summaryrefslogtreecommitdiff
path: root/gp2x/warm.c
blob: 197df0f80d9f5ae7254ba1164d7ccbf3ccf978b8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/*
 * wARM - exporting ARM processor specific privileged services to userspace
 * userspace part
 *
 * Copyright (c) Gražvydas "notaz" Ignotas, 2009
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the organization nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/utsname.h>
#include <errno.h>

#define WARM_CODE
#include "warm.h"
#include "sys_cacheflush.h"

static int warm_fd = -1;

int warm_init(void)
{
	struct utsname unm;
	char buff[128];

	warm_fd = open("/proc/warm", O_RDWR);
	if (warm_fd >= 0)
		return 0;

	memset(&unm, 0, sizeof(unm));
	uname(&unm);
	snprintf(buff, sizeof(buff), "/sbin/insmod warm_%s.ko", unm.release);

	/* try to insmod */
	system(buff);
	warm_fd = open("/proc/warm", O_RDWR);
	if (warm_fd >= 0)
		return 0;

	fprintf(stderr, "wARM: can't init, acting as sys_cacheflush wrapper\n");
	return -1;
}

void warm_finish(void)
{
	if (warm_fd >= 0)
		close(warm_fd);
	system("rmmod warm");
}

int warm_cache_op_range(int op, void *addr, unsigned long size)
{
	struct warm_cache_op wop;
	int ret;

	if (warm_fd < 0) {
		sys_cacheflush(addr, (char *)addr + size);
		return -1;
	}

	wop.ops = op;
	wop.addr = (unsigned long)addr;
	wop.size = size;

	ret = ioctl(warm_fd, WARMC_CACHE_OP, &wop);
	if (ret != 0) {
		perror("WARMC_CACHE_OP failed");
		return -1;
	}

	return 0;
}

int warm_cache_op_all(int op)
{
	return warm_cache_op_range(op, NULL, (size_t)-1);
}

int warm_change_cb_range(int cb, int is_set, void *addr, unsigned long size)
{
	struct warm_change_cb ccb;
	int ret;

	if (warm_fd < 0)
		return -1;
	
	ccb.addr = (unsigned long)addr;
	ccb.size = size;
	ccb.cb = cb;
	ccb.is_set = is_set;

	ret = ioctl(warm_fd, WARMC_CHANGE_CB, &ccb);
	if (ret != 0) {
		perror("WARMC_CHANGE_CB failed");
		return -1;
	}

	return 0;
}

int warm_change_cb_upper(int cb, int is_set)
{
	return warm_change_cb_range(cb, is_set, 0, 0);
}

unsigned long warm_virt2phys(const void *ptr)
{
	unsigned long ptrio;
	int ret;

	ptrio = (unsigned long)ptr;
	ret = ioctl(warm_fd, WARMC_VIRT2PHYS, &ptrio);
	if (ret != 0) {
		perror("WARMC_VIRT2PHYS failed");
		return (unsigned long)-1;
	}

	return ptrio;
}