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49 lines
1.1 KiB
49 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* IA64 specific ACPICA environments and implementation |
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* |
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* Copyright (C) 2014, Intel Corporation |
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* Author: Lv Zheng <[email protected]> |
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*/ |
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#ifndef _ASM_IA64_ACENV_H |
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#define _ASM_IA64_ACENV_H |
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#include <asm/intrinsics.h> |
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#define COMPILER_DEPENDENT_INT64 long |
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#define COMPILER_DEPENDENT_UINT64 unsigned long |
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/* Asm macros */ |
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static inline int |
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ia64_acpi_acquire_global_lock(unsigned int *lock) |
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{ |
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unsigned int old, new, val; |
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do { |
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old = *lock; |
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new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1)); |
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val = ia64_cmpxchg4_acq(lock, new, old); |
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} while (unlikely (val != old)); |
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return (new < 3) ? -1 : 0; |
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} |
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static inline int |
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ia64_acpi_release_global_lock(unsigned int *lock) |
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{ |
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unsigned int old, new, val; |
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do { |
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old = *lock; |
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new = old & ~0x3; |
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val = ia64_cmpxchg4_acq(lock, new, old); |
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} while (unlikely (val != old)); |
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return old & 0x1; |
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} |
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#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \ |
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((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock)) |
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#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \ |
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((Acq) = ia64_acpi_release_global_lock(&facs->global_lock)) |
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#endif /* _ASM_IA64_ACENV_H */
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