U-boot-1.1.6-2008R1到vdsp5(bf561)的移植记录（4）：提示信息

 

  

在编译start.s时，有这样的提示信息：

[Informational ea1056] "../../cpu/blackfin/start.S":165 Preg read after write which requires 4 extra cycles

查ea1056的解释：

ea1056

 

[Information ea1056] "<filename>"<line> <message>

 

Description:

 

This message constitutes advice from the assembler that the instruction indicated by <line> will stall the indicated number of cycles. <message> will describe the cause and duration of the stall.

 

Severity:

 

Information

 

Example:

 

Given the following sequence in file exception.asm, lines 131 and 132:

 

RETI = R0;

RTI;

 

When the default level of stall checking is active, the Blackfin assembler will produce:

 

[Informational ea1056] "./exception.asm":132 Sysreg read

after write which requires 4 extra cycle

 

How to fix:

 

No action is necessary, the message simply identifies code that will require extra cycles.

 

All stall messages may be suppressed in the Blackfin assembler by using the command-line switch:

-stallcheck=none

既然是No action is necessary，那就好办了，直接在project options->assemble->additional中加上-stallcheck=none

免得干扰！