rev 0.1
快乐虾
http://blog.csdn.net/lights_joy/
本文适用于
ADI bf561 DSP
uclinux-2008r1.5-rc3(smp patch)
Visual DSP++ 5.0(update 5)
欢迎转载,但请保留作者信息
内核panic,提示为
L1 data memory overflow
这个错误的代码发生在setup_arch:
l1_length = _ebss_l1 - _sdata_l1;
if (l1_length > L1_DATA_A_LENGTH)
panic("L1 data memory overflow\n");
在这里_ebss_l1和_sdata_l1是定义在uclinux.ldf中的两个值:
L1_data_a
{
INPUT_SECTION_ALIGN(4)
__sdata_l1 = .;
INPUT_SECTIONS($OBJECTS_CORE_A{DualCoreMem("CoreA")}(cplb_data) $LIBRARIES_CORE_A{DualCoreMem("CoreA")}(cplb_data))
INPUT_SECTIONS($OBJECTS_CORE_A(cplb_data) $LIBRARIES_CORE_A(cplb_data))
INPUT_SECTIONS($OBJECTS_CORE_A(voldata) $LIBRARIES_CORE_A(voldata))
INPUT_SECTIONS($OBJECTS_CORE_A(.edt) $LIBRARIES_CORE_A(.edt))
INPUT_SECTIONS($OBJECTS_CORE_A(.cht) $LIBRARIES_CORE_A(.cht))
INPUT_SECTIONS($OBJECTS_CORE_A(.l1.data) $LIBRARIES_CORE_A(.l1.data))
/*$VDSG<insert-input-sections-at-the-end-of-l1_data_a> */
/* Text inserted between these $VDSG comments will be preserved */
/*$VDSG<insert-input-sections-at-the-end-of-l1_data_a> */
__edata_l1 = .;
} > MEM_A_L1_DATA_A
bsz_L1_data_a ZERO_INIT
{
INPUT_SECTION_ALIGN(4)
__sbss_l1 = .;
INPUT_SECTIONS($OBJECTS_CORE_A(bsz) $LIBRARIES_CORE_A(bsz))
INPUT_SECTIONS($OBJECTS_CORE_A(.l1.bss) $LIBRARIES_CORE_A(.l1.bss))
__ebss_l1 = .;
} > MEM_A_L1_DATA_A
但是由于在生成uclinux工程的时候,没有选择启用cache,vdsp将把l1_data_a的32k空间全部拿来当data memory,而uclinux则需要启用16k的空间来做为cache。为此需要调整MEM_A_L1_DATA_A的定义,让其只使用16k的空间:
MEM_A_L1_DATA_A { TYPE(RAM) START(0xFF800000) END(0xFF803FFF) WIDTH(8) }
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(52):__ebss_l1(2009-1-28)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(53):ARRAY_SIZE(2009-1-30)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(54):MEM_SDRAM_BANKx(2009-2-1)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(55):CONFIG_FLAT_NODE_MEM_MAP(2009-02-03)