| /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ |
| /****************************************************************************** |
| * |
| * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux |
| * |
| * Copyright (C) 2000 - 2019, Intel Corp. |
| * |
| *****************************************************************************/ |
| |
| #ifndef __ACLINUXEX_H__ |
| #define __ACLINUXEX_H__ |
| |
| #ifdef __KERNEL__ |
| |
| #ifndef ACPI_USE_NATIVE_DIVIDE |
| |
| #ifndef ACPI_DIV_64_BY_32 |
| #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ |
| do { \ |
| u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \ |
| (r32) = do_div ((__n), (d32)); \ |
| (q32) = (u32) (__n); \ |
| } while (0) |
| #endif |
| |
| #ifndef ACPI_SHIFT_RIGHT_64 |
| #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ |
| do { \ |
| (n_lo) >>= 1; \ |
| (n_lo) |= (((n_hi) & 1) << 31); \ |
| (n_hi) >>= 1; \ |
| } while (0) |
| #endif |
| |
| #endif |
| |
| /* |
| * Overrides for in-kernel ACPICA |
| */ |
| acpi_status ACPI_INIT_FUNCTION acpi_os_initialize(void); |
| |
| acpi_status acpi_os_terminate(void); |
| |
| /* |
| * The irqs_disabled() check is for resume from RAM. |
| * Interrupts are off during resume, just like they are for boot. |
| * However, boot has (system_state != SYSTEM_RUNNING) |
| * to quiet __might_sleep() in kmalloc() and resume does not. |
| */ |
| static inline void *acpi_os_allocate(acpi_size size) |
| { |
| return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
| } |
| |
| static inline void *acpi_os_allocate_zeroed(acpi_size size) |
| { |
| return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
| } |
| |
| static inline void acpi_os_free(void *memory) |
| { |
| kfree(memory); |
| } |
| |
| static inline void *acpi_os_acquire_object(acpi_cache_t * cache) |
| { |
| return kmem_cache_zalloc(cache, |
| irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
| } |
| |
| static inline acpi_thread_id acpi_os_get_thread_id(void) |
| { |
| return (acpi_thread_id) (unsigned long)current; |
| } |
| |
| /* |
| * When lockdep is enabled, the spin_lock_init() macro stringifies it's |
| * argument and uses that as a name for the lock in debugging. |
| * By executing spin_lock_init() in a macro the key changes from "lock" for |
| * all locks to the name of the argument of acpi_os_create_lock(), which |
| * prevents lockdep from reporting false positives for ACPICA locks. |
| */ |
| #define acpi_os_create_lock(__handle) \ |
| ({ \ |
| spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ |
| if (lock) { \ |
| *(__handle) = lock; \ |
| spin_lock_init(*(__handle)); \ |
| } \ |
| lock ? AE_OK : AE_NO_MEMORY; \ |
| }) |
| |
| |
| #define acpi_os_create_raw_lock(__handle) \ |
| ({ \ |
| raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ |
| if (lock) { \ |
| *(__handle) = lock; \ |
| raw_spin_lock_init(*(__handle)); \ |
| } \ |
| lock ? AE_OK : AE_NO_MEMORY; \ |
| }) |
| |
| static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp) |
| { |
| acpi_cpu_flags flags; |
| |
| raw_spin_lock_irqsave(lockp, flags); |
| return flags; |
| } |
| |
| static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp, |
| acpi_cpu_flags flags) |
| { |
| raw_spin_unlock_irqrestore(lockp, flags); |
| } |
| |
| static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle) |
| { |
| ACPI_FREE(handle); |
| } |
| |
| static inline u8 acpi_os_readable(void *pointer, acpi_size length) |
| { |
| return TRUE; |
| } |
| |
| static inline acpi_status acpi_os_initialize_debugger(void) |
| { |
| return AE_OK; |
| } |
| |
| static inline void acpi_os_terminate_debugger(void) |
| { |
| return; |
| } |
| |
| /* |
| * OSL interfaces added by Linux |
| */ |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* __ACLINUXEX_H__ */ |