From ae3a197e3d0bfe3f4bf1693723e82dc018c096f3 Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 28 Mar 2012 18:30:02 +0100 Subject: Disintegrate asm/system.h for PowerPC Disintegrate asm/system.h for PowerPC. Signed-off-by: David Howells Acked-by: Benjamin Herrenschmidt cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/include/asm/runlatch.h | 45 +++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 arch/powerpc/include/asm/runlatch.h (limited to 'arch/powerpc/include/asm/runlatch.h') diff --git a/arch/powerpc/include/asm/runlatch.h b/arch/powerpc/include/asm/runlatch.h new file mode 100644 index 000000000000..54e9b963876e --- /dev/null +++ b/arch/powerpc/include/asm/runlatch.h @@ -0,0 +1,45 @@ +/* + * Copyright (C) 1999 Cort Dougan + */ +#ifndef _ASM_POWERPC_RUNLATCH_H +#define _ASM_POWERPC_RUNLATCH_H + +#ifdef CONFIG_PPC64 + +extern void __ppc64_runlatch_on(void); +extern void __ppc64_runlatch_off(void); + +/* + * We manually hard enable-disable, this is called + * in the idle loop and we don't want to mess up + * with soft-disable/enable & interrupt replay. + */ +#define ppc64_runlatch_off() \ + do { \ + if (cpu_has_feature(CPU_FTR_CTRL) && \ + test_thread_local_flags(_TLF_RUNLATCH)) { \ + unsigned long msr = mfmsr(); \ + __hard_irq_disable(); \ + __ppc64_runlatch_off(); \ + if (msr & MSR_EE) \ + __hard_irq_enable(); \ + } \ + } while (0) + +#define ppc64_runlatch_on() \ + do { \ + if (cpu_has_feature(CPU_FTR_CTRL) && \ + !test_thread_local_flags(_TLF_RUNLATCH)) { \ + unsigned long msr = mfmsr(); \ + __hard_irq_disable(); \ + __ppc64_runlatch_on(); \ + if (msr & MSR_EE) \ + __hard_irq_enable(); \ + } \ + } while (0) +#else +#define ppc64_runlatch_on() +#define ppc64_runlatch_off() +#endif /* CONFIG_PPC64 */ + +#endif /* _ASM_POWERPC_RUNLATCH_H */ -- cgit v1.2.3