LXR uboot/arch/arm/include/asm/arch-sunxi/spl.h

   1/*
   2 * (C) Copyright 2007-2011
   3 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   4 * Tom Cubie <tangliang@allwinnertech.com>
   5 *
   6 * SPDX-License-Identifier:     GPL-2.0+
   7 */
   8#ifndef _ASM_ARCH_SPL_H_
   9#define _ASM_ARCH_SPL_H_
  10
  11#define BOOT0_MAGIC             "eGON.BT0"
  12#define SPL_SIGNATURE           "SPL" /* marks "sunxi" SPL header */
  13#define SPL_HEADER_VERSION      1
  14
  15/* Note: A80 will require special handling here: SPL_ADDR 0x10000 */
  16#define SPL_ADDR                0x0
  17
  18/* boot head definition from sun4i boot code */
  19struct boot_file_head {
  20        uint32_t b_instruction; /* one intruction jumping to real code */
  21        uint8_t magic[8];       /* ="eGON.BT0" or "eGON.BT1", not C-style str */
  22        uint32_t check_sum;     /* generated by PC */
  23        uint32_t length;        /* generated by PC */
  24        /*
  25         * We use a simplified header, only filling in what is needed
  26         * by the boot ROM. To be compatible with Allwinner tools we
  27         * would need to implement the proper fields here instead of
  28         * padding.
  29         *
  30         * Actually we want the ability to recognize our "sunxi" variant
  31         * of the SPL. To do so, let's place a special signature into the
  32         * "pub_head_size" field. We can reasonably expect Allwinner's
  33         * boot0 to always have the upper 16 bits of this set to 0 (after
  34         * all the value shouldn't be larger than the limit imposed by
  35         * SRAM size).
  36         * If the signature is present (at 0x14), then we know it's safe
  37         * to use the remaining 8 bytes (at 0x18) for our own purposes.
  38         * (E.g. sunxi-tools "fel" utility can pass information there.)
  39         */
  40        union {
  41                uint32_t pub_head_size;
  42                uint8_t spl_signature[4];
  43        };
  44        uint32_t fel_script_address;
  45        uint32_t reserved;              /* padding, align to 32 bytes */
  46};
  47
  48#define is_boot0_magic(addr)    (memcmp((void *)addr, BOOT0_MAGIC, 8) == 0)
  49
  50#endif
  51