25097bf153
Currently the storage of the machine flags is a globally exported unsigned long long variable. By moving the storage location into the lowcore struct we allow assembler code to check machine_flags directly even without needing a register. Addtionally the lowcore and therefore the machine flags too will be in cache most of the time. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
26 lines
617 B
C
26 lines
617 B
C
/*
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* Copyright IBM Corp. 2000,2009
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* Author(s): Hartmut Penner <hp@de.ibm.com>,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Christian Ehrhardt <ehrhardt@de.ibm.com>
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*/
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#ifndef _ASM_S390_CPUID_H_
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#define _ASM_S390_CPUID_H_
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/*
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* CPU type and hardware bug flags. Kept separately for each CPU.
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* Members of this structure are referenced in head.S, so think twice
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* before touching them. [mj]
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*/
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typedef struct
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{
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unsigned int version : 8;
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unsigned int ident : 24;
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unsigned int machine : 16;
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unsigned int unused : 16;
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} __attribute__ ((packed)) cpuid_t;
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#endif /* _ASM_S390_CPUID_H_ */
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