aboutsummaryrefslogtreecommitdiff
path: root/projects/cli-test/mgmt-dfu.c
blob: c7273f415ad1d4a4154bab44ad02dfd1bdf6ed19 (plain) (blame)
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
/*
 * mgmt-dfu.c
 * ---------
 * CLI code for looking at, jumping to or erasing the loaded firmware.
 *
 * Copyright (c) 2016, NORDUnet A/S All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the NORDUnet nor the names of its contributors may
 *   be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "stm-init.h"
#include "mgmt-cli.h"
#include "stm-uart.h"
#include "stm-flash.h"
#include "mgmt-dfu.h"

#include <string.h>

#define DFU_FIRMWARE_ADDR         ((uint32_t) &CRYPTECH_FIRMWARE_START)
#define DFU_FIRMWARE_END_ADDR     ((uint32_t) &CRYPTECH_FIRMWARE_END)
#define DFU_UPLOAD_CHUNK_SIZE     256
#define HARDWARE_EARLY_DFU_JUMP   0xBADABADA

/* Linker symbols are strange in C. Make regular pointers for sanity. */
__IO uint32_t *dfu_control = &CRYPTECH_DFU_CONTROL;
__IO uint32_t *dfu_firmware = &CRYPTECH_FIRMWARE_START;
__IO uint32_t *dfu_firmware_end = &CRYPTECH_FIRMWARE_END;
/* The first word in the firmware is an address to the stack (msp) */
__IO uint32_t *dfu_msp_ptr = &CRYPTECH_FIRMWARE_START;
/* The second word in the firmware is a pointer to the code
 * (points at the Reset_Handler from the linker script).
 */
__IO uint32_t *dfu_code_ptr = &CRYPTECH_FIRMWARE_START + 1;

static int cmd_dfu_dump(struct cli_def *cli, const char *command, char *argv[], int argc)
{
    command = command;
    argv = argv;
    argc = argc;

    cli_print(cli, "First 256 bytes from DFU application address %p:\r\n", dfu_firmware);

    uart_send_hexdump((uint8_t *) dfu_firmware, 0, 0xff);
    cli_print(cli, "\n");

    return CLI_OK;
}

static int cmd_dfu_erase(struct cli_def *cli, const char *command, char *argv[], int argc)
{
    int status;

    command = command;
    argv = argv;
    argc = argc;

    cli_print(cli, "Erasing flash address %p to %p - expect the CLI to crash now",
	      dfu_firmware,
	      dfu_firmware_end);

    if ((status = stm_flash_erase_sectors((uint32_t) dfu_firmware, (uint32_t) dfu_firmware_end)) != 0) {
	cli_print(cli, "Failed erasing flash sectors (%i)", status);
    }

    return CLI_OK;
}

static int cmd_dfu_jump(struct cli_def *cli, const char *command, char *argv[], int argc)
{
    uint32_t i;

    command = command;
    argv = argv;
    argc = argc;

    /* Load first byte from the DFU_FIRMWARE_PTR to verify it contains an IVT before
     * jumping there.
     */
    cli_print(cli, "Checking for application at %p", dfu_firmware);

    i = *dfu_msp_ptr & 0xFF000000;
    /* 'new_msp' is supposed to be a pointer to the new applications stack, it should
     * point either at RAM (0x20000000) or at the CCM memory (0x10000000).
     */
    if (i == 0x20000000 || i == 0x10000000) {
	/* Set dfu_control to the magic value that will cause the us to jump to the
	 * firmware from the CLI main() function after rebooting.
	 */
	*dfu_control = HARDWARE_EARLY_DFU_JUMP;
	cli_print(cli, "Making the leap");
	HAL_NVIC_SystemReset();
	while (1) { ; }
    } else {
	cli_print(cli, "No loaded application found at %p (read 0x%x)",
		  dfu_firmware, (unsigned int) *dfu_msp_ptr);
    }

    return CLI_OK;
}

void configure_cli_dfu(struct cli_def *cli)
{
    struct cli_command *c;

    c = cli_register_command(cli, NULL, "dfu", NULL, 0, 0, NULL);

    cli_register_command(cli, c, "dump", cmd_dfu_dump, 0, 0, "Show the first 256 bytes of the loaded firmware");
    cli_register_command(cli, c, "jump", cmd_dfu_jump, 0, 0, "Jump to the loaded firmware");
    cli_register_command(cli, c, "erase", cmd_dfu_erase, 0, 0, "Erase the firmware memory (will crash the CLI)");
}