On Tue, Dec 3, 2013 at 10:36 AM, Hanjun Guo hanjun.guo@linaro.org 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 | 11 +++++++++++ arch/arm64/kernel/process.c | 5 +++++ 3 files changed, 48 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..c186f5b --- /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_ARM_ACPI_H +#define _ASM_ARM_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_ARM_ACPI_H*/ diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 45b20cd..73b1d3a 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -162,6 +162,17 @@ static inline void spin_lock_prefetch(const void *x)
#define HAVE_ARCH_PICK_MMAP_LAYOUT
+#ifdef CONFIG_ACPI
The ifdef is not necessary.
+/*
- FIXME: there is no MWAIT on ARM, should be WFI or something else,
- and modify drivers/acpi/processor_core.c too.
- */
+enum idle_boot_override { IDLE_NO_OVERRIDE = 0, IDLE_HALT, IDLE_NOMWAIT,
IDLE_POLL, IDLE_FORCE_MWAIT };+extern unsigned long boot_option_idle_override; +#endif