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)
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有一个错误:
"..\..\linux-2.6.x\include\linux/cpumask.h", line 88: cc0020: error:
identifier "CONFIG_NR_CPUS" is undefined
typedef struct { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
NR_CPUS的定义在linux-2.6.x/include/linux/threads.h中:
/*
* Maximum supported processors that can run under SMP. This value is
* set via configure setting. The maximum is equal to the size of the
* bitmasks used on that platform, i.e. 32 or 64. Setting this smaller
* saves quite a bit of memory.
*/
#ifdef CONFIG_SMP
#define NR_CPUS CONFIG_NR_CPUS
#else
#define NR_CPUS 1
#endif
由于希望使用SMP支持,故此定义了CONFIG_SMP,所以NR_CPUS的值就由CONFIG_NR_CPUS决定,查一下这个宏:
查找全部"CONFIG_NR_CPUS", 大小写匹配, 全字匹配, 子文件夹, 查找结果2, "F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x;F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\config", "*.*"
F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\.config(140):CONFIG_NR_CPUS=2
F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\.config.old(140):CONFIG_NR_CPUS=2
F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\config\auto.conf(81):CONFIG_NR_CPUS=2
F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\linux\autoconf.h(82):#define CONFIG_NR_CPUS 2
F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\linux\threads.h(17):#define NR_CPUS CONFIG_NR_CPUS
匹配行: 5 匹配文件: 5 合计搜索文件: 13469
uclinux内核将bf561的每一个核都视为一个独立的CPU,因此在config.h中补上定义:
// 多核支持
#define CONFIG_SMP 1
#define CONFIG_NR_CPUS 2
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(26):abs(2009-1-15)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(27):CONFIG_RWSEM_GENERIC_SPINLOCK(2009-1-15)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(28):CONFIG_HZ(2009-1-15)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(29):cmdline_init(2009-1-15)
uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(30):WARN(2009-1-15)