1 /***************************************************************************//**
2 * \file main.c
3 * \version 1.0
4 ********************************************************************************
5 * \copyright
6 * SPDX-License-Identifier: Apache-2.0
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 *******************************************************************************/
20 /* Cypress pdl headers */
21 #include "cy_pdl.h"
22 #include "cy_retarget_io_pdl.h"
23 #include "cy_result.h"
24
25 #include "cycfg_clocks.h"
26 #include "cycfg_peripherals.h"
27 #include "cycfg_pins.h"
28
29 #include "flash_qspi.h"
30 #include "sysflash/sysflash.h"
31 #include "flash_map_backend/flash_map_backend.h"
32
33 #include "bootutil/image.h"
34 #include "bootutil/bootutil.h"
35 #include "bootutil/sign_key.h"
36
37 #include "bootutil/bootutil_log.h"
38
39 #include "bootutil/fault_injection_hardening.h"
40
41 #include "watchdog.h"
42
43 /* WDT time out for reset mode, in milliseconds. */
44 #define WDT_TIME_OUT_MS 4000
45
46 /* Define pins for UART debug output */
47 #define CYBSP_UART_ENABLED 1U
48 #define CYBSP_UART_HW SCB5
49 #define CYBSP_UART_IRQ scb_5_interrupt_IRQn
50
51 #ifdef CY_BOOT_USE_EXTERNAL_FLASH
52 /* Choose SMIF slot number (slave select).
53 * Acceptable values are:
54 * 0 - SMIF disabled (no external memory);
55 * 1, 2, 3 or 4 - slave select line memory module is connected to.
56 */
57 uint32_t smif_id = 1; /* Assume SlaveSelect_0 is used for External Memory */
58 #endif
59
60
61 void hw_deinit(void);
62
do_boot(struct boot_rsp * rsp)63 static void do_boot(struct boot_rsp *rsp)
64 {
65 uint32_t app_addr = 0;
66
67 app_addr = (rsp->br_image_off + rsp->br_hdr->ih_hdr_size);
68
69 BOOT_LOG_INF("Starting User Application on CM4 (wait)...");
70 BOOT_LOG_INF("Start Address: 0x%08lx", app_addr);
71 BOOT_LOG_INF("Deinitializing hardware...");
72
73 cy_retarget_io_wait_tx_complete(CYBSP_UART_HW, 10);
74
75 hw_deinit();
76
77 Cy_SysEnableCM4(app_addr);
78 }
79
main(void)80 int main(void)
81 {
82 struct boot_rsp rsp;
83 cy_rslt_t rc = CY_RSLT_TYPE_ERROR;
84 bool boot_succeeded = false;
85 FIH_DECLARE(fih_rc, FIH_FAILURE);
86
87 SystemInit();
88 //init_cycfg_clocks();
89 init_cycfg_peripherals();
90 init_cycfg_pins();
91
92 /* Certain PSoC 6 devices enable CM4 by default at startup. It must be
93 * either disabled or enabled & running a valid application for flash write
94 * to work from CM0+. Since flash write may happen in boot_go() for updating
95 * the image before this bootloader app can enable CM4 in do_boot(), we need
96 * to keep CM4 disabled. Note that debugging of CM4 is not supported when it
97 * is disabled.
98 */
99 #if defined(CY_DEVICE_PSOC6ABLE2)
100 if (CY_SYS_CM4_STATUS_ENABLED == Cy_SysGetCM4Status())
101 {
102 Cy_SysDisableCM4();
103 }
104 #endif /* #if defined(CY_DEVICE_PSOC6ABLE2) */
105
106 /* enable interrupts */
107 __enable_irq();
108
109 /* Initialize retarget-io to use the debug UART port (CYBSP_UART_HW) */
110 rc = cy_retarget_io_pdl_init(115200u);
111
112 if (rc != CY_RSLT_SUCCESS)
113 {
114 CY_ASSERT(0);
115 }
116
117 BOOT_LOG_INF("MCUBoot Bootloader Started");
118
119 #ifdef CY_BOOT_USE_EXTERNAL_FLASH
120 rc = CY_SMIF_CMD_NOT_FOUND;
121
122 #undef MCUBOOT_MAX_IMG_SECTORS
123 /* redefine number of sectors as there 2MB will be
124 * available on PSoC062-2M in case of external
125 * memory usage */
126 #define MCUBOOT_MAX_IMG_SECTORS 4096
127 rc = qspi_init_sfdp(smif_id);
128 if (rc == CY_SMIF_SUCCESS)
129 {
130 BOOT_LOG_INF("External Memory initialized w/ SFDP.");
131 }
132 else
133 {
134 BOOT_LOG_ERR("External Memory initialization w/ SFDP FAILED: 0x%02x", (int)rc);
135 }
136 if (CY_SMIF_SUCCESS == rc)
137 #endif
138 {
139
140 FIH_CALL(boot_go, fih_rc, &rsp);
141 if (FIH_EQ(fih_rc, FIH_SUCCESS))
142 {
143 BOOT_LOG_INF("User Application validated successfully");
144 /* initialize watchdog timer. it should be updated from user app
145 * to mark successful start up of this app. if the watchdog is not updated,
146 * reset will be initiated by watchdog timer and swap revert operation started
147 * to roll back to operable image.
148 */
149 cy_wdg_init(WDT_TIME_OUT_MS);
150 do_boot(&rsp);
151 boot_succeeded = true;
152 }
153 else
154 {
155 BOOT_LOG_INF("MCUBoot Bootloader found none of bootable images");
156 }
157 }
158
159 while (1)
160 {
161 if (boot_succeeded) {
162 Cy_SysPm_CpuEnterDeepSleep(CY_SYSPM_WAIT_FOR_INTERRUPT);
163 }
164 else {
165 __WFI();
166 }
167 }
168
169 return 0;
170 }
171
hw_deinit(void)172 void hw_deinit(void)
173 {
174 cy_retarget_io_pdl_deinit();
175 Cy_GPIO_Port_Deinit(CYBSP_UART_RX_PORT);
176 Cy_GPIO_Port_Deinit(CYBSP_UART_TX_PORT);
177
178 #ifdef CY_BOOT_USE_EXTERNAL_FLASH
179 qspi_deinit(smif_id);
180 #endif
181 }
182
