Skip to content

GitLab

Switch branch/tag
Find file Normal viewHistoryPermalink
xlat_helpers.c 4.7 KB
Newer Older
Achin Gupta's avatar
Factor out translation table setup in ARM FVP port    
Achin Gupta committed
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 
/*
 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
 *
 * 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 ARM 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 THE 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 <arch.h>
Dan Handley's avatar
Reduce deep nesting of header files    
Dan Handley committed
32 
#include <assert.h>
Achin Gupta's avatar
Factor out translation table setup in ARM FVP port    
Achin Gupta committed
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 

/*******************************************************************************
 * Helper to create a level 1/2 table descriptor which points to a level 2/3
 * table.
 ******************************************************************************/
unsigned long create_table_desc(unsigned long *next_table_ptr)
{
	unsigned long desc = (unsigned long) next_table_ptr;

	/* Clear the last 12 bits */
	desc >>= FOUR_KB_SHIFT;
	desc <<= FOUR_KB_SHIFT;

	desc |= TABLE_DESC;

	return desc;
}

/*******************************************************************************
 * Helper to create a level 1/2/3 block descriptor which maps the va to addr
 ******************************************************************************/
unsigned long create_block_desc(unsigned long desc,
				unsigned long addr,
				unsigned int level)
{
	switch (level) {
	case LEVEL1:
		desc |= (addr << FIRST_LEVEL_DESC_N) | BLOCK_DESC;
		break;
	case LEVEL2:
		desc |= (addr << SECOND_LEVEL_DESC_N) | BLOCK_DESC;
		break;
	case LEVEL3:
		desc |= (addr << THIRD_LEVEL_DESC_N) | TABLE_DESC;
		break;
	default:
		assert(0);
	}

	return desc;
}

/*******************************************************************************
 * Helper to create a level 1/2/3 block descriptor which maps the va to output_
 * addr with Device nGnRE attributes.
 ******************************************************************************/
unsigned long create_device_block(unsigned long output_addr,
				  unsigned int level,
				  unsigned int ns)
{
	unsigned long upper_attrs, lower_attrs, desc;

	lower_attrs = LOWER_ATTRS(ACCESS_FLAG | OSH | AP_RW);
	lower_attrs |= LOWER_ATTRS(ns | ATTR_DEVICE_INDEX);
	upper_attrs = UPPER_ATTRS(XN);
	desc = upper_attrs | lower_attrs;

	return create_block_desc(desc, output_addr, level);
}

/*******************************************************************************
 * Helper to create a level 1/2/3 block descriptor which maps the va to output_
 * addr with inner-shareable normal wbwa read-only memory attributes.
 ******************************************************************************/
unsigned long create_romem_block(unsigned long output_addr,
				 unsigned int level,
				 unsigned int ns)
{
	unsigned long upper_attrs, lower_attrs, desc;

	lower_attrs = LOWER_ATTRS(ACCESS_FLAG | ISH | AP_RO);
	lower_attrs |= LOWER_ATTRS(ns | ATTR_IWBWA_OWBWA_NTR_INDEX);
	upper_attrs = UPPER_ATTRS(0ull);
	desc = upper_attrs | lower_attrs;

	return create_block_desc(desc, output_addr, level);
}

/*******************************************************************************
 * Helper to create a level 1/2/3 block descriptor which maps the va to output_
 * addr with inner-shareable normal wbwa read-write memory attributes.
 ******************************************************************************/
unsigned long create_rwmem_block(unsigned long output_addr,
				 unsigned int level,
				 unsigned int ns)
{
	unsigned long upper_attrs, lower_attrs, desc;

	lower_attrs = LOWER_ATTRS(ACCESS_FLAG | ISH | AP_RW);
	lower_attrs |= LOWER_ATTRS(ns | ATTR_IWBWA_OWBWA_NTR_INDEX);
	upper_attrs = UPPER_ATTRS(XN);
	desc = upper_attrs | lower_attrs;

	return create_block_desc(desc, output_addr, level);
}