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git01.mediatek.com / filogic / atf / a70615f22f8af8351ab1e99667cfa34e952417ea / . / lib / aarch64 / xlat_helpers.c
blob: 87d24ec9fb33a0285bbaeadc79c82e4db78448db [file] [log] [blame]
Achin Guptaa0cd9892014-02-09 13:30:38 +0000[diff] [blame]1/*
2 * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * Redistributions of source code must retain the above copyright notice, this
8 * list of conditions and the following disclaimer.
9 *
10 * Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * Neither the name of ARM nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific
16 * prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <string.h>
32#include <assert.h>
33#include <arch.h>
34
35/*******************************************************************************
36 * Helper to create a level 1/2 table descriptor which points to a level 2/3
37 * table.
38 ******************************************************************************/
39unsigned long create_table_desc(unsigned long *next_table_ptr)
40{
41 unsigned long desc = (unsigned long) next_table_ptr;
42
43 /* Clear the last 12 bits */
44 desc >>= FOUR_KB_SHIFT;
45 desc <<= FOUR_KB_SHIFT;
46
47 desc |= TABLE_DESC;
48
49 return desc;
50}
51
52/*******************************************************************************
53 * Helper to create a level 1/2/3 block descriptor which maps the va to addr
54 ******************************************************************************/
55unsigned long create_block_desc(unsigned long desc,
56 unsigned long addr,
57 unsigned int level)
58{
59 switch (level) {
60 case LEVEL1:
61 desc |= (addr << FIRST_LEVEL_DESC_N) | BLOCK_DESC;
62 break;
63 case LEVEL2:
64 desc |= (addr << SECOND_LEVEL_DESC_N) | BLOCK_DESC;
65 break;
66 case LEVEL3:
67 desc |= (addr << THIRD_LEVEL_DESC_N) | TABLE_DESC;
68 break;
69 default:
70 assert(0);
71 }
72
73 return desc;
74}
75
76/*******************************************************************************
77 * Helper to create a level 1/2/3 block descriptor which maps the va to output_
78 * addr with Device nGnRE attributes.
79 ******************************************************************************/
80unsigned long create_device_block(unsigned long output_addr,
81 unsigned int level,
82 unsigned int ns)
83{
84 unsigned long upper_attrs, lower_attrs, desc;
85
86 lower_attrs = LOWER_ATTRS(ACCESS_FLAG | OSH | AP_RW);
87 lower_attrs |= LOWER_ATTRS(ns | ATTR_DEVICE_INDEX);
88 upper_attrs = UPPER_ATTRS(XN);
89 desc = upper_attrs | lower_attrs;
90
91 return create_block_desc(desc, output_addr, level);
92}
93
94/*******************************************************************************
95 * Helper to create a level 1/2/3 block descriptor which maps the va to output_
96 * addr with inner-shareable normal wbwa read-only memory attributes.
97 ******************************************************************************/
98unsigned long create_romem_block(unsigned long output_addr,
99 unsigned int level,
100 unsigned int ns)
101{
102 unsigned long upper_attrs, lower_attrs, desc;
103
104 lower_attrs = LOWER_ATTRS(ACCESS_FLAG | ISH | AP_RO);
105 lower_attrs |= LOWER_ATTRS(ns | ATTR_IWBWA_OWBWA_NTR_INDEX);
106 upper_attrs = UPPER_ATTRS(0ull);
107 desc = upper_attrs | lower_attrs;
108
109 return create_block_desc(desc, output_addr, level);
110}
111
112/*******************************************************************************
113 * Helper to create a level 1/2/3 block descriptor which maps the va to output_
114 * addr with inner-shareable normal wbwa read-write memory attributes.
115 ******************************************************************************/
116unsigned long create_rwmem_block(unsigned long output_addr,
117 unsigned int level,
118 unsigned int ns)
119{
120 unsigned long upper_attrs, lower_attrs, desc;
121
122 lower_attrs = LOWER_ATTRS(ACCESS_FLAG | ISH | AP_RW);
123 lower_attrs |= LOWER_ATTRS(ns | ATTR_IWBWA_OWBWA_NTR_INDEX);
124 upper_attrs = UPPER_ATTRS(XN);
125 desc = upper_attrs | lower_attrs;
126
127 return create_block_desc(desc, output_addr, level);
128}