作者：付汉杰，hankf@xilinx.com，文章转载自：赛灵思中文社区论坛
1. 介绍
有工程师反馈R5引导A53和R5的应用程序后，A53和R5的应用程序没有正确执行。因此做了一个MPSoC R5引导4个A53和两个R5的应用程序的例子。
2. FSBL
MPSoC的FSBL能引导多个CPU的应用程序。工程师可以不理解上述寄存器的细节。如果boot.bin里的某个parttiion是某一个CPU的可执行代码，FSBL中的函数XFsbl_Handoff( )会启动对应的CPU。如果是目标CPU是A53，会使用函数XFsbl_UpdateResetVector()更新A53的服务地址。
3. 应用程序例子
由于只是简单例子，所以所有CPU都使用同一个串口。为了防止所有CPU打印出来的信息，混杂在一起，所以在打印之后，增加了1秒钟延时。
打印中，增加了CPU的信息，用于区分不同CPU。
int main()
{
init_platform();
sleep(1);
for( int i=0; ; i++ )
{
xil_printf("No.%d Hello World from r5-aaa.\n\r", i );
sleep(1);
}
cleanup_platform();
return 0;
}
4. 内存分配
4个A53和两个R5的应用程序，都运行在DDR里。每个应用程序，必须使用不同的DDR空间。
CPU DDR起始地址 DDR大小
| A53-0 | 0x1000000 | 16MB |
| A53-1 | 0x2000000 | 16MB |
| A53-2 | 0x5000000 | 16MB |
| A53-3 | 0x6000000 | 16MB |
| R5-0 | 0x3000000 | 16MB |
| R5-1 | 0x4000000 | 16MB |
请根据上表，更新lscript.ld中的MEMORY里的ddr字段。A53-0的lscript.ld中的MEMORY部分，设置如下：
MEMORY
{
psu_ddr_0_MEM_0 : ORIGIN = 0x1000000, LENGTH = 0x1000000
}R5-0的lscript.ld中的MEMORY部分，设置如下：
MEMORY
{
psu_ocm_ram_0_MEM_0 : ORIGIN = 0xFFFC0000, LENGTH = 0x40000
psu_r5_0_atcm_MEM_0 : ORIGIN = 0x0, LENGTH = 0x10000
psu_r5_0_btcm_MEM_0 : ORIGIN = 0x20000, LENGTH = 0x10000
psu_r5_ddr_0_MEM_0 : ORIGIN = 0x3000000, LENGTH = 0x1000000
psu_r5_tcm_ram_0_MEM_0 : ORIGIN = 0x0, LENGTH = 0x40000
}
5. R5引导4个A53和两个R5的bif文件例子
在SDK里，制作启动文件boot.bin时，需要正确设置每个ELF文件的目标CPU。SDK不能根据ELF文件，自动设置目标CPU。如果设置错误，可能引起错误，导致相关CPU的代码，不能正确执行。
//arch = zynqmp; split = false; format = BIN
the_ROM_image:
{
[fsbl_config]r5_single
[bootloader]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\r5a_fsbl\Debug\d_r5a_fsbl.elf
[destination_cpu = a53-0]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\a53a_hello\Debug\d_a53a_hello.elf
[destination_cpu = a53-1]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\a53b_hello\Debug\d_a53b_hello.elf
[destination_cpu = a53-2]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\a53c_hello\Debug\d_a53c_hello.elf
[destination_cpu = a53-3]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\a53d_hello\Debug\d_a53d_hello.elf
[destination_cpu = r5-0]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\r5a_hello\Debug\d_r5a_hello.elf
[destination_cpu = r5-1]C:\prj\zcu106\v183\zcu106_bsp_hw_hdf\r5b_hello\Debug\d_r5b_hello.elf
}6. R5引导4个A53和两个R5的启动记录
Xilinx Zynq MP First Stage Boot Loader Release 2018.3 Oct 12 2020 - 17:32:08 Reset Mode : System Reset Platform: Silicon (4.0), Cluster ID 0xC0000100 Running on R5-0 Processor, Device Name: XCZU7EV Initializing TCM ECC Address 0xFFFD95F0, Length FFE00020, ECC initialized Address 0xFFFD95F0, Length FFE20000, ECC initialized FMC VADJ Configuration Successful Board Configuration successful Processor Initialization Done ================= In Stage 2 ============ SD1 with level shifter Boot Mode SD: rc= 0 File name is BOOT.BIN Multiboot Reg : 0x0 Image Header Table Offset 0x8C0 *****Image Header Table Details******** Boot Gen Ver: 0x1020000 No of Partitions: 0x9 Partition Header Address: 0x440 Partition Present Device: 0x0 Initialization Success ======= In Stage 3, Partition No:1 ======= UnEncrypted data Length: 0x2812 Data word offset: 0x2812 Total Data word length: 0x2812 Destination Load Address: 0x1000000 Execution Address: 0x1000000 Data word offset: 0x5CF0 Partition Attributes: 0x116 Partition 1 Load Success ======= In Stage 3, Partition No:2 ======= UnEncrypted data Length: 0x2812 Data word offset: 0x2812 Total Data word length: 0x2812 Destination Load Address: 0x2000000 Execution Address: 0x2000000 Data word offset: 0x8510 Partition Attributes: 0x216 Partition 2 Load Success ======= In Stage 3, Partition No:3 ======= UnEncrypted data Length: 