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！