uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(42)：.macro

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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)

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有一个错误：

[Error ea5004] "..\..\linux-2.6.x\include\asm/mach-common/context.S":35 Syntax Error in :

.macro save_context_with_interrupts

syntax error is at or near text 'save_context_with_interrupts'.

Attempting error recovery by ignoring text until the ';'

其指向的错误代码为：

/*

* Code to save processor context.

* We even save the register which are preserved by a function call

* - r4, r5, r6, r7, p3, p4, p5

*/

.macro save_context_with_interrupts

……………….

/* Switch to other method of keeping interrupts disabled. */

#ifdef CONFIG_DEBUG_HWERR

r0 = 0x3f;

sti r0;

#else

cli r0;

#endif

………………………

.endm

这里有两个问题，首先是vdsp的汇编器不支持.macro，只能用#define来替代，第二个是在里面出现了#ifdef这样的条件判断，只能将之移到宏定义的外面，修改后的代码为：

#ifdef CONFIG_DEBUG_HWERR

#define save_context_with_interrupts \

……………….. \

/* Switch to other method of keeping interrupts disabled. */ \

r0 = 0x3f; \

sti r0; \

………………. \

//.endm

#else

#define save_context_with_interrupts \

……………………….. \

/* Switch to other method of keeping interrupts disabled. */ \

cli r0; \

……………………….. \

//.endm

#endif // CONFIG_DEBUG_HWERR

其它宏的修改与此类似。

1 参考资料

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(37)：segment(2009-01-16)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(38)：未命名union的问题(2009-01-16)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(39)：CONFIG_BASE_SMALL(2009-1-16)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(40)：远调用(2009-1-17)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(41)：bfin_write_EVT15(2009-1-17)