt, size); +} +EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); + +void __iomem *acpi_os_map_generic_address(struct acpi_generic_address *gas) +{ + u64 addr; + + if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) + return NULL; + + /* Handle possible alignment issues */ + memcpy(&addr, &gas->address, sizeof(addr)); + if (!addr || !gas->bit_width) + return NULL; + + return acpi_os_map_iomem(addr, gas->bit_width / 8); +} +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); +} +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 + +#ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE +static bool acpi_rev_override; + +int __init acpi_rev_override_setup(char *str) +{ + acpi_rev_override = true; + return 1; +} +__setup("acpi_rev_override", acpi_rev_override_setup); +#else +#define acpi_rev_override false +#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)) { + pr_info("Overriding _OS definition to '%s'\n", acpi_os_name); + *new_val = acpi_os_name; + } + + if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { + pr_info("Overriding _REV return value to 5\n"); + *new_val = (char *)5; + } + + return AE_OK; +} + +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) { + pr_err("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)) { + pr_err("SCI (IRQ%d) allocation failed\n", irq); + acpi_irq_handler = NULL; + return AE_NOT_ACQUIRED; + } + acpi_sci_irq = irq; + + return AE_OK; +} + +acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) +{ + if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) + return AE_BAD_PARAMETER; + + free_irq(acpi_sci_irq, acpi_irq); + acpi_irq_handler = NULL; + acpi_sci_irq = INVALID_ACPI_IRQ; + + 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 a 64-bit free-running, + * monotonically increasing timer with 100ns granularity. Do not use + * ktime_get() to implement this function because this function may get + * called after timekeeping has been suspended. Note: calling this function + * after timekeeping has been suspended may lead to unexpected results + * because when timekeeping is suspended the jiffies counter is not + * incremented. See also timekeeping_suspend(). + */ +u64 acpi_os_get_timer(void) +{ + return (get_jiffies_64() - INITIAL_JIFFIES) * + (ACPI_100NSEC_PER_SEC / HZ); +} + +acpi_status acpi_os_read_port(acpi_io_address port, u32 *value, u32 width) +{ + u32 dummy; + + if (value) + *value = 0; + else + value = &dummy; + + if (width <= 8) { + *value = inb(port); + } else if (width <= 16) { + *value = inw(port); + } else if (width <= 32) { + *value = inl(port); + } else { + pr_debug("%s: Access width %d not supported\n", __func__, width); + return AE_BAD_PARAMETER; + } + + 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 { + pr_debug("%s: Access width %d not supported\n", __func__, width); + return AE_BAD_PARAMETER; + } + + return AE_OK; +} + +EXPORT_SYMBOL(acpi_os_write_port); + +int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width) +{ + + 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 = readq(virt_addr); + break; + default: + return -EINVAL; + } + + return 0; +} + +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; + int error; + + 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; + + error = acpi_os_read_iomem(virt_addr, value, width); + BUG_ON(error); + + if (unmap) + iounmap(virt_addr); + else + rcu_read_unlock(); + + return AE_OK; +} + +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: + writeq(value, virt_addr); + break; + default: + BUG(); + } + + if (unmap) + iounmap(virt_addr); + else + rcu_read_unlock(); + + return AE_OK; +} + +#ifdef CONFIG_PCI +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); +} +#endif + +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); +} + +#ifdef CONFIG_ACPI_DEBUGGER +static struct acpi_debugger acpi_debugger; +static bool acpi_debugger_initialized; + +int acpi_register_debugger(struct module *owner, + const struct acpi_debugger_ops *ops) +{ + int ret = 0; + + mutex_lock(&acpi_debugger.lock); + if (acpi_debugger.ops) { + ret = -EBUSY; + goto err_lock; + } + + acpi_debugger.owner = owner; + acpi_debugger.ops = ops; + +err_lock: + mutex_unlock(&acpi_debugger.lock); + return ret; +} +EXPORT_SYMBOL(acpi_register_debugger); + +void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) +{ + mutex_lock(&acpi_debugger.lock); + if (ops == acpi_debugger.ops) { + acpi_debugger.ops = NULL; + acpi_debugger.owner = NULL; + } + mutex_unlock(&acpi_debugger.lock); +} +EXPORT_SYMBOL(acpi_unregister_debugger); + +int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) +{ + int ret; + int (*func)(acpi_osd_exec_callback, void *); + struct module *owner; + + if (!acpi_debugger_initialized) + return -ENODEV; + mutex_lock(&acpi_debugger.lock); + if (!acpi_debugger.ops) { + ret = -ENODEV; + goto err_lock; + } + if (!try_module_get(acpi_debugger.owner)) { + ret = -ENODEV; + goto err_lock; + } + func = acpi_debugger.ops->create_thread; + owner = acpi_debugger.owner; + mutex_unlock(&acpi_debugger.lock); + + ret = func(function, context); + + mutex_lock(&acpi_debugger.lock); + module_put(owner); +err_lock: + mutex_unlock(&acpi_debugger.lock); + return ret; +} + +ssize_t acpi_debugger_write_log(const char *msg) +{ + ssize_t ret; + ssize_t (*func)(const char *); + struct module *owner; + + if (!acpi_debugger_initialized) + return -ENODEV; + mutex_lock(&acpi_debugger.lock); + if (!acpi_debugger.ops) { + ret = -ENODEV; + goto err_lock; + } + if (!try_module_get(acpi_debugger.owner)) { + ret = -ENODEV; + goto err_lock; + } + func = acpi_debugger.ops->write_log; + owner = acpi_debugger.owner; + mutex_unlock(&acpi_debugger.lock); + + ret = func(msg); + + mutex_lock(&acpi_debugger.lock); + module_put(owner); +err_lock: + mutex_unlock(&acpi_debugger.lock); + return ret; +} + +ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) +{ + ssize_t ret; + ssize_t (*func)(char *, size_t); + struct module *owner; + + if (!acpi_debugger_initialized) + return -ENODEV; + mutex_lock(&acpi_debugger.lock); + if (!acpi_debugger.ops) { + ret = -ENODEV; + goto err_lock; + } + if (!try_module_get(acpi_debugger.owner)) { + ret = -ENODEV; + goto err_lock; + } + func = acpi_debugger.ops->read_cmd; + owner = acpi_debugger.owner; + mutex_unlock(&acpi_debugger.lock); + + ret = func(buffer, buffer_length); + + mutex_lock(&acpi_debugger.lock); + module_put(owner); +err_lock: + mutex_unlock(&acpi_debugger.lock); + return ret; +} + +int acpi_debugger_wait_command_ready(void) +{ + int ret; + int (*func)(bool, char *, size_t); + struct module *owner; + + if (!acpi_debugger_initialized) + return -ENODEV; + mutex_lock(&acpi_debugger.lock); + if (!acpi_debugger.ops) { + ret = -ENODEV; + goto err_lock; + } + if (!try_module_get(acpi_debugger.owner)) { + ret = -ENODEV; + goto err_lock; + } + func = acpi_debugger.ops->wait_command_ready; + owner = acpi_debugger.owner; + mutex_unlock(&acpi_debugger.lock); + + ret = func(acpi_gbl_method_executing, + acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); + + mutex_lock(&acpi_debugger.lock); + module_put(owner); +err_lock: + mutex_unlock(&acpi_debugger.lock); + return ret; +} + +int acpi_debugger_notify_command_complete(void) +{ + int ret; + int (*func)(void); + struct module *owner; + + if (!acpi_debugger_initialized) + return -ENODEV; + mutex_lock(&acpi_debugger.lock); + if (!acpi_debugger.ops) { + ret = -ENODEV; + goto err_lock; + } + if (!try_module_get(acpi_debugger.owner)) { + ret = -ENODEV; + goto err_lock; + } + func = acpi_debugger.ops->notify_command_complete; + owner = acpi_debugger.owner; + mutex_unlock(&acpi_debugger.lock); + + ret = func(); + + mutex_lock(&acpi_debugger.lock); + module_put(owner); +err_lock: + mutex_unlock(&acpi_debugger.lock); + return ret; +} + +int __init acpi_debugger_init(void) +{ + mutex_init(&acpi_debugger.lock); + acpi_debugger_initialized = true; + return 0; +} +#endif + +/******************************************************************************* + * + * 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)); + + if (type == OSL_DEBUGGER_MAIN_THREAD) { + ret = acpi_debugger_create_thread(function, context); + if (ret) { + pr_err("Kernel thread creation failed\n"); + status = AE_ERROR; + } + goto out_thread; + } + + /* + * 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 if (type == OSL_GPE_HANDLER) { + queue = kacpid_wq; + INIT_WORK(&dpc->work, acpi_os_execute_deferred); + } else { + pr_err("Unsupported os_execute type %d.