1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * (C) Copyright 2007-2011 4 * Allwinner Technology Co., Ltd. <www.allwinnertech.com> 5 * Tom Cubie <tangliang@allwinnertech.com> 6 */ 7#ifndef _ASM_ARCH_SPL_H_ 8#define _ASM_ARCH_SPL_H_ 9 10#define BOOT0_MAGIC "eGON.BT0" 11#define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */ 12#define SPL_MAJOR_BITS 3 13#define SPL_MINOR_BITS 5 14#define SPL_VERSION(maj, min) \ 15 ((((maj) & ((1U << SPL_MAJOR_BITS) - 1)) << SPL_MINOR_BITS) | \ 16 ((min) & ((1U << SPL_MINOR_BITS) - 1))) 17 18#define SPL_HEADER_VERSION SPL_VERSION(0, 2) 19 20#define SPL_ENV_HEADER_VERSION SPL_VERSION(0, 1) 21#define SPL_DT_HEADER_VERSION SPL_VERSION(0, 2) 22#define SPL_DRAM_HEADER_VERSION SPL_VERSION(0, 3) 23 24#define SPL_ADDR CONFIG_SUNXI_SRAM_ADDRESS 25 26/* The low 8-bits of the 'boot_media' field in the SPL header */ 27#define SUNXI_BOOTED_FROM_MMC0 0 28#define SUNXI_BOOTED_FROM_NAND 1 29#define SUNXI_BOOTED_FROM_MMC2 2 30#define SUNXI_BOOTED_FROM_SPI 3 31#define SUNXI_BOOTED_FROM_MMC0_HIGH 0x10 32#define SUNXI_BOOTED_FROM_MMC2_HIGH 0x12 33 34/* boot head definition from sun4i boot code */ 35struct 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 */ 40 /* 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 44 * padding. 45 * 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 51 * SRAM size). 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.) 55 */ 56 union { 57 uint32_t pub_head_size; 58 uint8_t spl_signature[4]; 59 }; 60 uint32_t fel_script_address; /* since v0.1, set by sunxi-fel */ 61 /* 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". 66 */ 67 uint32_t fel_uEnv_length; /* since v0.1, set by sunxi-fel */ 68 /* 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 73 * to the users. 74 */ 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) */ 81}; 82 83/* Compile time check to assure proper alignment of structure */ 84typedef char boot_file_head_not_multiple_of_32[1 - 2*(sizeof(struct boot_file_head) % 32)]; 85 86#define is_boot0_magic(addr) (memcmp((void *)addr, BOOT0_MAGIC, 8) == 0) 87 88uint32_t sunxi_get_boot_device(void); 89 90#endif 91