diff options
| -rw-r--r-- | arch/arm/include/asm/arch-sunxi/spl.h | 19 | ||||
| -rw-r--r-- | tools/mksunxiboot.c | 4 |
2 files changed, 22 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-sunxi/spl.h b/arch/arm/include/asm/arch-sunxi/spl.h index 5bcd0eb..d2ce848 100644 --- a/arch/arm/include/asm/arch-sunxi/spl.h +++ b/arch/arm/include/asm/arch-sunxi/spl.h @@ -9,6 +9,8 @@ #define _ASM_ARCH_SPL_H_ #define BOOT0_MAGIC "eGON.BT0" +#define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */ +#define SPL_HEADER_VERSION 1 /* boot head definition from sun4i boot code */ struct boot_file_head { @@ -21,8 +23,23 @@ struct boot_file_head { * 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.) */ - uint8_t pad[12]; /* align to 32 bytes */ + union { + uint32_t pub_head_size; + uint8_t spl_signature[4]; + }; + uint32_t fel_script_address; + uint32_t reserved; /* padding, align to 32 bytes */ }; #endif diff --git a/tools/mksunxiboot.c b/tools/mksunxiboot.c index 54f4d05..9c1c5b7 100644 --- a/tools/mksunxiboot.c +++ b/tools/mksunxiboot.c @@ -118,6 +118,10 @@ int main(int argc, char *argv[]) ALIGN(file_size + sizeof(struct boot_file_head), BLOCK_SIZE); img.header.b_instruction = cpu_to_le32(img.header.b_instruction); img.header.length = cpu_to_le32(img.header.length); + + memcpy(img.header.spl_signature, SPL_SIGNATURE, 3); /* "sunxi" marker */ + img.header.spl_signature[3] = SPL_HEADER_VERSION; + gen_check_sum(&img.header); count = write(fd_out, &img, le32_to_cpu(img.header.length)); |