快乐虾http://blog.csdn.net/lights_joy/lights@hb165.com本文适用于ADI bf561 DSP优视BF561EVB开发板uclinux-2008r1.5-rc3(smp patch)Visual DSP++ 5.0(update 5)欢迎转载，但请保留作者信息在uclinux初始化的时候有一段代码：/* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */call _bf53x_relocate_l1_mem;bf53x_relocate_l1_mem这个函数的实现在arch/blackfin/kernel/setup.c中，其作用是将设置SDRAM和PLL的代码从SDRAM或者Flash复制到L1中，如下所示：void __init bf53x_relocate_l1_mem(void){unsignedlong l1_code_length;unsignedlong l1_data_a_length;unsignedlong l1_data_b_length;l1_code_length = _etext_l1 - _stext_l1;if (l1_code_length > L1_CODE_LENGTH)l1_code_length = L1_CODE_LENGTH;/* cannot complain as printk is not available as yet.* But we can continue booting and complain later!*//* Copy _stext_l1 to _etext_l1 to L1 instruction SRAM */dma_memcpy(_stext_l1, _l1_lma_start, l1_code_length);l1_data_a_length = _ebss_l1 - _sdata_l1;if (l1_data_a_length > L1_DATA_A_LENGTH)l1_data_a_length = L1_DATA_A_LENGTH;/* Copy _sdata_l1 to _ebss_l1 to L1 data bank A SRAM */dma_memcpy(_sdata_l1, _l1_lma_start + l1_code_length, l1_data_a_length);l1_data_b_length = _ebss_b_l1 - _sdata_b_l1;if (l1_data_b_length > L1_DATA_B_LENGTH)l1_data_b_length = L1_DATA_B_LENGTH;/* Copy _sdata_b_l1 to _ebss_b_l1 to L1 data bank B SRAM */dma_memcpy(_sdata_b_l1, _l1_lma_start + l1_code_length +l1_data_a_length, l1_data_b_length);}但是由于在VDSP下使用方式1进行启动，且在LDF文件中直接将设置PLL这部分代码放在了L1中，因此并不需要再复制一次，所以直接注释掉这行语句，即不调用bf53x_relocate_l1_mem这个函数，自然也不需要这个函数的实现。
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