uclinux-2008R1-RC8(bf561)到VDSP5的移植（9）：bf53x_relocate_l1_mem

在uclinux初始化的時候有一段代碼：

/* Put The Code for PLL Programming and SDRAM Programming in L1 ISRAM */
call _bf53x_relocate_l1_mem;

bf53x_relocate_l1_mem這個函數的實現在arch/blackfin/kernel/setup.c中，其作用是將設置SDRAM和PLL的代碼從SDRAM或者Flash復制到L1中，如下所示：

void __init bf53x_relocate_l1_mem(void)
{
unsigned long l1_code_length;
unsigned long l1_data_a_length;
unsigned long 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);

}

但是由於我使用了方式1進行啟動，且在LDF文件中直接將這部分代碼放在了L1中，因此並不需要再復制一次，所以直接注釋掉這行語句，即不調用bf53x_relocate_l1_mem這個函數。