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[S390] New get_cpu_id() inline assembly

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Replace two stidp inline assemblies with one global implementation.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2007-02-21 10:55:18 +01:00 committed by Martin Schwidefsky
parent 6c732de2d3
commit 72960a02c2
3 changed files with 7 additions and 2 deletions
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2
arch/s390/kernel/early.c
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@ -129,7 +129,7 @@ static noinline __init void detect_machine_type(void)
{
struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data;
asm volatile("stidp %0" : "=m" (S390_lowcore.cpu_data.cpu_id));
get_cpu_id(&S390_lowcore.cpu_data.cpu_id);
/* Running under z/VM ? */
if (cpuinfo->cpu_id.version == 0xff)

2
arch/s390/kernel/setup.c
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@ -106,7 +106,7 @@ void __devinit cpu_init (void)
/*
* Store processor id in lowcore (used e.g. in timer_interrupt)
*/
asm volatile("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));
get_cpu_id(&S390_lowcore.cpu_data.cpu_id);
S390_lowcore.cpu_data.cpu_addr = addr;
/*

5
include/asm-s390/processor.h
View File

@ -36,6 +36,11 @@ typedef struct
unsigned int unused : 16;
} __attribute__ ((packed)) cpuid_t;
static inline void get_cpu_id(cpuid_t *ptr)
{
asm volatile("stidp 0(%1)" : "=m" (*ptr) : "a" (ptr));
}
struct cpuinfo_S390
{
cpuid_t cpu_id;