Benjamin, The MAR bits are simply to allow caching of the DDR region. Each bit stands for 16MBytes of external memory. 1 would indicate that region should be cached in L2 and 0 would disable caching. The 128to159 indicates this is for the 128th to 159th 16MB chunk in external memory which started from 0x80000000. Hence set it according to which region of DDR you wanted cached by the DSP. Generally this is the region where codec data memory resides [DDRALGHEAP]. Regards, Omkiran
2008/12/18 Benjamin Suljic <[email protected]> > Hi all, > > I am working on a custom DaVinci DM6446 board. I have been trying to change > the default memory map to allocate more memory for DDR2 on the DSP side but > without any luck. My application is running without codec engine. > > My default DSPLink configuration is: STATIC CONST LINKCFG_MemEntry > LINKCFG_memTable_00 [] = > { > { > 0, /* ENTRY : Entry number */ > "DSPLINKMEM", /* NAME : Name of the memory > region */ > 0x8FE00000, /* ADDRPHYS : Physical address */ > 0x8FE00000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x5000, /* SIZE : Size of the memory > region */ > TRUE /* SHARED : Shared access memory? */ > }, > { > 1, /* ENTRY : Entry number */ > "DSPLINKMEM1", /* NAME : Name of the memory > region */ > 0x8FE05000, /* ADDRPHYS : Physical address */ > 0x8FE05000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0xFB000, /* SIZE : Size of the memory > region */ > TRUE /* SHARED : Shared access memory? */ > }, > { > 2, /* ENTRY : Entry number */ > "RESETCTRL", /* NAME : Name of the memory > region */ > 0x8FF00000, /* ADDRPHYS : Physical address */ > 0x8FF00000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x00000080, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > }, > { > 3, /* ENTRY : Entry number */ > "DDR2", /* NAME : Name of the memory > region */ > 0x8FF00080, /* ADDRPHYS : Physical address */ > 0x8FF00080, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0xFFF80, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > }, > { > 4, /* ENTRY : Entry number */ > "DSPIRAM", /* NAME : Name of the memory > region */ > 0x11800000, /* ADDRPHYS : Physical address */ > 0x11800000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x10000, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > }, > { > 5, /* ENTRY : Entry number */ > "DSPL1DRAM", /* NAME : Name of the memory > region */ > 0x11F04000, /* ADDRPHYS : Physical address */ > 0x11F04000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0xC000, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > } > } ; > > I have followed the following tutorial on davinci wiki to change the memory > map. > http://tiexpressdsp.com/wiki/index.php?title=Changing_DSPLink_Memory_Map > > My new configuration is: > { > { > 0, /* ENTRY : Entry number */ > "DSPLINKMEM", /* NAME : Name of the memory > region */ > 0x8FB00000, /* ADDRPHYS : Physical address */ > 0x8FB00000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x5000, /* SIZE : Size of the memory > region */ > TRUE /* SHARED : Shared access memory? */ > }, > { > 1, /* ENTRY : Entry number */ > "DSPLINKMEM1", /* NAME : Name of the memory > region */ > 0x8FB05000, /* ADDRPHYS : Physical address */ > 0x8FB05000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0xFB000, /* SIZE : Size of the memory > region */ > TRUE /* SHARED : Shared access memory? */ > }, > { > 2, /* ENTRY : Entry number */ > "RESETCTRL", /* NAME : Name of the memory > region */ > 0x8FC00000, /* ADDRPHYS : Physical address */ > 0x8FC00000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x00000080, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > }, > { > 3, /* ENTRY : Entry number */ > "DDR2", /* NAME : Name of the memory > region */ > 0x8FC00080, /* ADDRPHYS : Physical address */ > 0x8FC00080, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x3FFF80, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > }, > { > 4, /* ENTRY : Entry number */ > "DSPIRAM", /* NAME : Name of the memory > region */ > 0x11800000, /* ADDRPHYS : Physical address */ > 0x11800000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0x10000, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > }, > { > 5, /* ENTRY : Entry number */ > "DSPL1DRAM", /* NAME : Name of the memory > region */ > 0x11F04000, /* ADDRPHYS : Physical address */ > 0x11F04000, /* ADDRDSPVIRT : DSP virtual address */ > (Uint32) -1, /* ADDRGPPVIRT : GPP virtual address (if > known) */ > 0xC000, /* SIZE : Size of the memory > region */ > FALSE /* SHARED : Shared access memory? */ > } > } ; > > I have changed DDR2 size from 1 to 4 MB and moved everything up for 3MB so > I can re size the DDR2. I have not changed the amount of memory that Linux > is allocation (mem=114MB). > > Old configuration: > DSPLINKMEM: > start from 254MB > size 1MB > DDR2: > start from 255MB > size 1MB > > New Configuration: > DSPLINKMEM > start from 251MB > size 1MB > DDR2 > start from 252MB > size 4MB > > I have made the same changes on the DSP side. What i don't know is do I > need to change > > prog.module("GBL").C64PLUSMAR128to159 = 0x0000FFF0 ; > > and to which value? > > Any suggerstion? > > > Tnx, > Benjamin > > > > > > > > > _______________________________________________ > Davinci-linux-open-source mailing list > [email protected] > http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source > >
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