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Linux/arch/mips/include/asm/rtlx.h

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  1 /*
  2  * This file is subject to the terms and conditions of the GNU General Public
  3  * License.  See the file "COPYING" in the main directory of this archive
  4  * for more details.
  5  *
  6  * Copyright (C) 2004, 2005 MIPS Technologies, Inc.  All rights reserved.
  7  * Copyright (C) 2013 Imagination Technologies Ltd.
  8  */
  9 #ifndef __ASM_RTLX_H_
 10 #define __ASM_RTLX_H_
 11 
 12 #include <irq.h>
 13 
 14 #define RTLX_MODULE_NAME "rtlx"
 15 
 16 #define LX_NODE_BASE 10
 17 
 18 #define MIPS_CPU_RTLX_IRQ 0
 19 
 20 #define RTLX_VERSION 2
 21 #define RTLX_xID 0x12345600
 22 #define RTLX_ID (RTLX_xID | RTLX_VERSION)
 23 #define RTLX_BUFFER_SIZE 2048
 24 #define RTLX_CHANNELS 8
 25 
 26 #define RTLX_CHANNEL_STDIO      0
 27 #define RTLX_CHANNEL_DBG        1
 28 #define RTLX_CHANNEL_SYSIO      2
 29 
 30 void rtlx_starting(int vpe);
 31 void rtlx_stopping(int vpe);
 32 
 33 int rtlx_open(int index, int can_sleep);
 34 int rtlx_release(int index);
 35 ssize_t rtlx_read(int index, void __user *buff, size_t count);
 36 ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
 37 unsigned int rtlx_read_poll(int index, int can_sleep);
 38 unsigned int rtlx_write_poll(int index);
 39 
 40 int __init rtlx_module_init(void);
 41 void __exit rtlx_module_exit(void);
 42 
 43 void _interrupt_sp(void);
 44 
 45 extern struct vpe_notifications rtlx_notify;
 46 extern const struct file_operations rtlx_fops;
 47 extern void (*aprp_hook)(void);
 48 
 49 enum rtlx_state {
 50         RTLX_STATE_UNUSED = 0,
 51         RTLX_STATE_INITIALISED,
 52         RTLX_STATE_REMOTE_READY,
 53         RTLX_STATE_OPENED
 54 };
 55 
 56 extern struct chan_waitqueues {
 57         wait_queue_head_t rt_queue;
 58         wait_queue_head_t lx_queue;
 59         atomic_t in_open;
 60         struct mutex mutex;
 61 } channel_wqs[RTLX_CHANNELS];
 62 
 63 /* each channel supports read and write.
 64    linux (vpe0) reads lx_buffer and writes rt_buffer
 65    SP (vpe1) reads rt_buffer and writes lx_buffer
 66 */
 67 struct rtlx_channel {
 68         enum rtlx_state rt_state;
 69         enum rtlx_state lx_state;
 70 
 71         int buffer_size;
 72 
 73         /* read and write indexes per buffer */
 74         int rt_write, rt_read;
 75         char *rt_buffer;
 76 
 77         int lx_write, lx_read;
 78         char *lx_buffer;
 79 };
 80 
 81 extern struct rtlx_info {
 82         unsigned long id;
 83         enum rtlx_state state;
 84         int ap_int_pending;     /* Status of 0 or 1 for CONFIG_MIPS_CMP only */
 85 
 86         struct rtlx_channel channel[RTLX_CHANNELS];
 87 } *rtlx;
 88 #endif /* __ASM_RTLX_H_ */
 89 

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