1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * K2x: Secure commands file
4 *
5 * Copyright (C) 2012-2019 Texas Instruments Incorporated - https://www.ti.com/
6 */
7
8 #include <hang.h>
9 #include <image.h>
10 #include <asm/unaligned.h>
11 #include <command.h>
12 #include <mach/mon.h>
13 #include <spl.h>
14 asm(".arch_extension sec\n\t");
15
mon_install(u32 addr,u32 dpsc,u32 freq,u32 bm_addr)16 int mon_install(u32 addr, u32 dpsc, u32 freq, u32 bm_addr)
17 {
18 int result;
19
20 __asm__ __volatile__ (
21 "stmfd r13!, {lr}\n"
22 "mov r0, %1\n"
23 "mov r1, %2\n"
24 "mov r2, %3\n"
25 "mov r3, %4\n"
26 "blx r0\n"
27 "mov %0, r0\n"
28 "ldmfd r13!, {lr}\n"
29 : "=&r" (result)
30 : "r" (addr), "r" (dpsc), "r" (freq), "r" (bm_addr)
31 : "cc", "r0", "r1", "r2", "r3", "memory");
32 return result;
33 }
34
mon_power_on(int core_id,void * ep)35 int mon_power_on(int core_id, void *ep)
36 {
37 int result;
38
39 asm volatile (
40 "stmfd r13!, {lr}\n"
41 "mov r1, %1\n"
42 "mov r2, %2\n"
43 "mov r0, #0\n"
44 "smc #0\n"
45 "mov %0, r0\n"
46 "ldmfd r13!, {lr}\n"
47 : "=&r" (result)
48 : "r" (core_id), "r" (ep)
49 : "cc", "r0", "r1", "r2", "memory");
50 return result;
51 }
52
mon_power_off(int core_id)53 int mon_power_off(int core_id)
54 {
55 int result;
56
57 asm volatile (
58 "stmfd r13!, {lr}\n"
59 "mov r1, %1\n"
60 "mov r0, #1\n"
61 "smc #1\n"
62 "mov %0, r0\n"
63 "ldmfd r13!, {lr}\n"
64 : "=&r" (result)
65 : "r" (core_id)
66 : "cc", "r0", "r1", "memory");
67 return result;
68 }
69
70 #ifdef CONFIG_TI_SECURE_DEVICE
71 #define KS2_HS_SEC_HEADER_LEN 0x60
72 #define KS2_HS_SEC_TAG_OFFSET 0x34
73 #define KS2_AUTH_CMD 130
74
75 /**
76 * k2_hs_bm_auth() - Invokes security functions using a
77 * proprietary TI interface. This binary and source for
78 * this is available in the secure development package or
79 * SECDEV. For details on how to access this please refer
80 * doc/README.ti-secure
81 *
82 * @cmd: Secure monitor command
83 * @arg1: Argument for command
84 *
85 * returns non-zero value on success, zero on error
86 */
k2_hs_bm_auth(int cmd,void * arg1)87 static int k2_hs_bm_auth(int cmd, void *arg1)
88 {
89 int result;
90
91 asm volatile (
92 "stmfd r13!, {r4-r12, lr}\n"
93 "mov r0, %1\n"
94 "mov r1, %2\n"
95 "smc #2\n"
96 "mov %0, r0\n"
97 "ldmfd r13!, {r4-r12, lr}\n"
98 : "=&r" (result)
99 : "r" (cmd), "r" (arg1)
100 : "cc", "r0", "r1", "memory");
101
102 return result;
103 }
104
board_fit_image_post_process(const void * fit,int node,void ** p_image,size_t * p_size)105 void board_fit_image_post_process(const void *fit, int node, void **p_image,
106 size_t *p_size)
107 {
108 int result = 0;
109 void *image = *p_image;
110
111 if (strncmp(image + KS2_HS_SEC_TAG_OFFSET, "KEYS", 4)) {
112 printf("No signature found in image!\n");
113 hang();
114 }
115
116 result = k2_hs_bm_auth(KS2_AUTH_CMD, image);
117 if (result == 0) {
118 printf("Authentication failed!\n");
119 hang();
120 }
121
122 /*
123 * Overwrite the image headers after authentication
124 * and decryption. Update size to reflect removal
125 * of header and restore original file size.
126 */
127 *p_size = get_unaligned_le32(image + (*p_size - 4));
128 memcpy(image, image + KS2_HS_SEC_HEADER_LEN, *p_size);
129
130 /*
131 * Output notification of successful authentication to re-assure the
132 * user that the secure code is being processed as expected. However
133 * suppress any such log output in case of building for SPL and booting
134 * via YMODEM. This is done to avoid disturbing the YMODEM serial
135 * protocol transactions.
136 */
137 if (!(IS_ENABLED(CONFIG_XPL_BUILD) &&
138 IS_ENABLED(CONFIG_SPL_YMODEM_SUPPORT) &&
139 spl_boot_device() == BOOT_DEVICE_UART))
140 printf("Authentication passed\n");
141 }
142 #endif
143