uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(7)：CONFIG_MEM_MT48LC16M16A2TG_75

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ADI bf561 DSP

优视BF561EVB开发板

uclinux-2008r1.5-rc3

Visual DSP++ 5.0(update 5)

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在编译head.s时有一警告：

[Warning pp0038] "..\linux-2.6.x\include\asm/mach/mem_init.h":31 macro 'CONFIG_MEM_MT48LC<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75' not currently defined - 0 assumed

其指向的代码为mem_init.h中的如下代码：

#if (CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75 || CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="64" unitname="m">64M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="4" unitname="a">4A</chmetcnv>2FB_7E || CONFIG_MEM_GENERIC_BOARD || CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="8" unitname="m">8M</chmetcnv>32B2B5_7)

#if (CONFIG_SCLK_HZ > 119402985)

#define SDRAM_tRP TRP_2

#define SDRAM_tRP_num 2

#define SDRAM_tRAS TRAS_7

#define SDRAM_tRAS_num 7

#define SDRAM_tRCD TRCD_2

#define SDRAM_tWR TWR_2

#endif

…………….

#endif

在代码中搜索CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75有如下结果：

F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\.config(152):CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75=y

F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\arch\blackfin\configs\BF561-EZKIT_defconfig(144):CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75=y

F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\asm\mach\mem_init.h(31):#if (CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75 || CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="64" unitname="m">64M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="4" unitname="a">4A</chmetcnv>2FB_7E || CONFIG_MEM_GENERIC_BOARD || CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="8" unitname="m">8M</chmetcnv>32B2B5_7)

F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\asm\mach\mem_init.h(106):#if (CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75)

F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\config\auto.conf(231):CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75=y

F:\embed\uClinux\uClinux-dist-2008R1.5-RC3\linux-2.6.x\include\linux\autoconf.h(232):#define CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75 1

也即是说，在默认配置下这个开关是打开的，但是它的影响只局限在mem_init.h中。从mem_init.h中还可以发现，

#if (CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75 || CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="64" unitname="m">64M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="4" unitname="a">4A</chmetcnv>2FB_7E || CONFIG_MEM_GENERIC_BOARD || CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="8" unitname="m">8M</chmetcnv>32B2B5_7)

上面出现的4个宏分别为SDRAM定义了不同的参数，因此可以根据需要将这4个宏中的一个定义为1，比如定义CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75后就可以得到一组SDRAM的参数：

#if (CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75)

/*SDRAM INFORMATION: */

#define SDRAM_Tref 64 /* Refresh period in milliseconds */

#define SDRAM_NRA 8192 /* Number of row addresses in SDRAM */

#define SDRAM_CL CL_3

#endif

同样，其它的几个宏可以得到另外一组参数。

嗯，我们和ezkit取一样的值，在config.h中定义：

#define CONFIG_MEM_MT48LC<chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="m">16M</chmetcnv><chmetcnv w:st="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="16" unitname="a">16A</chmetcnv>2TG_75 1 // 参见include/asm/mach/mem_init.h

参考资料

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(1)：前言(<chsdate w:st="on" year="2009" month="1" day="12" islunardate="False" isrocdate="False">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(2)：代码注释(<chsdate w:st="on" year="2009" month="1" day="12" islunardate="False" isrocdate="False">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(3)：vdsp项目创建(<chsdate w:st="on" year="2009" month="1" day="12" islunardate="False" isrocdate="False">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(4)：目录差异(<chsdate w:st="on" year="2009" month="1" day="12" islunardate="False" isrocdate="False">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(5)：'bf561.h'的问题(<chsdate w:st="on" year="2009" month="1" day="12" islunardate="False" isrocdate="False">2009-1-12</chsdate>)

uclinux-2008R1.5-RC3(bf561)到VDSP5的移植(6)：CONFIG_BFIN_KERNEL_CLOCK(<chsdate w:st="on" year="2009" month="1" day="12" islunardate="False" isrocdate="False">2009-1-12</chsdate>)