1cba69eeeSIan Campbell /* 2e954eb80SBernhard Nortmann * (C) Copyright 2007-2011 3e954eb80SBernhard Nortmann * Allwinner Technology Co., Ltd. <www.allwinnertech.com> 4e954eb80SBernhard Nortmann * Tom Cubie <tangliang@allwinnertech.com> 5cba69eeeSIan Campbell * 6cba69eeeSIan Campbell * SPDX-License-Identifier: GPL-2.0+ 7cba69eeeSIan Campbell */ 8cba69eeeSIan Campbell #ifndef _ASM_ARCH_SPL_H_ 9ed6c7f7fSJeroen Hofstee #define _ASM_ARCH_SPL_H_ 10cba69eeeSIan Campbell 11e954eb80SBernhard Nortmann #define BOOT0_MAGIC "eGON.BT0" 12a1884381SBernhard Nortmann #define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */ 13a1884381SBernhard Nortmann #define SPL_HEADER_VERSION 1 14e954eb80SBernhard Nortmann 15d96ebc46SSiarhei Siamashka #if defined(CONFIG_MACH_SUN9I) || defined(CONFIG_MACH_SUN50I) 16d96ebc46SSiarhei Siamashka #define SPL_ADDR 0x10000 17d96ebc46SSiarhei Siamashka #else 18af654d14SBernhard Nortmann #define SPL_ADDR 0x0 19d96ebc46SSiarhei Siamashka #endif 20af654d14SBernhard Nortmann 21b19236fdSSiarhei Siamashka /* The low 8-bits of the 'boot_media' field in the SPL header */ 22b19236fdSSiarhei Siamashka #define SUNXI_BOOTED_FROM_MMC0 0 23*9acebe8aSOlliver Schinagl #define SUNXI_BOOTED_FROM_NAND 1 24*9acebe8aSOlliver Schinagl #define SUNXI_BOOTED_FROM_MMC2 2 25b19236fdSSiarhei Siamashka #define SUNXI_BOOTED_FROM_SPI 3 26b19236fdSSiarhei Siamashka 27e954eb80SBernhard Nortmann /* boot head definition from sun4i boot code */ 28e954eb80SBernhard Nortmann struct boot_file_head { 29e954eb80SBernhard Nortmann uint32_t b_instruction; /* one intruction jumping to real code */ 30e954eb80SBernhard Nortmann uint8_t magic[8]; /* ="eGON.BT0" or "eGON.BT1", not C-style str */ 31e954eb80SBernhard Nortmann uint32_t check_sum; /* generated by PC */ 32e954eb80SBernhard Nortmann uint32_t length; /* generated by PC */ 33e954eb80SBernhard Nortmann /* 34e954eb80SBernhard Nortmann * We use a simplified header, only filling in what is needed 35e954eb80SBernhard Nortmann * by the boot ROM. To be compatible with Allwinner tools we 36e954eb80SBernhard Nortmann * would need to implement the proper fields here instead of 37e954eb80SBernhard Nortmann * padding. 38a1884381SBernhard Nortmann * 39a1884381SBernhard Nortmann * Actually we want the ability to recognize our "sunxi" variant 40a1884381SBernhard Nortmann * of the SPL. To do so, let's place a special signature into the 41a1884381SBernhard Nortmann * "pub_head_size" field. We can reasonably expect Allwinner's 42a1884381SBernhard Nortmann * boot0 to always have the upper 16 bits of this set to 0 (after 43a1884381SBernhard Nortmann * all the value shouldn't be larger than the limit imposed by 44a1884381SBernhard Nortmann * SRAM size). 45a1884381SBernhard Nortmann * If the signature is present (at 0x14), then we know it's safe 46a1884381SBernhard Nortmann * to use the remaining 8 bytes (at 0x18) for our own purposes. 47a1884381SBernhard Nortmann * (E.g. sunxi-tools "fel" utility can pass information there.) 48e954eb80SBernhard Nortmann */ 49a1884381SBernhard Nortmann union { 50a1884381SBernhard Nortmann uint32_t pub_head_size; 51a1884381SBernhard Nortmann uint8_t spl_signature[4]; 52a1884381SBernhard Nortmann }; 53a1884381SBernhard Nortmann uint32_t fel_script_address; 54b19236fdSSiarhei Siamashka uint32_t reserved1[3]; 55b19236fdSSiarhei Siamashka uint32_t boot_media; /* written here by the boot ROM */ 56b19236fdSSiarhei Siamashka uint32_t reserved2[5]; /* padding, align to 64 bytes */ 57e954eb80SBernhard Nortmann }; 58e954eb80SBernhard Nortmann 59af654d14SBernhard Nortmann #define is_boot0_magic(addr) (memcmp((void *)addr, BOOT0_MAGIC, 8) == 0) 60af654d14SBernhard Nortmann 61cba69eeeSIan Campbell #endif 62