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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * (C) Copyright 2007-2011
- * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
- * Tom Cubie <tangliang@allwinnertech.com>
- *
- * Constants and data structures used in Allwinner "eGON" images, as
- * parsed by the Boot-ROM.
- *
- * Shared between mkimage and the SPL.
- */
- #ifndef SUNXI_IMAGE_H
- #define SUNXI_IMAGE_H
- #define BOOT0_MAGIC "eGON.BT0"
- #define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */
- #define SPL_MAJOR_BITS 3
- #define SPL_MINOR_BITS 5
- #define SPL_VERSION(maj, min) \
- ((((maj) & ((1U << SPL_MAJOR_BITS) - 1)) << SPL_MINOR_BITS) | \
- ((min) & ((1U << SPL_MINOR_BITS) - 1)))
- #define SPL_HEADER_VERSION SPL_VERSION(0, 2)
- #define SPL_ENV_HEADER_VERSION SPL_VERSION(0, 1)
- #define SPL_DT_HEADER_VERSION SPL_VERSION(0, 2)
- #define SPL_DRAM_HEADER_VERSION SPL_VERSION(0, 3)
- /* boot head definition from sun4i boot code */
- struct boot_file_head {
- uint32_t b_instruction; /* one intruction jumping to real code */
- uint8_t magic[8]; /* ="eGON.BT0" or "eGON.BT1", not C-style str */
- uint32_t check_sum; /* generated by PC */
- uint32_t length; /* generated by PC */
- /*
- * We use a simplified header, only filling in what is needed
- * by the boot ROM. To be compatible with Allwinner tools we
- * would need to implement the proper fields here instead of
- * padding.
- *
- * Actually we want the ability to recognize our "sunxi" variant
- * of the SPL. To do so, let's place a special signature into the
- * "pub_head_size" field. We can reasonably expect Allwinner's
- * boot0 to always have the upper 16 bits of this set to 0 (after
- * all the value shouldn't be larger than the limit imposed by
- * SRAM size).
- * If the signature is present (at 0x14), then we know it's safe
- * to use the remaining 8 bytes (at 0x18) for our own purposes.
- * (E.g. sunxi-tools "fel" utility can pass information there.)
- */
- union {
- uint32_t pub_head_size;
- uint8_t spl_signature[4];
- };
- uint32_t fel_script_address; /* since v0.1, set by sunxi-fel */
- /*
- * If the fel_uEnv_length member below is set to a non-zero value,
- * it specifies the size (byte count) of data at fel_script_address.
- * At the same time this indicates that the data is in uEnv.txt
- * compatible format, ready to be imported via "env import -t".
- */
- uint32_t fel_uEnv_length; /* since v0.1, set by sunxi-fel */
- /*
- * Offset of an ASCIIZ string (relative to the SPL header), which
- * contains the default device tree name (CONFIG_DEFAULT_DEVICE_TREE).
- * This is optional and may be set to NULL. Is intended to be used
- * by flash programming tools for providing nice informative messages
- * to the users.
- */
- uint32_t dt_name_offset; /* since v0.2, set by mksunxiboot */
- uint32_t dram_size; /* in MiB, since v0.3, set by SPL */
- uint32_t boot_media; /* written here by the boot ROM */
- /* A padding area (may be used for storing text strings) */
- uint32_t string_pool[13]; /* since v0.2, filled by mksunxiboot */
- /* The header must be a multiple of 32 bytes (for VBAR alignment) */
- };
- /* Compile time check to assure proper alignment of structure */
- typedef char boot_file_head_not_multiple_of_32[1 - 2*(sizeof(struct boot_file_head) % 32)];
- #endif
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