summaryrefslogtreecommitdiff
path: root/arch/arm/mach-omap2/fdt-common.c
blob: 9297e9db487c353b0880be32a8724cd0ac3eee5b (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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/*
 * Copyright 2016-2017 Texas Instruments, Inc.
 *
 * SPDX-License-Identifier: GPL-2.0+
 */

#include <common.h>
#include <libfdt.h>
#include <fdt_support.h>

#include <asm/omap_common.h>
#include <asm/omap_sec_common.h>

#ifdef CONFIG_TI_SECURE_DEVICE

/* Give zero values if not already defined */
#ifndef TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ
#define TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ (0)
#endif
#ifndef CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ
#define CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ (0)
#endif

int ft_hs_disable_rng(void *fdt, bd_t *bd)
{
	const char *path;
	int offs;
	int ret;

	/* Make HW RNG reserved for secure world use */
	path = "/ocp/rng";
	offs = fdt_path_offset(fdt, path);
	if (offs < 0) {
		debug("Node %s not found.\n", path);
		return 0;
	}
	ret = fdt_setprop_string(fdt, offs,
				 "status", "disabled");
	if (ret < 0) {
		printf("Could not add status property to node %s: %s\n",
		       path, fdt_strerror(ret));
		return ret;
	}
	return 0;
}

#if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE != 0)
/*
 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
 */
static int fdt_pack_reg(const void *fdt, void *buf, u64 address, u64 size)
{
	int address_cells = fdt_address_cells(fdt, 0);
	int size_cells = fdt_size_cells(fdt, 0);
	char *p = buf;

	if (address_cells == 2)
		*(fdt64_t *)p = cpu_to_fdt64(address);
	else
		*(fdt32_t *)p = cpu_to_fdt32(address);
	p += 4 * address_cells;

	if (size_cells == 2)
		*(fdt64_t *)p = cpu_to_fdt64(size);
	else
		*(fdt32_t *)p = cpu_to_fdt32(size);
	p += 4 * size_cells;

	return p - (char *)buf;
}

int ft_hs_fixup_dram(void *fdt, bd_t *bd)
{
	const char *path, *subpath;
	int offs, len;
	u32 sec_mem_start = get_sec_mem_start();
	u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
	fdt32_t address_cells = cpu_to_fdt32(fdt_address_cells(fdt, 0));
	fdt32_t size_cells = cpu_to_fdt32(fdt_size_cells(fdt, 0));
	u8 temp[16]; /* Up to 64-bit address + 64-bit size */

	/* Delete any original secure_reserved node */
	path = "/reserved-memory/secure_reserved";
	offs = fdt_path_offset(fdt, path);
	if (offs >= 0)
		fdt_del_node(fdt, offs);

	/* Add new secure_reserved node */
	path = "/reserved-memory";
	offs = fdt_path_offset(fdt, path);
	if (offs < 0) {
		debug("Node %s not found\n", path);
		path = "/";
		subpath = "reserved-memory";
		offs = fdt_path_offset(fdt, path);
		offs = fdt_add_subnode(fdt, offs, subpath);
		if (offs < 0) {
			printf("Could not create %s%s node.\n", path, subpath);
			return 1;
		}
		path = "/reserved-memory";
		offs = fdt_path_offset(fdt, path);

		fdt_setprop(fdt, offs, "#address-cells", &address_cells, sizeof(address_cells));
		fdt_setprop(fdt, offs, "#size-cells", &size_cells, sizeof(size_cells));
		fdt_setprop(fdt, offs, "ranges", NULL, 0);
	}

	subpath = "secure_reserved";
	offs = fdt_add_subnode(fdt, offs, subpath);
	if (offs < 0) {
		printf("Could not create %s%s node.\n", path, subpath);
		return 1;
	}

	fdt_setprop_string(fdt, offs, "compatible", "ti,secure-memory");
	fdt_setprop_string(fdt, offs, "status", "okay");
	fdt_setprop(fdt, offs, "no-map", NULL, 0);
	len = fdt_pack_reg(fdt, temp, sec_mem_start, sec_mem_size);
	fdt_setprop(fdt, offs, "reg", temp, len);

	return 0;
}
#else
int ft_hs_fixup_dram(void *fdt, bd_t *bd) { return 0; }
#endif

int ft_hs_add_tee(void *fdt, bd_t *bd)
{
	const char *path, *subpath;
	int offs;

	extern int tee_loaded;
	if (!tee_loaded)
		return 0;

	path = "/firmware";
	offs = fdt_path_offset(fdt, path);
	if (offs < 0) {
		path = "/";
		offs = fdt_path_offset(fdt, path);
		if (offs < 0) {
			printf("Could not find root node.\n");
			return 1;
		}

		subpath = "firmware";
		offs = fdt_add_subnode(fdt, offs, subpath);
		if (offs < 0) {
			printf("Could not create %s node.\n", subpath);
			return 1;
		}
	}

	subpath = "optee";
	offs = fdt_add_subnode(fdt, offs, subpath);
	if (offs < 0) {
		printf("Could not create %s node.\n", subpath);
		return 1;
	}

	fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz");
	fdt_setprop_string(fdt, offs, "method", "smc");

	return 0;
}

#endif