cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rtlx.h (2148B)

      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
     30void rtlx_starting(int vpe);
     31void rtlx_stopping(int vpe);
     32
     33int rtlx_open(int index, int can_sleep);
     34int rtlx_release(int index);
     35ssize_t rtlx_read(int index, void __user *buff, size_t count);
     36ssize_t rtlx_write(int index, const void __user *buffer, size_t count);
     37unsigned int rtlx_read_poll(int index, int can_sleep);
     38unsigned int rtlx_write_poll(int index);
     39
     40int __init rtlx_module_init(void);
     41void __exit rtlx_module_exit(void);
     42
     43void _interrupt_sp(void);
     44
     45extern struct vpe_notifications rtlx_notify;
     46extern const struct file_operations rtlx_fops;
     47extern void (*aprp_hook)(void);
     48
     49enum rtlx_state {
     50	RTLX_STATE_UNUSED = 0,
     51	RTLX_STATE_INITIALISED,
     52	RTLX_STATE_REMOTE_READY,
     53	RTLX_STATE_OPENED
     54};
     55
     56extern 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*/
     67struct 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
     81extern 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_ */