Local sdram in 8260 board
Hi,I try to make 60x sdram and the local sdram a continuous20M ram area to accommodate a 8M ramdisk in the motorola 8260 ads board.When it load the initrd,it will get machine check exception at address 0x1000004 which is in the local sdram.When i disable the
cache ,it will work. Does local sdram noncacheble?How should i
fix it?
davidzhang
7/13/2000
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Quoted 3 lines · zzh
...it will get machine check exception
at address0x1000004which is in the local sdram.When i disable the cache ,it will work.
It sounds like something is wrong with your memory controller configuration. The cache enable/disable also affect the type of bus cycles that are used to access memory.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
This could be the setup of the SDRAM control word. When the cache is enabled it begins bursting data from the SDRAM. When the SDRAM control word is not set to burst 32 bytes it will cause the memory exception.
Quoted 6 lines · Dan Malek
Quoted 3 lines · zzh
...it will get machine check exception
at address0x1000004which is in the local sdram.When i disable the cache ,it will work.
Quoted 6 lines
It sounds like something is wrong with your memory controller configuration. The cache enable/disable also affect the type of bus cycles that are used to access memory.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/