\n", type); + status = AE_ERROR; + } + + if (ACPI_FAILURE(status)) + goto err_workqueue; + + /* + * 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) { + pr_err("Unable to queue work\n"); + status = AE_ERROR; + } +err_workqueue: + if (ACPI_FAILURE(status)) + kfree(dpc); +out_thread: + 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_sci_irq_valid()) + synchronize_hardirq(acpi_sci_irq); + flush_workqueue(kacpid_wq); + flush_workqueue(kacpi_notify_wq); +} +EXPORT_SYMBOL(acpi_os_wait_events_complete); + +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_handle_debug(adev->handle, + "Scheduling hotplug event %u for deferred handling\n", + 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 (!acpi_os_initialized) + return AE_OK; + + 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 (!acpi_os_initialized) + return AE_OK; + + 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; +} + +acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) +{ +#ifdef ENABLE_DEBUGGER + if (acpi_in_debugger) { + u32 chars; + + kdb_read(buffer, buffer_length); + + /* remove the CR kdb includes */ + chars = strlen(buffer) - 1; + buffer[chars] = '\0'; + } +#else + int ret; + + ret = acpi_debugger_read_cmd(buffer, buffer_length); + if (ret < 0) + return AE_ERROR; + if (bytes_read) + *bytes_read = ret; +#endif + + return AE_OK; +} +EXPORT_SYMBOL(acpi_os_get_line); + +acpi_status acpi_os_wait_command_ready(void) +{ + int ret; + + ret = acpi_debugger_wait_command_ready(); + if (ret < 0) + return AE_ERROR; + return AE_OK; +} + +acpi_status acpi_os_notify_command_complete(void) +{ + int ret; + + ret = acpi_debugger_notify_command_complete(); + if (ret < 0) + return AE_ERROR; + return AE_OK; +} + +acpi_status acpi_os_signal(u32 function, void *info) +{ + switch (function) { + case ACPI_SIGNAL_FATAL: + pr_err("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); + +/* + * 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("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; + + if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) + return 0; + + if (res->flags & IORESOURCE_IO) + space_id = ACPI_ADR_SPACE_SYSTEM_IO; + else if (res->flags & IORESOURCE_MEM) + space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; + else + return 0; + + if (!acpi_check_address_range(space_id, res->start, resource_size(res), 1)) + return 0; + + pr_info("Resource conflict; ACPI support missing from driver?\n"); + + if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) + return -EBUSY; + + if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) + pr_notice("Resource conflict: System may be unstable or behave erratically\n"); + + 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 = DEFINE_RES_IO_NAMED(start, n, name); + + 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) + __acquires(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) + __releases(lockp) +{ + 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("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) +{ + pr_notice("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_gbl_xgpe0_block_logical_address = + (unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); + acpi_gbl_xgpe1_block_logical_address = + (unsigned long)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. + */ + void *rv; + + rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); + pr_debug("%s: Reset register mapping %s\n", __func__, + rv ? "successful" : "failed"); + } + acpi_os_initialized = true; + + return AE_OK; +} + +acpi_status __init acpi_os_initialize1(void) +{ + 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_osi_init(); + 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_gbl_xgpe0_block_logical_address = 0UL; + acpi_gbl_xgpe1_block_logical_address = 0UL; + + 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_TERMINATE; + + 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; +} + +#if (ACPI_REDUCED_HARDWARE) +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_TERMINATE; + + return AE_OK; +} +#else +acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, + u32 val_b) +{ + return AE_OK; +} +#endif + +void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, + u32 val_a, u32 val_b)) +{ + __acpi_os_prepare_extended_sleep = func; +} + +acpi_status acpi_os_enter_sleep(u8 sleep_state, + u32 reg_a_value, u32 reg_b_value) +{ + acpi_status status; + + if (acpi_gbl_reduced_hardware) + status = acpi_os_prepare_extended_sleep(sleep_state, + reg_a_value, + reg_b_value); + else + status = acpi_os_prepare_sleep(sleep_state, + reg_a_value, reg_b_value); + return status; +} |