120 lines
4.1 KiB
C
120 lines
4.1 KiB
C
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/*
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* (C) Copyright 2018
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* wangwei <wangwei@allwinnertech.com>
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*/
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#include <config.h>
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#include <private_boot0.h>
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#include <commit_info.h>
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#ifdef CFG_ARCH_RISCV
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#define BROM_FILE_HEAD_SIZE (sizeof(boot0_file_head_t) & 0x00FFFFF)
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#define BROM_FILE_HEAD_BIT_10_1 ((BROM_FILE_HEAD_SIZE & 0x7FE) >> 1)
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#define BROM_FILE_HEAD_BIT_11 ((BROM_FILE_HEAD_SIZE & 0x800) >> 11)
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#define BROM_FILE_HEAD_BIT_19_12 ((BROM_FILE_HEAD_SIZE & 0xFF000) >> 12)
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#define BROM_FILE_HEAD_BIT_20 ((BROM_FILE_HEAD_SIZE & 0x100000) >> 20)
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#define BROM_FILE_HEAD_SIZE_OFFSET ((BROM_FILE_HEAD_BIT_20 << 31) | \
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(BROM_FILE_HEAD_BIT_10_1 << 21) | \
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(BROM_FILE_HEAD_BIT_11 << 20) | \
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(BROM_FILE_HEAD_BIT_19_12 << 12))
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#define JUMP_INSTRUCTION (BROM_FILE_HEAD_SIZE_OFFSET | 0x6f)
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#else
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#define BROM_FILE_HEAD_SIZE_OFFSET (((sizeof(boot0_file_head_t) + sizeof(int) - 1) / sizeof(int) - 2))
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#define JUMP_INSTRUCTION (BROM_FILE_HEAD_SIZE_OFFSET | 0xEA000000)
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#endif
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const boot0_file_head_t fes1_head = {
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{
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/* jump_instruction */
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JUMP_INSTRUCTION,
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BOOT0_MAGIC,
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STAMP_VALUE,
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32,
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sizeof(boot_file_head_t),
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BOOT_PUB_HEAD_VERSION,
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(CONFIG_FES1_RUN_ADDR + sizeof(boot0_file_head_t) - sizeof(fes1_head.fes_union_addr)),
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CONFIG_FES1_RUN_ADDR,
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0,
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{
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0, 0, '3','.','0','.','0',0
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},
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},
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{
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//__u32 prvt_head_size;
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0,
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//char prvt_head_vsn[4];
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0,
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0, /*power_mode*/
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{0},/* reserver[2] */
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//unsigned int dram_para[32] ;
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{0},
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//__s32 uart_port;
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0,
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//normal_gpio_cfg uart_ctrl[2];
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{
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{ 2, 8, 4, 1, 1, 0, {0}},//PB8: 4--RX
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{ 2, 9, 4, 1, 1, 0, {0}},//PB9: 4--TX
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},
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//__s32 enable_jtag;
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0,
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//normal_gpio_cfg jtag_gpio[5];
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{{0},{0},{0},{0},{0}},
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//normal_gpio_cfg storage_gpio[32];
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{
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{6, 0, 2, 1, 2, 0, {0} },//PF0-5: 2--SDC
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{6, 1, 2, 1, 2, 0, {0} },
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{6, 2, 2, 1, 2, 0, {0} },
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{6, 3, 2, 1, 2, 0, {0} },
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{6, 4, 2, 1, 2, 0, {0} },
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{6, 5, 2, 1, 2, 0, {0} },
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},
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//char storage_data[512 - sizeof(normal_gpio_cfg) * 32];
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{0}
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},
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.hash = CI_INFO,
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#ifdef CFG_SUNXI_SELECT_DRAM_PARA
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.fes_union_addr.extd_head.magic = DRAM_EXT_MAGIC,
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#endif
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};
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/*******************************************************************************
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*
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* 关于Boot_file_head中的jump_instruction字段
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*
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* jump_instruction字段存放的是一条跳转指令：( B BACK_OF_Boot_file_head )，此跳
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*转指令被执行后，程序将跳转到Boot_file_head后面第一条指令。
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*
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* ARM指令中的B指令编码如下：
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* +--------+---------+------------------------------+
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* | 31--28 | 27--24 | 23--0 |
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* +--------+---------+------------------------------+
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* | cond | 1 0 1 0 | signed_immed_24 |
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* +--------+---------+------------------------------+
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* 《ARM Architecture Reference Manual》对于此指令有如下解释：
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* Syntax :
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* B{<cond>} <target_address>
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* <cond> Is the condition under which the instruction is executed. If the
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* <cond> is ommitted, the AL(always,its code is 0b1110 )is used.
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* <target_address>
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* Specified the address to branch to. The branch target address is
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* calculated by:
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* 1. Sign-extending the 24-bit signed(wro's complement)immediate
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* to 32 bits.
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* 2. Shifting the result left two bits.
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* 3. Adding to the contents of the PC, which contains the address
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* of the branch instruction plus 8.
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*
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* 由此可知，此指令编码的最高8位为：0b11101010，低24位根据Boot_file_head的大小动
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*态生成，所以指令的组装过程如下：
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* ( sizeof( boot_file_head_t ) + sizeof( int ) - 1 ) / sizeof( int )
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* 求出文件头占用的“字”的个数
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* - 2 减去PC预取的指令条数
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* & 0x00FFFFFF 求出signed-immed-24
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* | 0xEA000000 组装成B指令
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*
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*******************************************************************************/
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