0x2812 Data word offset: 0x2812 Total Data word length: 0x2812 Destination Load Address: 0x5000000 Execution Address: 0x5000000 Data word offset: 0xAD30 Partition Attributes: 0x316 Partition 3 Load Success ======= In Stage 3, Partition No:4 ======= UnEncrypted data Length: 0x2812 Data word offset: 0x2812 Total Data word length: 0x2812 Destination Load Address: 0x6000000 Execution Address: 0x6000000 Data word offset: 0xD550 Partition Attributes: 0x416 Partition 4 Load Success ======= In Stage 3, Partition No:5 ======= UnEncrypted data Length: 0x148 Data word offset: 0x148 Total Data word length: 0x148 Destination Load Address: 0x0 Execution Address: 0x3C Data word offset: 0xFD70 Partition Attributes: 0x51E XFsbl_PartitionCopy:Going for LOVEC HIGHVEC Mechanism for R5. XFsbl_PartitionLoad:After Partition Validation Going for LOVEC HIGHVEC Mechanism for R5. Partition 5 Load Success ======= In Stage 3, Partition No:6 ======= UnEncrypted data Length: 0x9B1 Data word offset: 0x9B1 Total Data word length: 0x9B1 Destination Load Address: 0x3000000 Execution Address: 0x0 Data word offset: 0xFEC0 Partition Attributes: 0x51E Partition 6 Load Success ======= In Stage 3, Partition No:7 ======= UnEncrypted data Length: 0x148 Data word offset: 0x148 Total Data word length: 0x148 Destination Load Address: 0x0 Execution Address: 0x3C Data word offset: 0x10880 Partition Attributes: 0x61E Initializing TCM ECC Address 0xFFFD95F0, Length FFE90000, ECC initialized Address 0xFFFD95F0, Length FFEB0000, ECC initialized Partition 7 Load Success ======= In Stage 3, Partition No:8 ======= UnEncrypted data Length: 0x9B1 Data word offset: 0x9B1 Total Data word length: 0x9B1 Destination Load Address: 0x4000000 Execution Address: 0x0 Data word offset: 0x109D0 Partition Attributes: 0x61E Partition 8 Load Success All Partitions Loaded ================= In Stage 4 ============ PMU-FW is not running, certain applications may not be supported. Protection configuration applied CPU 0x100 reset release, Exec State 0x0, HandoffAddress: 1000000 CPU 0x200 reset release, Exec State 0x0, HandoffAddress: 2000000 CPU 0x300 reset release, Exec State 0x0, HandoffAddress: 5000000 CPU 0x400 reset release, Exec State 0x0, HandoffAddress: 6000000 CPU 0x600 reset release, Exec State 0x8, HandoffAddress: 3C XFsbl_Handoff:Restored R5LovecBuffer to LOVEC for R5. Running Cpu Handoff address: 0x3C, Exec State: 8 Exit from FSBL No.0 Hello World from a53-aaa. No.0 Hello World from a53-bbb. No.0 Hello World from a53-ccc. No.0 Hello World from a53-ddd. No.0 Hello World from r5-bbb. No.0 Hello World from r5-aaa. No.1 Hello World from a53-aaa. No.1 Hello World from a53-bbb. No.1 Hello World from a53-ccc. No.1 Hello World from a53-ddd. No.1 Hello World from r5-bbb. No.1 Hello World from r5-aaa. No.2 Hello World from a53-aaa. No.2 Hello World from a53-bbb. No.2 Hello World from a53-ccc. No.2 Hello World from a53-ddd. No.2 Hello World from r5-bbb.
7. APU Module
由于MPSoC的FSBL能引导多个CPU的应用程序，工程师可以不理解下述寄存器的细节。
APU Module的基地址是0xFD5C0000，下列寄存器用于设置APU的复位地址。
RVBARADDR0L 0x00000040 Reset Vector Base Address RVBARADDR0H 0x00000044 Reset Vector Base Address RVBARADDR1L 0x00000048 Reset Vector Base Address RVBARADDR1H 0x0000004C Reset Vector Base Address RVBARADDR2L 0x00000050 Reset Vector Base Address RVBARADDR2H 0x00000054 Reset Vector Base Address RVBARADDR3L 0x00000058 Reset Vector Base Address RVBARADDR3H 0x0000005C Reset Vector Base Address
8. RPU Module
RPU Module的基地址是0xFF9A0000，下列寄存器用于设置RPU的复位地址。
RPU0_CFG 0x00000100 Configuration Parameters specific to RPU0 RPU1_CFG 0x00000200 Configuration Parameters specific to RPU1
