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
|
/*
* K2HK: secure kernel command file
*
* (C) Copyright 2012-2014
* Texas Instruments Incorporated, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <mach/mon.h>
#include <spl.h>
asm(".arch_extension sec\n\t");
int mon_install(u32 addr, u32 dpsc, u32 freq, u32 bm_addr)
{
int result;
__asm__ __volatile__ (
"stmfd r13!, {lr}\n"
"mov r0, %1\n"
"mov r1, %2\n"
"mov r2, %3\n"
"mov r3, %4\n"
"blx r0\n"
"mov %0, r0\n"
"ldmfd r13!, {lr}\n"
: "=&r" (result)
: "r" (addr), "r" (dpsc), "r" (freq), "r" (bm_addr)
: "cc", "r0", "r1", "r2", "r3", "memory");
return result;
}
int mon_power_on(int core_id, void *ep)
{
int result;
asm volatile (
"stmfd r13!, {lr}\n"
"mov r1, %1\n"
"mov r2, %2\n"
"mov r0, #0\n"
"smc #0\n"
"mov %0, r0\n"
"ldmfd r13!, {lr}\n"
: "=&r" (result)
: "r" (core_id), "r" (ep)
: "cc", "r0", "r1", "r2", "memory");
return result;
}
int mon_power_off(int core_id)
{
int result;
asm volatile (
"stmfd r13!, {lr}\n"
"mov r1, %1\n"
"mov r0, #1\n"
"smc #1\n"
"mov %0, r0\n"
"ldmfd r13!, {lr}\n"
: "=&r" (result)
: "r" (core_id)
: "cc", "r0", "r1", "memory");
return result;
}
#ifdef CONFIG_TI_SECURE_DEVICE
#define KS2_HS_SEC_HEADER_LEN 0x60
#define KS2_HS_SEC_TAG_OFFSET 0x34
#define KS2_AUTH_CMD 130
/**
* k2_hs_bm_auth() - Invokes security functions using a
* proprietary TI interface. This binary and source for
* this is available in the secure development package or
* SECDEV. For details on how to access this please refer
* doc/README.ti-secure
*
* @cmd: Secure monitor command
* @arg1: Argument for command
*
* returns non-zero value on success, zero on error
*/
static int k2_hs_bm_auth(int cmd, void *arg1)
{
int result;
asm volatile (
"stmfd r13!, {r4-r12, lr}\n"
"mov r0, %1\n"
"mov r1, %2\n"
"smc #2\n"
"mov %0, r0\n"
"ldmfd r13!, {r4-r12, lr}\n"
: "=&r" (result)
: "r" (cmd), "r" (arg1)
: "cc", "r0", "r1", "memory");
return result;
}
void board_fit_image_post_process(void **p_image, size_t *p_size)
{
int result = 0;
void *image = *p_image;
if (strncmp(image + KS2_HS_SEC_TAG_OFFSET, "KEYS", 4)) {
printf("No signature found in image!\n");
hang();
}
result = k2_hs_bm_auth(KS2_AUTH_CMD, image);
if (result == 0) {
printf("Authentication failed!\n");
hang();
}
/*
* Overwrite the image headers after authentication
* and decryption. Update size to reflect removal
* of header.
*/
*p_size -= KS2_HS_SEC_HEADER_LEN;
memcpy(image, image + KS2_HS_SEC_HEADER_LEN, *p_size);
/*
* Output notification of successful authentication to re-assure the
* user that the secure code is being processed as expected. However
* suppress any such log output in case of building for SPL and booting
* via YMODEM. This is done to avoid disturbing the YMODEM serial
* protocol transactions.
*/
if (!(IS_ENABLED(CONFIG_SPL_BUILD) &&
IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
spl_boot_device() == BOOT_DEVICE_UART))
printf("Authentication passed\n");
}
#endif
|
