87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
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/*
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* Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
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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 __LINUX_IMX_SEMA4_H__
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#define __LINUX_IMX_SEMA4_H__
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#define SEMA4_NUM_DEVICES 1
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#define SEMA4_NUM_GATES 16
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#define SEMA4_UNLOCK 0x00
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#define SEMA4_A9_LOCK 0x01
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#define SEMA4_GATE_MASK 0x03
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#define CORE_MUTEX_VALID (('c'<<24)|('m'<<24)|('t'<<24)|'x')
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/*
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* The enumerates
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*/
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enum {
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/* sema4 registers offset */
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SEMA4_CP0INE = 0x40,
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SEMA4_CP1INE = 0x48,
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SEMA4_CP0NTF = 0x80,
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SEMA4_CP1NTF = 0x88,
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};
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static const unsigned int idx_sema4[16] = {
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1 << 7, 1 << 6, 1 << 5, 1 << 4,
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1 << 3, 1 << 2, 1 << 1, 1 << 0,
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1 << 15, 1 << 14, 1 << 13, 1 << 12,
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1 << 11, 1 << 10, 1 << 9, 1 << 8,
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};
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struct imx_sema4_mutex {
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unsigned int valid;
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unsigned int gate_num;
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unsigned char gate_val;
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wait_queue_head_t wait_q;
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};
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struct imx_sema4_mutex_device {
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struct device *dev;
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unsigned short cpntf_val;
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unsigned short cpine_val;
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void __iomem *ioaddr; /* Mapped address */
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spinlock_t lock; /* Mutex */
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int irq;
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struct clk *clk;
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unsigned short alloced;
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struct imx_sema4_mutex *mutex_ptr[16];
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};
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extern struct imx_sema4_mutex *mcc_shm_ptr;
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struct imx_sema4_mutex *
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imx_sema4_mutex_create(u32 dev_num, u32 mutex_num);
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#ifdef CONFIG_IMX_SEMA4
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int imx_sema4_mutex_destroy(struct imx_sema4_mutex *mutex_ptr);
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int imx_sema4_mutex_trylock(struct imx_sema4_mutex *mutex_ptr);
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int imx_sema4_mutex_lock(struct imx_sema4_mutex *mutex_ptr);
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int imx_sema4_mutex_unlock(struct imx_sema4_mutex *mutex_ptr);
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#else
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static inline int imx_sema4_mutex_destroy(struct imx_sema4_mutex *mutex_ptr)
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{
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return 0;
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}
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static inline int imx_sema4_mutex_trylock(struct imx_sema4_mutex *mutex_ptr)
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{
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return 0;
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}
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static inline int imx_sema4_mutex_lock(struct imx_sema4_mutex *mutex_ptr)
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{
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return 0;
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}
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static inline int imx_sema4_mutex_unlock(struct imx_sema4_mutex *mutex_ptr)
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{
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return 0;
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}
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#endif
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#endif /* __LINUX_IMX_SEMA4_H__ */
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