A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 *
9 * Copyright (C) 2017 by Amaury Pouly
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 *
16 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
17 * KIND, either express or implied.
18 *
19 ****************************************************************************/
20#ifndef __RB_BOOTDATA__
21#define __RB_BOOTDATA__
22
23#ifndef __ASSEMBLER__
24#include <stdint.h>
25#include "system.h"
26#endif
27
28/* /!\ This file can be included in assembly files /!\ */
29
30/** The boot data will be filled by the bootloader with information that might
31 * be relevant for Rockbox. The bootloader will search for the structure using
32 * the magic header within the first BOOT_DATA_SEARCH_SIZE bytes of the binary.
33 * Typically, this structure should be as close as possible to the entry point */
34
35/* Search size for the data structure after entry point */
36#define BOOT_DATA_SEARCH_SIZE 1024
37
38#define BOOT_DATA_MAGIC0 ('r' | 'b' << 8 | 'm' << 16 | 'a' << 24)
39#define BOOT_DATA_MAGIC1 ('g' | 'i' << 8 | 'c' << 16 | '!' << 24)
40#define BOOT_DATA_VERSION 1
41
42/* maximum size of payload */
43#define BOOT_DATA_PAYLOAD_SIZE 4
44
45#ifndef __ASSEMBLER__
46/* This is the C structure */
47struct boot_data_t
48{
49 union
50 {
51 uint32_t crc; /* crc of payload data (CRC32 with 0xffffffff for initial value) */
52 uint32_t magic[2]; /* BOOT_DATA_MAGIC0/1 */
53 };
54
55 uint32_t length; /* length of the payload */
56
57 /* add fields here */
58 union
59 {
60 struct
61 {
62 uint8_t _boot_volume; /* IGNORED */
63 uint8_t version;
64 uint8_t boot_drive;
65 uint8_t boot_partition;
66 };
67 uint8_t payload[BOOT_DATA_PAYLOAD_SIZE];
68 };
69} __attribute__((packed));
70
71#if !defined(BOOTLOADER)
72extern struct boot_data_t boot_data;
73extern bool boot_data_valid;
74
75void verify_boot_data(void) INIT_ATTR;
76#endif
77#else /* __ASSEMBLER__ */
78
79/* This assembler macro implements an empty boot structure with just the magic
80 * string */
81.macro put_boot_data_here
82.global boot_data
83boot_data:
84 .word BOOT_DATA_MAGIC0
85 .word BOOT_DATA_MAGIC1
86 .word BOOT_DATA_PAYLOAD_SIZE
87 .byte 0xff /* boot volume */
88 .byte BOOT_DATA_VERSION /* maximum supported boot protocol version */
89 .space (BOOT_DATA_PAYLOAD_SIZE - 2), 0xff /* remainder of payload */
90.endm
91
92#endif
93
94#endif /* __RB_BOOTDATA__ */