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
147
148
149
150
151
152
153
154
155
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2020 Western Digital Corporation or its affiliates
*
*/
#include <common.h>
#include <fdt_support.h>
#include <log.h>
#include <mapmem.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* riscv_fdt_copy_resv_mem_node() - Copy reserve memory node entry
* @src: Pointer to the source device tree from which reserved memory node
* needs to be copied.
* @dst: Pointer to the destination device tree to which reserved memory node
* needs to be copied.
*
* Return: 0 on success or if source doesn't have reserved memory node.
* Error if copy process failed.
*/
int riscv_fdt_copy_resv_mem_node(const void *src, void *dst)
{
u32 phandle;
struct fdt_memory pmp_mem;
fdt_addr_t addr;
fdt_size_t size;
int offset, node, err, rmem_offset;
bool nomap = true;
char basename[32] = {0};
int bname_len;
int max_len = sizeof(basename);
const char *name;
char *temp;
offset = fdt_path_offset(src, "/reserved-memory");
if (offset < 0) {
printf("No reserved memory region found in source FDT\n");
return 0;
}
fdt_for_each_subnode(node, src, offset) {
name = fdt_get_name(src, node, NULL);
addr = fdtdec_get_addr_size_auto_noparent(src, node,
"reg", 0, &size,
false);
if (addr == FDT_ADDR_T_NONE) {
debug("failed to read address/size for %s\n", name);
continue;
}
strncpy(basename, name, max_len);
temp = strchr(basename, '@');
if (temp) {
bname_len = strnlen(basename, max_len) - strnlen(temp,
max_len);
*(basename + bname_len) = '\0';
}
pmp_mem.start = addr;
pmp_mem.end = addr + size - 1;
err = fdtdec_add_reserved_memory(dst, basename, &pmp_mem,
&phandle);
if (err < 0) {
printf("failed to add reserved memory: %d\n", err);
return err;
}
if (!fdt_getprop(src, node, "no-map", NULL))
nomap = false;
if (nomap) {
rmem_offset = fdt_node_offset_by_phandle(dst, phandle);
fdt_setprop_empty(dst, rmem_offset, "no-map");
}
}
return 0;
}
/**
* riscv_board_reserved_mem_fixup() - Fix up reserved memory node for a board
* @fdt: Pointer to the device tree in which reserved memory node needs to be
* added.
*
* In RISC-V, any board needs to copy the reserved memory node from the device
* tree provided by the firmware to the device tree used by U-Boot. This is a
* common function that individual board fixup functions can invoke.
*
* Return: 0 on success or error otherwise.
*/
int riscv_board_reserved_mem_fixup(void *fdt)
{
int err;
void *src_fdt_addr;
src_fdt_addr = map_sysmem(gd->arch.firmware_fdt_addr, 0);
/* avoid the copy if we are using the same device tree */
if (src_fdt_addr == fdt)
return 0;
err = riscv_fdt_copy_resv_mem_node(src_fdt_addr, fdt);
if (err < 0)
return err;
return 0;
}
#ifdef CONFIG_OF_BOARD_FIXUP
int board_fix_fdt(void *fdt)
{
int err;
err = riscv_board_reserved_mem_fixup(fdt);
if (err < 0) {
printf("failed to fixup DT for reserved memory: %d\n", err);
return err;
}
return 0;
}
#endif
int arch_fixup_fdt(void *blob)
{
int err;
#ifdef CONFIG_EFI_LOADER
u32 size;
int chosen_offset;
size = fdt_totalsize(blob);
err = fdt_open_into(blob, blob, size + 32);
if (err < 0) {
printf("Device Tree can't be expanded to accommodate new node");
return err;
}
chosen_offset = fdt_path_offset(blob, "/chosen");
if (chosen_offset < 0) {
err = fdt_add_subnode(blob, 0, "chosen");
if (err < 0) {
printf("chosen node can not be added\n");
return err;
}
}
/* Overwrite the boot-hartid as U-Boot is the last stage BL */
fdt_setprop_u32(blob, chosen_offset, "boot-hartid", gd->arch.boot_hart);
#endif
/* Copy the reserved-memory node to the DT used by OS */
err = riscv_fdt_copy_resv_mem_node(gd->fdt_blob, blob);
if (err < 0)
return err;
return 0;
}
|
