diff options
Diffstat (limited to 'arch/arm/include/asm/arch-sunxi/spl.h')
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/spl.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/spl.h b/arch/arm/include/asm/arch-sunxi/spl.h new file mode 100644 index 0000000..8c916e8 --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/spl.h @@ -0,0 +1,90 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2007-2011 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie <tangliang@allwinnertech.com> + */ +#ifndef _ASM_ARCH_SPL_H_ +#define _ASM_ARCH_SPL_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) + +#define SPL_ADDR CONFIG_SUNXI_SRAM_ADDRESS + +/* The low 8-bits of the 'boot_media' field in the SPL header */ +#define SUNXI_BOOTED_FROM_MMC0 0 +#define SUNXI_BOOTED_FROM_NAND 1 +#define SUNXI_BOOTED_FROM_MMC2 2 +#define SUNXI_BOOTED_FROM_SPI 3 +#define SUNXI_BOOTED_FROM_MMC0_HIGH 0x10 +#define SUNXI_BOOTED_FROM_MMC2_HIGH 0x12 + +/* 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)]; + +#define is_boot0_magic(addr) (memcmp((void *)addr, BOOT0_MAGIC, 8) == 0) + +uint32_t sunxi_get_boot_device(void); + +#endif |