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PPC64: Fix timebase

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On PPC we have a 64-bit time base. Usually (PPC32) this is accessed using
two separate 32 bit SPR accesses to SPR_TBU and SPR_TBL.

On PPC64 the SPR_TBL register acts as 64 bit though, so we get the full
64 bits as return value. If we only take the lower ones, fine. But Linux
wants to see all 64 bits or it breaks.

This patch makes PPC64 Linux work even after TB crossed the 32-bit boundary,
which usually happened a few seconds after bootup.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Alexander Graf 2009-12-21 12:24:17 +01:00 • committed by Aurelien Jarno
parent c4b3be3966
commit e3ea652962
5 changed files with 8 additions and 8 deletions
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4
darwin-user/main.c
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@ -82,9 +82,9 @@ static inline uint64_t cpu_ppc_get_tb (CPUState *env)
return 0;
}
uint32_t cpu_ppc_load_tbl (CPUState *env)
uint64_t cpu_ppc_load_tbl (CPUState *env)
{
return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
return cpu_ppc_get_tb(env);
}
uint32_t cpu_ppc_load_tbu (CPUState *env)