1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2007-2011
4 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
5 * Tom Cubie <tangliang@allwinnertech.com>
7 * Constants and data structures used in Allwinner "eGON" images, as
8 * parsed by the Boot-ROM.
10 * Shared between mkimage and the SPL.
16 #include <linux/compiler_attributes.h>
17 #include <linux/types.h>
19 #define BOOT0_MAGIC "eGON.BT0"
20 #define BROM_STAMP_VALUE 0x5f0a6c39
21 #define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */
22 #define SPL_MAJOR_BITS 3
23 #define SPL_MINOR_BITS 5
24 #define SPL_VERSION(maj, min) \
25 ((((maj) & ((1U << SPL_MAJOR_BITS) - 1)) << SPL_MINOR_BITS) | \
26 ((min) & ((1U << SPL_MINOR_BITS) - 1)))
28 #define SPL_HEADER_VERSION SPL_VERSION(0, 2)
30 #define SPL_ENV_HEADER_VERSION SPL_VERSION(0, 1)
31 #define SPL_DT_HEADER_VERSION SPL_VERSION(0, 2)
32 #define SPL_DRAM_HEADER_VERSION SPL_VERSION(0, 3)
34 /* boot head definition from sun4i boot code */
35 struct boot_file_head {
36 uint32_t b_instruction; /* one intruction jumping to real code */
37 uint8_t magic[8]; /* ="eGON.BT0" or "eGON.BT1", not C-style str */
38 uint32_t check_sum; /* generated by PC */
39 uint32_t length; /* generated by PC */
41 * We use a simplified header, only filling in what is needed
42 * by the boot ROM. To be compatible with Allwinner tools we
43 * would need to implement the proper fields here instead of
46 * Actually we want the ability to recognize our "sunxi" variant
47 * of the SPL. To do so, let's place a special signature into the
48 * "pub_head_size" field. We can reasonably expect Allwinner's
49 * boot0 to always have the upper 16 bits of this set to 0 (after
50 * all the value shouldn't be larger than the limit imposed by
52 * If the signature is present (at 0x14), then we know it's safe
53 * to use the remaining 8 bytes (at 0x18) for our own purposes.
54 * (E.g. sunxi-tools "fel" utility can pass information there.)
57 uint32_t pub_head_size;
58 uint8_t spl_signature[4];
60 uint32_t fel_script_address; /* since v0.1, set by sunxi-fel */
62 * If the fel_uEnv_length member below is set to a non-zero value,
63 * it specifies the size (byte count) of data at fel_script_address.
64 * At the same time this indicates that the data is in uEnv.txt
65 * compatible format, ready to be imported via "env import -t".
67 uint32_t fel_uEnv_length; /* since v0.1, set by sunxi-fel */
69 * Offset of an ASCIIZ string (relative to the SPL header), which
70 * contains the default device tree name (CONFIG_DEFAULT_DEVICE_TREE).
71 * This is optional and may be set to NULL. Is intended to be used
72 * by flash programming tools for providing nice informative messages
75 uint32_t dt_name_offset; /* since v0.2, set by mksunxiboot */
76 uint32_t dram_size; /* in MiB, since v0.3, set by SPL */
77 uint32_t boot_media; /* written here by the boot ROM */
78 /* A padding area (may be used for storing text strings) */
79 uint32_t string_pool[13]; /* since v0.2, filled by mksunxiboot */
80 /* The header must be a multiple of 32 bytes (for VBAR alignment) */
83 /* Compile time check to assure proper alignment of structure */
84 typedef char boot_file_head_not_multiple_of_32[1 - 2*(sizeof(struct boot_file_head) % 32)];
86 struct __packed toc0_main_info {
99 #define TOC0_MAIN_INFO_NAME "TOC0.GLH"
100 #define TOC0_MAIN_INFO_MAGIC 0x89119800
101 #define TOC0_MAIN_INFO_END "MIE;"
103 struct __packed toc0_item_info {
114 #define TOC0_ITEM_INFO_NAME_CERT 0x00010101
115 #define TOC0_ITEM_INFO_NAME_FIRMWARE 0x00010202
116 #define TOC0_ITEM_INFO_NAME_KEY 0x00010303
117 #define TOC0_ITEM_INFO_END "IIE;"