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cd42145cd9
Some firmwares do not put the CPU into idle mode themselves, but still need to be informed that the CPU is about to enter idle mode before this happens. Add a prepare_idle() operation to the firmware_ops structure to handle such cases. Signed-off-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Stephen Warren <swarren@nvidia.com>
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
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* Copyright (C) 2012 Samsung Electronics.
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* Kyungmin Park <kyungmin.park@samsung.com>
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* Tomasz Figa <t.figa@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_ARM_FIRMWARE_H
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#define __ASM_ARM_FIRMWARE_H
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#include <linux/bug.h>
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/*
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* struct firmware_ops
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*
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* A structure to specify available firmware operations.
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*
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* A filled up structure can be registered with register_firmware_ops().
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*/
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struct firmware_ops {
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/*
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* Inform the firmware we intend to enter CPU idle mode
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*/
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int (*prepare_idle)(void);
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/*
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* Enters CPU idle mode
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*/
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int (*do_idle)(void);
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/*
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* Sets boot address of specified physical CPU
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*/
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int (*set_cpu_boot_addr)(int cpu, unsigned long boot_addr);
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/*
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* Boots specified physical CPU
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*/
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int (*cpu_boot)(int cpu);
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/*
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* Initializes L2 cache
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*/
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int (*l2x0_init)(void);
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};
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/* Global pointer for current firmware_ops structure, can't be NULL. */
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extern const struct firmware_ops *firmware_ops;
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/*
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* call_firmware_op(op, ...)
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*
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* Checks if firmware operation is present and calls it,
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* otherwise returns -ENOSYS
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*/
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#define call_firmware_op(op, ...) \
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((firmware_ops->op) ? firmware_ops->op(__VA_ARGS__) : (-ENOSYS))
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/*
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* register_firmware_ops(ops)
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*
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* A function to register platform firmware_ops struct.
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*/
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static inline void register_firmware_ops(const struct firmware_ops *ops)
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{
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BUG_ON(!ops);
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firmware_ops = ops;
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}
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#endif
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