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| author | David Howells <dhowells@redhat.com> | 2012-03-28 19:30:02 +0200 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2012-03-28 19:30:02 +0200 |
| commit | ae3a197e3d0bfe3f4bf1693723e82dc018c096f3 (patch) | |
| tree | 12a222c01afd73dbc3ebb6859952083e2eb96441 /arch/powerpc/include/asm/runlatch.h | |
| parent | Disintegrate asm/system.h for PA-RISC (diff) | |
| download | linux-ae3a197e3d0bfe3f4bf1693723e82dc018c096f3.tar.xz linux-ae3a197e3d0bfe3f4bf1693723e82dc018c096f3.zip | |
Disintegrate asm/system.h for PowerPC
Disintegrate asm/system.h for PowerPC.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
cc: linuxppc-dev@lists.ozlabs.org
Diffstat (limited to 'arch/powerpc/include/asm/runlatch.h')
| -rw-r--r-- | arch/powerpc/include/asm/runlatch.h | 45 |
1 files changed, 45 insertions, 0 deletions
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 <cort@cs.nmt.edu> + */ +#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 */ |