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Diffstat (limited to 'arch/arm/include/asm/firmware.h')
-rw-r--r-- | arch/arm/include/asm/firmware.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/arch/arm/include/asm/firmware.h b/arch/arm/include/asm/firmware.h new file mode 100644 index 0000000000..23fe0bd405 --- /dev/null +++ b/arch/arm/include/asm/firmware.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012 Samsung Electronics. + * Kyungmin Park <kyungmin.park@samsung.com> + * Tomasz Figa <t.figa@samsung.com> + */ + +#ifndef __ASM_ARM_FIRMWARE_H +#define __ASM_ARM_FIRMWARE_H + +#include <linux/bug.h> + +/* + * struct firmware_ops + * + * A structure to specify available firmware operations. + * + * A filled up structure can be registered with register_firmware_ops(). + */ +struct firmware_ops { + /* + * Inform the firmware we intend to enter CPU idle mode + */ + int (*prepare_idle)(unsigned long mode); + /* + * Enters CPU idle mode + */ + int (*do_idle)(unsigned long mode); + /* + * Sets boot address of specified physical CPU + */ + int (*set_cpu_boot_addr)(int cpu, unsigned long boot_addr); + /* + * Gets boot address of specified physical CPU + */ + int (*get_cpu_boot_addr)(int cpu, unsigned long *boot_addr); + /* + * Boots specified physical CPU + */ + int (*cpu_boot)(int cpu); + /* + * Initializes L2 cache + */ + int (*l2x0_init)(void); + /* + * Enter system-wide suspend. + */ + int (*suspend)(void); + /* + * Restore state of privileged hardware after system-wide suspend. + */ + int (*resume)(void); +}; + +/* Global pointer for current firmware_ops structure, can't be NULL. */ +extern const struct firmware_ops *firmware_ops; + +/* + * call_firmware_op(op, ...) + * + * Checks if firmware operation is present and calls it, + * otherwise returns -ENOSYS + */ +#define call_firmware_op(op, ...) \ + ((firmware_ops->op) ? firmware_ops->op(__VA_ARGS__) : (-ENOSYS)) + +/* + * register_firmware_ops(ops) + * + * A function to register platform firmware_ops struct. + */ +static inline void register_firmware_ops(const struct firmware_ops *ops) +{ + BUG_ON(!ops); + + firmware_ops = ops; +} + +#endif |