windows Mobile内存拓展
c:\WM653WEHH\PLATFORM\AM33X\SRC\INC\addrtab_cfg.incc:\WM653WEHH\PLATFORM\AM33X\SRC\INC\image_cfg.h
c:\WM653WEHH\PLATFORM\AM33X\SRC\KERNEL\OAL\init.c
在这三个文件中做了更改。
首先要说的是这个函数：
DWORDOEMEnumExtensionDRAM(PMEMORY_SECTION pMemSections, DWORD cMemSections)
{
DWORD dwExtMem=0;
pMemSections.dwFlags=0;
pMemSections.dwStart=IMAGE_WINCE_DRAM_EXT_PA;
pMemSections.dwLen=IMAGE_WINCE_DRAM_EXT_SIZE;
++dwExtMem;
OALMSGS(1, (L"OEMEnumExtensionDRAM!\r\n"));
return dwExtMem;
}
下划线的宏定义是在image_cfg.h中定义的，而这个位置是必须保持和在addrtab_cfg.inc文件中所做列举的内存映射一致，并且虚拟内存映射的范围必须在0x80000000~0xA0000000之间，否则也会导致失败。
查看MSDN可以发现：
-----------------------------------------------------PMEMORY_SECTION的定义如下----------------------------------------------------------------------
typedefstruct _MEMORY_SECTION {
DWORD dwFlags;
DWORD dwStart;
DWORD dwLen;
} MEMORY_SECTION, *PMEMORY_SECTION;
dwFlags
Reserved for future use.
Must be set to zero.
dwStart
Start address, statically mapped virtualaddress, of the memory section.//内存分段的起始地址，静态映射的虚拟地址
dwLen
Number of bytes in the memory section.
--------------------------------------------------------------------------END----------------------------------------------------------------------------------------
pMemSections.dwStart=IMAGE_WINCE_DRAM_EXT_PA;这个是在给定额外扩展内存的虚拟地址的起始位置，
pMemSections.dwLen=IMAGE_WINCE_DRAM_EXT_SIZE;这个是在给定额外扩展内存的虚拟地址的大小。
注意，查看这个PMEMORY_SECTION结构体中地址使用的是虚拟地址，由后面的解释部分可以看出来。
而这个地址的起始位置和大小已在addrtab_cfg.inc文件中列举出来。
============================这个是addrtab_cfg.inc文件中地址的映射设置：===============================
DCD 0x80000000,0x80000000,256 ; SDRAM
; DCD 0x8a000000,0x8a000000, 96 ; SDRAM for ramdisk,不需额外说明，续见image_cfg.h
DCD 0x90000000, 0x48000000,4 ; L4S
DCD 0x90400000, 0x4A000000,4 ; L4F
DCD 0x90800000, 0x44C00000,4 ; L4WKUP
DCD 0x90C00000, 0x47C00000,4 ; L4FW
DCD 0x91000000, 0x40300000,1 ; OCMC RAM
DCD 0x91100000, 0x08000000,16 ; NAND Flash SC0
DCD 0x92100000, 0x49000000,1 ; TPCC
DCD 0x92200000, 0x49800000,3 ; TPTC
DCD 0x92500000, 0x46000000,8 ; McASP
DCD 0x92D00000, 0x47400000,4 ; USB/CPPI
DCD 0x93100000, 0x47800000,1 ; MMCHS2
DCD 0x93200000, 0x53000000,1 ; SHA
DCD 0x93300000, 0x53400000,1 ; AES0
DCD 0x93400000, 0x54C00000,4 ; ADC_TSC
DCD 0x93800000, 0x56000000,16 ; SGX530
DCD 0x94800000, 0x40200000,1 ; SRAM
DCD 0x94900000, 0x4C000000,1 ; EMIF0
DCD 0x94A00000, 0x50000000,1 ; GPMC
DCD 0x94B00000,0x90000000, 181 ; RAM 181M（0x0B500000） SDRAMfor RAMDISK on second bank，
DCD 0x00000000, 0x00000000,0 ; end of table
===========================================END======================================================
---------------------------------------------------这个是image_cfg.h文件中关于扩展内存的定义------------------------------------------------
//
//Define: IMAGE_WINCE_DRAM_EXT
//
//Following constants define the base addressfor additional DRAM on the EVM.
//
#defineIMAGE_WINCE_DRAM_EXT_PA 0x94B00000//0x96000000
#defineIMAGE_WINCE_DRAM_EXT_SIZE 0x0b500000//181Mbyte
//
//Define: IMAGE_SHARE_ARGS_xxx
//
//Following constants define location andmaximal size of arguments shared
//between loader and kernel. For actualstructure see args.h file.
//
#defineIMAGE_SHARE_ARGS_PA 0x80000000
#defineIMAGE_SHARE_ARGS_CA 0x80000000
#defineIMAGE_SHARE_ARGS_SIZE 0x00001000
---------------------------------------------------------------------------------END----------------------------------------------------------------------------
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