On 2014-1-17 22:25, Sudeep Holla wrote:
On 17/01/14 12:24, Hanjun Guo wrote:
The _PDC (Processor Driver Capabilities) object provides OSPM a mechanism to convey to the platform the capabilities supported by OSPM for processor power management.
OSPM evaluates _PDC prior to evaluating any other processor power management objects returning configuration information.
This patch introduces the skeleton of _PDC related file to make ACPI core can be compiled on ARM64.
Signed-off-by: Al Stone al.stone@linaro.org Signed-off-by: Graeme Gregory graeme.gregory@linaro.org Signed-off-by: Hanjun Guo hanjun.guo@linaro.org
arch/arm64/include/asm/acpi.h | 32 ++++++++++++++++++++++++++++++++ arch/arm64/include/asm/processor.h | 2 ++ arch/arm64/kernel/process.c | 3 +++ 3 files changed, 37 insertions(+) create mode 100644 arch/arm64/include/asm/acpi.h
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h new file mode 100644 index 0000000..cf19dc6 --- /dev/null +++ b/arch/arm64/include/asm/acpi.h @@ -0,0 +1,32 @@ +/*
- Copyright (C) 2013, Al Stone al.stone@linaro.org
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- */
+#ifndef _ASM_ARM64_ACPI_H +#define _ASM_ARM64_ACPI_H
+static inline bool arch_has_acpi_pdc(void) +{
- return false; /* always false for now */
+}
+static inline void arch_acpi_set_pdc_bits(u32 *buf) +{
- return;
+}
+#endif /*_ASM_ARM64_ACPI_H*/ diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 45b20cd..50ce951 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -162,6 +162,8 @@ static inline void spin_lock_prefetch(const void *x) #define HAVE_ARCH_PICK_MMAP_LAYOUT +extern unsigned long boot_option_idle_override;
#endif #endif /* __ASM_PROCESSOR_H */ diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index de17c89..13d3d7f 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -89,6 +89,9 @@ void arch_cpu_idle_prepare(void) local_fiq_enable(); } +unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE; +EXPORT_SYMBOL(boot_option_idle_override);
This is what I mentioned in other email. Do we really foresee use of this in ARM64 or it's just added to avoid build issues ?
Just avoid build issues, can not foresee use of this in ARM64 :)
Thanks Hanjun