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
|
/*
* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <string.h>
#include <platform_def.h>
#include <arch_helpers.h>
#include <common/debug.h>
#include <drivers/console.h>
#include <drivers/delay_timer.h>
#include <lib/mmio.h>
#include <plat_private.h>
#include <soc.h>
#include "ddr_parameter.h"
/*
* The miniloader delivers the parameters about ddr usage info from address
* 0x02000000 and the data format is defined as below figure. It tells ATF the
* areas of ddr that are used by platform, we treat them as non-secure regions
* by default. Then we should parse the other part regions and configurate them
* as secure regions to avoid illegal access.
*
* [ddr usage info data format]
* 0x02000000
* -----------------------------------------------------------------------------
* | <name> | <size> | <description> |
* -----------------------------------------------------------------------------
* | count | 4byte | the array numbers of the |
* | | | 'addr_array' and 'size_array' |
* -----------------------------------------------------------------------------
* | reserved | 4byte | just for 'addr_array' 8byte aligned |
* -----------------------------------------------------------------------------
* | addr_array[count] | per 8byte | memory region base address |
* -----------------------------------------------------------------------------
* | size_array[count] | per 8byte | memory region size (byte) |
* -----------------------------------------------------------------------------
*/
/*
* function: read parameters info(ns-regions) and try to parse s-regions info
*
* @addr: head address to the ddr usage struct from miniloader
* @max_mb: the max ddr capacity(MB) that the platform support
*/
struct param_ddr_usage ddr_region_usage_parse(uint64_t addr, uint64_t max_mb)
{
uint64_t base, top;
uint32_t i, addr_offset, size_offset;
struct param_ddr_usage p;
memset(&p, 0, sizeof(p));
/* read how many blocks of ns-regions, read from offset: 0x0 */
p.ns_nr = mmio_read_32(addr + REGION_NR_OFFSET);
if ((p.ns_nr > DDR_REGION_NR_MAX) || (p.ns_nr == 0)) {
ERROR("over or zero region, nr=%d, max=%d\n",
p.ns_nr, DDR_REGION_NR_MAX);
return p;
}
/* whole ddr regions boundary, it will be used when parse s-regions */
p.boundary = max_mb;
/* calculate ns-region base addr and size offset */
addr_offset = REGION_ADDR_OFFSET;
size_offset = REGION_ADDR_OFFSET + p.ns_nr * REGION_DATA_PER_BYTES;
/* read all ns-regions base and top address */
for (i = 0; i < p.ns_nr; i++) {
base = mmio_read_64(addr + addr_offset);
top = base + mmio_read_64(addr + size_offset);
/*
* translate byte to MB and store info,
* Miniloader will promise every ns-region is MB aligned.
*/
p.ns_base[i] = RG_SIZE_MB(base);
p.ns_top[i] = RG_SIZE_MB(top);
addr_offset += REGION_DATA_PER_BYTES;
size_offset += REGION_DATA_PER_BYTES;
}
/*
* a s-region's base starts from previous ns-region's top, and a
* s-region's top ends with next ns-region's base. maybe like this:
*
* case1: ns-regison start from 0MB
* -----------------------------------------------
* | ns0 | S0 | ns1 | S1 | ns2 |
* 0----------------------------------------------- max_mb
*
*
* case2: ns-regison not start from 0MB
* -----------------------------------------------
* | S0 | ns0 | ns1 | ns2 | S1 |
* 0----------------------------------------------- max_mb
*/
/* like above case2 figure, ns-region is not start from 0MB */
if (p.ns_base[0] != 0) {
p.s_base[p.s_nr] = 0;
p.s_top[p.s_nr] = p.ns_base[0];
p.s_nr++;
}
/*
* notice: if ns-regions not start from 0MB, p.s_nr = 1 now, otherwise 0
*/
for (i = 0; i < p.ns_nr; i++) {
/*
* if current ns-regions top covers boundary,
* that means s-regions are all parsed yet, so finsh.
*/
if (p.ns_top[i] == p.boundary)
goto out;
/* s-region's base starts from previous ns-region's top */
p.s_base[p.s_nr] = p.ns_top[i];
/* s-region's top ends with next ns-region's base */
if (i + 1 < p.ns_nr)
p.s_top[p.s_nr] = p.ns_base[i + 1];
else
p.s_top[p.s_nr] = p.boundary;
p.s_nr++;
}
out:
return p;
}
|
