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powerpc/booke: Don't set DABR on 64-bit BookE, use DAC1 instead

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Also remove a duplicate setting of it in the context switch path
on BookE.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2009-09-08 14:16:58 +00:00
parent e51ee31e8a
commit c6c9eacef0
1 changed files with 7 additions and 7 deletions
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14
arch/powerpc/kernel/process.c
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@ -284,13 +284,12 @@ int set_dabr(unsigned long dabr)
return ppc_md.set_dabr(dabr);
/* XXX should we have a CPU_FTR_HAS_DABR ? */
#if defined(CONFIG_PPC64) || defined(CONFIG_6xx)
#if defined(CONFIG_BOOKE)
mtspr(SPRN_DAC1, dabr);
#elif defined(CONFIG_PPC_BOOK3S)
mtspr(SPRN_DABR, dabr);
#endif
#if defined(CONFIG_BOOKE)
mtspr(SPRN_DAC1, dabr);
#endif
return 0;
}
@ -372,15 +371,16 @@ struct task_struct *__switch_to(struct task_struct *prev,
#endif /* CONFIG_SMP */
if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr))
set_dabr(new->thread.dabr);
#if defined(CONFIG_BOOKE)
/* If new thread DAC (HW breakpoint) is the same then leave it */
if (new->thread.dabr)
set_dabr(new->thread.dabr);
#else
if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr))
set_dabr(new->thread.dabr);
#endif
new_thread = &new->thread;
old_thread = &current->thread;