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@xxxxxxxxxx>
>> Signed-off-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
>> Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
>> ---
>> 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@xxxxxxxxxx>
>> + *
>> + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> + *
>> + * 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
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