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144 lines
3.3 KiB
144 lines
3.3 KiB
/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ |
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/****************************************************************************** |
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* |
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* Name: aclinuxex.h - Extra OS specific defines, etc. for Linux |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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#ifndef __ACLINUXEX_H__ |
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#define __ACLINUXEX_H__ |
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#ifdef __KERNEL__ |
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#ifndef ACPI_USE_NATIVE_DIVIDE |
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#ifndef ACPI_DIV_64_BY_32 |
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#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \ |
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do { \ |
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u64 (__n) = ((u64) n_hi) << 32 | (n_lo); \ |
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(r32) = do_div ((__n), (d32)); \ |
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(q32) = (u32) (__n); \ |
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} while (0) |
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#endif |
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#ifndef ACPI_SHIFT_RIGHT_64 |
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#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \ |
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do { \ |
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(n_lo) >>= 1; \ |
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(n_lo) |= (((n_hi) & 1) << 31); \ |
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(n_hi) >>= 1; \ |
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} while (0) |
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#endif |
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#endif |
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/* |
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* Overrides for in-kernel ACPICA |
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*/ |
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acpi_status ACPI_INIT_FUNCTION acpi_os_initialize(void); |
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acpi_status acpi_os_terminate(void); |
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/* |
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* The irqs_disabled() check is for resume from RAM. |
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* Interrupts are off during resume, just like they are for boot. |
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* However, boot has (system_state != SYSTEM_RUNNING) |
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* to quiet __might_sleep() in kmalloc() and resume does not. |
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*/ |
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static inline void *acpi_os_allocate(acpi_size size) |
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{ |
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return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
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} |
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static inline void *acpi_os_allocate_zeroed(acpi_size size) |
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{ |
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return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
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} |
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static inline void acpi_os_free(void *memory) |
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{ |
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kfree(memory); |
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} |
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static inline void *acpi_os_acquire_object(acpi_cache_t * cache) |
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{ |
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return kmem_cache_zalloc(cache, |
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irqs_disabled()? GFP_ATOMIC : GFP_KERNEL); |
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} |
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static inline acpi_thread_id acpi_os_get_thread_id(void) |
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{ |
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return (acpi_thread_id) (unsigned long)current; |
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} |
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/* |
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* When lockdep is enabled, the spin_lock_init() macro stringifies it's |
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* argument and uses that as a name for the lock in debugging. |
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* By executing spin_lock_init() in a macro the key changes from "lock" for |
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* all locks to the name of the argument of acpi_os_create_lock(), which |
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* prevents lockdep from reporting false positives for ACPICA locks. |
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*/ |
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#define acpi_os_create_lock(__handle) \ |
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({ \ |
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spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ |
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if (lock) { \ |
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*(__handle) = lock; \ |
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spin_lock_init(*(__handle)); \ |
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} \ |
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lock ? AE_OK : AE_NO_MEMORY; \ |
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}) |
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#define acpi_os_create_raw_lock(__handle) \ |
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({ \ |
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raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \ |
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if (lock) { \ |
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*(__handle) = lock; \ |
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raw_spin_lock_init(*(__handle)); \ |
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} \ |
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lock ? AE_OK : AE_NO_MEMORY; \ |
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}) |
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static inline acpi_cpu_flags acpi_os_acquire_raw_lock(acpi_raw_spinlock lockp) |
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{ |
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acpi_cpu_flags flags; |
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raw_spin_lock_irqsave(lockp, flags); |
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return flags; |
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} |
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static inline void acpi_os_release_raw_lock(acpi_raw_spinlock lockp, |
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acpi_cpu_flags flags) |
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{ |
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raw_spin_unlock_irqrestore(lockp, flags); |
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} |
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static inline void acpi_os_delete_raw_lock(acpi_raw_spinlock handle) |
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{ |
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ACPI_FREE(handle); |
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} |
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static inline u8 acpi_os_readable(void *pointer, acpi_size length) |
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{ |
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return TRUE; |
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} |
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static inline acpi_status acpi_os_initialize_debugger(void) |
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{ |
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return AE_OK; |
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} |
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static inline void acpi_os_terminate_debugger(void) |
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{ |
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return; |
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} |
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/* |
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* OSL interfaces added by Linux |
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*/ |
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#endif /* __KERNEL__ */ |
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#endif /* __ACLINUXEX_H__ */
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