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OpenCloudOS-Kernel/arch/x86/include/asm/mwait.h

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x86, mwait: Move mwait constants to a common header file We have MWAIT constants spread across three different .c files, for no good reason. Move them all into a common header file. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Len Brown <lenb@kernel.org> LKML-Reference: <tip-*@git.kernel.org>
2010-09-18 06:36:40 +08:00
#ifndef _ASM_X86_MWAIT_H
#define _ASM_X86_MWAIT_H
#define MWAIT_SUBSTATE_MASK 0xf
#define MWAIT_CSTATE_MASK 0xf
#define MWAIT_SUBSTATE_SIZE 4
intel_idle: remove assumption of one C-state per MWAIT flag Remove the assumption that cstate_tables are indexed by MWAIT flag values. Each entry identifies itself via its own flags value. This change is needed to support multiple states that share the same MWAIT flags. Note that this can have an effect on what state is described by 'N' on cmdline intel_idle.max_cstate=N on some systems. intel_idle.max_cstate=0 still disables the driver intel_idle.max_cstate=1 still results in just C1(E) However, "place holders" in the sparse C-state name-space (eg. Atom) have been removed. Signed-off-by: Len Brown <len.brown@intel.com>
2013-02-02 12:37:30 +08:00
#define MWAIT_HINT2CSTATE(hint) (((hint) >> MWAIT_SUBSTATE_SIZE) & MWAIT_CSTATE_MASK)
#define MWAIT_HINT2SUBSTATE(hint) ((hint) & MWAIT_CSTATE_MASK)
x86, mwait: Move mwait constants to a common header file We have MWAIT constants spread across three different .c files, for no good reason. Move them all into a common header file. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Reviewed-by: Arjan van de Ven <arjan@linux.intel.com> Cc: Len Brown <lenb@kernel.org> LKML-Reference: <tip-*@git.kernel.org>
2010-09-18 06:36:40 +08:00
#define CPUID_MWAIT_LEAF 5
#define CPUID5_ECX_EXTENSIONS_SUPPORTED 0x1
#define CPUID5_ECX_INTERRUPT_BREAK 0x2
#define MWAIT_ECX_INTERRUPT_BREAK 0x1
#endif /* _ASM_X86_MWAIT_H */