diff options
| author | Will Deacon <will.deacon@arm.com> | 2012-12-18 17:53:14 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-01-29 16:56:37 +0000 |
| commit | e790f1deb26a2e23f05dee0b9a5d4f764c3d7ea7 (patch) | |
| tree | a562c97caa8662497320ef03930d37cde1395d97 /arch/arm64/include | |
| parent | d329de3f2ada413c7cd16e1dc1d70d4abc7309e9 (diff) | |
arm64: psci: add support for PSCI invocations from the kernel
This patch adds support for the Power State Coordination Interface
defined by ARM, allowing Linux to request CPU-centric power-management
operations from firmware implementing the PSCI protocol.
Signed-off-by: Will Deacon <will.deacon@arm.com>
[Marc: s/u32/u64/ in the relevant spots, and switch from an initcall
to an simpler init function]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/psci.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/psci.h b/arch/arm64/include/asm/psci.h new file mode 100644 index 00000000000..0604237ecd9 --- /dev/null +++ b/arch/arm64/include/asm/psci.h @@ -0,0 +1,38 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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. + * + * Copyright (C) 2013 ARM Limited + */ + +#ifndef __ASM_PSCI_H +#define __ASM_PSCI_H + +#define PSCI_POWER_STATE_TYPE_STANDBY 0 +#define PSCI_POWER_STATE_TYPE_POWER_DOWN 1 + +struct psci_power_state { + u16 id; + u8 type; + u8 affinity_level; +}; + +struct psci_operations { + int (*cpu_suspend)(struct psci_power_state state, + unsigned long entry_point); + int (*cpu_off)(struct psci_power_state state); + int (*cpu_on)(unsigned long cpuid, unsigned long entry_point); + int (*migrate)(unsigned long cpuid); +}; + +extern struct psci_operations psci_ops; + +int psci_init(void); + +#endif /* __ASM_PSCI_H */ |